（）, 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。

下列那个不是智能教学系统基本模块()。

下面的晶带符号是：（）

下面属于马桶生产成型工艺的工序内容的有（）

汽车在低温条件下行驶不会经常遇到下面的那个问题。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。