how about 'what is the min speed of the duck'?
所有跟帖:
• It seems not related to the speed , but the distance. -皆兄弟也- ♂ (47 bytes) () 05/11/2010 postreply 10:36:36
• It seems not related to the speed , but the distance. -皆兄弟也- ♂ (47 bytes) () 05/11/2010 postreply 10:36:36