单项选择题
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A.She wants to make sure if she graduated successfully.
B.She has applied for the man’s school as a postgraduate this autumn.
C.She has called her teachers to ask some academic questions.
D.She is preparing for her graduate paper.
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单项选择题
According to Cynthia Kenyon, anti-aging drugs in the future will ______.
A.extend the average and maximum lifespan
B.be useful to test Dr Rattan's hypothesis
C.cure some diseases related to aging
D.be taken to study their side effects
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单项选择题
From Dr Rattan's point of view, the results of calorie restriction in the CALERIE study ______.
A.were doubtable whether they were valid or not
B.did not show the effect in preventing age-related diseases
C.failed to prove the effect in increasing average lifespan
D.could not testify the effect in changing maximum lifespan
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