單項(xiàng)選擇題

The “grip” of a joint represents the（）.

A.thickness of the connected members
B.diameter of the head
C.entire length of the rivet
D.diameter of the shank

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Starting motors，generators，and other spark producing devices should be mounted as high above the bilges as possible to（）.

A.keep them dry when the bilges are full of water
B.keep them cool when the vessel is underway
C.make them more accessible for repairs
D.prevent accidental ignition of any gasoline vapors that may have accumulated in the bilges

單項(xiàng)選擇題

Small hull leaks can be temporarily repaired by（）.

A.parcelling
B.parbuckling
C.caulking
D.seizing

The “grip” of a joint represents the（）.

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Starting motors，generators，and other spark producing devices should be mounted as high above the bilges as possible to（）.

Small hull leaks can be temporarily repaired by（）.

Starting motors，generators，and other spark producing devices should be mounted as high above the bilges as possible to（）.