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.

被鲁迅称为（）的汉代政论散文，是（）的代表作《过秦论》

《就任北京大学校长之演说》一文的作者是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

贾谊的《过秦论》在分类上是（）。

试述贾谊和《过秦论》（上）的思想内容。

贾谊《过秦论》归结秦朝灭亡的主要原因是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。