2020年高考英语阅读理解冲刺训练3篇.pdfVIP

2020 年高考英语阅读理解冲刺训练 3 篇 【名师精选试题，值得下载练习】 限时： 60 分钟完成 A As e-cigarettes become more popular, fewer people are taking up smoking traditional cigarettes. But can e-cigarettes, an electronic nicotine delivery system, help people quit smoking altogether? The answer is probably yes. A study led by Matthew Carpenter, a professor at the Medical University of South Carolina found that e-smokers tend to smoke less and have increased quit attempts. In the pilot study, Carpenter evaluated e-cigarettes in terms of usage, product preference, changes in smoking behaviors and nicotine exposure. Ninety subjects were evaluated: 45 were randomized to use e-cigarettes, and 45 were randomized to a control group. Everyone was followed over a period of four months. The study was published in Cancer Epidemiology in November and is one of the few randomized studies in the U.S. to examine the effects of e-cigarettes. Results showed that when smokers were given e-cigarettes, uptake was strong. Many participants rated the e -cigarettes similar to their usual product, suggesting that e -cigarettes might give smokers a suitable alternative to combustible( 燃 烧 的 ) cigarettes. E-cigarettes offer significantly less exposure to harmful toxicants and therefore are safer. People using e -cigar ettes throughout the study smoked an average of 37 percent fewer cigarettes, as compared to those in the control group, showing a positive effect when making the switch and potentially serving as a tool to help smokers quit. That ’s good news for Carpenter and his colleagues. Smoking is the leading cause of cancer and