石油相对密度或石油比重指（）。

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。

所谓静止的流体，其实说明流体处于相对静止状态。

当密度值是用于散装石油计量时，在散装石油温度或接近散装石油3℃下测定密度，可以减小的误差是（）

摩擦是一门新兴学科，它涉及数学、力学、物理、化学、冶金学、石油学、化学工程等学科。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

按石油的相对密度划分：相对密度小于0.9者为轻质石油，大于0.9者为（）质石油。