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單項(xiàng)選擇題

（）(降下)the derrick, please.

A. Lower
B. Top
C. Hoist
D. Take down

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單項(xiàng)選擇題

Before the operation of the derrick, check all （）(索具)closely and everything must be in good condition.

A.blocks
B.goosenecks
C.tackle
D.guys

單項(xiàng)選擇題

The（）(地腳貨) must be bagged.

A. bagged cargo
B. delicate cargo
C. sweepings
D. inboard cargo