正确答案: D

whenever the vessel is being bunkered

题目：The scuppers should be plugged____ .

解析：D

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举一反三的答案和解析：

[单选题]须给他船让路的船舶包括________①交叉局面中的让路船；②对遇局面中的机动船；③规则18条规定的让路船；④规则19条听到他船一长两短声号的机动船；⑤追越中的追越船。

①③⑤

[单选题]柴油机缸内燃烧的物质是()

可燃混合气

[单选题]At least ___ cylinders in four--stroke engine will be configured to ensure that the engine can started with the crankshaft at whatever position.

6

[单选题]With reference to a two-ram actuating mechanism, which one of the following statement is FALSE?

The cross-head is mounted on the rudder stock

[单选题]外购成品活塞和配制活塞的尺寸、形状、位置精度和表面粗糙度等均应符合______要求

设计图纸