韦伯数的物理意义表示（）。

雷诺数的物理意义表示:( )

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.

可以这样理解流体在直管内流动时摩擦系数与雷诺数的关系：摩擦系数与宙诺数的k次方成正比，随着雷诺数的增加，k值（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

雷诺数的物理意义是什么？

F1系列PLC—OR指令表示（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。