简述布尔算符（OR）的作用。

扩散作用、离子通道运输、载体运输、质子泵运输和胞饮作用运输溶质各有什么特点？

OR指令的作用是: 。( )

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。

物质通过生物膜的方式有（）；（）、被动易化扩散、主动转运、胞吞或胞饮。

原生动物中各纲在水体自净和污水生物处理中如何起指示作用？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。