养殖场外多种树 (2)
提示:George Malone
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谨防假药的危害(2)
假药的危害 Hints: W.H.O. The Center for Medicine in the Public Interest Counterfeit medications are also a problem in the Middle East and in many countries of the former Soviet Union. The probl...
捕鼠夹在印度 (2)
老鼠可以破坏25%的收成。改良捕鼠器挽回了数吨粮食。 提示:Irulas;Tamil Nadu;Siri Terjesen;Texas Christian University The Irulas asked for and received almost $100,000 from the World Bank. They u...
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...
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华盛顿市中心举行了一场大型的演唱会悼念逝者"And I was speaking the words of these four men talking about what it was like to look for the bodies of their sons in the rubble. Behind me, the Washing...