其實地質曆史上既有二疊紀，也有三疊紀。隻是銀杏最早出現於二疊紀。

來源: 六龍飛天於 2025-10-04 00:47:44 [博客] [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.