1、第二单元测试卷Unit 2 Out of this world注意事项：1. 答卷前，考生务必将自己的姓名、考生号等填写在答题卡和试卷指定位置上。2. 回答选择题时，选出每小题答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上，写在本试卷上无效。3. 考试结束后，将本试卷和答题卡一并交回。第一部分 听力(共20小题；每小题1.5分，满分30分)做题时，先将答案标在试卷上。录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。第一节 (共5小题；每小题1.5分, 满分7.5分)听下面5段对话。 每段对话后
2、有一个小题，从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。例：How much is the shirt? A.19.15. B. 9.18. C. 9.15.答案是C。1. What has the man been doing? A. Writing something. B. Repairing his pen. C. Shopping. 2. What time is it now? A. 12:00. B. 10:00. C. 8:00.3. Where is the man probably now
3、?A. At home. B. In the office. C. In a restaurant. 4. What is the woman? A. A waitress. B. A typist. C. A taxi driver. 5. What can we learn from this conversation?A. Tom is surprised at the womans call.B. Tom complains about the womans call.C. Tom feels sorry that hes missed the womans party.第二节 （共1
4、5小题；每小题1.5分，满分22.5分）听下面5段对话或独白, 每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，听每段对话或独白前，你将有时间阅读各小题，每小题5秒钟，听完后，各小题将给出5秒钟作答时间，每段对话或独白读两遍。听第6段材料, 回答第6至7题。6. When did the man move to the U. S?A. Eight years ago.B. Three years ago.C. Half a year ago.7. Why does the man want to join the Peace Corps?A. To learn bus
5、iness better. B. To live in another country.C. To do some researches.听第7段材料, 回答第8至9题。8. When does the man plan to see the performance?A. Next Saturday.B. On October 21st. C. On October 25th.9. How much will the man pay for the tickets?A. $2.50.B. $3.75.C. $10.听第8段材料, 回答第10至12题。10. When did the man b
6、uy the Tshirt? A. Yesterday. B. A couple of days ago. C. A few weeks ago.11. Why does the man want to change the Tshirt?A. He wants a bigger size.B. He doesnt like the style.C. He prefers another color. 12. What will the woman do next?A. Change the Tshirt for the man. B. Talk with her manager about
7、the shirt. C. Give the mans money back. 听第9段材料, 回答第13至16题。13. Whats Harveys opinion about finding aliens (外星人)? A. We know nothing about them. B. We have communicated with them. C. Astronauts have the evidence of their existence. 14. Whats Jennas opinion of aliens? A. Theyre not as advanced as we ar
8、e. B. They may not think highly of us. C. They are trying to contact us.15. Why does Harvey think the government wouldnt admit aliens publicly? A. We are not ready for the information. B. Our earth may be attacked by aliens. C. No one cares about the aliens. 16. What does Jenna think of our earth? A
9、. Its beautiful. B. Its polluted. C. Its rich and reliable. 16. B听第10段材料，回答第17至20题。17. Why are humans interested in the heavens? A. They desire to know the unknown. B. They are driven by their fathers. C. They want to beat other countries.18. What drives humans to join NASA? A. Ignorance. B. Curiosi
10、ty. C. Fortunes.19. What does the International Space Station serve as? A. A broadcasting room. B. A battle field. C. A national lab. 20. What research will we do on the International Space Station? A. Spreading virus. B. Influence of gravity. C. Manufacturing new goods.第二部分 阅读理解（共两节，满分35分）第一节（共10小题
11、；每小题2.5分，满分25分） 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。A2021原创应用文主题语境：人与自然宇宙探索难度：Standard 339 words19版译林选必三Give me some Spaceby Philip BluntingUna dreams of a life in Space. Life on Earth is just so so-so. But how will she get there? And will she complete her mission to discover life in Space?On May 19
12、th 2021, Give Me Some Space! was read to over 1.98 million children across Australia and New Zealand by NASA astronaut Shannon Walker from the International Space Station (ISS)!Purchase This BookCuriosity: The Story of a Mars Roverby: Markus MotumOn August 6, 2012, the rover Curiosity touched down o
13、n the rocky surface of Mars and now shes ready to guide you through her journey firsthand. From idea to creation and beyond, this fact-filled, fashionable book introduces readers to Curiosity and her mission: to discover more about the red planet and search for evidence of life. How did Curiosity ge
14、t her name? What tools does she use to carry out her tasks? Purchase This BookMax Goes to Marsby Jeffrey BennettNow fully updated with results from the Curiosity rover and much more, the new second edition of Max Goes to Mars picks up where Max Goes to the Moon left off, taking Max and his friends o
15、n the first human mission to Mars. There, youll learn how Max helps make one of the most important discoveries of all time. After returning home, Max and Tori reflect on the beauty and fragility of our own planet Earth. Purchase This BookAda Lace, Take Me to Your Leaderby Emily Calandrelli with Tams
16、on WestonAda Lace likes nothing more than to play with mechanics like her robot, George. Her latest project is to fix up a ham radio, something that she could use to contact people on this planetand beyond. During a sleepover, Adas best friend Nina hears something strange coming from the radio in th
17、e middle of the night. A distant voice says, “Release the swarm (蜂群)!” convincing Nina that aliens are about to invade the Earth.Purchase This Book原材料出处：21. Which book was ever read to kids from the ISS? A. Give me some Space B. Curiosity: The Story of a Mars Rover C. Max Goes to Mars D. Ada Lace, T
18、ake Me to Your Leader22. Whose book introduces Curiosity and her mission? A. Philip Blunting. B. Markus Motum. C. Jeffrey Bennett. D. Emily Calandrelli.23. Who thinks that our planet will soon be attacked by aliens? A. Una. B. Max. C. Ada Lace. D. Nina.B2021原创文主题语境：人与自然宇宙探索难度：Standard 311 words19版译林
19、选必三About 12,000 years ago long before the famous Roswell UFO crash made headlines in America an alien (外星人的) spaceship crashed in China. And their descendants are still living in a faraway Chinese village today! That is the mind-bending claim made in the new book Out of Time and Place, a collection
20、of reports from the files of Fate, a magazine edited by Terry ONeill. The story first came to light in 1937 when an expedition led by Chi Pu-Tei came across a group of caves deep in the Bayan-Kara-Ula Mountains. In the caves were found strange-looking skeletons with big heads and small, slender bodi
21、es closely matching typical descriptions of space aliens. The explorers also uncovered 716 mysterious stone discs with strange hieroglyphics (象形文字) on them. In Qinghai province, where the mountains lie, ancient stories tell of small, skinny beings with oversize heads who came from the sky long long
22、ago. And to this day, locals live in fear of attack from strange-looking creatures from above. And theres more. In 1947, British scientist Karyl Robin-Evans led an expedition into the mountains and discovered a group of dwarfs (侏儒) who called themselves the Droza. “They told him that their ancestors
23、 came from a planet in the Sirius (天狼星) system and crashed in this mountain area a long time ago,” writes Hausdorf, “Many of them were killed, but survivors adapted themselves to living on this rough planet far from home.” For decades, Robin-Evans claims were dismissed as nonsense. But in 1995, the
24、Associated Press reported that in the region a village named Huilong had been recently discovered populated by 120 dwarfs ranging from 3-foot-10 to 2-foot-1 tall. Hausdorf asks, “Could these people be the last living descendants of the survivors of the legendary UFO crash the Chinese Roswell?”原材料出处：
25、.hk/books?id=EfEDAAAAMBAJ&printsec=frontcover&hl=en#v=onepage&q&f=false24. What is the meaning of the underlined word “descendants”? A. Ancestors. B. Siblings. C. Intelligent people. D. Later generations.25. What can be safely concluded from the passage?A. Many people are curious about aliens from o
26、uter space.B. Chinese are descendants of the survivors of the alien spaceship crash.C. The UFO crash in the Byan-Kara-Ula Mountains has recently been seen.D. This passage is a piece of science news recently issued.26. What is most likely to be discussed in the paragraph that follows? A. Robin-Evans
27、claims. B. Chi Pu-Teis discovery in China. C. News stories about Rosewell UFO Crash. D. Recent research about the Chinese Rosewell.C2021原创文主题语境：难度：Standard 298 words19版译林选必三Time in Advance by William Tenn(Note: Dont confuse the short story Time in Advance with the title of the volume of four stories
28、 that contains it, called Time in Advance.)William Tenn is one of those science fiction writers who are well-known by dedicated fans and hardly known by casual readers. When asked to choose a favorite William Tenn science fiction short story, many would name The Brooklyn Project, which is almost a p
29、erfect short story. But I like character-driven stories, light-hearted humour and a twist that sneaks up on you, and science fiction author William Tenn delivered truly impressive humour and characterization in Time in Advance.Time in Advance is the story of a man whos about to commit a deadly crime
30、 a crime for which hes already paid his debt to society. Far from being a dark story of a cruel criminal secretly planning a secret murder, Tenns tale takes a light approach. The hero is aiming to commit an awful crime, and not only is nobody about to stop himhis criminal intentions make him a super
31、star. Cool concept, huh?How many times have you read a story that starts off with a good idea? Time in Advance has almost perfect performance. The “what if” in this case is “What if people paid for the crime of murder before they committed it?” Tenn takes this idea and develops its arrangements with
32、 complete and thorough mastery.Tenn shines at surprising endings funny “aha” endings, such as in The Brooklyn Project. Time in Advance not only has that, it also has a “feel good” ending, something really lacking in science fiction today. Yes, the ending somewhat dulls the cutting edge of the social
33、 comment. But it works. I consider Time in Advance truly one of the best science fiction stories of all time.原材料出处：27. Why does the book critic mention The Brooklyn Project? A. To improve the sales of the book. B. To introduce Time in Advance better. C. To express the critics hatred. D. To highlight
34、 its perfect plot.28. Which is true of Time in Advance? A. It consists of four stories. B. Its William Tenns best known book. C. It is sort of humorous. D. It is casually written.29. What do we know about Time in Advance from the last paragraph but two?A. It is a dark story. B. Its a story of supers
35、tars.C. Its hero does something beneficial to the society.D. Its hero is a cold-blooded killer and does his crimes perfectly.30. What do the last two paragraphs center on? A. The mass medias view about the book. B. The meaning of “what if” in the book. C. Ways to start off and end a science novel. D
36、. Features of the books beginning and ending.第二节 七选五（共5小题，每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项（有两项为多余选项）。2021原创说明文主题语境：人与社会科学与技术难度：Standard 287 + 86 words19版译林选必三Eating in SpaceImagine going camping for more than a week with several of your close friends. You would make sure you have plenty of f
37、ood and the equipment to cook and eat it with. The food would have to be stored properly and not spoiled. (36)_ Preparation varies with the food type. Some foods can be eaten in their natural forms, such as brownies and fruit. Other foods require adding water, such as macaroni and cheese or spaghett
38、i. Of course, an oven is provided in the space station to heat foods to the proper temperature. (37)_, so space food must be stored and prepared properly to avoid spoilage, especially on longer missions.Condiments (调味品), such as ketchup, mustard and mayonnaise, are provided. Salt and pepper are avai
39、lable but only in a liquid form. This is because astronauts cant sprinkle salt and pepper on their food in space. The salt and pepper would simply float away. (38)_Astronauts eat three meals a day: breakfast, lunch and dinner. Nutritionists ensure the food astronauts eat provides them with a balance
40、d supply of vitamins and minerals. (39)_ For instance, a small woman would require only about 1,900 calories a day, while a large man would require about 3,200 calories. An astronaut can choose from many types of foods such as fruits, nuts, peanut butter, chicken, beef, seafood, candy, brownies, etc
41、. Available drinks include coffee, tea, orange juice, fruit punches and lemonade.(40)_. Astronauts must throw their packages away when they have finished eating. Some packaging actually prevents food from flying away. The food packaging is designed to be flexible and easier to use, as well as to max
42、imize space when stowing or disposing of food containers.A. Calorie requirements differ for astronauts.B. There are no refrigerators in spaceC. As on Earth, space food comes in disposable packages D. Its a difficult process to make and prepare food for space.E. Astronauts basically do the same thing
43、 when they go to space.F. The space food systems team is required to meet the nutritional needs of each crew member.G. There is a danger they could block air holes, dirty equipment or get stuck in an astronauts eyes, mouth or nose.原材料出处：https:/www.nasa.gov/audience/foreducators/stem-on-station/ditl_
44、eating第三部分 英语知识运用（共两节，满分45分）第一节 完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的四个选项（A, B, C, D）中，选出可以填入空白处的最佳选项。2021原创说明文主题语境：人与自然宇宙探索难度：Standard 286 words19版译林选必三Unit 1 Wish you were here词汇Airplanes can fly because of air. The _36_ air moving under their wings is strong enough to hold them up. The wing i
45、s _37_ on top while the bottom is flat. When engines _38_ the wing forward, the air molecules (分子) on top are a little farther _39_. This makes the air there a little thinner, which makes less _40_ on the top of the wing. Meanwhile, there is more pressure on the bottom. In the _41_, the wing is push
46、ed up by the air under it.The air gets thinner the higher you go. Even a spacecraft in a low _42_ is about 125 miles high, much higher than any plane can reach. So it comes as no _43_ that we cant fly a plane to space. You need a(n) _44_ to get to even the lowest Earth orbit. Rockets do not need _45
47、_ air to lift them. Rockets use _46_ some of the basic laws of _47_. One of these is called Newtons third law. It says for every action there is an equal and _48_ reaction. You can see this law when you _49_ up a balloon and let it go without _50_ it. The air rushes out of the mouth of the balloon.
48、Now its _51_ to see the balloon fly the other way. The rocket needs to _52_ out much material at a high speed. _53_, it must go in the direction opposite of the way we want the rocket to. Most rockets use high-speed gases, _54_ coming out of the burning rocket fuel and pushing the rockets up and awa
49、y from Earth. They push the rocket up into the _55_ outer space where there is no air. 36. A. invisibleB. thinC. damp D. dry37. A. shiningB. roughC. roundD. smooth38. A. shockB. knock C. pull D. push39. A. alikeB. apartC. aloneD. alive40. A. pressureB. gravityC. energyD. force41. A. viewB. circumsta
50、ncesC. argumentD. foundation42. A. angleB. borderC. orbitD. statue43. A. surpriseB. mannersC. chanceD. resolution44. A. planeB. engineC. rocketD. wing45. A. floatingB. cleanC. concerning D. surrounding46. A. luckilyB. merelyC. mechanicallyD. originally47. A. administrationB. agencyC. disciplineD. na
51、ture48. A. oppositeB. distinctC. immediateD. chain 49. A. boostB. blowC. exposeD. explode50. A. fillingB. occupyingC. tyingD. unfolding51. A. vitalB. dynamicC. elegantD. plain52. A. shootB. putC. sortD. contrast53. A. EventuallyB. SpecificallyC. FurthermoreD. Therefore54. A. frequentlyB. intentlyC.
52、incrediblyD. constantly55. A. telescopeB. universeC. ceilingD. territory原材料出处：标题：Why Cant We Fly a Plane to Space?第二节 语法填空（共10小题；每小题1.5分，满分15分）阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。（共10小题；每小题1.5分，满分15分）2021原创说明文主题语境：人与自然宇宙探索难度：Standard 176 wordsWorking in Space(56)_ (astronaut) perform many tasks as t
53、hey orbit the Earth. The space station (57)_ (design) to be a permanent (58)_ (orbit) research facility. Its major purpose is to perform world-class science and research, (59)_ only a microgravity environment can provide. The station crew spend (60)_ (they) day working on science experiments that re
54、quire their input, as well as monitoring those that are controlled from the ground. They also take part in medical experiments (61)_ (determine) how well their bodies are adjusting to living in microgravity for long periods of time.(62)_ the astronauts work on the space station also means ensuring t
55、he (63)_ (maintain) and health of the orbiting platform. Crew members are (64)_ (constant) checking support systems and cleaning filters, updating computer equipment: doing many of the things homeowners must do to ensure that their largest investment stays in good shape. Similarly, the Mission Contr
56、ol Centre continuously monitors the space station and sends messages each day (65)_ voice or email with new instructions or plans to assist the crew members in their daily routines.原材料出处：第四部分 写作（共两节；满分40）第一节 应用文写作（满分15分）2021山东滨州市博兴县、阳信县高二下期中联考说明文主题语境：人与社会科学与技术难度：Standard 151 words19版译林选必三假设你是李华，你们年级
57、下周要举办一次主题为“展望未来新生活”的英语演讲比赛，请根据以下内容，通过合理想象，写一篇演讲稿。包括：1、太空、海洋探索； 2、人工智能开发；3、材料的回收利用等。注意：1、词数100左右； 2、可以适当增加细节，以使行文流畅。Good afternoon, boys and girls!_Thanks for listening!第二节 读后续写（满分25分）阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。注意：1、所续写短文的词数应为150左右；2、续写部分分为两段，每段开头语已为你写好。2021原创记叙文主题语境：人与社会文学、艺术与体育难度：Standard 354 +
58、169 words19版译林选必三The AlienIt was a cold day in June. I hurried home after my shopping. Just as I walked up the steps that led to the doorway, a sudden dazzle hit my eye. A torrent of light had capsized upon the house and I felt the glow of a thousand suns cascading upon me. The glaring white blinded
59、 my eyes. I dropped my shopping bags and shielded my eyes. I stood still panic stricken.Looking up I saw a fascinating sight. It was a UFO! It was an exact model of the ones in my comic books and fiction movies, so I couldnt possibly have mistaken it for anything else.At the same instant I felt a dr
60、ag at my clothes. I felt shocked at the sight of an alien, humanlike in appearance. And of course he was sea green, as he stood there with his strange enormous eyes staring at me. His eyes were watery with rainbow shades floating in them. He wore a glowing silver metal helmet which was actually his
61、head. The inevitable antenna (触角) glowed and shone green and red as though it were traffic lights. I gathered up courage and said, “Hi!”The alien nodded as though in acknowledgement, but it was not to be. He nodded all the time even when I hadnt spoken to him. Since he seemed to be of a friendly nat
62、ure, I grew braver and extended my hospitality by asking him if he needed food. He grinned and nodded, and I doubted that he understood me.This time I softly touched him stomach and was surprised to find it sounded very metallic though it didnt look it. By now I was enjoying this strange encounter,
63、considering he wasnt harmful, and I really wished to communicate with him. “Food?” I made a chewing sound as if I was eating. Grin, nod. Grin, nod. “Drink?” And I made a drinking sound.He stared bewildered, the rainbow swirling wildly in his eyes. I tried an apple, an orange, a packet of cummin seed
64、s. Words like fridge, lunch, rice made absolutely no sense to him.Paragraph 1：I gestured for my friend to come into the house. _Paragraph 2：He patted my stomach with his fingers a few times and let off more static sounds. _原材料来源：第二单元测试卷参考答案Unit 2 Out of this world第一部分 听力(共两节，20小题，每小题1.5 分，满分30分)15 A
65、BBCC 610 ABBCC 1115 CBCBA 1620 BABCB 第二部分 阅读理解（共两节，满分40分）第一节（共10小题；每小题2.5分，满分25分）2123 ABD 2426 DAD 2730 BCCD 第二节（共5小题，每小题2分，满分10分）3640 EBGAC第三部分 英语知识运用（共两节，满分45分）第一节 完形填空（共20小题；每小题1.5分，满分30分）3640 ACDBA 4145 BCACD 4650 BDABC 5155 DACDB 第二节 语法填空（共10小题；每小题1.5分，满分15分）56. Astronauts 57. is designed/has b
66、een designed 58. orbiting 59. which 60. their61. to determine 62. That 63. maintenance 64. constantly 65. through/by第四部分 写作（共两节；满分40）第一节 应用文写作（满分15分）Good afternoon, boys and girls!Im Li Hua. I feel honoured to be here to share my views on life in the future. With the rapid development of high-tech,
67、our life has changed a lot in the past decades. Many things that wouldnt happen before have come into reality. Therefore, our life will change as well in the future.Perhaps some people will have the alternative to go to the moon for a holiday or live under the sea, which will make their life interes
68、ting and colorful. Besides, in the future maybe each family will rely on robots to do housework and well have more free time to develop our hobbies. Whats more, all the materials can be recycled and nothing will be wasted. Our environment will be much better than now.I believe life in the future mus
69、t be wonderful and exciting, so Ill try my best to work hard for a better future life.Thanks for listening！第二节 读后续写（满分25分）I gestured for my friend to come into the house. He stopped moving once we were before the door. He turned himself to face his space craft and started a few of his beeps and stat
70、ic sounds. I heard a soft crackle from the craft in answer.He patted my stomach with his fingers a few times and let off more static sounds. He then turned towards the space craft and disappeared into the spacecraft. Now I was left there, alone with my thoughts.I wandered into my house like a sleepw
71、alker, and looked out of the window to see a tiny spot twirl and vanish like it always did in my books. I fell in a faint.I woke up in a hospital bed. My nurse gave me my breakfast, but no hunger. I asked about my alien and they gave me a pill to make me doze off. When I woke up I still felt no hung
72、er and refused all food. Everyone was worried, saying that I hadnt eaten for three days. Then four. Then five.“Six” said someone.“Ten!” said someone else.“Twenty!” said my husbands loud voice.Unit 2 Out of this world录音文字稿Text 1M: Oops! My pen is out of ink. I havent finished it yet. W: You can borro
73、w mine. M: Thank you. Ill buy a new one tomorrow. Text 2W: Can we pick up groceries later? I have a dentist appointment at noon.M: Weve been up since 8:00. Im hungry. The dentists is around the corner, and we still have two hours to get there.Text 3M: Sorry, honey. Something has happened with the pr
74、oject and I have to go and deal with it. I may not be back home till very late. W: Its fine. Its not the first time, anyway. Ill ask some friends to go to the restaurant with me instead. Text 4M: How will you figure out the fare?W: Well, the first five kilometers are 2 dollars and every extra kilome
75、ter costs you 30 cents.Text 5W: Where were you yesterday, Tom? I called to ask you to come for dinner. It was my birthday yesterday.M: What a pity! I would love to have come, but actually I had a picnic with my family the whole day.Text 6W: Phillip, could you tell me a little about your background?M
76、: Well. I was born in Taipei. We moved to the U.S. eight years ago. School was really difficult for me at first.W: I imagine. But you must have done all right?M: Yeah well. I graduated from high school three years ago. Now Im at the University of California. I changed my major just half a year ago a
77、nd now Im studying business.W: And why are you interested in joining the Peace Corps?M: Well, Ive always thought it would be great to live in another country.Text 7M: Id like to book a few seats for “Hamlet”, please.W: Yes, sir.M: Have you got any seats downstairs?W: Yes, we have.M: How much are the
78、y?W: $3.75 each.M: Are there any seats for $2.50?W: Yes, there are upstairs. How many?M: Four, please.W: For which night?M: What about Saturday, October 21st?W: I can give you four seats in Row 8.M: How long will the performance last?W: Two and a half hours.M: Thank you. How much will that be in all
79、?Text 8W: Can I help you?M: Yes, I bought the Tshirt in the sale here a couple of weeks ago. I think it was . W: I see, yes . M: And Ive only worn it a few times, but when I looked at it yesterday I just thought, no, I dont like it. I dont think it suits me. The colour is not really right for me. Do
80、 you know what I mean?W: Well . um, do you have any receipt, or proof of purchase?M: No, no, I didnt keep the receipt, sorry. W: Well, we cant normally exchange goods without proof of purchase, you see.M: Oh no.W: I have a word with the manager if you like, see what he says.M: Well yes, if you would
81、 . because I would like to change it.Text 9W: Professor Harvey, do you think that astronomers will find evidence of alien life in your lifetime?M: I think they already have it. Jenna Walsh, whats your opinion?W: We may find life, but it may not want anything to do with us. We are not very advanced a
82、nd cant even get along with each other.M: I think the more important question is will any government ever publicly admit it in our lifetime? I fully believe that we could discover alien life today and the government would simply say the public are not ready for this information.W: I think we already
83、 see it, but just dont realize what it is. Intelligent alien life probably doesnt want anything to do with the pollution that the Earth has, so no doubt theyre playing it safe and observing from a safe distance.M: By alien life, do you mean intelligent alien life? Then no. It would be extremely hard
84、 to find, short of them coming down to Earth. But if you mean unintelligent alien life, like bacteria or single cell, we might.Text 10M: Humanitys interest in the heavens has been universal and endless. Humans are driven to explore the unknown, discover new worlds, push the boundaries of our scienti
85、fic and technical limits, and then push further. Through solving the challenges related to human space exploration we expand technology, create new industries, and help to keep a peaceful connection with other nations. Curiosity and exploration are vital to the human spirit and accepting the challen
86、ge of going deeper into space will invite the citizens of the world today and the generations of tomorrow to join NASA on this exciting journey.The International Space Station serves as a national laboratory for human health, biological, and materials research, as a technology test-bed, and as a ste
87、pping stone for going further into the solar system. On the International Space Station we will improve and learn new ways to ensure astronauts are safe, healthy and productive while exploring, and we will continue expand our knowledge about how materials and biological systems behave outside of the influence of gravity.
