（）, 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。

（）代修筑的长城规模最大、历时最长、工程最坚固、设施最完善。

中国石窟中开凿最早，延续时间最长，规模最大，内容最丰富的一处是（）。

中国石窟中延续时间最长、规模最大、内容最丰富的一处石窟是（ ）。

世界上最大、内容最丰富、使用时间最长的佛教艺术宝库指的是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。