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【单选题】
悬浮于液体介质中的固体微粒在外界作用下急速与介质分离时 , 在液体表面层和底层之间产生电势差的现象叫A.
(A) 电泳
B.
(B) 电渗
C.
(C) 流动电势
D.
(D) 沉降电势
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举一反三
【单选题】The author suggests that______.
A.
we shouldn't blame a person if he fails to act in emergencies
B.
a person must feel guilty if he fails to help
C.
people should be responsible for themselves in emergencies
D.
when you are in trouble, people will help you anyway
【判断题】The organization can switch to the old system if the new system fails in the parallel conversion approach.
A.
正确
B.
错误
【简答题】The ______ Approach is an approach developed by British applied linguists from the 1930s to 1960s.
【简答题】The author suggests that______. A) we shouldn't blame a person if he fails to act in emergencies B) a person must feel guilty if he fails to help C) people should be responsible for themselves in emer...
【简答题】B．[选修2——近代社会的民主思想与实践】 阅读下列材料，回答问题， 材料一然则苟有新氏，何怠无新制度，无新政府，无新国家!非尔寿．则虽夸日变一法，明日易一人，东潦西抹．学步效颦，吾未见其能济也。夫吾因言新法数十年，而效不睹者何也?则于新民之道未有留意焉者也。 …·若以夸日之民德、民智、民力，吾知虽有贤君相．而亦无以善其后也。 ——摘自粱启超《论新民为今日中国第一急务》 材料二许多人以为中国不适用...
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