2019年高考英语阅读理解专项突破及答案.pdf

2019 年高考英语阅读理解专项突破 (名师精选全国真题 +详细解析答案，值得下载打印练习 ) 细节理解题 (A 卷 ) (加彩的题目为细节理解题，本卷限时 20 分钟 ) A Fitness bands like the Apple Watch and the Fitbit aim to track something like heart rate. But early models weren ’allt that accurate.We thought of them a little bit like random number generators (生成器 ) ．They really didn ’t seem to be providing anything that bore any relationship to heart rate. Euan Ashley, a cardiologist (心脏病专家 ), studies wearables at Stanford University.He and his colleagues have now tested seven newer fitness bands, from brands like Apple, Fitbit to others and he says those heart rate statistics have gotten much better. “ surprised actually by how good the accuracy of the heart rate monitoring was. ” For most of the devices, the error rate was less than 5%, which is good enough for your doctor.But where all the devices failed to measure up was estimating calories burned.Even the most accurate devices were off by 30%, compared to lab measurements of energy consumption.One device was off by more than 90%. If you think about going to the gym and working out for an hour and maybe that ’ 400 calories, then in reality that could be anything from 200 to 800.And that ’ if you ’ re thinking about somebody who ’s incorporating those estimates into their lifestyle and particular thinking about what to eat that evening based on the workout they did that afternoon. The results are in the Journal of Personalized Medicine.The reason for the discrepancy, Ashley says, coul