题目内容
（请给出正确答案）
[单选题]
A. before B. after C. during D. behind
A.before
B. after
C. during
D. behind
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.before
B. after
C. during
D. behind
如果结果不匹配，请 联系老师 获取答案
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The author of the passage advises us to do all the following EXCEPT______.
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You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE？
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B.The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank
C.The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue
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A.before
B.after
C.ahead
D.behind
