45.The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Suns very center. It is here that is to be found the source of the energy that the Sun constantly pours out i

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新概念优美背诵短文50篇

新概念英语85年上外美音版第四册第55课

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新概念英语85年上外美音版

新概念英语85年上外美音版第四册第57课

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新概念英语85年上外美音版

新概念英语85年上外美音版第四册第58课

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新概念英语85年上外美音版

新概念英语85年上外美音版第四册第59课

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新概念英语85年上外美音版

新概念英语85年上外美音版第四册第60课

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新概念英语85年上外美音版

新东方优美背诵短文50篇 Unit39:The Salinity of Ocean Waters

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the

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新东方优美背诵短文50篇 Unit40:Cohesion-tension Theory

40 Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ni

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新概念优美背诵短文50篇

新东方优美背诵短文50篇 Unit41:American Black Bears

41.American black bears American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or even yellow coats. To the north, the black bear is actually gray or white in color. Even

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新概念优美背诵短文50篇

新东方优美背诵短文50篇 Unit42:Coal-fired power plants

42.Coal-fired power plants The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel with which to generate large amounts of electric power. Coal seemed to fit the bill, and it fuel

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新概念优美背诵短文50篇

新概念英语第二册Lesson 70 Red for danger

Lesson 70 Red for danger 危险的红色 First listen and then answer the question. 听录音，然后回答以下问题。 How was the drunk removed from the ring? During a bullfight, a drunk suddenl

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新概念英语第二册

新概念英语第二册Lesson 69 But not murder!

Lesson 69 But not murder!并非谋杀！ First listen and then answer the question. 听录音，然后回答以下问题。 Do you think that the writer passed his driving test? Why? I was being teste

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新概念英语第二册

新概念英语第二册Lesson 67 Volcanoes

Lesson 67 Volcanoes 火山 First listen and then answer the question. 听录音，然后回答以下问题。 Why does Tazieff risk his life like this? Haroun Tazieff, the Polish scientist, has spent

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新概念英语第二册

新概念英语第一册Lesson 25 Mrs. Smith’s kitchen

Mrs. Smith’s kitchen is small. There is a refrigerator in the kitchen. The refrigerator is white. It is on the right. There is an electric cooker in the kitchen. The cooker is blue. It is on the lef

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新概念英语第一册

新概念英语第一册Lesson 19 Tired and thirsty

Whats the matter, children? We are tired and thirsty, Mum. Sit down here. Are you all right now? No, we arent. Look! Theres an ice cream man. Two ice creams please. Here you are, children. Thanks, Mum. There ice creams are nice. Are you all right no

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新概念英语第一册

新概念英语第一册Lesson 31 Where’s Sally?

Wheres Sally, Jack? Shes in the garden, Jane. Whats she doing? Shes sitting under the tree. Is Tim in the garden, too? Yes, he is. Hes climbing the tree. I beg your pardon? Whos climbing the tree. Tim is. What about the dog? The dogs in the garden,

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新概念英语第二册Lesson 71 A famous clock

Lesson 71 A famous clock 一个著名的大钟 First listen and then answer the question. 听录音，然后回答以下问题。 Has Big Ben ever gone wrong? When you visit London, one of the first t

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新概念英语第二册

新概念英语第二册Lesson 66 Sweet as honey!

Lesson 66 Sweet as honey!像蜜一样甜！ First listen and then answer the question. 听录音，然后回答以下问题。 What was 'sweet as honey' and why? In 1963 a Lancaster bomber crashed on

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新概念英语第二册

新概念英语第二册Lesson 65 Jumbo versus the police

Lesson 65 Jumbo versus the police小象对警察 First listen and then answer the question. 听录音，然后回答以下问题。 Why did the police have to push Jumbo off the main street? Last Chri

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新概念英语第二册