A: Hello, Kate! I'm doing a survey about learning English. Can I ask you some questions?
B: .
A: ?
B: I learn English by reading aloud. I am crazy while learning it.
A: ?
B: I like surfing the Internet and e mailing people in English.
A: ?
B: Yes. It can improve my English.
A: Sounds great. I hope you can be more successful. .
B: You are welcome.
;
泪 孩 改
呆 念 拿
,
,那么( )
B .
C .
D .
上的两点,将抛物线C1向左平移,得到抛物线C2 , 点A,B的对应点分别为点A',B'.若曲线段AB扫过的面积为9(图中的阴影部分),则抛物线C2的解析式是( )
B .
C .
D .
