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单选题
A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）
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
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更多 “单选题A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）A The tank is safe to enterB The tank is especially dangerous to enterC Carbon monoxide is presentD Water vapor present when the tank was sealed has oxidized” 相关考题
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3E
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