公元前140年，汉武帝即位，称建元元年，“建元”是中国历史上第一个（　　）。

公元前140年，汉武帝即位，称建元元年，“建元”是中国历史上第一个（）。

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。

公元前221年，建立起的中国历史上第一个统一的中央集权的封建国家是（）。

公元前（）年，秦始皇统一中国。

秦始皇对于中国历史的影响只有负面的，比如禁锢思想，愚化百姓。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。