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问题 单项选择题

鉴别巴比妥类药物的硝化反应，主要是利用该类药物结构中的

A．不饱和碳氧双键

B．不饱和碳氮双键

C．互变异构中形成是羟基

D．取代基中含有的双键

E．取代基中含有的苯环

答案

参考答案：E

填空题

从方框中选择最佳选项补全对话

A. Was it exciting

B. How was your vacation

C. Frank helped me study it

D. Where did you go on vacation

E. Did you go to the movies last night

A:小题1:　?

B:It was great. I enjoyed it.

A:小题2:　?

B:My family went to the Great Wall. We visited my uncle in Beijing.

A:小题3:　?

B:No,I stayed at home and studied for the math exam.【小题4】　. Did you go?

A:Yes,I did. I saw Lost in Thailand《人再囧途之泰囧》last night.

B:小题4:　?

A:It was really exciting.

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多项选择题

一机多票开票子系统V6.15中，企业利用“抄税处理”中的抄上期资料功能抄税时，无法抄税成功，可能的原因是（）。

A.IC卡中有报税成功标志

B.系统已到锁死期

C.IC卡中有抄税信息

D.上期税报成功并且已读入报税成功标志

E.IC卡中有购退票信息
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