尿液标本作L型菌培养时，培养基中加入20％蔗糖的原因是（） A.

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问题单项选择题

尿液标本作L型菌培养时，培养基中加入20％蔗糖的原因是（）

A.提供高营养

B.使尿中蛋白质变性

C.保持高渗环境

D.稀释尿液

E.中和尿液的酸度

答案

参考答案：C

补全对话，情景问答

情景交际：用适当的语句完成对话。

A: Hi, Jason! Could you practice basketball with me this afternoon?

B: __1__. I have to do the laundry this afternoon.

A: __2__?

B: No, not really. It's very boring, but my parents are too busy to do it.

A: I see. I hate doing it, too. But I like other chores.

B: __3__?

A: I like taking out the trash and making the bed. I think they're relaxing and very easy to do.

B: __4__?

A: Yes, very much. I think cooking is interesting.

B: __5__. I often help my mum cook.

名词解释

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