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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(338) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

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(338) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

[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(185) / 评论(0) 分类 英语对接游戏

By Robert Berger Jerusalem 21 May 2007 Israel confirms that it is targeting the leaders of the Islamic militant group Hamas, hours after a deadly attack on the home of one of its lawmakers in the Gaza Strip. At least 12 Palestinians have been killed

发表于:2019-01-08 / 阅读(118) / 评论(0) 分类 2007年VOA标准英语(五月)

By Kari Barber Dakar 29 June 2007 An airplane carrying the Ivory Coast's prime minister, Guillaume Soro, came under fire by unknown assailants Friday, leaving several dead according to early reports. Sources close to the prime minister, say Mr. Soro,

发表于:2019-01-11 / 阅读(130) / 评论(0) 分类 2007年VOA标准英语(六月)

A Thai government policy review of the largely Muslim southern provinces is considering granting greater local autonomy with reforms including introduction of Sharia Law through Islamic courts. The strategy is part of efforts to bring to an end a fi

发表于:2019-01-13 / 阅读(138) / 评论(0) 分类 VOA标准英语2009年(三月)

Promising Target For Malaria Vaccine Identified British researchers have discovered a biochemical key used by the malaria parasite to invade human blood cells. The discovery could pave the way for an effective malaria vaccine. The Plasmodium malaria

发表于:2019-01-13 / 阅读(113) / 评论(0) 分类 VOA标准英语2011年(十一月)

Online Video Service Targets Infants These days it seems like American television and videos have us in their clutches from cradle to grave. On the grave side, the Home Box Office cable-TV show Six Feet Under, about a family-owned funeral home, ran f

发表于:2019-01-13 / 阅读(59) / 评论(0) 分类 VOA标准英语2011年(七月)

California Winemakers Target China Producing Napa Valley wine is a highly skilled craft, and Chinese consumers are developing a taste for it, says Tom Hinde of Yao Family Wines, started by former Chinese basketball star Yao Ming. We've made five vint

发表于:2019-01-14 / 阅读(109) / 评论(0) 分类 VOA标准英语2013年(七月)

World Markets on Edge as Greece Misses Deficit Reduction Target U.S. stocks followed European and Asian markets into the red on Monday after Greece announced it will miss deficit reduction targets worked out in a bailout deal with lenders. Despite a

发表于:2019-01-19 / 阅读(104) / 评论(0) 分类 VOA标准英语2011年(十月)

The Weekend - What a Bargain! (C0051) A: Hello. May I help you? B: Yeah, this dress is really nice! How much is it? A: That one is one hundred and fifty dollars. B: One hundred and fifty dollars? What about this other one over here? A: Thats one hund

发表于:2019-01-20 / 阅读(110) / 评论(0) 分类 纯正地道美语

Sidney reread the song list and artists. He noticed that the classic song Moon River was sung by Danny Williams; Sidney thought that the original artist was actually Andy Williams. He told Gita that he had his doubts. She told him not to buy it, but

发表于:2019-01-27 / 阅读(83) / 评论(0) 分类 365个英语简短小故事

I want some new love songs, Gita complained to Sidney. Im tired of listening to the same old ones. Sidney suggested that they go to WhereHouse, a popular music store that sold new and used CDs at great prices. So they drove to the one on Huntington A

发表于:2019-01-27 / 阅读(91) / 评论(0) 分类 365个英语简短小故事

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(121) / 评论(0) 分类 健康与经济

By Raymond Thibodeaux Gulu, Uganda 02 March 2006 Opposition supporters scream at Ugandan riot police as police and opposition supporters clashed in Kampala, February 25, 2006 Many of the nearly two mi

发表于:2019-01-31 / 阅读(179) / 评论(0) 分类 2006年VOA标准英语(三月)

Earlier this year, President Bush said the United States would spend $350 million over five years to fight seven of the world's most common parasitic and bacterial diseases affecting hundreds of millions of people in tropical regions of the world. A

发表于:2019-02-02 / 阅读(103) / 评论(0) 分类 VOA标准英语2008年(七月)

By Benjamin Sand Islamabad 11 March 2006 Pakistani troops have killed at least 25 suspected militants, some of them thought to be foreigners, in an attack near the Afghan border. The so-called tribal

发表于:2019-02-05 / 阅读(162) / 评论(0) 分类 2006年VOA标准英语(三月)

今天我们要学的词是bargain。 Bargain, 是谈判,讨价还价的意思。OK, It's a bargain, 意思是好,就这么说定了。 Union representatives bargain with employers for better rates of pay every year, 工会代表每年都要就涨工

发表于:2019-02-06 / 阅读(87) / 评论(0) 分类 英语单词荟萃

Manuel: Wow, Ive never seen so many shopping bags in my life. I can guess where youve been. Georgia: I did go overboard a bit today. I went to the outlet mall and I found some real bargains. Nearly everything was discounted. I was in shopping heaven!

发表于:2019-02-06 / 阅读(102) / 评论(0) 分类 地道美语播客

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(101) / 评论(0) 分类 听播客学英语