North Korea threatens to ________ from six-party talks aimed at ending North Korea's nuclear program unless its proper rights are to be satisfied．A.escapeB.fleeC.withdrawD.retire
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C解析试题分析：A. escape 逃脱 B. flee 逃跑 C. withdraw撤销，退出 D. retire退休；句意：除非朝鲜适当的权利得到满足，否则朝鲜就威胁要退出旨在终止朝鲜核项目的六方会谈。故选C考点：词义辨析
点评：词义辨析考的是学生的基础词汇知识，了解每个选项的含义是做好此类题型的关键，解答此类习题，首先要求学生有一定的词汇量，句意理解后便可作答，所以平时的基础知识记忆，词汇积累是解答好这种题的关键。