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單項選擇題

Do you want the derrick adjusted （）?

A. up and down
B. upwards or downwards
C. upside or downside
D. forwards and backwards

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單項選擇題

The safe working load of each derrick is five （）.

A.tones
B.tonnages
C.tons
D.dunnage

單項選擇題

All the （）in hold No.3 should be bagged.

A.sweep
B.sweeping
C.sweepings
D.dunnage

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