单项选择题

Some sea water came into the wheel house during the voyage due to（）the window thereof.

A.not close
B.not closing
C.we didn't close
D.not to be closed

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If your vessel is dragging her anchor in a strong wind，you should（）.

A.shorten the scope of anchor cable
B.increase the scope of anchor cable
C.put over the sea anchor
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Production of mechanical foam by a portable in-line foam proportioner（）.

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