（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

语言从根本上说，是一种（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

教学从本质上说，是一种（）。

教学从本质上说，是一种（）

教学从本质上说，是一种（ ）。

教学从本质上讲是一种（）

从本质上讲，教学是一种（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。