菲克第一定律J=-Ddc/dx，菲克第二定律dc/dt=Ddc/dx，应用条件是什么？

 菲克第一定律描述了稳态扩散的特征,即浓度不随(   )变化。 

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

菲克（Fick）第一定律指出，扩散通量与浓度梯度成正比，扩散方向与浓度梯度方向（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。