An oxygen indicator can be used to determine if there is ______.A.sufficient oxygen in a compartment to support lifeB.combustible gases presentC.hyfrogen gases presentD.All of the above
An oxygen indicator can be used to determine if there is ______.
A.sufficient oxygen in a compartment to support life
B.combustible gases present
C.hyfrogen gases present
D.All of the above
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我国实施ISM规则的主管机关是______。A.港口部门B.中国船级社C.国家海事局D.船公司