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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit44:Obtaining Fresh
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit43:Statistics
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit41:American Black&
新东方优美背诵短文50篇 Unit41:American Black Bears41.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 brow2007-07-20 编辑:admin
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit42:Coal-fired powe
新东方优美背诵短文50篇 Unit42:Coal-fired power plants42.Coal-fired power plants The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily availabl2007-07-20 编辑:admin
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit37:Icebergs
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit38:Topaz
新东方优美背诵短文50篇 Unit38:Topaz38 TopazTopaz 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 “p2007-07-19 编辑:admin
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit39:The Salinity of Ocean Wat
新东方优美背诵短文50篇 Unit39:The Salinity of Ocean Waters39 The Salinity of Ocean WatersIf the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Neverthele2007-07-19 编辑:admin
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit40:Cohesion-tension&nbs
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit36:Plate Tectonics and Sea-f
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[新东方优美短文背诵] 新东方优美背诵短文50篇 Unit35:Oil Refining
新东方优美背诵短文50篇 Unit35:Oil Refining35.Oil RefiningAn important new industry, oil refining, grew after the Civil war. Crude oil, or petroleum – a dark, thick ooze from the earth – had been kn2007-07-18 编辑:admin