有机化合物是含碳元素的化合物，所以凡是含碳的化合物都是有机物。

按有机化合物中碳碳结合的方式，将有机化合物分为

有机化学中将含有C=C（碳碳双键）的化合物叫（）。

炔烃有顺反异构体。

烯烃有顺反异构现象，环烷烃不可能有顺反异构现象。

下列烯烃哪一个有顺反异构体（）。

炔烃有顺反异构体。

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.

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。