英语歌曲:Ring,Ring,Ring The Bells

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Why refrigerators hum? Why refrigerators hum，on toay's moment of science.On the recent program we have discussed how fluorocarboncoolant cools your food by coming to a boil in coils hidden in your fridge. How is this possible? When you boil water o

英语听力文摘 English Digest 532、有一种沸腾能冷却你的食物！

The Rolling Boil That Cools Your Food When you think of something boiling, you probably picture a pot on the stove, but theres another kitchen appliance that brings liquid to a boil, not to heat food, but cool it. It sounds crazy, but household refri

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Ring A Ring Of Roses a ring of roses a pocket full of posies (hot-sha hat-sha all fall down)* ring a ring of roses a pocket full of posies (hot-sha hat-sha all fall down)* the king has sent his daughter to fetch a pail of water (hot-sha hat-sha all f

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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Solar cells convert sunlight to electricity. But they don't take advantage of all that solar heat, thereby missing out on the majority of the solar ene

英语歌曲:Where Is The Ring?

英语歌曲:It Is OK

It Is OK and one and two ah ah it's ok why don't you leave me when I really need me myself and I baby I don't want to change my mind ah ah I forget this forget about a night so wonderful so mense stiring ur finger in my pie ah but heat it up don't he

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This is the VOA Special English Development Report. Dye can bring a little color to life. Most clothing is colored with dyes. Modern, manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. So

VOA慢速英语 2007 0521a

This is the VOA Special English Development Report. Dye can bring a little color to life. Most clothing is colored with dyes. Modern, manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. So

VOA慢速英语2010年-Development Report - Bringing Color to

This is the VOA Special English Development Report. Dye can bring a little color to life. Most clothing is colored with dyes. Modern, manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. So

英语儿歌274首 第176期:Ring,Ring,Ring the Bells

歌词如下： Ring,ring,ring the bells, Ring them loud and clear. To tell the children everywhere, That Christmastime is here. Ring,ring,ring the bells, Ring them loud and clear. To tell the children everywhere, That Christmastime is here.

英国学生科学读本 第35期:蒸汽往上冒(1)

Lesson 35 Getting up Steam 第35课 蒸汽往上冒！ Do you want to know what steam is? Let us get a lump of ice, or a snow-ball, and place it in a saucer in a warm room. It soon melts, and then the saucer is half full of water. If we leave the sau

英语听力精选进阶版 6379

We might not be alone in the universe. Actually, it may be confirmed as a very crowded place by new computer models developed to help identify habitable planets. Estimates of places that can sustain life have been based on the likelihood of them havi

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Next time you spill a little, let the coffee dry before wiping it up. Youll notice that after it dries there is a darkish ring around the very edge of the spill, whereas the middle disappears almost entirely. Whats going on here? Robert Deegan and Sy

【英语时差8,16】热到底是什么？-上

At one time it was believed that heat was a liquid. Sure, that sounds kind of crazy, but if you think for a second, you might see why. Suppose you have an object thats very hot say a metal spoon thats been sitting in hot coffee. Pick it up and you ca

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Why does blowing on hot soup help to cool it off? Its because of evaporation. Evaporation cools down a liquid because the most energetic molecules leap off the surface and leave the slower-moving molecules behind. Slower-moving means lower temperatur

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Instead of burning coal, oil, or biomass to heat things up, scientists have found that its possible to use solar energy. For example, some experimental facilities use thousands of mirrors to reflect sunlight onto a large plate on a tower, heating it

【英语时差8,16】太阳能也能用于制造液体燃料？ -上

I know that solar energy can be used to make electricity and to heat water and air. But can solar power also be used to make liquid fuels? Until recently, the practical answer was no. Photovoltaic panels absorb sunlight and use it to create an electr

英语听力文摘 English Digest 261、热是一种运动？

The Heat Is On 热传递，是热从温度高的物体传到温度低的物体，或者从物体的高温部分传到低温部分的过程。热传递是自然界普遍存在的一种自然现象。只要物体之间或同一物体的不同部分之间