氣象專家欲援助非洲腦脊膜炎多發(fā)帶 (2)
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"價格"的定義
價格決定資源的使用方式。 價格也是有限的產品與服務在買方中的配給 手段。Prices determine how resources are to be used. They are also the means by which products and services that are in limite...
捕鼠夾在印度 (2)
老鼠可以破壞25%的收成。改良捕鼠器挽回了數噸糧食。 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...
昂貴的MBA(2)
學費仍然在增長,現在一個典型的2年MBA學位需要花費10萬美元...Danos says an MBA from elite schools like Harvard, Stanford or Dartmouth still enable graduates to get the highest paying jobs after sch...
異形蚊子(2)
科學家正在進行異形蚊子在抵御瘧疾病流行的研究Marcelo Jacobs-Lorena is with the Malaria Research Institute at Johns Hopkins University in Baltimore, Maryland. Jacobs-Lorena says investigators creat...