单项选择题

In towing，chocks are used to（）.

A.protect the towline from chafing
B.secure the end of the towline on the tug
C.stop off the towline while retrieving it
D.absorb shock loading on the towline

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单项选择题

In the case of new crude oil tankers，the additional ballast permitted shall be carried in cargo tanks only if such tanks have been（）before departure from an oil unloading port or terminal.

A.inerted
B.crude oil washed
C.diluted
D.cleaned

单项选择题

In most cases，the mere reception or dumping down of the cargo on the ship（）involve completion of loading，because the operation of loading involves all that is required to put the cargo in a condition in which it can be carried．

A.is not
B.has not
C.do not
D.does not