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一、改革专题一、中国古代的改革1、商鞅变法(1)战国时期,各国先后实行了变法。其中以秦国的商鞅变法效果最为显著。(2)公元前356年,秦孝公任用商鞅主持变法。(
诗歌表达技巧一、表达方式表达方式分为五种:记叙、描写、议论、抒情、说明。在古代诗歌中主要运用记叙、描写、议论、抒情四种。二、描写手法描写指用生动形象的语言对人物
超强圆锥曲线结论总结结论1:过圆x2+y2=2a2上任意点P作圆x2+y2=a2的两条切线,则两条切线垂直.x2y2结论2:过圆x2+y2=a2+b2上任意点P
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