A.奧陶紀 B.朱羅紀 C.泥盆紀 D.二疊紀
A.三葉蟲 B.鸚鵡螺 C.筆石 D.恐龍
A.30,50,85,800,3000 B.17,50,200,800,3000 C.30,50,200,800,3000 D.17,50,85,800,3000