[机] 五氟化锑

SSS 2010-12-29

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Beauty is only skin deep. And the beauty of shiny white teeth is even less deep. Because a new study shows that fluoride forms a thinner protective shiel

发表于:2018-12-02 / 阅读(193) / 评论(0)

Scientific American(十二)月

小学三年级英语(人教新课标版)上册 Unit 1 Hello - B Let’s tal

小学三年级英语,人教新课标版

发表于:2018-12-04 / 阅读(152) / 评论(0)

人教版小学三年级英语上

汪培珽书单（四） Arthur's Pen Pal

Sorry,thereisnottexttemporarily,Pleasehelptingroomtolookforit! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! 汪培珽分级书单（MP3+绘本） TOP50初级英文绘本

发表于:2018-12-06 / 阅读(266) / 评论(0)

王培廷分级书单四亚瑟系列

访谈录 2009-12-10&12-12 中国玩具zuzu身在曹营心在汉

The most popular toys this holiday season, as you know, if you're a parent, are zhu zhu pets. They're little robot hamsters that move around or something and there're people going crazy for them. Zhu zhu pets are manufactured in China, and over the w

发表于:2018-12-07 / 阅读(294) / 评论(0)

访谈录2009

Dental Health

07 牙病的预防与治疗 DATE=2-27-01 TITLE=SCIENCE IN THE NEWS #2113 - (1)Dental Health BYLINE=Nancy Steinbach VOICE ONE: This is Sarah Long. VOICE TWO: And this is Bob Doughty with Science in the

发表于:2018-12-07 / 阅读(146) / 评论(0)

科技之光

新目标初中英语七年级上--Unit 2 Is this your penci

UNIT 5 What color is it? [00:05.69]Section A Activity 1b. [00:11.55]Listen to the conversations [00:15.78]and then match the letters with their colors. [00:20.92]Conversation 1 [00:24.48]A:What's this,Wendy? [00:27.82]B:It's a letter W. [00:31.58]A:W

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新目标初中英语七年级

英语歌曲:Attal, Mattal

发表于:2018-12-13 / 阅读(199) / 评论(0)

Wee Sing Around the World

英语学习乐园：Is this your pen?

正文： 1、Is this your pen? Yes,it is. 2、Is this your pencil? Yes,it is. 3、Is this your book.？ Yes,it is. 4、Is this your watches？ Yes,it is. 5、Is this your coat? Yes,it is. 6、Is this your dress? Yes,it is. 7、Is this your skirt? Ye

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英语学习乐园

口腔临床英语对话第29期:正畸治疗(2)

Is it necessary to have cavities in the baby teeth repaired? 乳牙蛀成了洞还有必要补上吗？ If the baby teeth are going to fall out, I don't think that it matters if they become decayed. 如果乳牙是要脱落的，我想蛀了也没有关

发表于:2018-12-27 / 阅读(180) / 评论(0)

口腔临床英语对话

英语课程计划-Pen Pal Day

June the 1st is Pen Pal Day. Im sure most of us have had a pen pal at one time in our lives. Many of us still have one. Today is the day to say thank you to your pen pals. It is also the day to thank your key pals too. Nowadays, most people communica

发表于:2018-12-29 / 阅读(187) / 评论(0)

英语课程学习计划和讲义

嘟嘟少儿英语4级DVD6单元真人秀pen friends

Sorry,there is no text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得 10 到 30 积分的奖励 ! Thank you ！

发表于:2019-01-10 / 阅读(220) / 评论(0)

英国原版Beep嘟嘟剑桥少儿英语

2006年VOA标准英语-Arcelor, Mittal Announce Merger to Create World

By George Dwyer Washington 28 June 2006 Watch steel report The world's second largest steel producer, Arcelor Steel of Luxembourg, has announced it will merge with the world's largest steel company, Netherlands-based Mittal. The deal, announced on J

发表于:2019-01-13 / 阅读(216) / 评论(0)

2006年VOA标准英语（六月）

VOA标准英语2010年-Coal Burning Linked to Fluoride Diseas

A cluster of villages in China's Guizhou province has been plagued by an outbreak of disease that damages teeth and bones. Now, a new study by Chinese and American researchers puts the blame on polluted coal burned in home fireplaces. In small quanti

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VOA标准英语2010年(十)月

科学美国人60秒 SSS 海狸牙齿的奥秘

Ah yes.The ol' fluoride rinse at the dentist. Not pleasant. But hey, good for your teeth, right? 没错，这是牙医洗牙用的含氟漱口水。确实够闹心的。但毕竟对你的牙齿有益不是吗? Well now materials scientists have been

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2018年科学美国人1月

粉红猪小妹第二季MP3 21 Pen Pal

图片1 图片2 图片3 图片4 图片5 图片6 图片7 图片8 图片9 图片10

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粉红猪小妹第二季

牛津少儿英语 let's chant 42 - Pencils and a Pen (group) - 26 s.

图片1

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Let's chant Let's sing

牛津少儿英语 let's chant 41 - Pencils and a Pen (solo) - 27 s.

图片1

发表于:2019-01-28 / 阅读(166) / 评论(0)

Let's chant Let's sing

SCIENCE IN THE NEWS - Dental Health

SCIENCE IN THE NEWS - November 26, 2002: Dental Health By Nancy Steinbach VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with Science in the News, a VOA Special English program abo

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科技之光

Inter penalised for protesting against referee

ROME, Oct. 3 (Xinhua) -- Inter have been hit with suspensions and fines following their protests in Saturday's controversial loss to Napoli. The Nerazzurri suffered a 3-0 defeat at the Stadio Meazza in a game where the decisions of referee Gianluca R

发表于:2019-01-31 / 阅读(168) / 评论(0)

英语新闻

学个词 Learn a Word-VOA英语教学 2280-fluoride

今天我们要学的词是 fluoride. Fluoride 氟化物。The U.S. government is lowering the recommended amount of fluoride added to drinking water for the first time in more than 50 years. 美国政府50多年来首次降低饮用水建议添加的氟

发表于:2019-02-02 / 阅读(146) / 评论(0)

英语单词荟萃

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学英语单词

air-setting refractory cement

al luhayyah (luhaiya)

Alchornea trewioides

Amphimerycidae

AMVRT

appeal to the country