请教
所有跟帖:
• 回复:请教 -康MM- ♀ (62 bytes) () 01/13/2009 postreply 11:32:11
• 非常感谢,不用方程行吗?是小学奥数题,谢谢!! -gsdping- ♂ (0 bytes) () 01/13/2009 postreply 21:30:45
• 回复:非常感谢,不用方程行吗?是小学奥数题,谢谢!! -康MM- ♀ (86 bytes) () 01/15/2009 postreply 07:13:36
• Try this -passenger101- ♂ (1209 bytes) () 01/14/2009 postreply 12:40:06
• draw a diagram..haha thats how i did it in primary school -Mushy- ♂ (215 bytes) () 01/15/2009 postreply 04:23:36