2019-2020年高考英语一轮总复习第一部分教材知识梳理Unit3Traveljournal练习新人教版必修

2019-2020年高考英语一轮总复习第一部分教材知识梳理Unit3Traveljournal练习新人教版必修一、阅读理解(共8小题;每小题2分,满分16分)ADeath is natural,but

2019-2020年高考英语一轮总复习第一部分教材知识梳理 Unit3Traveljournal练习新人教版必修 8216 一、阅读理解(共小题;每小题分,满分分) A Death is natural,but do you have any idea of the process of dying?Modern scientists divide the process of dying into two stages—clinical or temporary death and biological death.Clinical death occurs when the vital organs,such as the heart or lungs,have ceased to function,but have not suffered permanent damage.The organism can still be revived(复活).Biological death occurs when changes in the organism lead to the “breaking up” of vital cells and tissues.Death is then unchangeable and final. Scientists have been seeking away to lengthen the period of clinical death so that the organism can remain alive before biological death occurs.The best method developed so far involves cooling of the organism,bined with narcotic(麻 醉的) sleep.By slowing down the body’s metabolism(新陈代谢),cooling delays the processes leading to biological death. To illustrate how this works,scientists performed an experiment on a six-year-old female monkey called Keta.The scientists put Keta to sleep with a narcotic.Then they surrounded her body with ice-bags and began checking her body temperature.When it had dropped to 28 degrees the scientists began draining(使流光) blood from an artery(动脉).The monkey’s blood pressure decreased and an hour later both the heart and breathing stopped:clinical death set in.For twenty minutes Keta remained in this state.Her temperature dropped to 22 degrees.At this point the scientists pumped blood into an artery in the direction of the heart and started artificial breathing.After two minutes Keta’s heart became active once more.After fifteen minutes,spontaneous(自发 的)breathing began,and after four hours Keta opened her eyes and lifted her head.After six hours,when the scientists tried to give her apenicillin injection,Keta seized the syringe(注射器)and ran with it around the room.Her