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问题 选择题

脑白金主要成分的结构简式如下图所示，下列对脑白金主要成分的推论肯定正确的是

A．该分子含有一个肽键，属于二肽

B．其分子式为C13H16N2O

C．该物质不能与溴水反应

D．其官能团和营养成分与葡萄糖相同

答案

答案：B

单项选择题

On 9 December, James Joyce experienced one of those coincidences which affected him () at the time and which later became material for his books.

A. inadequately

B. systematically

C. profoundly

D. simultaneously
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单项选择题 A1/A2型题

下列表述正确的是：（）

A.喜则气缓

B.喜则气消

C.忧则气上

D.悲则气结

E.怒则气乱
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