在平面直角坐标系中，抛物线y=﹣ $\frac{1}{2}$ x²+bx+c与x轴交于点A，B，与y轴交于点C，直线y=x+4经过A，C两点．

    Wouldn't it be funny if your mum said to you, "It's time for bed, honey. It's almost November!" Well, if you were a baby bear, your mother might let you know it's time to go into a deep sleep around October.

    That "deep sleep" is called "hibernation (冬眠)". When it gets cold, bears have to go into hibernation. By taking this long sleep, they can get through the cold months when the food, like berries (浆果) and nuts, cannot be found easily.

    Have you ever heard someone say that they are as hungry as a bear? Bears need to eat a lot of food before hibernating. They eat so much that they may put on forty pounds of fat in a week. During the winter "bears will live off the fat stored in their bodies. Bears are able to do that because their bodies use a lot less energy during hibernation. Their heartbeats slow down, their breathing slows down, and their body temperature drops.

    If you were going to sleep all winter, wouldn't you want to be in a safe and protected place? That is what a bear wants, so it looks for a cave to sleep in. It makes a bed using grass, leaves and twigs (嫩枝). The bear usually starts to hibernate as early as October and doesn't wake up until April or May. By the time the bear wakes up, it will have lost much of the fat. But spring time will bring much food to enjoy until it is time to hibernate again in the autumn.

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　The Ugly Duckling(丑小鸭)

The mother duck had eight little yellow ducklings, but one of them was different from the others. They called him ugly duckling.

“You are an ugly duckling, ”the other ducklings said. “You don’t look like us. We don’t want to play with you. ”

“You have made fun of me since I was born, ”the poor duckling said sadly(难过地). “You have hurt(伤害)me for years! I don’t want to stay here any more. ”

So he left(离开)them and tried to find a happy place. Finally, he came to a lake. Many beautiful swans(天鹅)were there. The ugly duckling swam to them.

“Hello, little one. I’ve never seen you before. Where are you from? ”One of the swans saw him and asked.

“Hello, I came from a place far away. I walked a long way. Now I’m tired. Can I join you? ”

“Sure, you are welcome, my dear child, ”the swan answered.

“You’re just one of us! ”

The ugly duckling was very happy, but a little surprised. He looked at himself in the clear water. Instead of(代替)an ugly duckling, he saw a beautiful swan. It was himself!

He became the most beautiful swan of them all.

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