石油的化合物有正构烷烃、异构烷烃、环烷烃、芳烃和环烷芳烃、含氮、硫氧化合物、有机金属化合物及微量惰性气体等。

石油的化合物有正构烷烃、异构烷烃、环烷烃、芳香烃和环烷芳烃，含氮、硫、氧化合物，有机金属化合物及微量惰性气体等。

按照含氮的不同可以将原油分为（）。

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。

石油是一种成份十分复杂的天然有机化合物的混合物,其中主要成份是液态烃.

石油是一种成份十分复杂的天然有机化合物的混合物,其中主要成份是液态烃.