题目

如图，矩形的面积为，它的对角线与双曲线相交于点，且，则________． 答案：【答案】12【解析】试题由题意，设点D的坐标为（x，y），则点B的坐标为（，），所以矩形OABC的面积，解得∵图象在第一象限，∴.阅读理解。     According to the recent survey, only forty percent of children in our school feel happy, Why?     Do you know what "happiness" means? A lot of money? No homework every day? High marks or anything else?     In fact, happiness is always around you put your heart into it. When you are in trouble at school, your friends will help you; When you study hard at your lessons, your parents are always taking good care of your life and your health; When you get success, your friends will say congratulations to you; When you do something wrong, people around you will help you to collect it; When you do something good to others, you will feel happy, too. All these are happiness. If you notice a bit of them, you can see that happiness is always around you. All these can't be bought with money. It's a feeling of your heart. When you come across difficulties, you can say loudly you are very happy, because you have more chances to challenge yourself.     As the saying goes, lift is a revolving door. When it closes, it also opens. If you take every chance you get, you can be a happy and lucky person. 1. When you fail in the exam, both your teacher and your classmates will _____ to make you happy.A. laugh at you B. play jokes on you C. help you D. quarrel with you2. What will your friends say to you when you get high marks?A. Good luck! B. Congratulations. C. Just so-so. D. Is that so?3. In the writer's opinion, _____ can make you happy.A. no homework B. high marks C. peace of mind D. money4. Which of the following is this passage about?A. Life. B. Happiness. C. Good luck. D. Chance.5. How many examples are given to show the meanings of happiness?A. 5. B. 7. C. 4. D. 6.