（）, 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。

计算机操作中复制的快捷键为（）。

计算机操作中粘贴的快捷键为（）。

CAD制图中“比例缩放”的快捷键为（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

3dmax8.0中默认的打开环境背景设置对话框的快捷方式为（　　）。