（整理版高中英语）北师大典题精讲（Unit20　NEWFRONTIERS）典题精讲.doc

【英语】北师大版 典题精讲Unit 20NEW FRONTIERS典题精讲What will people die of 100 years from now? If you think that is a simple question, you have not been paying attention to the revolution that is taking place in bio-technology(生物技术). With the help of new medicine, the human body will last a very long time. Death will come mainly from accidents, murder and war. Todays leading killers, such as heart disease, cancer, and aging itself, will become distant memories.In discussion of technological changes, the Internet gets most of the attention these days. But the change in medicine can be the real technological event of our times. How long can humans live? Human brains were known to decide the final death. Cells(细胞) are the basic units of all living things, and until recently, scientists were sure that the life of cells could not go much beyond 120 years because the basic materials of cells, such as those of brain cells, would not last forever. But the upper limits will be broken by new medicine. Sometime between 2050 and 2100, medicine will have advanced to the point at which every 10 years or so, people will be able to take medicine to repair their organs(器官). The medicine, made up of the basic building materials of life, will build new brain cells, heart cells, and so onin much the same way our bodies make new skin cells to take the place of old ones.It is exciting to imagine that the advance in technology may be changing the most basic condition of human existence, but many technical problems still must be cleared up on the way to this wonderful future.1. According to the passage, human death is now mainly caused by _.A. diseases and agingB. accidents and warC. accidents and agingD. heart disease and war2. In the authors opinion, todays most important advance in technology lies in _.A. medicineB. the InternetC. brain cellsD. human organs3. Humans may live longer in the future because _.A. heart disease will be far away from usB. human brains can decide the final deathC. the basic materials of cells will last foreverD. human organs can be repaired by new medicine4. We can learn from the passage that _.A. human life will not last more than 120 years in the futureB. humans have to take medicine to build new skin cells nowC. much needs to be done before humans can have a longer lifeD. we have already solved the technical problems in building new cells1. 答案:A解析:这是一道细节题。根据第1段“Todays leading killers, such as heart disease, cancer, and aging itself, will become distant memories. 可知, 导致人类死亡的主要原因是疾病和衰老。2. 答案:A解析:这是一道推断题。根据第2段“But the change in medicine can be the real technological event of our times. 可以推断出, 医药的改变是我们这个时代开展最大的技术。3. 答案:D解析:这是一道推断题。根据第2段“But the upper limits will be broken by new medicine. . . medicine will have advanced to the point at which every 10 years or so, people will be able to take medicine to repair their organs. 可知, 医药将能够修复人的器官使人活得更长。4. 答案:C解析:这是一道推断题。根据最后一段“but many technical problems still must be cleared up on the way to this wonderful future. 可知, 还有很多技术问题需要解决, 才能实现延长人类生命的目的。巧学园地将来进行时将来某时刻，事情正发生，时间莫无视，决定或安排，预测或希望，询问别人时，亲切和客气，将来进行时，形式很重要，will不可缺，后面紧跟be,加现在分词。