简述布尔算符（OR）的作用。

OR指令的作用是: 。( )

普拉提运动就是稳定（）和（），在由身体中心运动的同时拉伸加固整个身体。

普拉提是由德国著名（）约瑟夫.普拉提创立并推广的。

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。

（）作用是供给机针成弯针形成线环所需的缝线并能收紧线迹。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。