them to study. those are not include in their books. each AP class students take, they have to visit top university site to study themself. not as easy as you said.
Che and bio, they have MIT, standford, cornel, prinston and othe
所有跟帖:
• don't worry, AP to 5 is not difficult to chineses kids at all. o -BBB_Bond- ♀ (0 bytes) () 12/09/2011 postreply 15:29:05