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A tank has been sealed and unventilated for a long...

海船船员考试

单选题

A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）

发布日期：2021-03-22

A.The tank is safe to enter

B.The tank is especially dangerous to enter

C.Carbon monoxide is present

D.Water vapor present when the tank was sealed has oxidized

标签： tank sealed unventilated long period

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