--- Good night and thanks again. ---______________________
A. You can’t say that
B. Oh ,no. It’s what I can do
C. How can you see that
D. Good night
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-- 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 .
---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。
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