【单选题】 The building of the new subway lines in the city has been ______due to lack of enough in- vestment.
A.held up
B.held on
C.held out
D.held back
A.held up
B.held on
C.held out
D.held back
【单选题】Shares on the stock market have ______ as a result of a worldwide economic downturn.
A.turned
B.changed
C.floated
D.fluctuated
A.turned
B.changed
C.floated
D.fluctuated
【单选题】Psychologist George Spilich and colleagues at WashingtonCollege inChestertown, Maryland, 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 grouping 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 was transformed into a different one. Non-smokers were faster, 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. Non-smokers 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.\
George Spilich’s experiment was conducted in such a way as to ______.
A、compel the subjects to separate major information from minor details
B、put the subjects through increasingly complex tests
C、check the effectiveness of nicotine on smokers
D、register the prompt responses of the subjects
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 grouping 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 was transformed into a different one. Non-smokers were faster, 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. Non-smokers 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.\
George Spilich’s experiment was conducted in such a way as to ______.
A、compel the subjects to separate major information from minor details
B、put the subjects through increasingly complex tests
C、check the effectiveness of nicotine on smokers
D、register the prompt responses of the subjects
【单选题】 Tom plunged into the pond immediately when he saw a boat was sinking and a little girl in it was
A.in need
B.on the decline
C.in disorder
D.at stake
A.in need
B.on the decline
C.in disorder
D.at stake
【单选题】 The destruction of the Twin Towers in New York City ______ shock and anger not only throughout America but also throughout the whole world.
A.enveloped
B.summoned
C.tempted
D.provoked
A.enveloped
B.summoned
C.tempted
D.provoked
【单选题】 I'm very glad to know that my boss has generously agreed to ______ my debt in return for certain services.
A.take away
B.cut out
C.write off
D.clear up
A.take away
B.cut out
C.write off
D.clear up
【单选题】 Smuggling is a ______ activity which might bring destruction to our economy; therefore, it must be banned.
A.pertinent
B.fruitful
C.detrimental
D.casual
A.pertinent
B.fruitful
C.detrimental
D.casual
【单选题】According to Paragraph 2 ______.
A. people of higher status are less likely to be stricken with diarrhea
B.diarrhea is no longer a serious disease in the modem world
C.diarrhea has been a threat to humanity throughout history
D.the elderly are more likely attacked by diarrhea than the young
A. people of higher status are less likely to be stricken with diarrhea
B.diarrhea is no longer a serious disease in the modem world
C.diarrhea has been a threat to humanity throughout history
D.the elderly are more likely attacked by diarrhea than the young
【单选题】The passions of love and pride are often found in the same individual, but having little in common, they mutually______, not to say destroy, each other.
A.reinforce
B.annihilate
C.enhance
D.weaken
A.reinforce
B.annihilate
C.enhance
D.weaken
【单选题】Mass production is ______ only in an economy with a highly developed technology.
A.feasible
B.permissible
C.allowable
D.receivable
A.feasible
B.permissible
C.allowable
D.receivable
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