题目内容

---So hot in the classroom. Would you mind _____ the window?--- No, I’ll do it right now.

A. to close
B. not opening
C. closing
D. opening

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---Would you mind if I sit here?--- _____. The seat has already been taken.

A. Good idea.
Better not.
C. I'd love to.
D. You have to.

---What about going out for a drink？---______.

A. It sounds good.
B. You may, if you like.
C. No, I don't mind.
D. You're welcome.

异烟肼具有下列哪些理化性质（）

A. 与氨制硝酸银反应产生银镜反应
B. 与铜离子反应可生成有色的络合物
C. 具有水解性，生成异烟酸
D. 与香草醛作用生成黄色沉淀
E. 重氮化-偶合反应

异烟肼常配制成粉针剂，临用前才配制是因为( )

A. 水解
B. 氧化
C. 风化
D. 还原
E. 异构化