单项选择题

Which is the best title of this passage

A．The Second Wave of Feminist
B．Women' s Independent Spirits
C．The Unity of Women
D．The Action of Union
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单项选择题
The elderly mouse mentioned in paragraph two shows ______.
A．mice are also influenced by old age
B．mice that eat meager food live longer
C．how mice' s liver genes behave
D．how to metabolize drugs
单项选择题
According to the passage, the researchers are interested in ______.
A．the mice that started dieting in old age
B．27 of those 46 old genes that continued to behave like young genes
C．calorie restriction that works in people
D．dieting that makes sure a drug is effective
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