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• 谢谢！但看了就贴，有网友说singgaporeMath.com的书才是正宗的。 -GoldenSunshine- ♀ (21 bytes) () 10/03/2011 postreply 11:07:15

• Check the pictures from both sites and compare. -Rockeymountain- ♀ (94 bytes) () 10/03/2011 postreply 11:09:19

• 从封面上看是一样的。但amazon本身没货 -GoldenSunshine- ♀ (409 bytes) () 10/03/2011 postreply 11:21:03

• amazon本身没货 is a problem then. I guess I bought the different one -Rockeymountain- ♀ (0 bytes) () 10/03/2011 postreply 11:29:27

• 什么是：“ 正宗的”？，老美的数学从Algebra开始就学Graphs了，很实用 -尚宫娘娘- ♀ (0 bytes) () 10/03/2011 postreply 11:12:06