用所给动词的适当形式填空。 Many years ago，people 1 (think)the sun went round the earth，and the earth went around the moon．In some countries people even said the sun was a
When Glen Kruger picked a small cat from an animal shelter, he did not expect much. Yet right from the start, eight years ago, there was an uncommon connection between him and the small black cat.
若
与
的大小关系为 
的图象开口向上，对称轴为
，因
，故
，从而
，又
，所以
的对应点到对称轴的距离大于
的对应点到对称轴的距离，故