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Psychologist George Spilich in Maryland College decided to find out whether, as many smokers say, smoking helps them to "think and concentrate". Spilich put young non-smokers, active smokers and smokers deprived(被剥夺) of cigarettes through a series of tests.In the first test, each subject(试验对象) sat before a computer screen and pressed a key as soon as he or she recognized a target letter among a group of 96. In this simple test, smokers, deprived smokers and nonsmokers performed equally well.The next test was more complex, requiring all to scan sequences of 20 identical letters and respond the instant one of the letters transformed into a different one. Non-smokers were the fast, but under the stimulation of nicotine(尼古丁), active smokers were faster than deprived smokers.In the third test of short-term memory, non-smokers made the fewest errors, but deprived smokers committed fewer errors than active smokers.The fourth test required people to read a passage, then answer questions about it. Nonsmokers remembered 19 percent more of the most important information than active smokers, and deprived smokers bested those who had smoked a cigarette just before testing. Active smokers tended not only to have poorer memories but also had trouble separating important information from insignificant details."As our tests became more complex," sums up Spilich, "non-smokers performed better than smokers by wider and wider margins. " He predicts, "smokers might perform adequately at many jobs until they got complicated. A smoking airline pilot could fly adequately if no problems arose, but if something went wrong, smoking might damage his mental capacity. \ Which of the following statement is true()

Active smokers in general performed better than deprived smokers.
B. Active smokers responded more quickly than the other subjects.
C. Non-smokers were not better than other subjects in performing simple tests.
Deprived smokers gave the slowest responses to the various tasks.

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Psychologist George Spilich in Maryland College decided to find out whether, as many smokers say, smoking helps them to "think and concentrate". Spilich put young non-smokers, active smokers and smokers deprived(被剥夺) of cigarettes through a series of tests.In the first test, each subject(试验对象) sat before a computer screen and pressed a key as soon as he or she recognized a target letter among a group of 96. In this simple test, smokers, deprived smokers and nonsmokers performed equally well.The next test was more complex, requiring all to scan sequences of 20 identical letters and respond the instant one of the letters transformed into a different one. Non-smokers were the fast, but under the stimulation of nicotine(尼古丁), active smokers were faster than deprived smokers.In the third test of short-term memory, non-smokers made the fewest errors, but deprived smokers committed fewer errors than active smokers.The fourth test required people to read a passage, then answer questions about it. Nonsmokers remembered 19 percent more of the most important information than active smokers, and deprived smokers bested those who had smoked a cigarette just before testing. Active smokers tended not only to have poorer memories but also had trouble separating important information from insignificant details."As our tests became more complex," sums up Spilich, "non-smokers performed better than smokers by wider and wider margins. " He predicts, "smokers might perform adequately at many jobs until they got complicated. A smoking airline pilot could fly adequately if no problems arose, but if something went wrong, smoking might damage his mental capacity. \ We can infer from the last paragraph that()

A. smokers should not expect to become airline pilots
B. smoking in emergency cases causes mental illness
C. no airline pilots smoke during flights
D. smokers may prove unequal to handling emergency cases

[听力原文]11-15Do you have a tough math test coming up Then listen to some (Q11) classical piano music just before the test. You might come up with a higher score. Researchers at a university in California conducted an experiment. They asked a group of college students to listen to some piano music by a famous 18th century composer before taking a math test. They were surprised to find that the students’(Q13) scores jumped 8 to 9 points. The music seems to (Q12)excite nerve activities in the brain, similar to the activity that occurs when a person is figuring out a math problem.However, the scientists warn before you get too excited about applying this method to your math lest, you should remember that brain exciting effects(Q14)last only 10 or 15 minutes. (Q15)Would rock music work as well as the piano music did No, the scientists say. What is one of the findings of the researchThe effects of music do not()

[听力原文]11-15Do you have a tough math test coming up Then listen to some (Q11) classical piano music just before the test. You might come up with a higher score. Researchers at a university in California conducted an experiment. They asked a group of college students to listen to some piano music by a famous 18th century composer before taking a math test. They were surprised to find that the students’(Q13) scores jumped 8 to 9 points. The music seems to (Q12)excite nerve activities in the brain, similar to the activity that occurs when a person is figuring out a math problem.However, the scientists warn before you get too excited about applying this method to your math lest, you should remember that brain exciting effects(Q14)last only 10 or 15 minutes. (Q15)Would rock music work as well as the piano music did No, the scientists say. How many did the students’ scores jumpThe students’ scores jumped ______points.

[听力原文]11-15Do you have a tough math test coming up Then listen to some (Q11) classical piano music just before the test. You might come up with a higher score. Researchers at a university in California conducted an experiment. They asked a group of college students to listen to some piano music by a famous 18th century composer before taking a math test. They were surprised to find that the students’(Q13) scores jumped 8 to 9 points. The music seems to (Q12)excite nerve activities in the brain, similar to the activity that occurs when a person is figuring out a math problem.However, the scientists warn before you get too excited about applying this method to your math lest, you should remember that brain exciting effects(Q14)last only 10 or 15 minutes. (Q15)Would rock music work as well as the piano music did No, the scientists say. Why can classical music play a positive role in problem solvingThe music seems to excite()in the brain.

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