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问题 多项选择题

会导致分接开关发生故障的原因有（）。

A.分接开关接触不良，经受不起短路电流冲击发生故障

B.倒分接开关时，由于分头位置切换错误，引起开关烧坏

C.相间绝缘距离不够，引起短路

D.分接开关触头弹簧压力过大，使有效接触面积过大引起分接开关烧毁

答案

参考答案：A, B, C

单项选择题

可导致血液流动性丧失的红细胞比容为()

A．0.8

B．0.4

C．0.7

D．0.2

E．0.6
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单项选择题

A client with shock brought on by hemorrhage has a temperature of 97.6°F (36.4℃), a heart rate of 140 beats/minute, a respiratory rate of 28 breaths/minute, and a blood pressure of 60/30 mmHg. For this client the nurse should question which physician order（）

A. "Monitor urine output every hour. "

B. "Infuse IV fluids at 83 mL/hr"

C. "Administer oxygen by nasal cannula at 3 L/min"

D. "Draw samples for hemoglobin and hematocrit every 6 hours. "
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