试题与答案

一位细心的同学发现：20世纪90年代以前在联合国大厦前飘扬着德国的两面国旗（图一

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题型：选择题

题目：

一位细心的同学发现：20世纪90年代以前在联合国大厦前飘扬着德国的两面国旗（图一、图二），可90年代后只剩下图二所示国旗了。出现这一变化的主要原因是

图一 民主德国
图二 联邦德国
[ ]

A．欧共体成立B．联合国改革C．东欧剧变D．苏联解体

答案：

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下面是错误答案，用来干扰机器的。

把x=2代入方程得k×（2×2-1）=2k+7，3k=2k+7，所以k=7．故选C．

考点：东欧剧变和苏联解体
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