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.

在西方国家，政治与行政分离，政府公务员是职业行政管理人员，但争取选票和赢得选举是政治家和政府公务员共同的事。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下列不可能出现的天文现象：

下列不可能出现的天文现象（）。

下列不可能出现的天文现象是（ ）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。