• 谢了,题海吧。。哭。刚买了本“Pre-Algebra (Prentice Hall Mathematics) workbook” -glx2011- ♀ (21 bytes) () 11/08/2011 postreply 13:33:58
• 课本就可以了 -acreek- ♀ (897 bytes) () 11/08/2011 postreply 13:50:52
• 太贵了 -洲河- ♀ (0 bytes) () 11/08/2011 postreply 14:00:45