描述液体运动有两种方法：拉格朗日法和欧拉法。（）

以单个液体质点运动规律为研究对象的方法称为拉格朗日法。

流体运动时，流速沿流程变化缓慢，流线是彼此接近平行的直线，这样的流体运动称为（）。

流线是拉格朗日法分析流体运动的概念,迹线是欧拉法分析流体运动的概念。( )

可以在（）阶段采用Make-or-buy决策分析。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。