（）, 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。

将鼠标指针放在窗口标题栏上，双击可以()窗口。

用鼠标移动窗口，只需在窗口中按住鼠标左按钮不放，拖曳移动鼠标，使窗口移动到预定位置后释放鼠标按钮即可。

用鼠标移动窗口，只需在窗口中按住鼠标左按钮不放，拖曳移动鼠标，使窗口移动到预定位置后释放鼠标按钮即可。

在WindowsXP中，移动窗口的正确操作是用鼠标拖动窗口的（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。