In this article, the writer mainly wants to tell the readers______.
A. that the universe is so large that we cannot imagine it
B. where the planets in the universe came from
C. how the high mountains were formed on the sun
D. why the tides over the surface of the sun were so powerful
正确答案：B
50．答案为B从全文整体来看主要讲述的是行星的形成过程因此选B
