正常人体循环阻力的范围是A．2000～2500dynes·sec/cm5 B．150

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问题单项选择题

正常人体循环阻力的范围是

A．2000～2500dynes·sec/cm5

B．1500～2000dynes·sec/cm5

C．500～1000dynes·sec/cm5

D．2500～3000dynes·sec/cm5

E．1000～1500dynes·sec/cm5

答案

参考答案：B

单项选择题

以下是人力资源费用支出控制的三个阶段，具体程序是( )。 ①制定控制标准②差异的处理③人力资源费用支出控制的实施

A．(A) ①②③

B．(B) ②①③

C．(C) ②③①

D．(D) ①③②

选择题

—Have you seen Maragaret? The boss is looking for her everywhere.

—She________the train, otherwise she would have arrived here by now.

A．should have missed

B．must have missed

C．had missed

D．might miss