五氯氢氧化钼(双二氯化钼氯氢氧化钼复盐)

THIS IS AMERICA - PETA at 25: Animal Rights Activists Are De

THIS IS AMERICA - PETA at 25: Animal Rights Activists Are Defended, Deplored By Jerilyn Watson Broadcast: Monday, October 24, 2005 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English.

发表于:2019-01-02 / 阅读(83) / 评论(0)

This is America

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Humulone 律草酮 Huperzine Serrate P.E 千层塔提取物 Hydroginkgolic acid 氢化白果酸 Hydroginkgolinic acid 氢化白果亚酸 p-Hydroxyacetophenone 对羟基苯乙酮 p-Hydroxybenzylalcohol

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医务英语

VOA标准英语2012--Researchers Say Malaria Drug Could Also Treat Cancer

Researchers Say Malaria Drug Could Also Treat Cancer Scientists know that human cancer cells grow by getting energy from adjacent tumors, where cells have begun to self-destruct. The spread of cancer is accelerated by the death of these cells. This p

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VOA标准英语2012年(三月)

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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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

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自然百科2009年

上海科学家研发防水耐火纸有助纸质文物保存

In January 2015, a fire in one of Russia's largest university libraries damaged more than 1 million historical documents, an incident which some media described as a cultural Chernobyl. 2015年1月，俄罗斯最大的大学图书馆之一发生了火灾

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angioma arteriale racemosum