20. Which two gases are believed to have dominated Farth's first (primary) atmosphere?(A) H &am

問題詳情

20. Which two gases are believed to have dominated Farth's first (primary) atmosphere?
(A) H & He
(B)N2&O2
(C)H2O &O_{2
(D)CO2&O_{2 T
(E) He &O₂}}

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增