（）, 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 （）.

涉外婚姻，在狭义上，专指（）在中国按照中国法律结婚、离婚或复婚。婚姻家庭法学中的涉外婚姻，通常指的是狭义的涉外婚姻。

人类社会共经历了几种婚姻形态？

泸沽湖畔主要居民是摩梭人，迄今仍保存着母系家族制的遗风，他们的家庭实行走婚式的“阿夏”婚姻制度，这种独特的婚姻家庭制度，被称为研究原始婚姻形态及其发展的“活化石”。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

原始社会的人类最早的婚姻形态为（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。