hehe， interesting answer: cats won't be trained for diff. tasks.

来源: 小源 于 2012-05-21 18:20:57 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (75 bytes)
回答: good q 由 走马读人 于 2012-05-21 17:53:49

"Black or white cats are all good, as long as they catch mice/rats."

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