单项选择题
A.Two B.Three C.Four D.Five
A.Six by seven galvanized wire rope B.Six by twenty-four improved plow steel wire rope C.Six by thirty-seven preformed fiber-core wire rope D.Six by nineteen regular-lay filler wire rope
A.Each lifeboat must have a launching appliance B.Launching appliances must be of the gravity type C.There may not be more than two launching appliances on the same deck D.All of the above