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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

押品管理可以概括为押品实物管理、押品价值管理、押品风险管理等方面。

为有效控制外部服务和供应品采购质量，检验机构对服务和供应品的（）。

对服务和供应品应按《服务和供应品采购程序》（）、《标准物质管理程序》等进行有效控制。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

押品管理包括押品分类、风险预警、押品返还与处置等全流程管理，下面哪几个环节也属于押品管理范畴（）。