阅读理解。阅读下列短文, 从给的四个选项 (A、B、C 和 D) 中, 选出最佳选项。Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few apparent benefits? Why should resources be spent on space rather than on conditions and people on Earth? These are questions that, understandably, are very often asked. Perhaps the best answer lies in our genetic makeup(基因构成) as human beings. What drove our ancestors to move from the trees into the plains, and on into all possible areas and environments? The wider the spread of a species, the better its chance of survival. Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.Nearly every successful civilization has explored, because by doing so, any dangers in surrounding areas can be identified and prepared for. Without knowledge, we may be completely destroyed by the danger. With knowledge, we can lessen its effects. Exploration also allows minerals and other potential(潜在的) resources to be found.Even if we have no immediate need of them, they will perhaps be useful later. Resources may be more than physical possessions. Knowledge or techniques have been acquired through exploration. The techniques may have medical applications which can improve the length or quality of our lives. We have already benefited from other spinoffs including improvements in earthquake prediction, in satellites for weather forecasting and in communications systems. Even nonstick pans and mirrored sunglasses are byproducts(副产品) of technological developments in the space industry!While many resources are spent on what seems a small return, the exploration of space allows creative, brave and intelligent members of our species to focus on what may serve to save us. While space may hold many wonders and explanations of how the universe was formed or how it works, it also holds dangers. The danger exists, but knowledge can help human beings to survive. Without the ability to reach out across space, the chance to save ourselves might not exist.While Earth is the only planet known to support life, surely the adaptive ability of humans would allow us to live on other planets. It is true that the lifestyle would be different, but human life and cultures have adapted in the past and surely could in the future. 1Why does the author mention the questions in Paragraph 1? ATo express his doubts.BTo compare different ideas.CTo introduce points for discussion.DTo describe the conditions on Earth.2What is the reason for exploring space based on Paragraph 2?AHumans are natureborn to do so.BHumans have the tendency to fight.CHumans may find new sources of food.DHumans dont like to stay in the same place.3The underlined word “spinoffs” in Paragraph 4 probably refers to _.Asurvival chances Bpotential resourcesCunexpected benefits Dphysical possessions4What makes it possible for humans to live on other planets? AOur genetic makeup. BResources on the earth.CThe adaptive ability of humans.DByproducts in space exploration.解题导语 本文是一篇议论文，向我们阐述了人类进行太空探索的原因。人类的基因构成决定了人类探索其他领域包括太空的能力。人类探索太空可能暂时没有多大用处，但是在将来这可能会帮助人类生存下去。 1解析：选 C。推理判断题。作者在第一段提出问题目的是引出下面要讨论的话题。2解析：选 A。细节理解题。根据第二段的第一句可知人类探索太空的原因是其基因的构成。3解析：选 C。词义猜测题。后面所说的“improvements in earthquake prediction，in satellites for weather forecasting and in communications systems”可知此处的划线短语意为“益处，好处” 。4解析：选 C。细节理解题。根据最后一段的第一句话可知，人类的适应能力会让人类在其他星球生存下去。阅读下列短文，从每题所给的四个选项（A、B、C 和 D）中，选出最佳选项。It is pretty much a one-way street. While it may be common for university researchers to try their luck in the commercial world, there is very little traffic in the opposite direction. Pay has always been the biggest deterrent, as people with families often feel they cannot afford the drop in salary when moving to a university job. For some industrial scientists, however, the attractions of academia (学术界) outweigh any financial considerations.Helen Lee took a 70% cut in salary when she moved from a senior post in Abbott Laboratories to a medical department at the University of Cambridge. Her main reason for returning to academia mid-career was to take advantage of the greater freedom to choose research questions. Some areas of inquiry have few prospects of a commercial return, and Lees is one of them.The impact of a salary cut is probably less severe for a scientist in the early stages of a career. Guy Grant, now a research associate at the Unilever Centre for Molecular Informatics at the University of Cambridge, spent two years working for a pharmaceutical (制药的) company before returning to university as a post-doctoral researcher. He took a 30% salary cut but felt it worthwhile for the greater intellectual opportunities.Higher up the ladder, where a pay cut is usually more significant, the demand for scientists with a wealth of experience in industry is forcing universities to make the transition (转换) to academia more attractive, according to Lee. Industrial scientists tend to receive tr