According to the Journal of the American College
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According to the Journal of the American College of Cardiology,_______of the U.S. adults had a risk of developing heart disease above 20 percent in the next 10 years.
A. three percent
B. ten percent
C. twenty percent
D. eighty-two percent
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答案：A
由第四段“Overall , 82 percent of adults had a risk of less than 10 percent , 15 percent had a risk that fell between 10 to 20 percent and 3 percent had a risk above 20 percent.”可知，美国80％以上的成年人未来十年内患心脏病的风险低于10% ,15％的成年人未来患心脏病的风险介于10％～20% ,3％的成年人患心脏病的风险在20％以上。故选A。