It is sometimes necessary to moor bow and stern to two mooring buoys in order to ______.
A.avoid any swing in a restricted space
B.shelter the ship from strong winds
C.prevent from touching with other vessels
D.make a convenience of cargo discharging
正确答案：A
为了避免船舶在受限的水域偏荡有时有必要船首尾都系浮筒
