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美国国家公共电台 NPR 'Uber For Poop' Aims To Break Up Senegal's Toilet Cartel

AILSA CHANG, HOST: The laws of economics works smoothly except when it comes to cartels. Cartels happen when businesses get together and fix prices. Think OPEC for oil or De Beers for diamonds. Cartels hurt competition, drive up prices. And that's ge

发表于:2018-12-18 / 阅读(73) / 评论(0) 分类 2018年NPR美国国家公共电台8月

2007年VOA标准英语-Tuberculosis Remains a Global Threat

By David McAlary Washington 30 May 2007 U.S. health officials have quarantined an airline passenger who may have exposed others to a potentially dangerous form of tuberculosis. The unusual decision was made after the passenger took flights from the U

发表于:2019-01-13 / 阅读(160) / 评论(0) 分类 2007年VOA标准英语（五月）

2007年VOA标准英语-Global Tuberculosis Rate Holding Steady

By Lisa Schlein Geneva 22 March 2007 A new report says the global tuberculosis epidemic has leveled off for the first time since the World Health Organization declared TB a public health emergency in 1993. WHO's Global Tuberculosis Control report fi

发表于:2019-01-13 / 阅读(150) / 评论(0) 分类 2007年VOA标准英语（三月）

2007年VOA标准英语-Drug-Resistent Tuberculosis Gains Strength in R

By Anya Ardayeva Moscow 21 March 2007 watch Tuberculosis Russia report Russia is among the 22 countries in the world with the highest rate of tuberculosis. The U.S. Agency for International Development (USAID) says that after years of decline during

发表于:2019-01-13 / 阅读(137) / 评论(0) 分类 2007年VOA标准英语（三月）
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