if x = 2y, -3x+5 = ?
所有跟帖:
• 这个太简单了吧? :) -CirrusCloud- ♀ (0 bytes) () 04/03/2014 postreply 10:17:55
• This is SSAT.:). -yesterday*once*more- ♂ (0 bytes) () 04/03/2014 postreply 10:18:36
• 这个太简单了吧? :) -CirrusCloud- ♀ (0 bytes) () 04/03/2014 postreply 10:17:55
• This is SSAT.:). -yesterday*once*more- ♂ (0 bytes) () 04/03/2014 postreply 10:18:36