不懂數學，就別現眼啦。

來源: clearwave 於 2019-09-22 13:43:36 [舊帖] [給我悄悄話] 本文已被閱讀：次

GDP圖表以1979年為起點，而1952-1979是一條水平線

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