42104/42105都是学什么的哪个版本？[问题]

[兜兜宝宝]

手里有第三版的 可以用吗？ 还是要买新的呢？

 

[doublesky]

42104 and 42105 are different book.

I have the book for 42105, just bought new one last term.
If you need,email me: onsale12342003@yahoo.com
or QiaoQiaoHua