不确定。直接和间接知道的病例太少，而且有没有对照。

来源: 老道于 2020-04-10 17:01:51 [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.