• 搜标题
  • 搜题干
  • 搜选项
0 / 200字
单项选择题


下面有3篇短文，每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。
第一篇
Narcotic Addiction (麻醉品依赖)
Heroin(海洛因)addiction today is found chiefly among young people in ghetto areas(贫农区) , of the more than 60,000 known addicts, more than half live in New York State. Most of these live in New York City. Recent figures show that more than half of the addicts are less than 30 years of age.
Narcotic(麻醉剂)addiction in the United States is not limited to heroin users. Some middle-aged and older persons who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses and druggists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main objective of their lives. His concentration on getting drugs often prevents .the addict from continuing his education or his job. His health is often poor. He may be sick one day from effects of withdrawal(撤退，这里指不吸毒) and sick the next from an overdose(吸毒过量). Statistics show that his life span(寿命) may be shorted by 15～20 years. He is usually in trouble with his family and almost always in trouble with the law.
Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted. Once addicted, they may even become more involved with crime because it costs so much to support the heroin habit.
Most authorities agree that the addict’s involvement with crime is not a direct effect of the drug itself. Turning to crime is usually the only way he has of getting that much money. His crimes are always thefts or other crimes against property.
Federal penalties for illegal usage of narcotics were established under the Harrison Act(哈里森法案令) of 1914. The Act provides(规定) that illegal possession of narcotics is punished by fines or imprisonment. Sentences can range from 2～10 years for further offences.
Illegal sale of narcotics can mean a fine of $ 20,000 and a sentence from 20～40 years for later offences. A person who sells narcotics to someone under 18 is refused parole(假释)and probation (假释和缓刑), even for the first offences. If the drug is heroin, he can be sentenced to life imprisonment or to death.
A drug addict is always in trouble with law______.

A．because he loses hope in himself
B．because turning to crime is his only way of getting money to buy the expensive drugs
C．because he rebels against the society and does not see things in the lights of reason
D．because he often gets into bad company
题目列表

你可能感兴趣的试题

单项选择题


下面有3篇短文，每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。
第一篇
Narcotic Addiction (麻醉品依赖)
Heroin(海洛因)addiction today is found chiefly among young people in ghetto areas(贫农区) , of the more than 60,000 known addicts, more than half live in New York State. Most of these live in New York City. Recent figures show that more than half of the addicts are less than 30 years of age.
Narcotic(麻醉剂)addiction in the United States is not limited to heroin users. Some middle-aged and older persons who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses and druggists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main objective of their lives. His concentration on getting drugs often prevents .the addict from continuing his education or his job. His health is often poor. He may be sick one day from effects of withdrawal(撤退，这里指不吸毒) and sick the next from an overdose(吸毒过量). Statistics show that his life span(寿命) may be shorted by 15～20 years. He is usually in trouble with his family and almost always in trouble with the law.
Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted. Once addicted, they may even become more involved with crime because it costs so much to support the heroin habit.
Most authorities agree that the addict’s involvement with crime is not a direct effect of the drug itself. Turning to crime is usually the only way he has of getting that much money. His crimes are always thefts or other crimes against property.
Federal penalties for illegal usage of narcotics were established under the Harrison Act(哈里森法案令) of 1914. The Act provides(规定) that illegal possession of narcotics is punished by fines or imprisonment. Sentences can range from 2～10 years for further offences.
Illegal sale of narcotics can mean a fine of $ 20,000 and a sentence from 20～40 years for later offences. A person who sells narcotics to someone under 18 is refused parole(假释)and probation (假释和缓刑), even for the first offences. If the drug is heroin, he can be sentenced to life imprisonment or to death.
Which of the following is NOT mentioned in the first paragraph

A．The biggest state for addicts in the U. S..
B．The age group of drug addicts.
C．The place where most drag addicts live.
D．The cause of drug abuse.
单项选择题

第二篇
The First Navigational Lights
In the New World the first navigational lights were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by "light dues" levied on ships, the original beacon was blown up in 1776. By then there were only a dozen of so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses.
The first eight lighthouses erected on the west coast in the 1850’s featured the same basic new England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most stations in the Northeast were built on rocky eminences, enormous towers were not the rule. Some were made of stone and brick, others of wood or metal. Some stood on pilings or stilts; Some were fastened to rock with iron rods. Farther south, from Maryland through the Florida Keys, the coast was low and sandy, it was often necessary to build tall towers there, massive structures like the majestic Cape Hatteras, North Carolina lighthouse, which was lit in 1870. At 190 feet, is the tallest brick lighthouse in the country.
Notwithstanding differences in appearance and construction, most American lighthouses shared several features: a light, living quarters and sometimes a bell (later, a foghorn). They also had something else in common, a keeper and usually, the keeper’s family. The keeper’s essential task was trimming the lantern wick in order to maintain a steady, bright flame. The earliest keepers came from every walk of life ; they were seamen, farmers, mechanics, rough mill hands and appointments were often handed out by local customs commissioners as political plums. After the administration of lighthouses was taken over in 1852 by the United States Lighthouse Board, an agency of the Treasury Department, the keeper gradually became highly professional.
What is the best title for this passage

A．The Life of a Lighthouse Keeper
B．The Modern Profession of Lighthouse Keeping
C．Early Lighthouse in the Unites States
D．The Lighthouse on Little Brewster Island
单项选择题

第三篇
Ways to Create Colors in a Photograph
There are two ways to create colors in a photograph. One method called additive, starts with three basic colors and adds them together to produce some other color. The second method called subtractive, starts with white light(a mixture of all colors in the spectrum(光谱) )and by taking away some or all other colors, leaves the one desired.
In the additive method, separate colored lights combine to produce various other colors. The three additive primary colors are green, red and blue (each providing about one-third of the wavelengths in the total spectrum). Mixed in varying proportions, they can produce all colors. Green and red light mix to produce yellow, red and blue light mix to produce magenta ( a purplish pink) ; green and blue mix to produce cyan ( a bluish green). When equal parts of all three of these primary-colored beams of light overlap(重叠), the mixture appears white to the eye.
In the subtractive process colors are produced when dye(染料) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan, magenta and yellow; these primaries or dyes absorb red, green and blue wavelengths respectively, thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined, the subtractive primaries can absorb all colors of light, producing black. But, mixed in varying proportions, they also can produce any color in the spectrum.
Whether 3 particular colors is obtained by adding colored lights together or by subtracting some light from the total spectrum, the result looks the same to the eye. The additive process was employed for early color photography. But the subtractive method, while requiring complex chemical techniques, has turned out to be more practical and is the basis of all modern color films.
What does the passage mainly discuss

A．Recent developments in camera technology.
B．How to make white light.
C．The additive and subtractive methods of producing color.
D．The discovery of the spectrum.
单项选择题

第二篇
The First Navigational Lights
In the New World the first navigational lights were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by "light dues" levied on ships, the original beacon was blown up in 1776. By then there were only a dozen of so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses.
The first eight lighthouses erected on the west coast in the 1850’s featured the same basic new England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most stations in the Northeast were built on rocky eminences, enormous towers were not the rule. Some were made of stone and brick, others of wood or metal. Some stood on pilings or stilts; Some were fastened to rock with iron rods. Farther south, from Maryland through the Florida Keys, the coast was low and sandy, it was often necessary to build tall towers there, massive structures like the majestic Cape Hatteras, North Carolina lighthouse, which was lit in 1870. At 190 feet, is the tallest brick lighthouse in the country.
Notwithstanding differences in appearance and construction, most American lighthouses shared several features: a light, living quarters and sometimes a bell (later, a foghorn). They also had something else in common, a keeper and usually, the keeper’s family. The keeper’s essential task was trimming the lantern wick in order to maintain a steady, bright flame. The earliest keepers came from every walk of life ; they were seamen, farmers, mechanics, rough mill hands and appointments were often handed out by local customs commissioners as political plums. After the administration of lighthouses was taken over in 1852 by the United States Lighthouse Board, an agency of the Treasury Department, the keeper gradually became highly professional.
Why does the author mention the Massachusetts Bay Colony

A．The first lantern wicks were developed there.
B．It was tile headquarters of the United States Lighthouse Board.
C．Many of the tallest lighthouses were built there.
D．The first lighthouse in North America was built there.
单项选择题


下面有3篇短文，每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。
第一篇
Narcotic Addiction (麻醉品依赖)
Heroin(海洛因)addiction today is found chiefly among young people in ghetto areas(贫农区) , of the more than 60,000 known addicts, more than half live in New York State. Most of these live in New York City. Recent figures show that more than half of the addicts are less than 30 years of age.
Narcotic(麻醉剂)addiction in the United States is not limited to heroin users. Some middle-aged and older persons who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses and druggists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main objective of their lives. His concentration on getting drugs often prevents .the addict from continuing his education or his job. His health is often poor. He may be sick one day from effects of withdrawal(撤退，这里指不吸毒) and sick the next from an overdose(吸毒过量). Statistics show that his life span(寿命) may be shorted by 15～20 years. He is usually in trouble with his family and almost always in trouble with the law.
Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted. Once addicted, they may even become more involved with crime because it costs so much to support the heroin habit.
Most authorities agree that the addict’s involvement with crime is not a direct effect of the drug itself. Turning to crime is usually the only way he has of getting that much money. His crimes are always thefts or other crimes against property.
Federal penalties for illegal usage of narcotics were established under the Harrison Act(哈里森法案令) of 1914. The Act provides(规定) that illegal possession of narcotics is punished by fines or imprisonment. Sentences can range from 2～10 years for further offences.
Illegal sale of narcotics can mean a fine of $ 20,000 and a sentence from 20～40 years for later offences. A person who sells narcotics to someone under 18 is refused parole(假释)and probation (假释和缓刑), even for the first offences. If the drug is heroin, he can be sentenced to life imprisonment or to death.
We can infer from the second paragraph that______.

A．some people become addicted to drug unintentionally
B．patients are likely to become addicts
C．most drug addicts are those who are in the medical profession
D．people over 30 years old are immune to drug abuse
单项选择题

第三篇
Ways to Create Colors in a Photograph
There are two ways to create colors in a photograph. One method called additive, starts with three basic colors and adds them together to produce some other color. The second method called subtractive, starts with white light(a mixture of all colors in the spectrum(光谱) )and by taking away some or all other colors, leaves the one desired.
In the additive method, separate colored lights combine to produce various other colors. The three additive primary colors are green, red and blue (each providing about one-third of the wavelengths in the total spectrum). Mixed in varying proportions, they can produce all colors. Green and red light mix to produce yellow, red and blue light mix to produce magenta ( a purplish pink) ; green and blue mix to produce cyan ( a bluish green). When equal parts of all three of these primary-colored beams of light overlap(重叠), the mixture appears white to the eye.
In the subtractive process colors are produced when dye(染料) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan, magenta and yellow; these primaries or dyes absorb red, green and blue wavelengths respectively, thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined, the subtractive primaries can absorb all colors of light, producing black. But, mixed in varying proportions, they also can produce any color in the spectrum.
Whether 3 particular colors is obtained by adding colored lights together or by subtracting some light from the total spectrum, the result looks the same to the eye. The additive process was employed for early color photography. But the subtractive method, while requiring complex chemical techniques, has turned out to be more practical and is the basis of all modern color films.
It can be inferred from the passage that white can be produced by______.

A．mixing different proportions of magenta, green and red
B．mixing equal proportions of green, red and blue
C．mixing different proportions of cyan, yellow and blue
D．mixing equal proportions of black, red and green
单项选择题


下面有3篇短文，每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。
第一篇
Narcotic Addiction (麻醉品依赖)
Heroin(海洛因)addiction today is found chiefly among young people in ghetto areas(贫农区) , of the more than 60,000 known addicts, more than half live in New York State. Most of these live in New York City. Recent figures show that more than half of the addicts are less than 30 years of age.
Narcotic(麻醉剂)addiction in the United States is not limited to heroin users. Some middle-aged and older persons who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses and druggists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main objective of their lives. His concentration on getting drugs often prevents .the addict from continuing his education or his job. His health is often poor. He may be sick one day from effects of withdrawal(撤退，这里指不吸毒) and sick the next from an overdose(吸毒过量). Statistics show that his life span(寿命) may be shorted by 15～20 years. He is usually in trouble with his family and almost always in trouble with the law.
Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted. Once addicted, they may even become more involved with crime because it costs so much to support the heroin habit.
Most authorities agree that the addict’s involvement with crime is not a direct effect of the drug itself. Turning to crime is usually the only way he has of getting that much money. His crimes are always thefts or other crimes against property.
Federal penalties for illegal usage of narcotics were established under the Harrison Act(哈里森法案令) of 1914. The Act provides(规定) that illegal possession of narcotics is punished by fines or imprisonment. Sentences can range from 2～10 years for further offences.
Illegal sale of narcotics can mean a fine of $ 20,000 and a sentence from 20～40 years for later offences. A person who sells narcotics to someone under 18 is refused parole(假释)and probation (假释和缓刑), even for the first offences. If the drug is heroin, he can be sentenced to life imprisonment or to death.
According to the author, which of the following is the main objective of a drug addict

A．Quitting drugs.
B．Getting financial help.
C．Having drug all the time.
D．Spiritual comfort.
单项选择题

第三篇
Ways to Create Colors in a Photograph
There are two ways to create colors in a photograph. One method called additive, starts with three basic colors and adds them together to produce some other color. The second method called subtractive, starts with white light(a mixture of all colors in the spectrum(光谱) )and by taking away some or all other colors, leaves the one desired.
In the additive method, separate colored lights combine to produce various other colors. The three additive primary colors are green, red and blue (each providing about one-third of the wavelengths in the total spectrum). Mixed in varying proportions, they can produce all colors. Green and red light mix to produce yellow, red and blue light mix to produce magenta ( a purplish pink) ; green and blue mix to produce cyan ( a bluish green). When equal parts of all three of these primary-colored beams of light overlap(重叠), the mixture appears white to the eye.
In the subtractive process colors are produced when dye(染料) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan, magenta and yellow; these primaries or dyes absorb red, green and blue wavelengths respectively, thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined, the subtractive primaries can absorb all colors of light, producing black. But, mixed in varying proportions, they also can produce any color in the spectrum.
Whether 3 particular colors is obtained by adding colored lights together or by subtracting some light from the total spectrum, the result looks the same to the eye. The additive process was employed for early color photography. But the subtractive method, while requiring complex chemical techniques, has turned out to be more practical and is the basis of all modern color films.
What color filter would absorb red wavelengths

A．Red.
B．Magenta.
C．Cyan.
D．Yellow.
单项选择题

第二篇
The First Navigational Lights
In the New World the first navigational lights were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by "light dues" levied on ships, the original beacon was blown up in 1776. By then there were only a dozen of so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses.
The first eight lighthouses erected on the west coast in the 1850’s featured the same basic new England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most stations in the Northeast were built on rocky eminences, enormous towers were not the rule. Some were made of stone and brick, others of wood or metal. Some stood on pilings or stilts; Some were fastened to rock with iron rods. Farther south, from Maryland through the Florida Keys, the coast was low and sandy, it was often necessary to build tall towers there, massive structures like the majestic Cape Hatteras, North Carolina lighthouse, which was lit in 1870. At 190 feet, is the tallest brick lighthouse in the country.
Notwithstanding differences in appearance and construction, most American lighthouses shared several features: a light, living quarters and sometimes a bell (later, a foghorn). They also had something else in common, a keeper and usually, the keeper’s family. The keeper’s essential task was trimming the lantern wick in order to maintain a steady, bright flame. The earliest keepers came from every walk of life ; they were seamen, farmers, mechanics, rough mill hands and appointments were often handed out by local customs commissioners as political plums. After the administration of lighthouses was taken over in 1852 by the United States Lighthouse Board, an agency of the Treasury Department, the keeper gradually became highly professional.
It may be inferred from the passage that lighthouses in the Northeast did not need high towers because______.

A．the coast was straight and unobstructed
B．ships there had high masts
C．coastal waters were safe
D．the lighthouses were bulb on high Places
单项选择题


下面有3篇短文，每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。
第一篇
Narcotic Addiction (麻醉品依赖)
Heroin(海洛因)addiction today is found chiefly among young people in ghetto areas(贫农区) , of the more than 60,000 known addicts, more than half live in New York State. Most of these live in New York City. Recent figures show that more than half of the addicts are less than 30 years of age.
Narcotic(麻醉剂)addiction in the United States is not limited to heroin users. Some middle-aged and older persons who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses and druggists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main objective of their lives. His concentration on getting drugs often prevents .the addict from continuing his education or his job. His health is often poor. He may be sick one day from effects of withdrawal(撤退，这里指不吸毒) and sick the next from an overdose(吸毒过量). Statistics show that his life span(寿命) may be shorted by 15～20 years. He is usually in trouble with his family and almost always in trouble with the law.
Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted. Once addicted, they may even become more involved with crime because it costs so much to support the heroin habit.
Most authorities agree that the addict’s involvement with crime is not a direct effect of the drug itself. Turning to crime is usually the only way he has of getting that much money. His crimes are always thefts or other crimes against property.
Federal penalties for illegal usage of narcotics were established under the Harrison Act(哈里森法案令) of 1914. The Act provides(规定) that illegal possession of narcotics is punished by fines or imprisonment. Sentences can range from 2～10 years for further offences.
Illegal sale of narcotics can mean a fine of $ 20,000 and a sentence from 20～40 years for later offences. A person who sells narcotics to someone under 18 is refused parole(假释)and probation (假释和缓刑), even for the first offences. If the drug is heroin, he can be sentenced to life imprisonment or to death.
A student who becomes addicted to drugs may______.

A．cheat in the examinations
B．daydream in the class
C．drop out of school
D．lose confidence in himself
单项选择题

第三篇
Ways to Create Colors in a Photograph
There are two ways to create colors in a photograph. One method called additive, starts with three basic colors and adds them together to produce some other color. The second method called subtractive, starts with white light(a mixture of all colors in the spectrum(光谱) )and by taking away some or all other colors, leaves the one desired.
In the additive method, separate colored lights combine to produce various other colors. The three additive primary colors are green, red and blue (each providing about one-third of the wavelengths in the total spectrum). Mixed in varying proportions, they can produce all colors. Green and red light mix to produce yellow, red and blue light mix to produce magenta ( a purplish pink) ; green and blue mix to produce cyan ( a bluish green). When equal parts of all three of these primary-colored beams of light overlap(重叠), the mixture appears white to the eye.
In the subtractive process colors are produced when dye(染料) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan, magenta and yellow; these primaries or dyes absorb red, green and blue wavelengths respectively, thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined, the subtractive primaries can absorb all colors of light, producing black. But, mixed in varying proportions, they also can produce any color in the spectrum.
Whether 3 particular colors is obtained by adding colored lights together or by subtracting some light from the total spectrum, the result looks the same to the eye. The additive process was employed for early color photography. But the subtractive method, while requiring complex chemical techniques, has turned out to be more practical and is the basis of all modern color films.
Which of the following is NOT a pair of additive and subtractive primary colors

A．Yellow and blue.
B．Magenta and green.
C．Black and white.
D．Cyan and red.
单项选择题


下面有3篇短文，每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。
第一篇
Narcotic Addiction (麻醉品依赖)
Heroin(海洛因)addiction today is found chiefly among young people in ghetto areas(贫农区) , of the more than 60,000 known addicts, more than half live in New York State. Most of these live in New York City. Recent figures show that more than half of the addicts are less than 30 years of age.
Narcotic(麻醉剂)addiction in the United States is not limited to heroin users. Some middle-aged and older persons who take narcotic drugs regularly to relieve pain can also become addicted. So do some people who can get drugs easily, such as doctors, nurses and druggists. Studies show that this type of addict has personality and emotional problems very similar to those of other regular narcotic users.
Many addicts admit that getting a continued supply is the main objective of their lives. His concentration on getting drugs often prevents .the addict from continuing his education or his job. His health is often poor. He may be sick one day from effects of withdrawal(撤退，这里指不吸毒) and sick the next from an overdose(吸毒过量). Statistics show that his life span(寿命) may be shorted by 15～20 years. He is usually in trouble with his family and almost always in trouble with the law.
Some studies suggest that many of the known narcotic addicts had some trouble with the law before they became addicted. Once addicted, they may even become more involved with crime because it costs so much to support the heroin habit.
Most authorities agree that the addict’s involvement with crime is not a direct effect of the drug itself. Turning to crime is usually the only way he has of getting that much money. His crimes are always thefts or other crimes against property.
Federal penalties for illegal usage of narcotics were established under the Harrison Act(哈里森法案令) of 1914. The Act provides(规定) that illegal possession of narcotics is punished by fines or imprisonment. Sentences can range from 2～10 years for further offences.
Illegal sale of narcotics can mean a fine of $ 20,000 and a sentence from 20～40 years for later offences. A person who sells narcotics to someone under 18 is refused parole(假释)and probation (假释和缓刑), even for the first offences. If the drug is heroin, he can be sentenced to life imprisonment or to death.
A drug addict is always in trouble with law______.

A．because he loses hope in himself
B．because turning to crime is his only way of getting money to buy the expensive drugs
C．because he rebels against the society and does not see things in the lights of reason
D．because he often gets into bad company
单项选择题

第三篇
Ways to Create Colors in a Photograph
There are two ways to create colors in a photograph. One method called additive, starts with three basic colors and adds them together to produce some other color. The second method called subtractive, starts with white light(a mixture of all colors in the spectrum(光谱) )and by taking away some or all other colors, leaves the one desired.
In the additive method, separate colored lights combine to produce various other colors. The three additive primary colors are green, red and blue (each providing about one-third of the wavelengths in the total spectrum). Mixed in varying proportions, they can produce all colors. Green and red light mix to produce yellow, red and blue light mix to produce magenta ( a purplish pink) ; green and blue mix to produce cyan ( a bluish green). When equal parts of all three of these primary-colored beams of light overlap(重叠), the mixture appears white to the eye.
In the subtractive process colors are produced when dye(染料) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan, magenta and yellow; these primaries or dyes absorb red, green and blue wavelengths respectively, thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined, the subtractive primaries can absorb all colors of light, producing black. But, mixed in varying proportions, they also can produce any color in the spectrum.
Whether 3 particular colors is obtained by adding colored lights together or by subtracting some light from the total spectrum, the result looks the same to the eye. The additive process was employed for early color photography. But the subtractive method, while requiring complex chemical techniques, has turned out to be more practical and is the basis of all modern color films.
What explanation is given for the use of the subtractive method in modern color films

A．The additive process is still being developed.
B．The subtractive process is more efficient.
C．Subtractive colors are more realistic.
D．Additive chemical techniques are too complex.
单项选择题

第二篇
The First Navigational Lights
In the New World the first navigational lights were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by "light dues" levied on ships, the original beacon was blown up in 1776. By then there were only a dozen of so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses.
The first eight lighthouses erected on the west coast in the 1850’s featured the same basic new England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most stations in the Northeast were built on rocky eminences, enormous towers were not the rule. Some were made of stone and brick, others of wood or metal. Some stood on pilings or stilts; Some were fastened to rock with iron rods. Farther south, from Maryland through the Florida Keys, the coast was low and sandy, it was often necessary to build tall towers there, massive structures like the majestic Cape Hatteras, North Carolina lighthouse, which was lit in 1870. At 190 feet, is the tallest brick lighthouse in the country.
Notwithstanding differences in appearance and construction, most American lighthouses shared several features: a light, living quarters and sometimes a bell (later, a foghorn). They also had something else in common, a keeper and usually, the keeper’s family. The keeper’s essential task was trimming the lantern wick in order to maintain a steady, bright flame. The earliest keepers came from every walk of life ; they were seamen, farmers, mechanics, rough mill hands and appointments were often handed out by local customs commissioners as political plums. After the administration of lighthouses was taken over in 1852 by the United States Lighthouse Board, an agency of the Treasury Department, the keeper gradually became highly professional.
According to the passage, where can the tallest brick lighthouse in the United States be found

A．The Florida Keys.
B．Cape Cod.
C．Cape Hatteras.
D．Little Brewster Island.
单项选择题

第二篇
The First Navigational Lights
In the New World the first navigational lights were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by "light dues" levied on ships, the original beacon was blown up in 1776. By then there were only a dozen of so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses.
The first eight lighthouses erected on the west coast in the 1850’s featured the same basic new England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most stations in the Northeast were built on rocky eminences, enormous towers were not the rule. Some were made of stone and brick, others of wood or metal. Some stood on pilings or stilts; Some were fastened to rock with iron rods. Farther south, from Maryland through the Florida Keys, the coast was low and sandy, it was often necessary to build tall towers there, massive structures like the majestic Cape Hatteras, North Carolina lighthouse, which was lit in 1870. At 190 feet, is the tallest brick lighthouse in the country.
Notwithstanding differences in appearance and construction, most American lighthouses shared several features: a light, living quarters and sometimes a bell (later, a foghorn). They also had something else in common, a keeper and usually, the keeper’s family. The keeper’s essential task was trimming the lantern wick in order to maintain a steady, bright flame. The earliest keepers came from every walk of life ; they were seamen, farmers, mechanics, rough mill hands and appointments were often handed out by local customs commissioners as political plums. After the administration of lighthouses was taken over in 1852 by the United States Lighthouse Board, an agency of the Treasury Department, the keeper gradually became highly professional.
We can know from the passage that the coast of North Carolina is______.

A．rocky eminences
B．high and flat
C．low and sandy
D．high and sandy
微信扫码免费搜题