Is there intelligent (有智力的) life on other planets? For years,scientists said “no. ” or “we、don't know."But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文车家).
They believe intelligent life exists (存在) somewhere in the universe. They also think we will soon con-tact these beings (人;生物). Why do Shostak and Barnett think intelligent life exists on other planets?
The first reason is time. Scientists believe the universe is about 12 billion years old. uThis is long e-
nough for other planets to have intelligent life”，say Shostak and Barnett. The second reason is size— the universe is huge. “Tools like the Hubble Telescope (哈勃望远镜) have shown that there are at least 100 billion galaxies”，says Shostak. “And our galaxy,the Milky Way,has at least 100 billion stars.
Some planets going around these stars might be similar to Earth.
In the past,it was hard to look for signs of intelligent life in the universe. But now,powerful tele-
scopes (高倍望远镜) allow scientists to discover smaller planets—the size of Mars or Earth—m other
solar systems. These planets might have intelligent life. Have beings from space already visited Earth?
“Probably not ,” says Shostak. “It's a long way away. However,intelligent beings may contact us in other way,such as radio signals (信号). In fact,they may be trying to communicate with us now,but we don't have the right tools to receive their messages. However,this is changing. By 2025,we could make contact with other life forms in our universe and we might help each other.
() 1. Seth Shostak and Alexandra Barnett are.
A. astronomers B. farmers
C. singers D. drivers
() 2. What is the best title for Paragraph 2 ?
A. The Age and Size of Earth B. Our Galaxy： The Milky Way
C. Why Intelligent Life Might Exist D. Earth： The Only Planet with Intelligent Life
() 3. Why was it hard to look for signs of intelligent life in the universe in the past?
A. There were not any smaller planets.
B. There were not any powerful telescopes.
C. The astronomers were not interested in them.
D. The Milky Way didn't exist at that time.
() 4. Why haven 51 beings from space visited us yet according to Shostak?
A. They'e afraid of us. B. It's a long way away.
C. They don't want to see us. D. They don't know how to use radio signals.
() 5. What does the underlined phrase “life forms” in the last paragraph mean?
A. Messages B. Tools
C. Intelligent beings D. Radio signals
[解析]本文叙述了科学家认为其他星球也存在智能生命，因为宇宙形成的时间这么长，足够其他星球 形成生命；其次宇宙这么大，周围会有跟地球相似的 星球。不久来自太空的生命有可能将会和我们联 系，我们可能到2025年，也会和他们取得联，系，我们 可能会互相帮助。
1. A 细节理解题。根据 Seth Shostak and Alexandra Barnett are astronomers (天文学家) 可知 Seth Shostak 和 Alexandra Barnett 是天文学家。故选A
2. C 标题归纳题。根据 Why do Shostak and Barnett think intelligent life exists on other planets?
可知本文主要解释为什么认为在其他星球上可能 有智能生命存在，故选C.
3. B 推理判断题。根据 In the past,it was hard to look for signs of intelligent life in the universe. But now,powerful telescopes (高倍望远镜) allow scientists to discover smaller planets 可知在 过去没有像现在一样的高倍望远镜，因此很难在宇宙中 寻找到智能生命的迹象。故选B.
4. B 推理判断题。根据 “ Probably not ,” says Shostak. It's a long way away.可知 Shostak 认为
来自太空的生命可能没有来过地球，因为路途遥 远。故选B.
初中学业考试导与练系列答案科目：初中英语 来源： 题型：
English is difficult to learn because it is so different from our mother tongue (母语). Also,we don't have much chance to speak English with foreigners or hear English s 1 .
So the first important thing for us to do,I think,is to p 2 speaking English more both in and
out of class. In class I listen to the teacher carefully and t 3 my best to answer the teacher's questions
in English. After class,I listen to the tapes and wonderful English songs. I often retell the texts in my own words. I always work hard at English and n 4 give up.
Of course this is not enough. When I find something interesting,I wrote it down in English. At first,I couldn’t write well,but with the help of my teacher,I have made great p 5 .
请将答案填在下面相应横线上：
1. 2. 3. 4. 5.
查看答案和解析>>
科目：初中英语 来源： 题型：
Scientist Without Laboratories
When you hear the word “scientist”，what do you think of? Many people think scientists are peo-pie in clean white coats who work in labs. And some scientists do work in labs. But there are 1 scientists who work in woods and jungles. These scientists are called ^animal behavior (行为) scientists”， and they study animals as they live in nature.
Why don't these scientists catch animals and study them in zoos? The 2 is in the word “behavior”. Animals behavior scientists want to learn 3 animals behave in their wild homes. When animals live in cages (笼子) or in zoos,they do not act the same as they do when they are 4 . They may fight 5 each other,or they may not eat,or they may not raise (抚养) their babies as they usually would. To see real animal behavior,scientists must go where the animals 6 .
So animal behavior scientists go into the jungles,the woods or the desert. There,their most important 7 are their eyes and ears. They watch and listen to the animals very 8 . They write down everything that happened in notebook. 9 they live near the animals,the scientists are careful not to frighten them. If the scientists are lucky,the animals will 10 no attention to them. Then the scientists can see how the animals really live.
The behavior scientists hope what they’ve learned about animal behavoir can provide clues (提供线 索) to help people learn to live together more happily.
() 1. A. another B. other C. others D. the other
() 2. A. answer B. question C. problem D. text
() 3. A. when B. where C. how D. why
() 4. A. happy B. free C. sad D. angry
() 5. A. of B. among C. for D. with
() 6. A. live B. run C. play D. eat
() 7. A. machines B. tools C. thoughts D. ways
() 8. A. truly B. carefully C. wonderfully D. nicely
() 9. A. But B. Unless C. Though D. As if
() 10. A. pay B. spend C. take D. cost
查看答案和解析>>
科目：初中英语 来源： 题型：
In nature,you may see many insects (昆虫) and animals of different colors. Have you ever won-dered why?
Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them. It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops (庄稼). When crops are young,locusts look green. But when autumn comes,locusts change to the yellow and brown color as crops do.
Brown bears,tigers and other animals move quietly through forests. They can't be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason,polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil (土壤) in a dark and wet environment. However,insects with colors different from plants can easily be found and eaten by others. So in order to survive,they have to hide themselves in the daytime and appear only at night.
Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over,its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.
() 1. It is not easy for birds to catch locusts because .
A. locusts are good runners B. locusts can jump very high
C. locusts are smarter than birds D. locusts can change their colors
() 2. According to the passage,most soil insects .
A. do not have bright colors B. change their colors with the soil
C. do not live in a dark and wet environment D. eat colorful insects like butterflies and bees
() 3. What's the meaning of the underlined word “survive” in the passage?
A. 繁殖 B. 产卵 C. 觅食 D. 生存
() 4. The ink fish so that its enemies will not see it.
A. changes its color B. makes the water around it black
C. appears only at night D. hides itself in the sea rocks
() 5. What is the main idea of this passage?
A. Some insects and animals have different skills.
B. Some insects and animals are clever than we think.
C. Some insects and animals use colors to protect themselves.
D. Some insects and animals can get used to the environment easily.
查看答案和解析>>
科目：初中英语 来源： 题型：
For years scientists have been arguing about whether nature or nurture (后天) decides what people
will be like. Is it nature —what people are 1 with—that decides what they will be like? 2 is it nurture—what 3 to people when they are born —that decides what they will be like?
Scientists have been studying twins to 4 if they can Hnd the answer,because twins start out with the 5 DNA. Sometimes twins don't live together at birth and grow up in different 6 and different places —so the nature is the same for both,but the nurture is different.
When scientists 7 these twins in their later life,they some times find some surprising 8 .
Jim Springer and Jim Lewis were adopted (收养) by two different families at birth. They first met each other again thirty-nine years 9 and discovered they had a lot in 10 . Both had been 11 twice. Their first wives were both named Linda and their second wives were both named Betty!
Each twin had a son —one called his son James Alan and the 12 called his son James Alan,too. Their children each had a dog called “Toy”. They even arrived at their first 13 in the same color of car.
So far twin 14 seem to show that both nature and nurture are important. What we have from birth,and how and where we live help to build 15 we are.
() 1. A. born B. grown C. taught D. made
() 2. A. So B. And C. If D. Or
() 3. A. pretends B. happens C. falls D. depends
() 4. A. hear B. win C. see D. plan
() 5. A. nice B. same C. full D. free
() 6. A. families B. cities C. countries D. nations
() 7. A. believe B. suggest C. receive D. compare
() 8. A. numbers B. discoveries C. results D. decisions
() 9. A. ago B. later C. forward D. behind
() 10. A. common B. fact C. danger D. trouble
() 11. A. mentioned B. married C. succeeded D. interviewed
() 12. A. either B. else C. other D. only
() 13. A. competition B. education C. purpose D. meeting
() 14. A. studies B. movies C. challenges D. mysteries
() 15. A. what B. when C. where D. who
查看答案和解析>>
科目：初中英语 来源： 题型：
Mike Myers is a teacher at Chauncey Rose High School in Terre Haute,Indiana. Last year,he taught his students about the worlds rain forests. They learned that rain forests are important because the plants and animals of the rain forest give us food,wood? and medicine.
Destruction of the world's rain forests is a serious problem. Unluckily,rain forests are disappea-ring at a rate of 80 acres per minute!As part of a class project,Myers’ students bought three acres of rain forest in Central America. They paid $ 25 per acre. The students hope that the land they bought will be protected and not destroyed. The students became so interested in rain forests that they decided to get a closer look at a real rain forest.
So last June,Myers and four of his students took a boat ride down a river. They saw alligators and crocodiles. In the middle of the week,a guide took Myers and his students into the rain forest. uThe monkeys were not happy that we were in their forest. They broke small branches off the trees and threw them at us”’ one of the students said ,“It was a great learning experience for all of us ,” said Myers.
Each student chose something specific about Costa Rica to study involving the plants,animals , food,and culture. During the last few days the group had time to do fun activities. They went white-water rafting and horseback riding,and visited Costa Rica's active volcano.
Myers hopes to make the trip every year with a different group of kids.
() 1. How much did Myers 5 students pay for the rain forest they bought?
A. $25 B. $75 C. $80 D. $ 2000
() 2. What did Myers and his students do at the beginning of the trip?
A. They went into the rain forest. B. They bought acres of rain forest.
C. They took a boat ride down a river. D. They visited Costa Rica's active volcano.
() 3. The word “Destruction” in paragraph 2 probably means “the process of being . ”
A. destroyed B. developed C. described D. discovered
() 4. When the monkeys saw Myers and his students,they .
A. felt excited B. felt angry C. jumped off the trees D. left the rain forest
() 5. The passage mainly shows that Myers and his students .
A. did something to protect rain forest
B. wanted to buy the rain forest in Costa Rica
C. were interested in the culture of Costa Rica
D. went to the rain forest for various fun activities
查看答案和解析>>
科目：初中英语 来源： 题型：
National parks are large of areas of public land. They give a safe home for local plants and animal. They help keep the air and water clean. They also give us the best trips. Today,there are nearly 7 ,000 national parks around the world. Forbes has listed 12 of the most beautiful ones in the world that will surprise you with their amazing landscape,geographic wonders and colorful plants and animals.
The Grand Canyon National Park of the US is one of the Seven Natural Wonders of the World. It is best known for its size and depth. It is 446 kilometers long,up to 29 kilometers wide,and 1. 6 kilometers deep. The immensity of the canyon makes people think big. Every year,about 5million people visit here. Taking a tour in the South Rim offers visitors the park's full views,while the North Rim shows beautiful wild flowers.
If you love animals,you’ll like the Serrengeti National Park in Tanzania. The “Big Five”live here. They are the lion,African elephant,African leopard,black rhinocero and African buffalo. The name 4<Big Five,Jcame from the five animals that were the hardest to catch. Now they are what people most want to see in the wild. If you visit the park,you should never miss the migration of over 1. 5 million wildebeests and 250,000 zebras every year. This is the most famous site of the park.
() 1. Which is NOT right about national parks according to Paragraph 1 ?
A. A national park is public land that covers a large area.
B. Wild plants and animals are protected in national parks.
C. Forbes has listed twelve of the world's largest national parks.
D. National parks are attractive because of their natural beauty.
() 2. The underlined word‘‘immensity”refers to .
A. great size B. natural wonder C. colorful view D. unusual beauty
() 3. kinds of animals are mentioned in the passage.
A. Five B. Six C. Seven D. Eight
() 4. The best title for the passage may be “ ”.
A. Taking a tour in the Grand Canyon
B. Travelling to the Serengeti National Park
C. Seven National Wonders of the World
D. Stepping into the wonders of the wildlife
() 5. If the writer continues the article,he would most likely write about.
A. ways to keep the air and water clean
B. more national parks in the world
C. his wonderful trip to the Grand Canyon
D. famous historic wonders in Africa
查看答案和解析>>
科目：初中英语 来源： 题型：
Passage A
1话题 | 郎朗 | 1文体 | 记叙文 | 词数 | 170 | 限时 | 7分 | 正确率 | % |
What's your favorite cartoon? It may be difficult for you to decide. But for pianist Lang Lang,Tom and Jerry is the best one. When Lang was two years old,he saw Tom play the piano. This was his first time to enjoy western music and this experience encouraged him to learn to play the piano.
His talent at the keyboard has taken him from Shenyang to the world. Lang became a good piano student at three. Ever since,the boy has been doing better and better. In 1997,the 15-year-old boy studied at a famous American music college.
Lang performances are energetic. He is well-known for making facial expres sions and moving around while playing the piano.
The road to success has never been easy. Lang's father stopped his job to look after him,while his mother stayed in Shenyang to make money. But Lang thinks himself lucky and believes he should give something back. He has helped the children in poor areas a lot.
() 1. What made Langlang first enjoy western music?
A. When he played the piano at three. '
B. When he saw Tom play the piano at two.
C. When he listened to the western music on the radio.
D. When his father taught him to read music.
() 2. How old was Langlang when he became a student of a famous American music college?
A. Two. B. Three. C. Five. D. Fifteen.
() 3. What is Langlang famous for?
A. He is famous for playing the guitar.
B. He is famous for singing.
C. He is famous for writing music.
D. He is famous for making facial (面部的) expressions and moving around while playing the piano.
() 4. Why did Langlang5s mother stay in Shenyang?
A. Because she liked Shenyang,she didn't want to leave.
B. Because she had to look after Langlang's grandparents.
C. Because she had to make money to pay for Langlang^ education.
D. Because she didn't love her son.
() 5. From the passage,we can say it Langlang and his parents a lot of time to get success.
A. spent B. paid C. took D. cost
查看答案和解析>>
科目：初中英语 来源： 题型：
Dear Amy,
I am so 1 to get your letter. I am glad you like your school. Now let me tell you about my school.
I go to school five days a week. We have four lessons 2 the morning and two lessons in the afternoon. We have many interesting things 3 after class. On Monday and Wednesday,we have 4 on the playground. On Tuesday afternoon,some of 5 have an art class. On Thursday afternoon,some have a 6 class in the music room. We can enjoy beautiful music. On Friday afternoon,we practice 7 English with the teacher. My Chinese friends would like 8 with me in English. They think I am like an English teacher. Isn’t it great? On Saturdays and Sundays,I 9 go to school. Very often I go to the parks and have a good time with my family there.
I love my school 10 enjoy my school life. What about you?
Yours,Helen
() 1. A. sad B. hungry C. happy D. kind
() 2. A. on B. in C. to D. at
() 3. A. doing B. does C. do D. to do
() 4. A. sport B. sports C. a sport D. some sport
() 5. A. we B. us C. them D. they
() 6. A. singing B. sings C. song D. sing
() 7. A. speak B. to speak C. speaks D. speaking
() 8. A. to talk B. talk C. talks D. talking
() 9. A. don't B. doesn’t C. not D. can't
() 10. A. and B. but C. so D. or
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com