单词：air-wall cavity ionization chamber
单词：air-wall cavity ionization chamber 相关文章
Air pollution outside is easy to spot, hanging over the city, or sputtering from a tailpipe. But there's lot of indoor air pollution, too, even if it's not as obvious. It's caused by volatile organic compounds, or VOCs. They can come from building ma
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President Barack Obama speaks on Wall Street reform at the Oakley Lindsay Center in Quincy, Ill., Wednesday, April 28, 2010. (AP Photo/Seth Perlman) On the final stop of a trip to promote his initiatives to rural America, President Barack Obama stopp
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AUDIE CORNISH, HOST: Climb Every Mountain, Rocky Mountain High, Night On Bald Mountain - music and mountains have long been linked in the public imagination. Critic Bob Mondello says a documentary called Mountain finds a new sort of purity in the con
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And extremely cold, at 4 degrees, it's the same temperature as the sea in the Antarctic, the ROV reaches a depth of 800 meters, not quite at the bottom, but not far off, a pilot of coral sand at the base of the reef wall slopes gently into the abyss,
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Anti-Wall Street Protest Spreads To Washington The anti-capitalist protests that began near Wall Street in New York are spreading to other cities. Unlike the Tea Party movement, which blames big government for America's economic problems, the so-call
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Listen to the patients' questions to a doctor.Check the correct answers that the doctors may response. 1.What caused my stomachache? 2.Do I need to take medicine? 3.What is this d rill for? 4.Is the cavity serious? 5.Can you do something about the ca
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