杀G回来，裸奔！

guduliumang

我十号考，数学狂烂，就指望狗狗了，现在题库一换，我的数学，我的天哪．．．

mschen

一个產品包裝成十个一盒 如抽樣3个是壞的 就不寄出 問現有3个是壞的 寄出的概率是多少?

mschen

好象不太难
可能我到低分區

一个說某種鳥唱duet with her partner, when other lone female is around and other lone male is around than when other female accompany with male partner. This is to indicate how female bird try to protect security over her partnership.

Ask: When does this female bird sing duet? A. When other female lone bird around, than other male lone bird aound, than other female with family. B. When other female lone bird or other male bird around than other females with families. 大概這樣