單項(xiàng)選擇題

Vessels transiting the canal must have their accommodation ladders and cargo booms（）.

A.removed
B.rigged in
C.readjusted
D.tested

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單項(xiàng)選擇題

Vessel on her delivery shall be ready to receive cargo with clean-swept holds and（）and in every way fitted for ordinary cargo service.

A.right，correct and safe
B.sufficient，efficient and coefficient
C.nice，tidy and in good working condition
D.tight，staunch and strong

單項(xiàng)選擇題

Variation is not constant; it is different with every change in（）.

A.speed
B.vessel heading
C.geographical location
D.cargo