（）, 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 （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

我国的社会保障体制的最大特点是城乡二元结构。

社会化的定义及含义是什么？社会互动？社会结构？社会分层？

社会史的二元对立有（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

统筹城乡经济社会发展，逐步改变城乡二元经济结构，是我们党从全面建设小康社会全局出发作出的重大决策。统筹城乡发展，必须更加注重加快农村发展，关键是（）