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百度物理吧：http://tieba.baidu.com/f?ie=utf-8&kw=物理&fr=search
百度生物吧：http://tieba.baidu.com/f?ie=utf-8&kw=生物&fr=search
百度高考吧：http://tieba.baidu.com/f?ie=utf-8&kw=高考
大家好好学习啊！加油！
