A.三葉蟲(chóng) 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
A.0.3~0.6B.1~3C.3~6D.6~10