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A single river can carry three times as much water as the entire Mississippi, they provide almost half the annual rain fall for parts of the American Pacific coast, but when they remain in one area for a day or more, they can produce violent flooding
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New Data Adds to Understanding of 'Black Holes' WASHINGTON Scientists continue to learn more about black holes in space, places where the pull of gravity is so strong that not even light can escape. Black holes occur after supergiant stars explode in
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play pause stop mute unmute max volume 00:0003:30repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin. AZUZ: The U.S. which has the planet's most extreme weath
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The People's Liberation Army has finished an exercise in waters in Southeast China. The drill was to test landing operations and an integration of combat capabilities. Soldiers were selected from around a dozen categories of troops. They were reshuff
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第二部分：Task1 写作常识 一、图形种类及概述法： 泛指一份数据图表：a data graph/chart/diagram/illustration/table 饼图：pie chart 直方图或柱形图：bar chart / histogram 趋势曲线图：line chart / curve diagram
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Almost all of us have wondered at one point or another about the taxes we pay: Where does the money go? Former Microsoft CEO Steve Ballmer not only wondered. He decided to make the information available in the form of a new public research tool. Last
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