單項(xiàng)選擇題As to the stained plates,the fault lies()you.

A.on
B.to
C.up
D.with


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1.單項(xiàng)選擇題A virtual rise in the center of gravity may be caused by().

A.filling a partially filled tank
B.using an on board crane to lift a freely swinging heavy object
C.emptying a partially filled tank
D.transferring ballast from the forepeak to the after peak

2.單項(xiàng)選擇題A vessel is equipped with twin propellers,both turning outboard with the engines half ahead. If there is no wind or current and the rudders are amidships,what will happen?().

A.The bow will swing to starboard
B.The bow will swing to port
C.The vessel will steer a zigzag course
D.The vessel will steer a fairly straight course