什么是酸化？按照酸化工艺不同，酸化可分为哪两种？

钢筋混凝土楼盖按施工方法的不同分为哪两类( )

按照收入来源的性质不同，利润中心可分为自然利润中心和（）两类。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

测量仪器按照用途可以分为哪两类？其特点为？

人际关系的分类按照需求的性质，可以分为哪两类？（）

食品原料按照其材料的来源可分为哪两类。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

液压支架按使用地点不同分为¬哪两类？（）