单词：steamboat coal
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9.Mark Twain ---Mirror of America Noel Grove Most Americans remember Mark Twain as the father of Huck Finn's idyllic cruise through eternal boyhood and Tom Sawyer's endless summer of freedom and adventure. In-deed, this nation's best-loved author was
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According to the latest data from the General Administration of Customs (GAC), China's net import(净出口) of coal hit 103.43 million tons in 2009. Last year, China exported 22.40 million tons of coal, down 50.7 percent year on year, while its coal
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According the government estimates,Americans produced about 250 million tons of garbage in 2010.Now of course,recycling can help cut down on the amount of treasury produced.But that's not enough for one Colorado city,officials there don't want to dec
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230. Traveling in 1800. 230．旅行条件（1800年） The traveler in those days had a very hard time. 这一时期的旅行者备受磨难， On the best roads of the north, in the best coach, and with the best weather one might cover as many as f
美国学生历史
AS IT IS 2015-04-26 40th Anniversary for Mississippi River Steamboat 密西西比河上的轮船 During the 1800s, the Mississippi River was crowded with steamboats. The river divided the United States in half, separating the older, more populated ea
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中国富煤缺油少气的能源资源特点，造成能源消费主要依赖于煤炭，石油则主要依靠进口，而且带来一系列环境问题。煤清洁转化技术则可以帮助缓解这一难题。近日专家表示，我国将在2020年
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