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[新東方背誦文選] 新東方背誦文選 Lesson 43:Statistics
Statistics There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 42:Coal-fired p
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 electr2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 41:American bla
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 black2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 40:Cohesion-tension&
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 m2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 39:The Salinity
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 th2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 38:Topaz
Topaz Topaz is a hard, transparent mineral. It is a compound of aluminum, silica, and fluorine. Gem topaz is valuable. Jewelers call this variety of the stone "precious topaz". The best-k..2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 37:Icebergs
Icebergs Icebergs are among nature's most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being ----- somewhere ------in far..2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 36:Plate Tecton
Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part o2006-05-12 編輯：admin
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[新東方背誦文選] 新東方背誦文選 Lesson 35:Oil Refining
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 years, but little use had2006-05-12 編輯：admin
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