单项选择题

By "some people" I mean me. Why is it that an evening stroll(散步) leaves me feeling eaten alive while my companions are left blissfully un-bitten Studies suggest that about 20 percent of people are "high attractor types" who are especially appealing to the female mosquitoes (蚊子) seeking out blood for the extra protein (蛋白质) they need to lay eggs. Of course, not all mosquitoes are the same. But let’ s consider some of the more general properties that affect your mosquito appeal. Clothing Color It’s true, mosquitoes have discerning(有辨识能力的) fashion taste. Or at least, they’ re more likely to spot you as a target if you stand out from your environment. Dark colors, especially, will attract more of the insect. Body Heat Visual clues allow the mosquito to locate you from relatively far away, but as she approaches, it’ s your body heat that draws her in. This puts pregnant women, who average about 1. 26 degrees Fahrenheit (华氏温度) warmer than others, at a particular risk—a fact which has been substantiated (证实) by a number of studies. Carbon Dioxide This is another reason pregnant women are at a disadvantage. Mosquitoes can detect carbon dioxide using a special organ called a maxillary palp (下颚须) from as far as 164 feet away. Unfortunately for mothers-to-be, pregnancy causes women to emit 21 percent more CO ₂ . This is also why kids are often safe from bites, when bigger, more CO ₂ -emitting adults are around. Alcohol Intake On the flip side(另一方面) , pregnant women are (presumably) avoiding another mosquito attractor: alcohol. Although it’ s unclear how mosquitoes go about detecting the presence of ethanol(乙醇), studies show that drinking even just 12 ounces of beer will significantly increase the attention you receive from the pests. The Properties of Your Skin and Sweat Up to 85 percent of your susceptibility(敏感性) to mosquito bites has nothing to do with what you’re drinking, wearing or how much heat your body emits—it’ s just genetic. Specifically, the composition of your skin bacteria—the kind that naturally and healthily exists there—can serve as an attractor. Blood Type Another factor you can ’ t control Your blood type. And it stands to reason that, if the mosquito is there to suck your blood, she cares what kind she’ s getting. People with blood type O are more prone to mosquito bites than those with type B, with type A folks bringing up the rear.What is NOT the reason why the pregnant women have a high risk of mosquito appeal

A．They emit more CO ₂ than normal people.
B．The air surrounding them are much warmer than others.
C．They drink alcohol.
D．They emit more heat than people around.

你可能感兴趣的试题

单项选择题

By "some people" I mean me. Why is it that an evening stroll(散步) leaves me feeling eaten alive while my companions are left blissfully un-bitten Studies suggest that about 20 percent of people are "high attractor types" who are especially appealing to the female mosquitoes (蚊子) seeking out blood for the extra protein (蛋白质) they need to lay eggs. Of course, not all mosquitoes are the same. But let’ s consider some of the more general properties that affect your mosquito appeal. Clothing Color It’s true, mosquitoes have discerning(有辨识能力的) fashion taste. Or at least, they’ re more likely to spot you as a target if you stand out from your environment. Dark colors, especially, will attract more of the insect. Body Heat Visual clues allow the mosquito to locate you from relatively far away, but as she approaches, it’ s your body heat that draws her in. This puts pregnant women, who average about 1. 26 degrees Fahrenheit (华氏温度) warmer than others, at a particular risk—a fact which has been substantiated (证实) by a number of studies. Carbon Dioxide This is another reason pregnant women are at a disadvantage. Mosquitoes can detect carbon dioxide using a special organ called a maxillary palp (下颚须) from as far as 164 feet away. Unfortunately for mothers-to-be, pregnancy causes women to emit 21 percent more CO ₂ . This is also why kids are often safe from bites, when bigger, more CO ₂ -emitting adults are around. Alcohol Intake On the flip side(另一方面) , pregnant women are (presumably) avoiding another mosquito attractor: alcohol. Although it’ s unclear how mosquitoes go about detecting the presence of ethanol(乙醇), studies show that drinking even just 12 ounces of beer will significantly increase the attention you receive from the pests. The Properties of Your Skin and Sweat Up to 85 percent of your susceptibility(敏感性) to mosquito bites has nothing to do with what you’re drinking, wearing or how much heat your body emits—it’ s just genetic. Specifically, the composition of your skin bacteria—the kind that naturally and healthily exists there—can serve as an attractor. Blood Type Another factor you can ’ t control Your blood type. And it stands to reason that, if the mosquito is there to suck your blood, she cares what kind she’ s getting. People with blood type O are more prone to mosquito bites than those with type B, with type A folks bringing up the rear.According to the author, which factor below serves as the most influencing one in mosquito appealing

A．Alcohol drinking.
B．Clothing color.
C．The properties of the skin and sweat.
D．The body heat.

单项选择题

It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modern ways: that they are possessive and dominant: that they do not trust their children to deal with crises: that they talk too much about certain problems—and that they have no sense of humor, at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste. Sometimes you are resistant and proud because you do not want your parents to approve of what you do. If they did approve, it looks as if you are betraying your own age group. But in that case, you are assuming that you are underdog(失败者) : you can’t win but at least you can keep your honor. This is a passive way of looking at things. It is natural enough after long years of childhood, when you were completely under your parents’ control. But it ignores the fact that you are now beginning to be responsible for yourself. If you plan to control your life, co-operation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.The author is primarily addressing______.

A．parents of teenagers
B．newspaper readers
C．teenagers
D．those who give advice to teenagers

单项选择题

By "some people" I mean me. Why is it that an evening stroll(散步) leaves me feeling eaten alive while my companions are left blissfully un-bitten Studies suggest that about 20 percent of people are "high attractor types" who are especially appealing to the female mosquitoes (蚊子) seeking out blood for the extra protein (蛋白质) they need to lay eggs. Of course, not all mosquitoes are the same. But let’ s consider some of the more general properties that affect your mosquito appeal. Clothing Color It’s true, mosquitoes have discerning(有辨识能力的) fashion taste. Or at least, they’ re more likely to spot you as a target if you stand out from your environment. Dark colors, especially, will attract more of the insect. Body Heat Visual clues allow the mosquito to locate you from relatively far away, but as she approaches, it’ s your body heat that draws her in. This puts pregnant women, who average about 1. 26 degrees Fahrenheit (华氏温度) warmer than others, at a particular risk—a fact which has been substantiated (证实) by a number of studies. Carbon Dioxide This is another reason pregnant women are at a disadvantage. Mosquitoes can detect carbon dioxide using a special organ called a maxillary palp (下颚须) from as far as 164 feet away. Unfortunately for mothers-to-be, pregnancy causes women to emit 21 percent more CO ₂ . This is also why kids are often safe from bites, when bigger, more CO ₂ -emitting adults are around. Alcohol Intake On the flip side(另一方面) , pregnant women are (presumably) avoiding another mosquito attractor: alcohol. Although it’ s unclear how mosquitoes go about detecting the presence of ethanol(乙醇), studies show that drinking even just 12 ounces of beer will significantly increase the attention you receive from the pests. The Properties of Your Skin and Sweat Up to 85 percent of your susceptibility(敏感性) to mosquito bites has nothing to do with what you’re drinking, wearing or how much heat your body emits—it’ s just genetic. Specifically, the composition of your skin bacteria—the kind that naturally and healthily exists there—can serve as an attractor. Blood Type Another factor you can ’ t control Your blood type. And it stands to reason that, if the mosquito is there to suck your blood, she cares what kind she’ s getting. People with blood type O are more prone to mosquito bites than those with type B, with type A folks bringing up the rear.What is false about the " clothing color" and "body heat" factors

A．The heat surrounding you helps to attract the mosquito far away.
B．The mosquito easily detects people who wear different colors from others.
C．Mosquitoes like warm places.
D．The pregnant women get bitten much easier because they are warmer.

单项选择题

In many countries, governments are trying to get citizens to eat more healthily. One way in which governments are trying to do this is by increasing taxes on foods that are unhealthy. For example, Denmark, a country in Europe, taxes products that contain a lot of sugar, such as ice cream and chocolate. In 2011, the Danish government went one step further and introduced a tax on the fats contained in foods like butter and cheese. However, experts do not agree whether such taxes work. Some health experts have always disagreed with taxing fats. They say we need to consider each food separately and not simply worry about how much fat it contains. For the same reason, Danish dairy farmers felt that the government was wrong to say that the foods they produce are unhealthy. Cheese, for example, contains a lot of fat, but it does not seem to lead to health problems in the way other kinds of fat do. Such critics believe that the government should instead try to make healthy foods, such as vegetables, cheaper. There have also been economic problems because of the tax. The Danish government thought that if the cost of fatty foods went up, people would not buy as much of them. However, some foods such as butter and cheese are an important part of the traditional Danish diet. Since these could not be bought in Denmark at reasonable prices, many Danish people began shopping in nearby countries. One study discovered that as many as 48 percent of Danish people were going to Germany or Sweden to do shopping, and the Danish economy lost about $1.8 billion because of this. For these reasons, the Danish government decided to get rid of the tax after only one year. However, many doctors say that one year is not long enough to know if the tax helped Danish citizens’ health. They claim that the Danish government is worried more about the economy than it is about the Danish people. But even though the tax did not work in Denmark, some countries have not given up on the idea. The United Kingdom and France are thinking of trying similar taxes, and Hungary has already put a tax on fatty foods.What is one way governments are trying to make people healthier

A．By promoting low-fat versions of many popular foods.
B．By forcing them to pay more for certain kinds of food.
C．By decreasing the amount of sugar allowed in products.
D．By creating laws concerning how much people are allowed to eat.

单项选择题

According to psychologists(心理学家) , an emotion is aroused when a man or animal views something as either bad or good. When a person feels like running away from something he thinks will hurt him, we call this emotion fear. If the person wants to remove the danger by attacking it, we call the emotion anger. The emotions of joy and love are aroused when we think something can help us. An emotion does not have to be created by something in the outside world. It can be created by a person’ s thoughts. Everyone has emotions. Many psychologists believe that infants are born without emotions. They believe children learn emotions just as they learn to read and write. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion. Psychologists think that there are two types of emotions: positive and negative. Positive emotions include love, liking, joy, delight and hope. They are aroused by something that appeals to a person. Negative emotions make a person unhappy or dissatisfied. They include anger, fear, despair, sadness and disgust. In growing up, a person learns to cope with the negative emotions in order to be happy. Emotions may be weak or strong. Some strong emotions are so unpleasant that a person will try any means to escape from them. In order to feel happy, the person may choose unusual ways to avoid the emotion. Strong emotions can make it hard to think and to solve problems. They may prevent a person from learning or paying attention to what he is doing. For example, a student taking an examination may be so worried about failing that he cannot think properly. The worry drains valuable mental energy he needs for the examination.We learn from the passage that an emotion is created by something______.

A．one thinks bad or good
B．one feels in danger
C．one faces in the outside world
D．one tries to escape from real life

单项选择题

It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modern ways: that they are possessive and dominant: that they do not trust their children to deal with crises: that they talk too much about certain problems—and that they have no sense of humor, at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste. Sometimes you are resistant and proud because you do not want your parents to approve of what you do. If they did approve, it looks as if you are betraying your own age group. But in that case, you are assuming that you are underdog(失败者) : you can’t win but at least you can keep your honor. This is a passive way of looking at things. It is natural enough after long years of childhood, when you were completely under your parents’ control. But it ignores the fact that you are now beginning to be responsible for yourself. If you plan to control your life, co-operation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.The first paragraph is mainly about______.

A．the teenagers’ criticism of their parents
B．misunderstandings between teenagers and their parents
C．the dominance of the parents over their children
D．the teenagers’ ability to deal with crises

单项选择题

In many countries, governments are trying to get citizens to eat more healthily. One way in which governments are trying to do this is by increasing taxes on foods that are unhealthy. For example, Denmark, a country in Europe, taxes products that contain a lot of sugar, such as ice cream and chocolate. In 2011, the Danish government went one step further and introduced a tax on the fats contained in foods like butter and cheese. However, experts do not agree whether such taxes work. Some health experts have always disagreed with taxing fats. They say we need to consider each food separately and not simply worry about how much fat it contains. For the same reason, Danish dairy farmers felt that the government was wrong to say that the foods they produce are unhealthy. Cheese, for example, contains a lot of fat, but it does not seem to lead to health problems in the way other kinds of fat do. Such critics believe that the government should instead try to make healthy foods, such as vegetables, cheaper. There have also been economic problems because of the tax. The Danish government thought that if the cost of fatty foods went up, people would not buy as much of them. However, some foods such as butter and cheese are an important part of the traditional Danish diet. Since these could not be bought in Denmark at reasonable prices, many Danish people began shopping in nearby countries. One study discovered that as many as 48 percent of Danish people were going to Germany or Sweden to do shopping, and the Danish economy lost about $1.8 billion because of this. For these reasons, the Danish government decided to get rid of the tax after only one year. However, many doctors say that one year is not long enough to know if the tax helped Danish citizens’ health. They claim that the Danish government is worried more about the economy than it is about the Danish people. But even though the tax did not work in Denmark, some countries have not given up on the idea. The United Kingdom and France are thinking of trying similar taxes, and Hungary has already put a tax on fatty foods.Dairy farmers in Denmark______.

A．felt that they were being made to produce too many products
B．were worried that the government was planning to ban cheese
C．argued that their products are healthier than the government said
D．admitted that their products contained an unhealthy amount of fat

单项选择题

By "some people" I mean me. Why is it that an evening stroll(散步) leaves me feeling eaten alive while my companions are left blissfully un-bitten Studies suggest that about 20 percent of people are "high attractor types" who are especially appealing to the female mosquitoes (蚊子) seeking out blood for the extra protein (蛋白质) they need to lay eggs. Of course, not all mosquitoes are the same. But let’ s consider some of the more general properties that affect your mosquito appeal. Clothing Color It’s true, mosquitoes have discerning(有辨识能力的) fashion taste. Or at least, they’ re more likely to spot you as a target if you stand out from your environment. Dark colors, especially, will attract more of the insect. Body Heat Visual clues allow the mosquito to locate you from relatively far away, but as she approaches, it’ s your body heat that draws her in. This puts pregnant women, who average about 1. 26 degrees Fahrenheit (华氏温度) warmer than others, at a particular risk—a fact which has been substantiated (证实) by a number of studies. Carbon Dioxide This is another reason pregnant women are at a disadvantage. Mosquitoes can detect carbon dioxide using a special organ called a maxillary palp (下颚须) from as far as 164 feet away. Unfortunately for mothers-to-be, pregnancy causes women to emit 21 percent more CO ₂ . This is also why kids are often safe from bites, when bigger, more CO ₂ -emitting adults are around. Alcohol Intake On the flip side(另一方面) , pregnant women are (presumably) avoiding another mosquito attractor: alcohol. Although it’ s unclear how mosquitoes go about detecting the presence of ethanol(乙醇), studies show that drinking even just 12 ounces of beer will significantly increase the attention you receive from the pests. The Properties of Your Skin and Sweat Up to 85 percent of your susceptibility(敏感性) to mosquito bites has nothing to do with what you’re drinking, wearing or how much heat your body emits—it’ s just genetic. Specifically, the composition of your skin bacteria—the kind that naturally and healthily exists there—can serve as an attractor. Blood Type Another factor you can ’ t control Your blood type. And it stands to reason that, if the mosquito is there to suck your blood, she cares what kind she’ s getting. People with blood type O are more prone to mosquito bites than those with type B, with type A folks bringing up the rear.What is NOT the reason why the pregnant women have a high risk of mosquito appeal

A．They emit more CO ₂ than normal people.
B．The air surrounding them are much warmer than others.
C．They drink alcohol.
D．They emit more heat than people around.

单项选择题

It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modern ways: that they are possessive and dominant: that they do not trust their children to deal with crises: that they talk too much about certain problems—and that they have no sense of humor, at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste. Sometimes you are resistant and proud because you do not want your parents to approve of what you do. If they did approve, it looks as if you are betraying your own age group. But in that case, you are assuming that you are underdog(失败者) : you can’t win but at least you can keep your honor. This is a passive way of looking at things. It is natural enough after long years of childhood, when you were completely under your parents’ control. But it ignores the fact that you are now beginning to be responsible for yourself. If you plan to control your life, co-operation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.Teenagers tend to have strange clothes and hairstyles because they______.

A．want to irritate their parents
B．have a strong desire to be leaders in style and taste
C．have no other way to enjoy themselves better
D．want to show their existence by creating a culture of their own

单项选择题

According to psychologists(心理学家) , an emotion is aroused when a man or animal views something as either bad or good. When a person feels like running away from something he thinks will hurt him, we call this emotion fear. If the person wants to remove the danger by attacking it, we call the emotion anger. The emotions of joy and love are aroused when we think something can help us. An emotion does not have to be created by something in the outside world. It can be created by a person’ s thoughts. Everyone has emotions. Many psychologists believe that infants are born without emotions. They believe children learn emotions just as they learn to read and write. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion. Psychologists think that there are two types of emotions: positive and negative. Positive emotions include love, liking, joy, delight and hope. They are aroused by something that appeals to a person. Negative emotions make a person unhappy or dissatisfied. They include anger, fear, despair, sadness and disgust. In growing up, a person learns to cope with the negative emotions in order to be happy. Emotions may be weak or strong. Some strong emotions are so unpleasant that a person will try any means to escape from them. In order to feel happy, the person may choose unusual ways to avoid the emotion. Strong emotions can make it hard to think and to solve problems. They may prevent a person from learning or paying attention to what he is doing. For example, a student taking an examination may be so worried about failing that he cannot think properly. The worry drains valuable mental energy he needs for the examination.Which of the following is NOT true

A．Children learn emotions as they grow up.
B．Babies are born with emotions.
C．Emotions fall into two types in general.
D．People can cope with the negative emotions in life.

单项选择题

In many countries, governments are trying to get citizens to eat more healthily. One way in which governments are trying to do this is by increasing taxes on foods that are unhealthy. For example, Denmark, a country in Europe, taxes products that contain a lot of sugar, such as ice cream and chocolate. In 2011, the Danish government went one step further and introduced a tax on the fats contained in foods like butter and cheese. However, experts do not agree whether such taxes work. Some health experts have always disagreed with taxing fats. They say we need to consider each food separately and not simply worry about how much fat it contains. For the same reason, Danish dairy farmers felt that the government was wrong to say that the foods they produce are unhealthy. Cheese, for example, contains a lot of fat, but it does not seem to lead to health problems in the way other kinds of fat do. Such critics believe that the government should instead try to make healthy foods, such as vegetables, cheaper. There have also been economic problems because of the tax. The Danish government thought that if the cost of fatty foods went up, people would not buy as much of them. However, some foods such as butter and cheese are an important part of the traditional Danish diet. Since these could not be bought in Denmark at reasonable prices, many Danish people began shopping in nearby countries. One study discovered that as many as 48 percent of Danish people were going to Germany or Sweden to do shopping, and the Danish economy lost about $1.8 billion because of this. For these reasons, the Danish government decided to get rid of the tax after only one year. However, many doctors say that one year is not long enough to know if the tax helped Danish citizens’ health. They claim that the Danish government is worried more about the economy than it is about the Danish people. But even though the tax did not work in Denmark, some countries have not given up on the idea. The United Kingdom and France are thinking of trying similar taxes, and Hungary has already put a tax on fatty foods.What was one result of taxing foods that have a lot of fat

A．Many people avoided paying the tax by shopping abroad.
B．Many people began eating traditional Danish food.
C．It made healthy foods like fruit and vegetable cost more.
D．It caused people in Germany and Sweden to spend less money.

单项选择题

By "some people" I mean me. Why is it that an evening stroll(散步) leaves me feeling eaten alive while my companions are left blissfully un-bitten Studies suggest that about 20 percent of people are "high attractor types" who are especially appealing to the female mosquitoes (蚊子) seeking out blood for the extra protein (蛋白质) they need to lay eggs. Of course, not all mosquitoes are the same. But let’ s consider some of the more general properties that affect your mosquito appeal. Clothing Color It’s true, mosquitoes have discerning(有辨识能力的) fashion taste. Or at least, they’ re more likely to spot you as a target if you stand out from your environment. Dark colors, especially, will attract more of the insect. Body Heat Visual clues allow the mosquito to locate you from relatively far away, but as she approaches, it’ s your body heat that draws her in. This puts pregnant women, who average about 1. 26 degrees Fahrenheit (华氏温度) warmer than others, at a particular risk—a fact which has been substantiated (证实) by a number of studies. Carbon Dioxide This is another reason pregnant women are at a disadvantage. Mosquitoes can detect carbon dioxide using a special organ called a maxillary palp (下颚须) from as far as 164 feet away. Unfortunately for mothers-to-be, pregnancy causes women to emit 21 percent more CO ₂ . This is also why kids are often safe from bites, when bigger, more CO ₂ -emitting adults are around. Alcohol Intake On the flip side(另一方面) , pregnant women are (presumably) avoiding another mosquito attractor: alcohol. Although it’ s unclear how mosquitoes go about detecting the presence of ethanol(乙醇), studies show that drinking even just 12 ounces of beer will significantly increase the attention you receive from the pests. The Properties of Your Skin and Sweat Up to 85 percent of your susceptibility(敏感性) to mosquito bites has nothing to do with what you’re drinking, wearing or how much heat your body emits—it’ s just genetic. Specifically, the composition of your skin bacteria—the kind that naturally and healthily exists there—can serve as an attractor. Blood Type Another factor you can ’ t control Your blood type. And it stands to reason that, if the mosquito is there to suck your blood, she cares what kind she’ s getting. People with blood type O are more prone to mosquito bites than those with type B, with type A folks bringing up the rear.What is the best title for this passage

A．Properties That Affect Your Mosquito Appeal
B．Why Pregnant Women Attract Mosquitoes Easily
C．Your Gene Make You More Attractive to Mosquitoes
D．Why Are Some People More Prone to Mosquito Bites

单项选择题

It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modern ways: that they are possessive and dominant: that they do not trust their children to deal with crises: that they talk too much about certain problems—and that they have no sense of humor, at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste. Sometimes you are resistant and proud because you do not want your parents to approve of what you do. If they did approve, it looks as if you are betraying your own age group. But in that case, you are assuming that you are underdog(失败者) : you can’t win but at least you can keep your honor. This is a passive way of looking at things. It is natural enough after long years of childhood, when you were completely under your parents’ control. But it ignores the fact that you are now beginning to be responsible for yourself. If you plan to control your life, co-operation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.Teenagers do not want their parents to approve of whatever they do because they______.

A．have a desire to be independent
B．feel that they are superior in a small way to the adults
C．are not likely to win over the adults
D．have already been accepted into the adult world

单项选择题

According to psychologists(心理学家) , an emotion is aroused when a man or animal views something as either bad or good. When a person feels like running away from something he thinks will hurt him, we call this emotion fear. If the person wants to remove the danger by attacking it, we call the emotion anger. The emotions of joy and love are aroused when we think something can help us. An emotion does not have to be created by something in the outside world. It can be created by a person’ s thoughts. Everyone has emotions. Many psychologists believe that infants are born without emotions. They believe children learn emotions just as they learn to read and write. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion. Psychologists think that there are two types of emotions: positive and negative. Positive emotions include love, liking, joy, delight and hope. They are aroused by something that appeals to a person. Negative emotions make a person unhappy or dissatisfied. They include anger, fear, despair, sadness and disgust. In growing up, a person learns to cope with the negative emotions in order to be happy. Emotions may be weak or strong. Some strong emotions are so unpleasant that a person will try any means to escape from them. In order to feel happy, the person may choose unusual ways to avoid the emotion. Strong emotions can make it hard to think and to solve problems. They may prevent a person from learning or paying attention to what he is doing. For example, a student taking an examination may be so worried about failing that he cannot think properly. The worry drains valuable mental energy he needs for the examination.The author’s purpose of writing this passage is to______.

A．explain why people have emotions
B．show how people avoid the negative emotions
C．explain what people should do before emotions
D．define and classify people’s emotions

单项选择题

In many countries, governments are trying to get citizens to eat more healthily. One way in which governments are trying to do this is by increasing taxes on foods that are unhealthy. For example, Denmark, a country in Europe, taxes products that contain a lot of sugar, such as ice cream and chocolate. In 2011, the Danish government went one step further and introduced a tax on the fats contained in foods like butter and cheese. However, experts do not agree whether such taxes work. Some health experts have always disagreed with taxing fats. They say we need to consider each food separately and not simply worry about how much fat it contains. For the same reason, Danish dairy farmers felt that the government was wrong to say that the foods they produce are unhealthy. Cheese, for example, contains a lot of fat, but it does not seem to lead to health problems in the way other kinds of fat do. Such critics believe that the government should instead try to make healthy foods, such as vegetables, cheaper. There have also been economic problems because of the tax. The Danish government thought that if the cost of fatty foods went up, people would not buy as much of them. However, some foods such as butter and cheese are an important part of the traditional Danish diet. Since these could not be bought in Denmark at reasonable prices, many Danish people began shopping in nearby countries. One study discovered that as many as 48 percent of Danish people were going to Germany or Sweden to do shopping, and the Danish economy lost about $1.8 billion because of this. For these reasons, the Danish government decided to get rid of the tax after only one year. However, many doctors say that one year is not long enough to know if the tax helped Danish citizens’ health. They claim that the Danish government is worried more about the economy than it is about the Danish people. But even though the tax did not work in Denmark, some countries have not given up on the idea. The United Kingdom and France are thinking of trying similar taxes, and Hungary has already put a tax on fatty foods.Many doctors think that the Danish government ______.

A．could have ended the tax on fats much sooner
B．is more concerned about money than the health of its citizens
C．has enough information to see if taxes on unhealthy foods are effective
D．should ask other countries to make laws against selling fatty foods

单项选择题

By "some people" I mean me. Why is it that an evening stroll(散步) leaves me feeling eaten alive while my companions are left blissfully un-bitten Studies suggest that about 20 percent of people are "high attractor types" who are especially appealing to the female mosquitoes (蚊子) seeking out blood for the extra protein (蛋白质) they need to lay eggs. Of course, not all mosquitoes are the same. But let’ s consider some of the more general properties that affect your mosquito appeal. Clothing Color It’s true, mosquitoes have discerning(有辨识能力的) fashion taste. Or at least, they’ re more likely to spot you as a target if you stand out from your environment. Dark colors, especially, will attract more of the insect. Body Heat Visual clues allow the mosquito to locate you from relatively far away, but as she approaches, it’ s your body heat that draws her in. This puts pregnant women, who average about 1. 26 degrees Fahrenheit (华氏温度) warmer than others, at a particular risk—a fact which has been substantiated (证实) by a number of studies. Carbon Dioxide This is another reason pregnant women are at a disadvantage. Mosquitoes can detect carbon dioxide using a special organ called a maxillary palp (下颚须) from as far as 164 feet away. Unfortunately for mothers-to-be, pregnancy causes women to emit 21 percent more CO ₂ . This is also why kids are often safe from bites, when bigger, more CO ₂ -emitting adults are around. Alcohol Intake On the flip side(另一方面) , pregnant women are (presumably) avoiding another mosquito attractor: alcohol. Although it’ s unclear how mosquitoes go about detecting the presence of ethanol(乙醇), studies show that drinking even just 12 ounces of beer will significantly increase the attention you receive from the pests. The Properties of Your Skin and Sweat Up to 85 percent of your susceptibility(敏感性) to mosquito bites has nothing to do with what you’re drinking, wearing or how much heat your body emits—it’ s just genetic. Specifically, the composition of your skin bacteria—the kind that naturally and healthily exists there—can serve as an attractor. Blood Type Another factor you can ’ t control Your blood type. And it stands to reason that, if the mosquito is there to suck your blood, she cares what kind she’ s getting. People with blood type O are more prone to mosquito bites than those with type B, with type A folks bringing up the rear.Which statement is NOT true according to the author

A．People with blood type A are more attractive than those with type O.
B．Take baths more often lower the risks of mosquito biting.
C．Kids get less bites because they emit less CO ₂ .
D．The author is among the "high attractor types".

单项选择题

It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modern ways: that they are possessive and dominant: that they do not trust their children to deal with crises: that they talk too much about certain problems—and that they have no sense of humor, at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste. Sometimes you are resistant and proud because you do not want your parents to approve of what you do. If they did approve, it looks as if you are betraying your own age group. But in that case, you are assuming that you are underdog(失败者) : you can’t win but at least you can keep your honor. This is a passive way of looking at things. It is natural enough after long years of childhood, when you were completely under your parents’ control. But it ignores the fact that you are now beginning to be responsible for yourself. If you plan to control your life, co-operation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.To improve parent-child relationships, teenagers are advised to be______.

A．obedient
B．responsible
C．independent
D．co-operative

单项选择题

According to psychologists(心理学家) , an emotion is aroused when a man or animal views something as either bad or good. When a person feels like running away from something he thinks will hurt him, we call this emotion fear. If the person wants to remove the danger by attacking it, we call the emotion anger. The emotions of joy and love are aroused when we think something can help us. An emotion does not have to be created by something in the outside world. It can be created by a person’ s thoughts. Everyone has emotions. Many psychologists believe that infants are born without emotions. They believe children learn emotions just as they learn to read and write. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion. Psychologists think that there are two types of emotions: positive and negative. Positive emotions include love, liking, joy, delight and hope. They are aroused by something that appeals to a person. Negative emotions make a person unhappy or dissatisfied. They include anger, fear, despair, sadness and disgust. In growing up, a person learns to cope with the negative emotions in order to be happy. Emotions may be weak or strong. Some strong emotions are so unpleasant that a person will try any means to escape from them. In order to feel happy, the person may choose unusual ways to avoid the emotion. Strong emotions can make it hard to think and to solve problems. They may prevent a person from learning or paying attention to what he is doing. For example, a student taking an examination may be so worried about failing that he cannot think properly. The worry drains valuable mental energy he needs for the examination.We can safely conclude that a student may fail in an exam if______.

A．he cannot think properly
B．he can’ t pay attention to it
C．he is not worried
D．he is not full of energy

单项选择题

In many countries, governments are trying to get citizens to eat more healthily. One way in which governments are trying to do this is by increasing taxes on foods that are unhealthy. For example, Denmark, a country in Europe, taxes products that contain a lot of sugar, such as ice cream and chocolate. In 2011, the Danish government went one step further and introduced a tax on the fats contained in foods like butter and cheese. However, experts do not agree whether such taxes work. Some health experts have always disagreed with taxing fats. They say we need to consider each food separately and not simply worry about how much fat it contains. For the same reason, Danish dairy farmers felt that the government was wrong to say that the foods they produce are unhealthy. Cheese, for example, contains a lot of fat, but it does not seem to lead to health problems in the way other kinds of fat do. Such critics believe that the government should instead try to make healthy foods, such as vegetables, cheaper. There have also been economic problems because of the tax. The Danish government thought that if the cost of fatty foods went up, people would not buy as much of them. However, some foods such as butter and cheese are an important part of the traditional Danish diet. Since these could not be bought in Denmark at reasonable prices, many Danish people began shopping in nearby countries. One study discovered that as many as 48 percent of Danish people were going to Germany or Sweden to do shopping, and the Danish economy lost about $1.8 billion because of this. For these reasons, the Danish government decided to get rid of the tax after only one year. However, many doctors say that one year is not long enough to know if the tax helped Danish citizens’ health. They claim that the Danish government is worried more about the economy than it is about the Danish people. But even though the tax did not work in Denmark, some countries have not given up on the idea. The United Kingdom and France are thinking of trying similar taxes, and Hungary has already put a tax on fatty foods.Which of the following statements is true

A．Some people think that making healthy foods cheaper would work better than a tax.
B．Health experts say that we should eat more dairy products than other foods.
C．Some kinds of fruit and vegetables are as unhealthy as meat.
D．Many people buy unhealthy foods to avoid paying high taxes.

单项选择题

According to psychologists(心理学家) , an emotion is aroused when a man or animal views something as either bad or good. When a person feels like running away from something he thinks will hurt him, we call this emotion fear. If the person wants to remove the danger by attacking it, we call the emotion anger. The emotions of joy and love are aroused when we think something can help us. An emotion does not have to be created by something in the outside world. It can be created by a person’ s thoughts. Everyone has emotions. Many psychologists believe that infants are born without emotions. They believe children learn emotions just as they learn to read and write. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion. Psychologists think that there are two types of emotions: positive and negative. Positive emotions include love, liking, joy, delight and hope. They are aroused by something that appeals to a person. Negative emotions make a person unhappy or dissatisfied. They include anger, fear, despair, sadness and disgust. In growing up, a person learns to cope with the negative emotions in order to be happy. Emotions may be weak or strong. Some strong emotions are so unpleasant that a person will try any means to escape from them. In order to feel happy, the person may choose unusual ways to avoid the emotion. Strong emotions can make it hard to think and to solve problems. They may prevent a person from learning or paying attention to what he is doing. For example, a student taking an examination may be so worried about failing that he cannot think properly. The worry drains valuable mental energy he needs for the examination.As used in the last sentence, the word "drains" probably means______.

A．helps
B．ties
C．weakens
D．strengthens