[化] 氯化氰定

[单词解析速记].JV447.(Yoke.and.Vapid)

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发表于:2018-12-04 / 阅读(170) / 评论(0)

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常春藤解析英语

It's Not Easy Being a Kid!

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发表于:2018-12-14 / 阅读(172) / 评论(0)

儿童英语故事三

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一起闲话英语-English Chitchat

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单词解析速记

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[单词解析速记].JV542.(Penchant.and.Intrepid)

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名人轶事:IdaTarbell,1857-1944: She Used Her Reporting Ski

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Many Congolese Still Need Emergency Aid Humanitarian agencies are still trying to reach thousands of people in the eastern DRC who were displaced by the recent military offensive by M23 rebels. Many of the displaced fear they may have to flee violenc

发表于:2019-01-14 / 阅读(163) / 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

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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

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the Perseid meteor shower

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趣味英语

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地道美语播客

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BEIJING, Jan. 3 (Xinhua) -- A policy that requires users to use their real names when registering for Internet access has triggered heated discussion, with some for and some against it. On Dec. 28, China's top legislature passed rules on protecting o

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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。

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《海底两万里》中英双语有声读物

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学英语单词

amphipathic, amphipath

anounce

average composite sample

aviation life support equipment

barings

base band distribution

base resin