题目内容

物理萃取即溶质根据_______的原理进行分离的。

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对乙酰氨基酚应检查的特殊杂质是()

A. 游离水杨酸
B. 对氨基酚
C. 游离肼
D. 酮体

其水溶液加三氯化铁试液显蓝紫色()

A. 苯巴比妥
B. 盐酸普鲁卡因
C. 硫喷妥钠
D. 阿司匹林
E. 对乙酰氨基酚

——Why didn’t Tom give you one of his paintings?——I didn’t want one, but he would have given me one if I ____.

A. have
B. had
C. will
D. would

I ____come yesterday, but I couldn’t.

A. was to have
B. must
C. ought
D. have to