單項(xiàng)選擇題A vessel’s bottom will be subjected to tension when weight is concentrated（）.

A.amidships
B.aft
C.at both ends of the vesel
D.forward


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1.單項(xiàng)選擇題A vessel’s quarter is that section which is（）.

A.abeam
B.dead astern
C.just aft of the bow
D.on either side of the stern

2.單項(xiàng)選擇題A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.

A.submerged rock, not dangerous to navigation
B.sunken wreck, not dangerous to navigation
C.towed-under buoy
D.All of the above

3.單項(xiàng)選擇題A wet cargo refers to（）.

A.a cargo that will be damaged if it gets wet
B.bulk liquids
C.cargoes that will cause condensation
D.liquids in containers

4.單項(xiàng)選擇題A wildcat ia a（）.

A.deeply-grooved drum on the windlass with sprockets with engage the links of the anchor chain
B.winch that running out of control due to a failure of the overspeed trips
C.line that has jumped off the gypsyhead while under strain
D.nylon line that parts under strain and whips back in a manner