题目

如图，函数的图象是折线段，其中的坐标分别为，则           ；            ．（用数字作答） 答案：2  -2 解析: f(0)=4，f(4)=2；由导数的几何意义知－2.阅读下面短文，用括号内所给动词的适当形式填空（必要时可加情态动词或助动词)。Mr. Baker worked in an office. Once he was asked to a friend’s birthday party. His friends knew he had a wonderful voice(声音）and asked him1.(sing) a few French songs. He did as his friends asked. And he was introduced to a beautiful girl who was born in a rich family.Soon they married(结婚）and her father2.(give)them a lot of money.They had their own house and cars.Mrs.Baker did nothing at home and they lived a happy life.Two years later,Mrs.Baker’s father died.they got into trouble(麻烦)at once.But Mrs.baker wasn’t good at3.(do)anything,so Mr.baker had to find another job to make more money.One evening he went home happily and said, “My friends help me 4.( find) a job in another office. I5. (go) to work tomorrow.My shirt is worn out( 破了），dear.Will you please make a new one for me?”“I’m sorry I 6.(not do ) it,”said the woman,”I have never made any shirts before, you know.”“7.(try) your best, dear.” said Mr. Baker,“I8.(like) my old shirt, please make a new one like it”“Well, let me try.The next morning , as soon as Mr. Baker9. ( get) up, his wife showed her husband the new shirt and said,”Try it on ,dear!”Mr.Baker had a look at the shirt and asked in surprise(惊奇地), “Why10. the new shirt _______(have) several holes in it?”Pointing to(指着) the old shirt, she said,”Look!There’re some holes in your old shirt,too.”