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问题 单项选择题

心源性休克发病的中心环节是（）。

A.回心血量减少

B.心率过快

C.心输出量降低

D.心肌收缩力减弱

答案

参考答案：C

单项选择题

Although writing from different points of view and with different techniques, writers in the Victorian Period shared one thing in common, that is, they were all concerned about ______.

A. the fate of the upper class

B. the reformation of the government
C. the fate of the common people

D. the future of their family class
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问答题 简答题

SS3B机车辅助室内分别安装有那些设备？
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