（）, 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.

其他证人的证言等与案件相关的其它证据材料是“（）”案件中的辅助证据。

Banks have no liability for any delay or loss caused by postal or telex failure.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

罪嫌疑人王某被控犯有强奸罪，王某辩称，案件发生时，他正在和他11岁的侄子看电影，被害人的诉讼代理人认为王某的侄子是未成年人，而且口吃，具有语言障碍，不能准确表达，不具有证人的资格，所以其侄子的证言不能在本案中作为证据来使用。证人的必要条件有哪些？