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    阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的词数要求）。
    【1】Sometime early in the next century, human beings will move into habitats on Mars. They will live there for about a year, and then will be replaced with another set of pioneers. The establishment of this base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth.
    【2】We already know that Mars is like the earth in many ways: general size; presence of water; length of day; range of temperatures. These similarities have caused many people to consider a century-long project: to terraform Mars. Terraforming means changing a planet’s surface so that Earth’s life forms can survive there. This concept, previously found only in science fiction is now being seriously considered by scientists.
    【3】Terraforming Mars is theoretically simple: add nitrogen and oxygen to the atmosphere; pump water to the surface; and add the earth’s plants and animals in the order in which they developed on Earth. But it will take at least 300 years.
    【4】Some people think that such a project is too huge for humans to accomplish, but there are very good reasons to make the attempt. The earth now contains some 7 billion people, and no one knows how many humans the earth can support. Our very existence and numbers are threatening many other species with extinction. We also have had some experience with terraforming our own planet: changing the landscape, the atmosphere and the climate. At present, we are aware of the importance of terraforming the earth as we try to control global warming, air and water pollution, and protect some natural habitats.
    【5】While the future of such a project is daunting(令人生畏的), it is not impossible. Even if earth-bound societies come and go in the next 300 years, the project can continue through the work of the Mars settlers without the need for constant backing from earth.
    【6】The future existence of humanity may very well depend on our ability to terraform Mars.
    小题1:What’s the purpose of establishing a base on Mars in the 1st paragraph? ( not more than 12 words)
                                                                                
    小题2:List three ways Mars is like the earth. ( not more than 9 words)
                                                                               
    小题3:What’s the author’s attitude towards the project? (1 word)
                                                                                
    小题4:What does the future existence of humanity most probably rely on? ( not more than 6 words)
                                                                               
    小题5:What’s the main idea of this passage? (not more than 8 words)
                                                                               

    小题1: ( To) help us better understand the solar system and the earth.
    小题2:general size; presence of water; length of day; range of temperatures. (任选三项)
    小题3:Optimistic / Positive / Active
    小题4:Human’s/Our ability to terraform Mars.
    小题5:Terraform Mars. / Can human beings live on Mars? / Mars---Our future home./Find habitats on Mars.

    试题分析：本文围绕着人类移民火星而展开论述。首先从火星与地球的相似之处讲到移民火星在理论上的 可行性以及搬迁过程，继而又谈论了人类因人口的急剧增加而向外空发展的必要性。最后分析了人类科技的发展和成就大大增加了使火星适合人类居住和人类移民火星的可能性。
    小题1:细节题：从第一段的句子：The establishment of this base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth.可知建立火星基地是为了帮助我们更好的理解太阳系和地球。( To) help us better understand the solar system and the earth.
    小题2:细节题：从第二段的句子：We already know that Mars is like the earth in many ways: general size; presence of water; length of day; range of temperatures. 可知火星和地球相似的地方有：general size; presence of water; length of day; range of temperatures. (任选三项)
    小题3:推理判断题。从文章倒数第二段While the possibility of such a project is small, it is not impossible可知作者对此事持乐观态度。Optimistic / Positive / Active
    小题4:细节题：从最后一段的句子：The future existence of humanity may very well depend on our ability to terraform Mars.可知人类外来的存在主要在于对火星的地球化的能力： Human’s/Our ability to terraform Mars.
    小题5:主旨大意题。文章首段提出human beings will move to Mars，然后围绕此话题展开论述，所以文章中心应该是将火星地球化问题。 Terraform Mars. / Can human beings live on Mars? / Mars---Our future home./Find habitats on Mars.
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