等 级：黄金词友
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主题：[SAT Physics] Chapter 21 Section 4 : Studying Your… No, Wait, Go Take a Break
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You know how to have fun. Go do that for a while. Then come back when you’re refreshed.
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SAT题目：http://apps.collegeboard.com/qotd/question.do
楼主 Date: 2008-04-05 13:46:16
