单项选择题
The size of wire rope is determined by the（）.
A.number of strands B.number of wires in each strand C.circumference D.diameter
单项选择题 The safest procedure used to rig a guy and preventer is to have the guy（）.
单项选择题 The maximum number of passengers a Vessel may carry（）.
单项选择题 The ladder shall（）.
