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單項選擇題

When the derrick is stopped, the guy must be（）.

A. take in
B. slacked off
C. stowed
D. taken

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單項選擇題

（）cargo has different characteristics and forms of packaging. They may be in bags, bundles, cases or steel drums.

A.General
B.Bulk
C.Containerized
D.Liquid

單項選擇題

All the cargo wires must be greased （）.

A.well
B.good
C.nice
D.perfect

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