单词：determination of cardiac ejection fraction
单词：determination of cardiac ejection fraction 相关文章
一场网球赛有几局？ How many games are there in the tennis set? 辛吉斯是个网球高手。 Hingis is a top-notch tennis player. 他很有体育道德。 He has good sportsmanship. 他的发球相当棒。 His serve is fantastic. 他在这场
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In 1883, a creative engineer named John Roebling was inspired to build a spectacular[壮观的] bridge connecting New York with Long Island. However bridge-building experts throughout the world thought that this was an impossible feat and told Roebling
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Little girls are made of sugar and spice and, according to a study published in the journal Cell, a fierce determination to maintain their girlishness. Because it seems that a single gene keeps their ovaries from turning into testes. Scientists have
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By Carol Pearson Washington 25 July 2007 You may have heard about young athletes, still teenagers, whose hearts stop beating, sometimes while playing sports. In many of these cases, their parents and doctors find out after the fact that these young a
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Scientists are reporting a new way to identify when a heart transplant recipient is starting to reject the new organ. The new technique could help doctors ensure the success of more transplants. The human immune system is programmed to reject foreign
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By VOA Sports Washington, DC 01 December 2007 American tennis player Andy Roddick has given the United States a 1-0 lead over Russia in the Davis Cup tennis finals by beating Dmitry Tursunov in Portland, Oregon. Roddick fired 25 aces and had only fou
VOA常速英语2007年（十二月）