答案第1页,共11页 专题16 时文阅读七选五(1)-航空航天 1.【导语】这是一篇说明文。文章主要讲述太空垃圾现状以及呼吁全球一致共同清除。 重点词汇: Launch发射; orbit轨道; functioning运作,起作用; sustainability可持续性; concept概念,理念; financial金融的; related to与…有关; strategies策略; tackle解决; integrated结合,合并; 75 years after humans successfully put their first object into space, it’s much easier to launch a satellite, but a lot messier once we’re up there.”____1____There are around 5000 satellites in orbit with fewer than half actually working. When a satellite stops functioning, it keeps orbiting at very high speeds, making a great threat for the useful ones. So space sustainability has become a big concern.____2____One suggested solution is to refuel the dead satellites and bring them back to life. Another concept is to use a robot with four arms to catch a dead satellite before pulling it into the atmosphere to burn it up. ____3____Operating a robot from hundreds of miles away is tough. And the world hasn’t yet reached a consensus (共识) on why we should clear the space junk and there are no real rules that govern how we work out there. First why should we keep things clean in orbit? We use satellites to check the weather, find our way around, and for financial purposes. Space data gives us not just beautiful pictures of the earth, but also information about climate change, natural disasters and other things that can help humans with earthbound challenges.____4____ Then how can we humans think as one big community? Governments should make powerful regulations. Companies ought to engage in shared practices and scientists are expected to think up practical methods.____5____Only in this way can we keep those orbital highways open for the next generation and beyond before they are deadly blocked by space junk. A.They provide services closely related to our life. B.This is hard both technically and politically, though. C.Anyway, we should quicken the pace of clearing up. D.Space is getting increasingly crowded and dangerous. E.So we dep