题海让大学四年没有难题
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单选题 The scuppers should be plugged_____

A. only if fixed containment is not used

B. only if portable containment is not used

C. only if fixed containment drains are open

D. whenever the vessel is being bunkered

学科:轮机英语

时间:2023-05-16 10:36:54

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