单位荷载法是由（）推导出来的。

单位荷载法是由什么推导出来的（）。

力法和位移法既能用于求超静定结构的内力，又能用于求静定结构的内力。

力法典型方程中全部系数和自由项都是基本结构的位移，所以，求系数和自由项的实质就是求静定结构的位移。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, 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？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。