单词：hydrazinoethanol
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KELLY MCEVERS, HOST: David Letterman hosted late night TV for more than three decades with his own brand of quirky funny, like stupid human tricks, throwing a watermelon off a roof and those daily top 10 lists, such as the top 10 things that sound co
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By Greg Flakus Houston 16 October 2007 In recent months food costs in the United States have gone up by well over six percent and some economists see government-mandated use of bio-fuels as a key reason. But, as VOA's Greg Flakus reports from Houston
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By Jeffrey Young Washington 16 October 2007 U.S. farmers have gone through many cycles of boom and bust. But as VOA's Jeffrey Young reports, prospects for American agriculture are looking up, thanks to rising crop prices and land values, especially i
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A fridge that talks to your washing machine and a television that instructs your dishwasher. It's all possible at CeBIT, the world's top high-tech fair。 But the question is: what's the point? Well, for example, you could be sitting on your sofa in
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A fridge that talks to your washing machine and a television that instructs your dishwasher. It's all possible at CeBIT, the world's top high-tech fair. 冰箱和洗衣机交谈、电视向洗碗机下令在世界顶级高科技展会德国汉诺威通
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阅读理解除了要求正确理解事实细节的能力外，还经常需要考生根据一定上下文对某些词汇的意义 所读材料理解文章隐含的意义和深层次的含义、归纳文章主题思想、通过概括得出结论、综合
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