问题
选择题
若抛物线x2=2py（p＞0）的焦点在圆x2+y2+2x-1=0上，则抛物线的准线方程为[ ]
A.y=-1
B.y=1
C.x=-1
D.x=1
答案
答案：A
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若抛物线x2=2py（p＞0）的焦点在圆x2+y2+2x-1=0上，则抛物线的准线方程为[ ]
A.y=-1
B.y=1
C.x=-1
D.x=1
答案：A
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was always 1_____ and didn't like to talk to others. However, one day, her mother gave her a beautiful hairclip. When she 2______ it, she looked much more beautiful than 3______. She decided to wear it to school. On her way to school she found that 4______ who saw her smiled at her. Most of her classmates said "Hello" to her, but this 5______ happened before. She thought that the beautiful hairclip had brought her them all. She was so happy about all of the wonderful things. 6______ she didn't tell her classmates about her beautiful hairclip, they all wanted to know what had 7______ to her. When she went back home after school, her mother asked her, "Do you know you 8______ your hairclip? I found it by the door this morning." She understood 9______ she hadn't worn the hairclip to school at all. It is not important what we wear and how we look. The most important is how we think about 10______. |