简述布尔算符（OR）的作用。

OR指令的作用是: 。( )

湿式除尘器有哪些特点？除尘机理有哪些？

按对植物的作用性质除草剂可分为（）和（）。

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.

机组水机保护中作用于跳闸停机的保护有哪些？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

混凝的机理有哪些？并对每种机理加以解释说明。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。