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今天遇到一个题目,关于虚拟语气的,大家帮帮忙, 看选哪个, 以及理由是什么。谢谢!why didn't you tell him the truth?if i ________ you, i would have.A. wereB. had beenC. will beD. am
在选修1-2中42页的例5,书本在例举分析法的应用时出现的写法我觉得值得商榷:两组垂直就能直接得到线面垂直了么?那立几中的线面垂直判定定理岂不是没用了?http://bbs.mumayi.net/attachment.php?aid=439131&noupdate=yes[ 本帖最后由 jiangfjs 于 2007-11-22 11:05 编辑 ]
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