题目内容:
According to Lemaitre, the separate galaxies formed
A.during a pause in the expansion of the universe B.at the time of the primeval explosion
C.and will continue to form for ever
D.when all the matter in the universe was all concentrated in one small mass
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: