题目内容
7.Life on Mars could become a reality and it could happen in your lifetime.A welcoming planet
Scientists say Earth's neighbor Mars,a bright red planet about half Earth's size,is the most likely to support human life.Mars even has frozen water on its surface.
Since the late 1990s,NASA has been exploring Mars using remote-controlled vehicles(装置).Most recently Curiosity,a car-size vehicle,traveled through space on an unpiloted spacecraft(航天器) and landed on Mars in August 2012.Directed by NASA scientists,the vehicles move on the surface,taking pictures,collecting and analyzing soil,and looking for signs of life.
But what about human explorers?Plans are already in the works to send astronauts to Mars as soon as the mid-2030s.
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But before you start packing your bags,let's consider the challenges.For starters,Mars is far away.Just getting there could take up to 10months.
Scientists already know that time away from Earth's gravity harms the human body.Bones and muscles get weaker.The body produces less blood.What damage would months and months of living in space do?
And then there is the matter of water,oxygen,food and fuel.Scientists will have to find solutions to these problems,or the first humans on Mars won't survive very long in their new home.
Tiny Dangers
There's another tinier risk.It's so tiny that you can't even see it:germs.
Some scientists believe that our germs could pollute the whole planet of Mars.Potentially killing Martian life before we have the chance to discover it.Worse,there is a small but terrifying chance that any microscopic life already there might be harmful to us.
Worse still,if any of those Martian germs(火星细菌) were brought back to Earth,the result could be disastrous.Animals,plants,and people could be wiped out.
Worth the?Amorepracticalconcernisthecost.Thepricecouldapproach 1trillion(万亿).How can we justify spending that much when so many problems-poverty,disease-could use the cash here on Earth?
41.Which of the following is TRUE according to the"A welcoming planet"part?C
A.Mars is a little bigger than Earth.
B.There are flowing rivers on Mars.
C.People haven't been to Mars so far.
D.Scientists have discovered signs of life on Mars.
42.Which of the following can best fill in the blank in the passage?C
A.Living in space. B.Limited resources.
C.Extreme conditions. D.Interesting challenges.
43.By"Tiny dangers"the author meansD.
A.there is no serious danger
B.people won't be in any danger
C.it's difficult for people to realize the danger
D.the danger may be caused by very small things
44.Which may cause the biggest danger?B
A.Martian germs may be different from those on Earth.
B.Martian germs may be brought back to Earth.
C.People may carry germs to Mars.
D.There may be germs on Mars.
45.Which section of a newspaper is the passage most probably taken from?C
A.People B.History C.Science D.Business.
分析 火星移民到底能不能实现?科学家目前对火星进行了许多研究,并认为目前移民是很困难、有风险的.火星的环境和地球差距很大,但是并不代表未来不可行.这吸引了人们的执着追寻.
解答 41.C.细节理解题.由"Plans arealreadyin the works to send astronauts to Mars as soon as the mid-2030s."可知让人们登上火星还要等到21世纪年30年代中期. 故选C.
42.C 推理判断题.这一部分主要讲了前往火星最主要的困难,因此是极端的条件.Livinginspace.生活在太空;Limitedresources.有限的资源;Extremeconditions.极端的条件;Interestingchallenges.有趣的条件.故选C.
43.D 推理判断题.由"There'sanothertinier risk.It's so tiny that you can't even see it:germs."可知,微生物对火星和地球都是潜在的威胁,但是它们太小以至于看不见.故选D.
44.B 细节理解题.根据"Worsestill,ifany of those Martian germs(火星细菌) were brought back toEarth,the result could be disastrous.Animals,plants,and people could bewiped out."可知,火星带回来的细菌很可能是致命的.故选B.
45.C 推理判断题.本文主要讲了火星移民的风险和困难,是一篇科普性质的文章,因此来源于"科学"报.故选C.
点评 本文是新闻报道类阅读,主要考查细节理解题和推理判断题.在做细节理解题时,首先根据题目要求迅速在文章里找出相应的段落、句子或短语.认真比较选项和文中细节的区别,在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
A. | wander | B. | wandered | C. | to wander | D. | wandering |
"How about a small dinner with(37)C?"I asked.
"No,"she said,"I hate being the center of(38)A."
Still,the milestone had to be marked.(39)D wasn't going to let her get away with a Stouffer's frozen dinner and a movie video,(40)C this was all she said she wanted.
I thought and thought,and(41)B making my decision,I sent a letter to her friends,asking them for photos,poems,and letters."Carol doesn't (42)A a party in person…but I'm hoping to(43)D her a party in a book."I bought a(n)(44)A with a friend's advice,and what I wanted(45)B.For a few minutes at the end of every workday,I(46)C pull out the marking pens and make up the(47)D,Carol's.
Photos of her in junior high,pictures of us (48)C the boys,original songs,notes,cards,and poems.It made me(49)A for all the years we had had together.The(50)B was more than the album.It was the friendship and love she had given to me and to our kids and to all her friends and family.You could (51)B it on every page.
I wrapped it up and(52)A it home."Happy birthday,sweetie,"I said."It's not a frozen dinner or a video,but it's (53)D you deserve."She cried.She doesn't(54)C like to cry,but I think she likes the book.She's said so many times.And every time I remind her(55)B putting it together was a gift to me.
36.A.amazing | B.clear | C.unusual | D.important |
37.A.neighbours | B.children | C.friends | D.classmates |
38.A.attention | B.comment | C.view | D.interest |
39.A.She | B.It | C.He | D.I |
40.A.for | B.or | C.and | D.when |
41.A.before | B.after | C.when | D.once |
42.A.want | B.have | C.hold | D.attend |
43.A.make | B.choose | C.find | D.give |
44.A.album | B.novel | C.mirror | D.overcoat |
45.A.went on | B.poured in | C.turned back | D.got away |
46.A.could | B.should | C.would | D.might |
47.A.decision | B.story | C.mind | D.book |
48.A.for | B.around | C.with | D.except |
49.A.grateful | B.worried | C.nervous | D.special |
50.A.meaning | B.gift | C.party | D.world |
51.A.count | B.read | C.express | D.improve |
52.A.took | B.sent | C.placed | D.packed |
53.A.how | B.why | C.which | D.what |
54.A.normally | B.merely | C.really | D.obviously |
55.A.whether | B.that | C.when | D.who |
A. | abandon | B. | accompany | C. | govern | D. | target |