标签：空气过滤器 相关文章
If a man could start out when the sun rose in the morning and keep up with it all day long, 如果一个人能在早晨太阳升起的时候出发，一整天都跟着太阳走， go over the side of the world when the sun set and keep up with it on
美国学生世界地理教材
[全屏观看] 点击右键- 另存为 可保存这个Flash影片
大学六级6000单词速记动画版
一个英语单词可分为三部分：前缀（prefix）词根（root）后缀（suffix）。位于词根前面的部分就是前缀。前缀，可以改变单词的意思。 as-, at-, 加在同辅音字母的词根前，表示加强 assure = as + s
英语PK台
栏目简介： 很多人都说中国人喜欢说客套话，该客套的时候客套，不该客套的时候，大家都在客套。不光是中文，在英文中客套的词语也是满天飞。今天，Jeremy老师就将为您教授英语中的客套
英语客套话
Heavy air on this Moment of Science. Here's an oxiny question: does air weigh anything? At first it might seem preplexing, on the one hand, air just seems floating, I mean, to say something is as light as air is to say its weighlessness, is isn't? Bu
英语时差8，16
双元音[eə] 发音要领: [eə]是集中双元音一一舌位:发音时，舌头从前元音[e]的位置上开始移向[ə]，形成的音便是[eə]；唇形:非圆唇；声带:振动。 技巧提示： 避免把[eə]发成[ə] 。 有些初学者把
英语国际音标
我们每天都不假思索地免费使用地球上的资源。如果我们必须为此支付一定款项，我们是不是会更珍惜这些资源并减少浪费呢？作为一个大自然的银行家，Pavan Sukhdev为地球上的资源估了价。启
TED公开课:环境 重造计划
Water The world is not only hungry,but also is short of the water.This may sound strange for 70% of the surface of the use is covered by water.But 97% of this is sea water or soft water.Man can only use the other 3% fresh water that country rivers,la
高考英语作文高分必备
Water Pollution 水污染 Can you see a curved fish? 你看到过畸形鱼吗？ Curved fish live in dirty water. 畸形鱼生活在污水中。 Curved fish started to appear because of water pollution. 它们的出现是因为水污染。 How does w
与美国小学生一起学英文第6册
How Nan Saved Sally 南是如何解救莎莉的 It was Sally's birthday, and Mother had made her a cake with even candles on it. 莎莉的生日到了，妈妈给她做了一个蛋糕，上面还放了蜡烛。 Mother, Sally, and Nan went to the beac
美国小学英语教材2
AS IT IS 2015-09-23 Delhi Tries to Clear Traffic, Air with Car-Free Day 德里试图开展无车日减少交通、净化空气 September 22 is known on the Internet as World Car Free Day. People were urged to leave their motorized vehicles at home an
2015年VOA慢速英语(九)月
WHO: 80% of Urban Residents Breathe Unsafe Air 80%城镇居民呼吸的空气不安全 From VOA Learning English, this is the Health Lifestyle report. 这里是VOA慢速英语健康生活频道。 A new study finds that more than 80 percent of people
2016年VOA慢速英语(六)月
Lesson 117 Fresh! 1.Fresh!好帅啊！ 2.Just like fresh air.宛如清新的空气。 3.Let in some fresh air.放点新鲜空气进来吧。 4.Give me some fresh bread,please.请给我一些新鲜的面包。 5.Let's make a fresh start!咱们重新开始
辛沛沛NO-BOOK 辛沛沛傻瓜机口语极短句
Lesson 70 Evaporation 第70课 蒸发作用 Let us fill a small kettle with water, and place it on the fire. The water will soon begin to boil. After an hour or so we shall find the kettle quite empty, although no one has touched it since it was plac
英国学生科学读本
The aptly named Salt Restaurant in Shiraz, southern Iran, is completely made of salt. The walls, bar, tables and chairs are entirely made of the white mineral; even the stairs have a smooth, salty coating. 在伊朗南部城市设拉子，有一家完全
阅读空间
German Car Manufacturer Audi Creates Fuel From Air And Water 奥迪用空气和水合成新燃料 Creating an alternative green or carbon neutral fuel to replace gasoline has been the holy grail for scientists for many years. However, while there has
阅读空间
An announcement to welcome students to join to a club Welcome to our club 1、本社团的主要活动内容 2、参加本社团的好处 3、如何加入本社团 There is a general discussion today about the issue of clubs in universities. This clu
英语四级作文范文
Dutch inventors have unveiled what they called the worlds first giant outside air vacuum cleaner a large purifying system intended to filter out toxic tiny particles from the atmosphere surrounding the machine. 荷兰发明者公布了他们所谓的世
英语新闻
Air pollution 空气污染 The big smoke 雾都 Britain needs to do more to clean up its dirty air 英国需要采取更多措施来净化污浊的空气 VISITING Oxford Street, a road teeming with tatty shops and overcrowded with people, is plainly
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