题目内容
（请给出正确答案）
Deficient oxygen content inside a chain locker can be detected with ______.
A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator
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更多“Deficient oxygen content insid…”相关的问题
A．smoking reduces the oxygen carrying capacity of his blood
B．smoking and drinking make him malnourished
C．the problem of deficient oxygen supply and malnourishment act synergistically
D．it's the normal metabolism
Gas masks ______.
A.should be worn while fighting a fire
B.can be used in atmospheres deficient in oxygen
C.filter contaminants from air that is to be breathed
D.may be substituted for a self-contained breathing apparatus
A.sufficient
B.efficient
C.proficient
D.deficient
A.deficient
B.desperate
C.devastating
D.decisive
A.deficient
B.desperate
C.devastating
D.decisive
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