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2007年VOA标准英语-Antibiotic Resistance Fast-Growing Problem Worl

By Carol Pearson Washington 28 February 2007 watch Antibiotic Resistance report Penicillin and Erythromycin are examples of antibiotics that used to be one-time miracle cures. These drugs and other antibiotics are now less effective because bacteria

发表于:2018-12-16 / 阅读(90) / 评论(0) 分类 2007年VOA标准英语（二月）

美国有线新闻 CNN 美国爆发大肠杆菌疫情 CDC呼吁民众停止食用长叶生菜

AZUZ: Romaine is another type that's getting attention for the wrong reason. The U.S. Centers for Disease Control is warning that a recent E. coli outbreak is connected to romaine lettuce. And this outbreak looks to be pretty widespread. It's affecte

发表于:2019-01-19 / 阅读(61) / 评论(0) 分类 CNN美国有线新闻2018年6月

2006年VOA标准英语-Cardiologists Debate Safety of Heart Stents

By Carol Pearson Washington, DC 08 November 2006 watch Heart Stent report Heart stents are lifesaving medical devices that help prevent heart attacks. Most of these stents are coated with various drugs, but mounting data suggest drug-coated stents c

发表于:2019-02-03 / 阅读(135) / 评论(0) 分类 2006年VOA标准英语（十一月)
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