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.

圆明园是驰名中外、精美绝伦的“万园之园”。英法联军于（）侵入圆明园大肆劫掠，并由额尔金下令纵火焚烧了这一世界名园。

圆明园是驰名中外、精美绝伦的“万园之园”。英法联军于1860年侵入圆明园大肆劫掠，并由额尔金下令纵火焚烧了这一世界名园。

圆明园始建于康熙年间，完成于（）时。

圆明园中的建筑主要建立于康熙朝

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

我国第一部系统研究农学的著作是《（）》。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。