安全监测装置的电源必须取自被控开关的()侧。
A、电源侧
B、负荷侧
C、两侧都可以
参考答案:A
下列应采取血液-体液隔离的是()
A.鼠疫
B.艾滋病
C.伤寒
D.肺结核
E.新生儿脓疱疮
Releasing oil from the sea anchor of a lifeboat may().
A.keep the propeller from being fouled
B.increase propeller speed
C.help calm the waves in the vicinity of the craft
D.increase the holding power of the sea anchor