[化] 氯化氡

大学英语自学教程下UNIT6

[00:00.00]Unit 6 text A Improving Industrial Efficiency through Robotics [00:04.24]通过机器人技术提高工业效率 [00:08.49]Robots,becoming increasingly prevalent in factories [00:14.73]and industrial plants throughout the developed world, [00:17.41]在机

发表于:2018-12-04 / 阅读(178) / 评论(0)

大学英语自学教程下

VOA标准英语2014--新的太阳能电池减少生产中对环境的危害

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发表于:2018-12-08 / 阅读(146) / 评论(0)

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有声英文阅读-预测地震

Predicting Earthquakes Can earthquakes be predicted? Scientists are working on programs to predict where and when an earthquake will occur. They hope to develop an early warning system that can be use

发表于:2018-12-31 / 阅读(111) / 评论(0)

有声英文阅读

双语有声阅读:Predicting Earthquakes 预测地震

Can earthquakes be predicted? Scientists are working on programs to predict where and when an earthquake will occur. They hope to develop an early warning system that can be used to forecast earthquakes so that lives can be saved. Earthquakes are the

发表于:2019-01-02 / 阅读(120) / 评论(0)

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美国国家公共电台 NPR Retailers Plan To Clear Deadly Paint Removers From Shelves, As EPA Delays Ban

DAVID GREENE, HOST: Families across the United States are fighting with the federal government over a deadly chemical. Dozens of people have died from inhaling methylene chloride. This is an ingredient in common paint removers. NPR's Rebecca Hersher

发表于:2019-01-17 / 阅读(141) / 评论(0)

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科学美国人60秒 SSS 2016-1-1

Every winter some twenty million tons of salt are dumped on America's road.That sodium chloride melts the ice, so it prevents its formatin, helping to prevent accidents. But road salt has its downside. This is not very economical because salt is main

发表于:2019-01-20 / 阅读(197) / 评论(0)

2016年Scientific American(一)月

英语听力：自然百科为什么海水是咸的？

This week on Why Tell Me Why, we are finding out why the oceans are so salty. So the oceans are salty because the oceans have been around, lets say, for over five hundred million years. And over the course of time what we found out is that weve alway

发表于:2019-01-22 / 阅读(140) / 评论(0)

自然百科2009年

ESL Podcast 390 – Dietary Restrictions and Preferences

Tony: Who did you invite over for dinner Saturday? Carmela: I invited Keith, Sung, Stephanie, and Luis. Tony: You didnt! Carmela: I did. Why? Tony: Youre going to have a hard time cooking for them. Keith is a vegan and only eats food thats organic. S

发表于:2019-02-04 / 阅读(135) / 评论(0)

地道美语播客

求职信范例：应聘实习销售代表

对于即将走出校门的毕业生来说，一封吸引人的求职信是进入理想企业的敲门砖。下面就是一位毕业生应聘实习销售代表的求职信。这封信言辞恳切，并且突出了他建立良好人际关系的能力。

发表于:2019-02-09 / 阅读(104) / 评论(0)

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英语听书《海底两万里》第170期第12章一切都用电(3)

First off, I'll mention that at the bottom of the sea there exist veins of zinc, iron, silver, and gold whose mining would quite certainly be feasible. 首先，我对您说，海底有锌、铁、银、金等矿藏，开发并不是不可能的事。

发表于:2019-02-25 / 阅读(234) / 评论(0)

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学英语单词

admission valve

arbat

automatic cheese winding machine

canalis pterygopalatinusp