（）, 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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

位移法的基本未知量为结构多余约束反力。

位移法的基本未知量的数目和结构的超静定次数有关。

位移法的基本未知量是什么？位移法的基本结构是什么？位移法典型方程的实质是什么？

位移法的基本未知量与超静定次数有感，位移法不能计算静定结构。

位移法的基本未知量与超静定次数有关，位移法不能计算静定结构。

位移法的基本未知量是结点位移。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。