Obama appeals to public about 'fiscal cliff'

Mobile phones could help efforts to end malaria

Scientists can learn about man by studying animals, 阅读理解答案

The Enigma (谜）of Beauty完形填空答案

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More women starting businesses in US

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World AIDS Day 2012 more hopeful than in past

Maryland shop cooks up chocolate vote

Serving farm-fresh meals at the farm

Grandpa's hobby was making birdhouses.阅读理解答案

Jimmy Doolittle: a pilot and leader

NYC schools expand birth control availability

Slow progress on curbing deforestation expected at climate conference

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The risks of language for health translators

New report outlines strategy for HIV/AIDS

Seeking HIV tests for all in US age 15-65

Before going outside in the morning, many of us check 阅读理解答案

For a person, belief always plays an important role in his life

Are you a team player?阅读理解答案

Pirate attacks are down in 2012

Wastewater plants extract nutrients from sewage

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French experts question GMO cancer study

Palestinians cheer UN General Assembly vote

Falconer uses birds to give young people hope

Scientists search for new ways to treat infection

When you eat out in a restaurant, it is not unusual阅读理解答案

Irrigation pioneer wins world food prize