正常人空腹血浆C肽水平为( )A．＜1.6ng/mlB．1.8ng/mlC．2.0_爱下问搜题

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问题单项选择题

正常人空腹血浆C肽水平为( )

A．＜1.6ng/ml
B．1.8ng/ml
C．2.0ng/ml
D．2.2ng/ml
E．2.8ng/ml

答案

参考答案：D

选择题

唐朝时，从中国传到大食的手工业技术是[ ]

A．丝绸、瓷器、纸张

B．造纸、纺织、制瓷

C．造纸、纺织、雕版印刷

D．冶铁、制瓷、造纸

选择题

Bill's aim is to inform the viewers that cigarette advertising on TV is illegal, _____?

A. isn't it
B. is it
C. isn't he
D. is he