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【单选题】
在临床试验中，采用盲法的主要目的是（）。A.
使试验组与对照组更具可比性
B.
增加受试对象的依从性
C.
减少选择性偏倚
D.
减少主观因素引起的信息偏倚
E.
使研究更合乎道德
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【简答题】A．He couldn't hold back the secret. B．He couldn't help the woman at all. C．He couldn't possibly tell the boss. D．He couldn't decide who told the boss.
【单选题】Which of the following statements about Yellen is INCORRECT?
A.
She once taught at Harvard University.
B.
She got tenure at Berkeley University.
C.
She has a Nobel Prize in Economic Theory.
D.
She has been working in the Federal Reserve for over 10 years.
【单选题】In the author's opinion, the debate at Harvard ________.
A.
is a symbol of the general bewilderment.
B.
will soon be over.
C.
will influence the future life in America.
D.
is interesting to Harvard men and their friends.
【简答题】Earlier this year, we announced a new【L9】______at Harvard aimed at the
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