已知二次函数y=ax²+bx+c（a≠0）的图象如图所示，有下列结论：①a＞0，b＞0；②c＜0，△＜0；③c-4b＞0；④4a-2b+c=16a+4b+c．其中正确结论的个数是（　　）

下列运算正确的是（   ）

如图所示是新疆的主要地形区，排列正确的是（　　）

      The man is his father. His name is Mike. He is a teacher in No. 3 High School. 62. Dave's mother is next to his father. She is a nurse in Ren'ai Hospital. The girl in red is Betty. She is Dave's sister. She is twelve. She is in Grade 7 in No. 3 High School. Who is that boy in a cap? It's Dave. He looks like his father. Dave and Betty are in the same school, but in different grades. Dave is in Grade 8. Oh, who are the old man and woman on the sofa? They are Dave's grandparents. They are old and they live with their children(孩子) now.
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