单项选择题
A.bight block B.gin block C.heel block D.snatch block
You can safely step in the bight of a line（）.A.when it ...
单项选择题You can safely step in the bight of a line（）.
A.when it is not under strain B.if both ends are made fast C.in an emergency D.at no time
When a pilot is on board to pilot the vessel the Letter...
单项选择题When a pilot is on board to pilot the vessel the Letter（）must be hoisted.
A.G B.H C.B D.N
