题目

一个正数的两个平方根为m+1和m－3，则m=            ． 答案： 1  ；         Every minute, many millions of people around the world are on line. What do they do on the Internet? Fred, a reporter from Evening News is interviewing some people. Here is what they have said. Jim A. I talk with some old friends from school. I can find them on the Internet. There’s a cool new website (网址) where I can find people. So I put in a friend’s name, and there he is! Mike B.I often check out some book sites. I like to buy some books on line ,because some of the books can’t be found in bookstores. It’s great! Ave C. Every morning I read the news on line and catch up on all the sports results. I don’t have to take newspapers to my office. Lucia D. I always check out the charge（费用） for my phone call and my telephone record. Sometimes I pay on line. M ary E. I often go traveling on business. To order train tickets on line is much easier and faster。And I can get the tickets in my office or at home. 根据上面被采访者所说的话，找出相应得网址。 1. http ://www.train.cei.got.cn 2. http ://www.dailynews.corn 3. http : //www.bookfm385.com/free 4. http : //www.cnctelecomrnunication.corn 5. http ://www.friendnetfind.info