课时作业(九) 必修2 Unit4 Wildlife protection-2021高考英语【师说】高中全程复习构想人教版（新高考）

课时作业(九)　必修②　Unit 4　Wildlife protection 　　　　　　　　　　　　　　 Ⅰ.阅读理解 A [2020·山西六校第二次阶段性测试]Sleeping in a noisy room isn't only distracting(使人分心的), and it can also harm your health. Although researchers have known for decades that long­term loud noises can harm us, it's only recently become recognized as a widespread issue. In a new review of previously published studies, researchers from Germany and Denmark took a look at the ways in which noises, such as an airplane passing by or jackhammer digging in the ground, can affect our hearts. Perhaps the most obvious impact of a loud sound while you are sleeping is that it can wake you up. But, even if you don't remember hearing the noise or you don't physically get out of bed, it can disrupt you in ways you may not realize. “Noise is not just causing annoyance, but it actually makes us sick，” said Dr. Thomas Münzel, a professor at Johannes Gutenberg University Mainz. “Regardless of where the sound is coming from, if it gets louder than 60 decibels(分贝), it can increase the risk of heart disease.” When our body hears these noises, it reacts with a stress reaction. In this case, these sudden and unexpected noises cause hormones(荷尔蒙) to speed up and eventually damage the heart. Although the chance that a single noise will affect you is unlikely, it's the constant exposure to the sound that can eventually affect you. “But our heart health isn't the only cause for concern. Long－term noise may also raise the risk of type 2 diabetes, depression, and anxiety disorders，” he warns. In the future，Münzel plans to examine how noises from cars, planes, and other vehicles affect the brain. But despite the amount or the depth of research he conducts, it'll take the help of politicians to improve the impact of noise on our health. “Politicians have to take into account, in particular, the new findings，” Münzel said.“With respect to aircraft noise and airports, it is important to make new laws and set new lower noise limits that protect peopl