Investment and ConsumptionInvestment in the public sector,such as electricity,irrigation,public services and transport (excluding vehicles,ships and p...2015-09-29
答案在下一頁One Good Reason to Let Smallpox LiveIt's now a fair bet that we will never see the total extinction of the smallpox virus.The idea was to cap t...2015-09-29
Physical FitnessPhysical fitness is today’s hot topic. And wherever you turn, you hear something new. But is it all true?The more you sweat, the more ...2015-09-29
The Effects of Global Warming on WeatherThere are hidden factors which scientists call "feedback mechanisms”。 No one knows quite how they will interac...2015-09-29
Studies Show US Spending Doesn’t Get Best HealthThe United States many spend twice as much on health care as other rich countries1, but it is not gett...2015-09-29
Most Adults in US Have Low Risk of Heart DiseaseMore than 80 percent of US adults have a less than 10–percent risk of developing heart disease in the ...2015-09-29
Benefits of Educating GirlThe benefits of educating girls are numerous — to individual girls both when they are young and when they become adult women...2015-09-29
Men Too May Suffer from Domestic ViolenceNearly three in 10 men have experienced violence at the hands of1 an intimate partner during their lifetimes,...2015-09-29
Lead PollutionLead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions ori...2015-09-29
Britain’s Solo SailorEllen MacArthur started sailing when she was eight,going out on sailing trips with her aunt.She loved it so much that she saved h...2015-09-29