單項選擇題

Please adjust the derrick （）(向下).

A.upwards
B.downwards
C.forwards
D.backwards

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單項選擇題

The （）(箱裝貨) should be handled by cargo tray.

A. bagged cargo
B. drummed cargo
C. cased cargo
D. packed cargo

單項選擇題

The （）(側穩(wěn)索) has gone wrong.

A. side guy
B. guy
C. center guy
D. side stay

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