难道像流感病毒，每年都变异？那美国还让小孩打什么疫苗，屁用没有。

来源: 流水无痕于 2016-12-16 14:37:04 [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.