（）, 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.

导游员应遵守社会公德。社会公德包含人与人关系、人与社会关系、人与（）关系三个方面的内容。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

综合实践活动包括研究性学习、社区办事和（）三个领域。综合实践活动的精髓是通过研究而学习。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

布尔逻辑具体检索时，是通过三个布尔运算符来实现其功能的：AND、OR、（）。