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.

主要的分配系数有两种：（）分配系数，道夫分配系数。

分配系数是指xy/，用符号（）表示。分配系数越大，萃取分离的效果（）。

萃取分配系数

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

山西大学改为国立后，工学院存在哪些系？（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

有害组分在两相中的分配系数K可以下式表达：K=Ce/Cr[式中，K为分配系数（无量纲）；Ce为平衡时有机污染物在萃取液中的浓度（质量分数），%；Cr为平衡时有机污染物在萃余液中的浓度（质量分数）]。请计算，当K=4时，为从4t的原料中一次提取50%有害污染物，至少需要多少公斤萃取剂？