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。

根据社区治安管理主体的职责，社区治安管理的内容包括（）。

社区卫生服务以下列哪种医学模式为基础（）。

社区卫生服务以下列哪种医学模式为基础（）。

社区卫生服务以下列哪种医学模式为基础

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

社区居委会是社区居民依法实行自我管理、自我教育、自我服务、自我监督的群众自治组织。