Hi,
订阅
报纸
纸质报纸 电子报纸
手机订阅 微商城
英语
学习
双语新闻 翻译协作
英语听力 国际学校
口语
演讲
精彩视频 名人演讲
演讲技巧 口语训练营
教育
资讯
新闻资讯 语言文化
备课资源 经验交流
用报
专区
中学Teens
小学Kids
21英语教师网 > 备课资源 > 拓展阅读 > 正文
How do they make it so clean?
作者:21ST    来源:初中版第32期    日期: 2011-05-10
牛津版初二年级:Water talk

关键词:water

话题归类:科普知识Popular science


滴水要经过多少考验才能来到你家呢?


HOW does water get from the river or lake to your home? That's quite a long way. Let's just follow some to see where it goes:

1. People put chemicals (化学药品) into water to take out dirt (污垢) and other small things. The chemicals make dirt stick together and become heavy. Then, it all goes to the bottom (底部). The clear water moves on.

2. The water goes through filters (过滤器). The filters are made of sand (沙粒), gravel (砾石) and charcoal (木炭). They take out even smaller pieces of dirt.

3. People put some chlorine (氯) into the water to kill bacteria (细菌). Sometimes you can taste (尝到) the chlorine in water when you drink it.

4. Water goes into a clean place for keeping. Then it goes through pipes (管道) to shops, offices and homes.



关键词:牛津版 初二 Water talk 科普知识Popular science



相关文章





 

Most Popular

 
热点翻译问题

 
 
标题
内容
关闭
内容
联系我们   |    广告业务   |    诚聘英才   |   演讲比赛   |   关于我们   |   手机访问
有意与本网站合作者,有关合作事宜请联系我们。未经21英语网书面授权,请勿转载或建立镜像,否则即为侵权。
主办单位:中国日报社 Copyright www.i21st.cn All Rights Reserved 版权所有 复制必究   京ICP备13028878号-12   京公网安备 11010502033664号