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单选题
A tank which has been sealed for a long period of time can be dangerous because （）.
A
steel surfaces consume oxygen by rusting
B
sealed tanks usually form a vacuum
C
moisture condenses in the tank, displacing the oxygen
D
most tank coatings give off poisonous vapors in the presence of moisture
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更多 “单选题A tank which has been sealed for a long period of time can be dangerous because （）.A steel surfaces consume oxygen by rustingB sealed tanks usually form a vacuumC moisture condenses in the tank, displacing the oxygenD most tank coatings give off poisonous vapors in the presence of moisture” 相关考题
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