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。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

资本主义再生产周期的决定性阶段是（）阶段。

资本主义生产周期所经历的阶段一般是（）。

在资本主义再生产周期中，既是上一个周期终点又是下一个周期起点的阶段是（）

经济周期经历周期性的四个阶段以此为（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。