标签：Chlorine 相关文章

2007年VOA标准英语-Coalition Faces Two New Insurgent Tactics in Ir

By Al Pessin Washington 22 February 2007 The second-ranking U.S. commander in Iraq says his forces are working to counter two new capabilities developed by insurgents -an improved ability to shoot down helicopters and a new type of bomb that involves

发表于:2019-01-12 / 阅读(88) / 评论(0) 分类 2007年VOA标准英语（二月）

英语听力文摘 English Digest 155、游泳会染上细菌？

Everybody loves the swimming pool. But how clean is the water in the average backyard or public pool? If you trust chlorine to take care of germs, you're in for a surprise. Chlorine and other disinfectants do indeed help to clean the water, but some

发表于:2019-02-24 / 阅读(89) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 234、游泳池里的细菌

Swimming With Germs 到游泳馆游泳消暑逐渐成为市民推崇的运动之一。尽管游泳馆都要求游泳者必须办理健康证，但健康证多流于形式，无法起到防范的作用。目前，市内一些大的游泳馆的水质基本

发表于:2019-03-09 / 阅读(208) / 评论(0) 分类 英语听力文摘 English Digest
最新学习文章
热门学习文章