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 （）.

The（）may examine or re-examine the goods or take samples from them straightaway in the absence of the consignee or the consignor whenever it considers this necessary.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

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。

Damage to cargo caused by fumes or vapors from liquids，gases，or solids is known as（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

法理学界许多学者还将法律规则分为： （1）强行性规则，即内容具有强制性质，不允许人们随便加以更改的法律规则； （2）任意性规则，即规定在一定范围内，允许人们自行选择或者协商确定为与不为，为的方式以及法律关系中的权利义务内容的法律规则。 按此种分类，下列条文表述的法律规则属于强行性规则的是（）