单项选择题X 纠错
A. An animal’s skin is not really useful to us.
B. Our purposes can be better served.
C. Natural materials are limited.
D. It is difficult to copy natur
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单项选择题
A. It will contihue to warm the globe for many years.
B. It cannot be easily captured and stored.
C. Its emission will increase in the coming years.
D. It cannot be reflected back into the spac
单项选择题
A. there are 1.25 billion smokers worldwide.
B. 88% of people with psychotic disorders are smokers.
C. about 625 million smokers have mental problems.
D. 2.5 billion people have mental problems worldwid
单项选择题
A. structural devices.
B. the best solution to run off.
C. appealing to budget-strapped municipalities.
D. costly.
单项选择题
A. Smoking causes great dangers to the body.
B. Smoking is a good way to soothe anxiety.
C. Smoking probably leads to mental illness.
D. Smoking does not kill smokers.
单项选择题
A. they were given a list of words before sleep.
B. they reached the deepest stages of sleep.
C. they were connected to electrical currents.
D. they were asked to recall the words the next mornin
单项选择题
A. economic growth.
B. providing lifestyles to people.
C. providing energy to people.
D. protecting the environment.
单项选择题
A. marketing and advertising their products.
B. training their employees.
C. hiring consults and programmers.
D. analyzing the data transmitted onto the we
单项选择题
A. He will be able to learn many new skills.
B. He will forget all the information stored in his brain.
C. He will be able to learn things quickly.
D. He will not pick up new information quickly.