[化] 亚硝酰钌

麻省理工学院公开课：单变量微积分03：求导四则运算及三角函数导数

分集介绍：导数，商数，正弦和余弦 Derivatives.of.products.quotients.sine.cosine

发表于:2019-01-05 / 阅读(449) / 评论(0)

麻省理工学院公开课：单变量微积分

麻省理工学院公开课：单变量微积分01：导数和变化率

分集介绍：导数，斜率，速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(475) / 评论(0)

麻省理工学院公开课：单变量微积分

英语游戏:愚蠢的香肠

[全屏观看] 点击右键- 另存为可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏，它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标

发表于:2019-01-08 / 阅读(308) / 评论(0)

英语对接游戏

2006年VOA标准英语-Taylor Supporters Seek New Asylum Deal

By Joe Bavier Abidjan 27 March 2006 Compound of the house where former Liberian warlord Charles Taylor lives near the sea side town of Calaber Supporters close to deposed Liberian leader Charles Taylo

发表于:2019-01-13 / 阅读(256) / 评论(0)

2006年VOA标准英语（三月）

VOA标准英语2009年-UN: More People Seeking Asylum in Industrialize

A new report by the U.N. refugee agency finds the number of asylum seekers in industrialized countries increased in 2008 for the second consecutive year. It says asylum requests have been rising in part because of the higher number of applications f

发表于:2019-01-13 / 阅读(202) / 评论(0)

VOA标准英语2009年(三月)

VOA标准英语2009年-Greece Tears Down Camp for Asylum Seekers

The United Nations refugee agency says it is concerned about the fate of hundreds of irregular migrants, including asylum seekers and refugees, following the closure of a makeshift camp in the Greek city of Patras. The UNHCR says it fears many of th

发表于:2019-01-14 / 阅读(205) / 评论(0)

VOA标准英语2009年(七月)

VOA常速英语2008年-Hillary Clinton Faces Crucial Test in Pennsylva

By Jim Malone Washington 18 April 2008 Democratic presidential contender Hillary Clinton faces a crucial test in Tuesday's presidential primary in Pennsylvania. Clinton is counting on a convincing win over rival Barack Obama in Pennsylvania to keep a

发表于:2019-01-30 / 阅读(176) / 评论(0)

VOA常速英语2008年（四月）

HEALTH REPORT - New Heart Drug Shows Promise in African Amer

HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure

发表于:2019-01-30 / 阅读(251) / 评论(0)

健康与经济

音乐咖啡厅:Sylver给我你所有的爱-超炫电音舞曲

欧洲顶尖流行电子乐组合Sylver翻唱自ABBA经典歌曲的《Lay All Your Love On Me》，经过重新编曲带给你不一样的听觉体验。 Lay all your love on me-Sylver i wasn't jealous before we met now every woman i see is a potential threat and i'm possessive, it isn't

发表于:2019-02-03 / 阅读(295) / 评论(0)

音乐咖啡厅

英语杂谈：48 Asylum Debate Stirs Political Debate

A small corner shop in suburban Sydney is an unlikely place to hear the horrors that force people from their homes and into the devious and dangerous world of people smugglers. Hassan Abotbeek fled Iraq and arrived in Australia by boat more than seve

发表于:2019-02-05 / 阅读(238) / 评论(0)

英语杂谈

听播客学英语 139 多丽丝·莱辛

Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

发表于:2019-02-19 / 阅读(182) / 评论(0)

听播客学英语

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air route surveillance radar (arsr)

air-motor operated valve

alternative calculation