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【单选题】
※患者男,66岁。慢性肺源性心脏病,持续给氧。当氧气还有5kg/cm2时,护士就来更换氧气瓶了,患者不理解为什么氧气没用完就要更换氧气瓶。护士对患者解释瓶内氧气不能用尽,需保留一定量氧气的目的是A.
便于调节氧流量
B.
便于再次充气
C.
防止再次充气时引起爆炸
D.
使流量平稳，便于使用
E.
便于检查氧气装置有无漏气
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反馈参考答案：
举一反三
【单选题】After the actor told a funny story about his childhood, all the people burst into ______.
A.
laugh
B.
laughter
C.
laughing
D.
laughers
【单选题】—Are you a singer musician _____ an actor? —I'm an actor. [ ]
A.
and
B.
or
C.
of
D.
for
【单选题】Do you feel like ________ to a film or would you rather ________ at home.
A.
to go,to stay
B.
going, stay
C.
to go,staying
D.
going,to stay
【单选题】---Did the actor live alone in his house? ---Yes. He has a wife and two children. But ____ of them lives with him.
A.
none
B.
all
C.
both
D.
neither
【单选题】Unlike a stage actor, a film actor must be able to perform small scenes out of ________ and often days apart in time.
A.
compliment
B.
strategy
C.
interruption
D.
sequence
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