（）, 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 （）.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

公元1727年，清廷同俄国订立了哪两个条约，在划定中俄边界及处理两国通商问题等方面，维护了国家主权？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

清朝于（）年开始侵入蒙古，经过一个半世纪的战争，终于在1696年康熙时，覆灭四卫拉特准格尔汗国，完全征服了蒙古。

蒙古族的三大历史名著有（）、《蒙古黄金史》、《蒙古源流》。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。