单项选择题
A. monthly B. every three months C. once monthly D. every two months
During operation, the （）should check the working condit...
单项选择题During operation, the （）should check the working condition of the derrick.
A.foreman B.operator C.opener D.stevedore
（）has more than ten percent broken wires. Stop using it...
单项选择题（）has more than ten percent broken wires. Stop using it at once.
A. The cargo runner B. The cargo block C. The derrick sling D. The lashing wire
It is flammable cargo. Keep it away from the （）.A.gangw...
单项选择题It is flammable cargo. Keep it away from the （）.
A.gangway B.bow C.boiler D.stern
