问题
填空题
已知y=(a-3)xa2-2a-1-2是二次函数，则a=______．
答案
根据题意可得a2-2a-1=2
解得a=3或-1
又∵a-3≠0
∴a≠3，
∴a=-1．
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已知y=(a-3)xa2-2a-1-2是二次函数，则a=______．
根据题意可得a2-2a-1=2
解得a=3或-1
又∵a-3≠0
∴a≠3，
∴a=-1．
My mind seems always to return to the day when I met Carl. The city bus stopped at a corner to the passengers(乘客).1 was included. After getting on the bus, I looked for a place to sit. At last, I found a seat near the back. The passenger of the next to the one I was going for was an old man in a grey suit. Seated myself, I began to read the book I had been carrying which was Jack Kerouac's On the Road. The man in the seat next to me introduced himself by asking if I any other book like the one I was holding. When I told him I had, he seemed to become and so did I. He said he was Carl. And asked if I like jazz(爵士乐),and l told him that I didn't really listen to it and that I like rock and roll. Waiting for Carl to tell me that I listen to real music, I was shocked when he just smiled and nodded. He said, "You me of myself when I was your age. I remember how my parents hated jazz, how they couldn't see how I could listen to that terrible noise. I bet your parents say the same thing, don't they?" Now it was my to smile and nod. As the bus took us from one side of the city to the' other, Carl and I talked about a lot of different things. The more we talked, the more amazed I became at the two of us really had in common, although we had the difference. I haven't seen him we parted, but the thought of our relationship that day never leaves my mind.
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