（）, 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.

心理学是研究心理现象的科学，个体心理现象分可为（）和（）两个方面。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

表象的特征是什么？

表象的基本特征是()．

表象的两个特征是（）；（）。

记忆中所保持的客观事物的形象称为记忆表象，表象的特征有（）

记忆表象具有两个特征，即直观性和（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。