皮皮学，免费搜题
登录
搜题
【单选题】
液 - 液萃取分离法中,其萃取过程的本质是 ( )A.
将物质由疏水性转变为亲水性
B.
将物质由亲水性转变为疏水性
C.
将离子转化为络合物
D.
将离子转化为溶于有机试剂的沉淀
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Music should be taught routinely in schools because of the benefits _____ can have on the development of the brains of young children.
A.
which
B.
that
C.
one
D.
it
【单选题】The company wants to enroll three ________ this year to meet the need of its development.
A.
employers
B.
employees
C.
employing
D.
employed
【单选题】By saying “a victim of its own ubiquity and the industry’s conservative pace of development” (Line 5-6, Para. 1) , the author means that
A.
concrete suffers from its widely application as well as the slow development of building industry.
B.
concrete is not appreciated because of its dull color and other drawbacks, with little improvement as a building material.
C.
slow progress of building industry does harm to the application and popularity of concrete.
D.
concrete is ignored because it is conventional with little advance in its technology.
相关题目：