题目内容

下面化合物羰基活性最强的是: ()

A. ClCH2CH2CHO
B. CH3CH2CHO
CH3CHClCHO
D. C6H5CHO

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下列化合物不能与HCN加成的是 ()

A. 正壬醛
B. 丁酮
C. 苯乙酮
D. 环己酮

Although more and more people begin to do shopping online, a majority of Internet users still do have security worries.

A. 对
B. 错

近代史上中国人民第一次大规模反侵略斗争是( )。

A. 三元里抗英
B. 武昌首义
C. 金田起义
D. 南昌起义

To compete with online shopping, many companies and shops have more special offers and begin the sales earlier than before.

A. 对
B. 错

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