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[跟可可背精美短文] 跟可可背精美短文 第48篇:Raising Oysters饲养牡
在线试听和英语短文Raising Oysters In the past oysters were raised in much the same way as dirt farmers raised tomatoes - by transplanting them. First, farmers selected the oyster bed, cleared the bo2008-12-31 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第47篇:Pottery陶器
在线试听和英语短文Pottery Ancient people made clay pottery because they needed it for their survival. They used the pots they made for cooking, storing food, and carrying things from place to place.2008-12-30 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第46篇:Population Growth人
在线试听和英语短文Population Growth The growth ofpopulationduring thepastfewcenturiesisnoproofthat population will continue to grow straight upward toward infinity and doom. On the contrary, demogra2008-12-29 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第45篇:Police and Communi
在线试听和英语短文Police and Communities Few institutions are more important to an urban community than its police, yet there are few subjects historians know so little about. Most of the early acade2008-12-26 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第44篇:Plate Tectonics板块结
在线试听和英语短文PlateTectonicsandSea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outerlayerofthe Earththat includes all thecrust2008-12-25 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第43篇:Plants in the Dese
在线试听和英语短文Plants in the Deserts Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts. Cl2008-12-24 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第42篇:Plankton浮游生物
在线试听和英语短文Plankton Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human eye2008-12-23 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第41篇:Piano钢琴
在线试听和英语短文Piano The ancestry of the piano can be traced to the early keyboard instruments of the fifteenth and sixteenth centuries -- the spinet, the dulcimer, and the virginal. In the seven2008-12-21 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第40篇:Oil Refining炼油
在线试听和英语短文Oil Refining An important new industry, oil refining, grew after the Civil War. Crude oil, or petroleum -- a dark, thick ooze from the earth -- had been known for hundreds of years2008-12-19 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第39篇:Oil and Water油和水
在线试听和英语短文Oil and Water To understand the emulsifying process, we must first accept the scientific principle that oil and water do not naturally mix. Quite literally, they find each other's2008-12-18 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第38篇:Obtaining Fresh
在线试听和英语短文Obtaining Fresh Water from Icebergs The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke mo2008-12-17 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第37篇:Nitinol 镍钛合金
在线试听和英语短文Nitinol Nitinol is one of the most extraordinary metals to be discovered this century: A simple alloy of nickel and titanium, nitinol has some perplexing properties. A metal with a2008-12-16 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第36篇:Museums 博物馆
在线试听和英语短文Museums From Boston to Los Angeles, from New York City to Chicago to Dallas, museums are either planning, building, or wrapping up wholesale expansion programs. These programs alre2008-12-15 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第35篇:Muscles and Human肌
在线试听和英语短文Muscles and Human BodyItisinthejointsofthehumanbodythatmovementsofthe bones take place.The movementitself iscaused bythe pullofsheetsandcordsof very tough tissue calledmuscle. Musc2008-12-13 编辑:alex 标签:
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[跟可可背精美短文] 跟可可背精美短文 第34篇:Movie Music 电影插曲
在线试听和英语短文 Movie Music Accustomed though we are to speaking of the films made before 1927 as "silent", the film has never been, in the fullsenseofthe word,silent.From the very beginning,mu2008-12-12 编辑:alex 标签: