單項(xiàng)選擇題A bad separation makes the cargo()at its destination.

A.easier to discharge
B.more difficult to discharge
C.easierto load
D.more difficult to load


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A.at
B.in
C.on
D.to

2.單項(xiàng)選擇題A vessel fitted with twin screws is easier in()than a vessel with single screw.

A.turning maneuver
B.course setting
C.position fixing
D.regulating speed

3.單項(xiàng)選擇題Advise you()engines.

A.stop
B.to stop
C.stopping
D.stopped

4.單項(xiàng)選擇題All the copper bars are()different sizes.

A.at
B.in
C.by
D.from

5.單項(xiàng)選擇題All the rubber bales were separated().

A.by grade
B.by a grade
C.by the grade
D.by the grades