鸭子被吃掉了

Yes, I know what you mean.

1:x = Vf: Vduck
PI: 1-x = Vf : Vduck

so the fox (or cat) will be there to eat this duck.

所有跟帖： 

• I mean if Vf is less than that. -皆兄弟也- ♂ (0 bytes) () 05/14/2010 postreply 09:29:15

• I mean vf is larger than that, the duck still can free -guest007- ♀ (497 bytes) () 05/14/2010 postreply 14:23:47

• 鸭在半径为x 的圆上与狐周旋于同一直径远端，不可能. -jinjing- ♀ (170 bytes) () 05/14/2010 postreply 15:52:06

• 回复：鸭在半径为x 的圆上与狐周旋于同一直径远端，不可能. -guest007- ♀ (64 bytes) () 05/15/2010 postreply 21:26:51