问题
填空题
抛物线y=
|
答案
∵a=-2＜0，
∴抛物线开口向下，对称轴是x=-
=b 2a
，5 8
又y=
=-4ac-b2 4a
，39 32
∴顶点坐标是（
，-5 8
）．39 32
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抛物线y=
|
∵a=-2＜0，
∴抛物线开口向下，对称轴是x=-
=b 2a
，5 8
又y=
=-4ac-b2 4a
，39 32
∴顶点坐标是（
，-5 8
）．39 32
| 完形填空。 | ||||
| One night I decided to spend some time building a happier and closer relationship with my daughter. For several weeks she had been 1 me to play chess (棋) with her, so I suggested a game and she eagerly 2 . It was a school night, however, and at nine o'clock my daughter asked if I could 3 my moves, because she 4 to go to bed; she had to get up at six in the morning. I 5 she had strict sleeping habits, 6 I thought she ought to be able to 7 some of this strictness. I said to her, " 8 , you can stay up late for once. We're having 9 ." We played on for another fifteen minutes, during which time she looked 10 . Finally she said, "Please, Daddy, do it quickly." "No," I replied. "If you're going to play it 11 , you're going to play it slowly." And so we 12 for another ten minutes, until 13 my daughter burst into tears, and 14 that she was beaten. Clearly I had made 15 . I had started the evening wanting to have a 16 time with my daughter but had 17 my desire to win to become more 18 than my relationship with my daughter. When I was a child, my desire to win 19 me well. As a parent, I 20 that it got in my way. So I had to change. | ||||
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