（）, 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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

蒙古族的三大历史名著有（）、《蒙古黄金史》、《蒙古源流》。

蒙古族的三大历史著作是[蒙古秘史]、[蒙古源流]、[（）]。

窝阔台汗死后曾临朝称制5年的是：（）

（）年窝阔台汗建造以万安阁为中心的哈拉和林城。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。