哪次战争标志着高技术战争进入了成熟时期？

综合类博物馆、历史类博物馆、艺术类博物馆之外的其他博物馆的平均人员数量比上年（）

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。

“卧薪尝胆”是形容人刻苦自励，发奋图强。这个成语典故主要说的是历史人物（）励精图治的故事。

在下面外国侵略者发动的侵华战争中哪次攻进了北京城，并大肆抢劫（）①鸦片战争②第二次鸦片战争③甲午中日战争④八国联军侵华战争

在陕西省许多历史类博物馆中，有我国第一座史前遗址博物馆。这座博物馆是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。