金属管道工程中，最常用的连接方式是（）。A、焊接连接 B、粘合连接 C、胀接连接 D 发布时间：2019-11-15 16:21 │ 来源：www.tikuol.com 题型：单项选择题 问题： 金属管道工程中，最常用的连接方式是（）。A、焊接连接B、粘合连接C、胀接连接D、承插连接
题型：单项选择题 阅读下面的短文，把A-E五个句子填入文中空缺处,使短文内容完整正确。 Should mobile phones be allowed at school? __1__ Some mobile phones are more than just phones -they are being used as radios, cameras and MP4 players, and they are also used to send e-mails or surf the Internet. __2__ People have different ideas about whether students should use mobile phones at school or not. __3__ If their parents have something important to tell them, they can call their teachers for help. If someone's mobile phone rings during a Chinese class, he and his classmates can't concentrate on what the teacher is saying. Some parents also point out that their children often use their mobile phones to download (下载) unhealthy information from the Internet. __4__ Other people believe that we can find some ways to use mobile phones to help students learn better in the classroom, since many of today's mobile phones are like mini computers. And children usually know more than adults about how to use new technology (技术). __5__ What are your answers to the question?A. They are really worried about this.B. Some of them can even be used as mini computers.C. More and more students are using mobile phones a school now.D. Why not use mobile phones in the classroom?E. Some people think that students don't really need mobile phones. 查看答案