（）, 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 （）.

安全教育中的专业安全技术知识教育是指对某一工种进行必须具备的专业安全技术知识教育，不含（）知识教育。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

Cote Or科多尔位于（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

掌握某项专业技术知识理论或操作技术手法，还必须以其掌握的专门知识理论或操作技术从事某种专业技术工作或职业的人，才能称得上为专业技术人员。

根据网站内容的不同，专题学习网站可以大致划分为资源型的专题学习网站、自主学习型专题网站和技能知识学习网站。