[化] 亚乙基丙酮; 甲基·丙烯基酮; 甲基·丙烯基甲酮

[单词解析速记].JV447.(Yoke.and.Vapid)

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发表于:2018-12-04 / 阅读(101) / 评论(0)

单词解析速记

VOA慢速英语2014 科学家们寻找新的方法来对付蚊子

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2014年VOA慢速英语(五)月

常春藤解析英语【62】Five Minutes to Midnight

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常春藤解析英语

It's Not Easy Being a Kid!

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儿童英语故事三

VOA常速英语2015--新型简单测试或能检测出糖尿病早期迹象

Simple New Test Detects Early Signs of Diabetes 新型简单测试或能检测出糖尿病早期迹象 People with Type 1 diabetes, usually diagnosed in children and young adults, must take insulin injections and watch their diet to keep their blood

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VOA双语新闻：3、美科学家研发新一代驱蚊剂

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VOA双语新闻 2014年1月

科学美国人60秒 SSS A Green Solution to Improve Indoor Air Quality

Air pollution outside is easy to spot, hanging over the city, or sputtering from a tailpipe. But there's lot of indoor air pollution, too, even if it's not as obvious. It's caused by volatile organic compounds, or VOCs. They can come from building ma

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2016年Scientific American(八)月

【一起闲话英语】去取身份证—Getting an ID card

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一起闲话英语-English Chitchat

[单词解析速记].JV517.(Vivid.and.Inane)

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单词解析速记

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

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单词解析速记

VOA常速英语2014--Promising Mosquito Repellent Announced 美科学家研发新一代驱蚊剂

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趣味英语

China reviews anti-dumping measures on Japanese chloroprene rubber

BEIJING, Aug. 8 (Xinhua) -- China on Wednesday started to review anti-dumping measures it imposed on chloroprene rubber imported from a Japanese company, the Ministry of Commerce said. The move came after the ministry received complaints that Japan E

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英语新闻

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On its website, a history of the company makes no mention of leador indeed of Thomas Midgleybut simply refers to the original product as containing a certain combination of chemicals. 在它的网站上，公司的历史没有提及铅──也没有提

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万物简史

万物简史第225期:把铅撵出去(14)

By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo

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万物简史

万物简史第213期:把铅撵出去(2)

Lead is a neurotoxin. Get too much of it and you can irreparably damage the brain and central nervous system. Among the many symptoms associated with overexposure are blindness, insomnia, kidney failure, hearing loss, cancer, palsies, and convulsions

发表于:2019-02-17 / 阅读(113) / 评论(0)

万物简史

10 Benefits of Rising Early, and How to Do It

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TED演讲获奖青少年,科技在行动(1)

If you were going to a restaurant and wanted a healthier option, 如果你去饭店，你想吃得健康一点， which would you choose, grilled or fried chicken? 你会选择哪种食品呢，烤鸡还是炸鸡？ Now most people would answer grill

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Bacterium pseudoanthracis