自隋唐以来科举制度就成为封建王朝的主要选官制度。对此，唐太宗说：“天下英雄，入吾彀（喻牢笼，圈套）中”。顾炎武说：“八股之害……败坏人才”。康有为说：“变法之道……莫先于改科举。”试结合儒学的发展简述科举制度在我国发展演变的过程。分析三人言论的社会背景和目的。你怎样评价科举制度？
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