题目

把的图像沿轴向下平移5个单位后所得图象的关系式是（ ）A. B. C. D. 答案：【答案】C【解析】直接利用一次函数平移规律，“上加下减”进而得出即可．将一次函数y=2x+1的图象沿y轴向下平移5个单位，那么平移后所得图象的函数解析式为：y=2x+1-5，化简得，y=2x-4．故选：C．Vanilla is my best friend. She is a lovely girl with two big,beautiful eyes. But she always hides them behind a pair of black glasses.One day,though,I nearly ended our friendship. I remember that day clearly. We were sitting in class. The teacher was giving us our results for a Chinese test. I had done badly. I felt so sad that I wouldn't talk to anyone. At lunchtime,I even stayed in the classroom alone. Suddenly, I heard a voice. It was Vanilla. u You look very unhappy," she said.14 What's wrong?" I looked at her,but said nothing. I knew Vanilla had got a good mark in the test. I thought she was making fun of me. I stayed silent,but Vanilla didn't go away. She kept asking me questions, "Is it because of the exam? Do you want me to show you the right answer?" I looked away from her. When I looked up again,Vanilla had gone. And so had my exam paper!I didn't know what to do. I looked everywhere for my paper,but couldn't find it.In the afternoon, Vanilla came up to my desk and gave me my exam papers back. I looked at it and got a big surprise. Vanilla had written the right answer next to every one of my mistakes. My face went red. Vanilla had been trying to help me all along. How mean I had been to her when she was so nice. I wanted to hug her,but all I did was to hold her hands and say, uThank you. " That afternoon,Vanilla and I walked home together. I felt so happy that I thanked her again. We were still best friends.(   ) 6. The writer felt sad because        in the Chinese test.   A. she got a good mark   B. Vanilla had done better than her   C. she didn't have a good mark   D. the teacher was angry with her(   ) 7. Vanilla really came to the writer to         .   A. make fun of her   B. find out what had happened to her   C. play with her   D. show her the right answers(   ) 8. Vanilla left the writer because she         .   A. wanted to write the right answers for the writer   B. didn't know what to do to help her friend   C. was angry with the writer   D. wanted to go home for lunch(   ) 9. The underlined word "mean" probably means         .   A. helpful   B. friendly   C. unkind   D. useless(   ) 10. Which of the following is NOT true?    A. The writer thought Vanilla came to laugh at her.   B. Vanilla is a friend in need.   C. Vanilla was helpful.   D. The writer was still angry with Vanilla.