假如在AutoCAD系统屏幕上已绘制了一个图形，现将它作为一个实体来处理，应使用( )命令。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

在AutoCAD中，执行一次PLINEA（多段线，圆弧）命令绘制了所有圆弧，系统将其绘制成一个实体。

在AutoCAD中，系统提供了（）条命令用来绘制圆弧。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

假如某因素与某病关系的病例对照研究结果的OR值为0.3（P＜0.01），最可能的解释是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。