太深奥了，我读了两边才想出来，不是脊椎动物

来源: 大蜜蜂于 2012-03-12 08:06:26 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.