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【简答题】
设 ，其中f为可微函数，验证: .
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反馈参考答案：
举一反三
【简答题】Darrow had whispered throwing a reassuring arm round my shoulder. ( )
【单选题】Darrow had whispered, throwing a reassuring arm round my shoulder as we were waiting for the court to open.
A.
consulting
B.
confiding
C.
comforting
D.
convincing
【简答题】Darrow had
whispered, throwing a reassuring arm round my shoulder as we were waiting for
the court to open.
【简答题】引起食品腐败变质的原因主要有（）、环境因素及微生物污染等三个方面来考虑。
参考解析：
知识点：
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