绿卡申请新考题(2)
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控制霍乱新方法(2)
有一种低成本的口服疫苗可以有效保护人们免受霍乱的侵害...Ira Longini at the Fred Hutchinson Cancer Research Center in Seattle, Washington, led the new work. A team from the United States, South Kor...
艾滋病感染得到控制(2)
联合国官方称,现有感染艾滋病病毒的人比他们预期的要少...But U.N. officials say AIDS is still one of the leading causes of death worldwide and the major cause in Africa. African death rates remain ...
WTO的历史(2)
关于世界贸易组织WTO的一段历史The sixth round began in 1963. It was called the Kennedy Round after the murder of President John F. Kennedy. The results included an agreement against trade dumping....
安眠药的潜在危害(2)
科学家发现安眠药除了让人进入睡眠,还有一些潜在的危害The Food and Drug Administration did not say in its announcement how many cases of sleep-driving it has documented. However, the New York Times...