三歲的兒子問: "那麽為什麽短波長的光在空氣中散射更厲害啊?"

來源: 季襄於 2011-09-13 15:16:15 [舊帖] [給我悄悄話] 本文已被閱讀：次

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