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
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1．概括说明中美大学生的主要收入来源；2．分析一下产生这种不同现象的可能原因；3．指出个人对其将来趋势的预测。Survey of Income Sources of American and Chinese Students
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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