Some two thousand million years ago, the mountain on the sun was raised probably because______.
A. the star moved away from the sun
B. another star happened to come near the sun
C. fhe sun and the moon raised the tides on the earth
D. a large tidal wave of a star travelled over the surface of the sun
正确答案：B
47．答案为B根据第二段的前两句Webelievehoweverthatsometwothousandmillionyearsagoanotherstarwanderingthroughspacehappenedtocomenearoursun．Justasthesunandthemoonraisetidesontheearthsothisstarmusthaveraisedtidesonthesurfaceofthesun和生活常识可知潮汐是由于星球接近时造成的引力而产生因此选B
