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单选题 ____________

A．Animal populations in the Mesozoic era were smaller than previously believe.
B．Oxygen levels in the Mesozoic era were higher than previously believe.
C．Ocean levels in the Mesozoic era fluctuated more than previously believe.
D．Plant life in the Mesozoic era was less abundant than previously believe.

参考答案D

解析: 【预测】选项中重复出现的in the Mesozoicera，than previously believe以及populations和oxygen／ocean表明，本题可能考查某个时期所发生的变化，可能涉及地理环境和动植物的数量。
【解析】D。录音中教授提到，很多年以来我们都认为是中生代丰富的植物群(abundant plant life.使这些巨型动物得以存活．现在却发现由于中生代时期的氧气含量比我们假定的低，蜥脚类恐龙可吃的食物比我们想的要少，D是对该发现的概括．故为答案

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单选题 ____________

A．It leads to many new questions.
B．It is very useful to some extent.
C．It hinders the normal study process.
D．It makes the study work more difficult.

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单选题Questions are based on the following passage.
Sending your children to piano or violin lessons in a bid to boost their academic achievement is a waste of money, according to scientists. Although research has shown that youngsters who take music lessons are more likely to be 26 of their class, psychologist Glenn Schellenberg claims this link is 27.
Instead, improved academic performance may be because brighter children from privileged 28 are more likely to learn an instrument, rather than music classes helping to boost their 29."Music may 30 you a bit, but it's also the case that different children take music lessons," said Professor Schellenberg of the University of Toronto, who added that parents' education was the most influential 31 on musicality. "Children who take music lessons come from families with higher incomes, they come from families with more 32 parents, they also do more extracurricular (课外的) activities, they have higher IQs, and they do better at school."
In tests on 167 children who played the piano or other instruments, they found their answer to personality tests could 33 how likely it was for them to continue their music lessons. Those who were more outgoing and conscientious were more likely to continue to play.
"We were 34 by the fact that kids who take music lessons are particularly good students, in school they actually do better than you would predict from their IQ, so 35something else is going on," Professor Schellenberg told the American Association for the Advancement of Science(AAAS. annual conference in Boston. "So we thought that personality might be the personality."
第26题__________

A．backgrounds
B．change
C．decrease
D．displayed
E．educated
F．emotional
G．factor
H．fortunately
I．intelligence
J．misleading
K．motivated
L．obviously
M．predict
N．status
O．top

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单选题第27题__________

A．backgrounds
B．change
C．decrease
D．displayed
E．educated
F．emotional
G．factor
H．fortunately
I．intelligence
J．misleading
K．motivated
L．obviously
M．predict
N．status
O．top

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