题目内容

-- Good morning, Sir. May I help you? --_____________________

A. No, I don’t buy anything
B. No, I don’t need your help
C. Yes, I need some sugar
D. Oh, no . That OK .

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---Would you like to order now? ---___________________

A. I’m full now
B. Yes. I’d like fish and soup
C. But the price is high
D. It’s very kind of you

--- Hi, is Marry there, please? ---_____________________

A. Hold on. I will get her
B. No, she isn’t here
C. Yes, she lives here
D. Yes, what do you want

鉴别异烟肼片时,取片粉适量,加水10ml,振摇,滤过,取滤液1ml,置试管中,加氨制硝酸银试液1ml,即发生与_,并在试管壁上生成银镜。

异烟肼可由原料反应不完全或贮藏中的降解反应而引入的杂质是()

A. 间氨基酚
B. 水杨酸
C. 对氨基苯甲酸
D. 游离肼