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.

煤炭、石油、天然气等矿物燃料，主要由各种有机质以及矿物杂质等组成，其中包括：（）。

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。

无机学说认为，石油、天然气是由（）生成的。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

按照目前世界平均开采强度，全球煤炭、石油和天然气分别可开采（）年。