单项选择题
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
单项选择题 What is required by regulations concerning the stowage of lifeboats on cargo vessels?（）
单项选择题 What could be a result of insufficient lubrication of lifeboat winches and davits?（）
单项选择题 Upon hearing the abandon ship signal，you put on your life jacket and report to your station. After the cover is removed you board your open lifeboat boat. The FIRST thing to do is to（）.