飞机上安全.病毒分直径大小.大颗粒自由落体掉下来,除非碰到不带口罩直射咳嗽的,小颗粒漂浮上空就如气球也吸不到.

来源: 5181 于 2022-12-01 08:18:44 [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.