心脏病病人收缩压与心率乘积（RPP）小于多少可作为心肌耗氧量正_爱下问搜题

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问题单项选择题

心脏病病人收缩压与心率乘积（RPP）小于多少可作为心肌耗氧量正常时的指标（）。

A.8000

B.10000

C.12000

D.14000

E.16000

答案

参考答案：C

选择题

This is the only one of the books on space ___.

A．that has been written

B．that have been written

C．which have been written

D．which has been written

判断题

仪表稳压器不能使输出电压保持稳定。