單項(xiàng)選擇題

There are some （）(貫穿螺栓) in the toolbox.

A. through bolts
B. nuts
C. bolts
D. split pins

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單項(xiàng)選擇題

All the （）(金屬板) and paint are to be supplied by the shipyard.

A.plates
B.plastics
C.boards
D.materials

單項(xiàng)選擇題

Sailors have to spend most of their time in （）(除銹) and painting.

A.derusting
B.cleaning
C.repairing
D.closing

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