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Know the conclusion of the argument: No nation can long survive unless its people are united by a common tongue.  Logic chain: If nation survives, then its people speak the same language. So people speaking the same language is a necessary conditions for its nation to survive. Then if people speak different language, the nation cannot survive. E simply points out the above is not true in one country. Thus, E weakens the argument. -- by 会员 sdcar2010 (2011/3/31 21:18:31)恩~ 懂了~~
 美女真的好热心呀~ 呵呵
 灰常感谢!!
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