正常孕妇的血镁浓度为多少mmol/L( ) A．0.5～0.75 B．0.75～1

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问题单项选择题

正常孕妇的血镁浓度为多少mmol/L( )

A．0.5～0.75
B．0.75～1.0
C．1.7～3.0
D．3～3.5
E．7.5～10

答案

参考答案：B

选择题

______ as the main reason for the recent world-wide economic problems is the fact that the US government would hardly accept.

A．Regarding

B．To regard

C．Regarded

D．Being regarded

单项选择题

国产天然气氨压缩浅冷装置氨压缩机正常停车，应立即（）。

A..减载

B.关吸气截止阀

C.停润滑油泵

D.关油冷却器进回水阀