B．more studies would be needed for their research

　　C．cooling down people's brain might be harmful

　　D．the results of their study would be made use of soon

　　答案：B　推理判断题。根据最后一段的表述可知，这两位科学家认为该研究刚开始，今后还需要更多的研究。

　　Ⅲ.七选五

　　(2017·贵州省六校联盟第二次联考)

　　Doctors Say Most Heart Disease Preventable

　　Heart disease is the number one killer, worldwide, of men and women over the age of 60. But people of all ages die of heart attacks each year. And while death rates have declined in the U．S. and many western European countries, they are on the rise in the developing world. __1__.

　　No one would have guessed that Barbara Teng would have a heart attack. She was not overweight. She did not smoke or exercise. “In 2004, the week after I turned 49, when I was on a business trip in Chicago, I had a major heart attack，” she said. __2__. She now exercises daily, and monitors her heart health.

　　Dr. Patrice Nickens, who is with the National Heart, Lung and Blood Institute, thinks that heart disease is 82 percent preventable. “__3__，” she said.“Men are also facing the same problem, and the key to staying healthy is knowing your numbers.”

　　“Your weight, your blood cholesterol, blood sugar and your blood pressure are important numbers that can help you take action and reduce your risk，” she said.

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