提示铁缺乏的较敏感指标是A．红细胞游离原卟啉＞0.9/μmol/L B

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问题单项选择题

提示铁缺乏的较敏感指标是

A．红细胞游离原卟啉＞0.9/μmol/L

B．血清铁＜9.0-10.7/μmol/L

C．总铁结合力＞62.7μmol/L

D．转铁蛋白饱和度＜15%

E．血清铁蛋白＜12/μg/L

答案

参考答案：E

选择题

- Peter, do you know who _______ my dictionary?- Sorry, I don't know. I _______ it.

A．took away; didn't do

B．has taken away; didn't do

C．had taken away; haven't done

D．has taken away; hadn't done

选择题

It was not until he came back _____ he knew the police were looking for him.

A．which

B．since

C．that

D．before