题目

用小棒按照如下方式摆图形。 （1） 摆1个八边形需要8根小棒，摆2个八边形需要根小棒，摆3个八边形需要根小棒，摆30个八边形需要根小棒。 （2） 如果想摆n个八边形，需要根小棒。 （3） 有2010根小棒，可以摆个这样的八边形。 答案：【1】15【2】22【3】211 【1】1+7n 【1】287阅读理解。     The Internet has become part of teenage life. A new report on 3,375 students aged from 10 to 18 in seven Chinese cities found that 38 percent of them believe they use the Internet often.      While most of them get useful information and use the Internet to help in their studies, some are not using it in a good way. Many are playing online games too much.. A few even visit websites they shouldn't look at. Hong Ying, a teacher from Beijing Yinghua Middle School warns that bad things can happen if young people spend too much time on the Internet. She had a student who used to be good at school. But then hestarted visiting sex websites. He went mad, cheated a girl and was taken away by the police.      In order to help young people use the Internet in a good way, a textbook on good Internet behavior hasstarted to be used in some Shanghai middle schools this term.      The book uses real examples to teach students all about good ways of using the Internet. The book givesuseful advice such as it's good to read news or to find helpful information to study. Teachers and parents all think the book is a very good idea.      Hong said the book will be a guide for teens using the Internet. She believes it will keep students awayfrom bad websites. 判断正误。(     ) 1. About 1282 among the 3375 students believe they use the Internet very often. (     ) 2. Not all children are using the computer in a good way.  3. 将文中划线句子翻译成汉语。    ______________________________________________________________________4. What's the textbook about?     ______________________________________________________________________5. What's the aim of the book?     ______________________________________________________________________