尿素氮测定（脲酶法）时，无蛋白血滤液中之尿素经尿素酶作用后可

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问题单项选择题 A1/A2型题

尿素氮测定（脲酶法）时，无蛋白血滤液中之尿素经尿素酶作用后可产生（）

A.氮气

B.硫酸钠

C.碳酸钠

D.氨

E.氨基硫脲

答案

参考答案：D

选择题

— Do you know ______ the new mobile phone last week?

— Maybe 900 yuan. I'm not quite sure. [ ]

A. how much she paid for

B. how much will she pay for

C. how much did she pay for

D. how much she will pay for

填空题

会员单位应制定消费者投诉受理程序和时限，妥善处理消费者投诉，提高（）。