当用绘图椭圆工具绘制圆时，必须按住（）键来拖动鼠标绘制

Word软件绘图工具栏中，椭圆按钮的作用是在活动文档中插入椭圆。如果要绘制椭圆，则在拖动的同时按住（）键。

当用鼠标移动文本时，移动鼠标光标到选取文本上，当鼠标光标变为（）状态时，按住鼠标左键拖动鼠标移动，此时鼠标光标也随之移动。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, 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（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

使用椭圆工具时，按住（）键的同时拖动鼠标可以当前位置为圆心画出一个圆。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。