Think stars don’t move? Think again! When you look at the sky at night, the stars may appear to stay in the same place. But stars are always on the move—they are just so far away that the movement is hard to see.
But some stars move in ways that appear to be strange to be real. In 2005, astronomer Warren Brown found one of these space oddities(奇特). It was located on the outer edge of the Milky Way, the galaxy(星系) we live in. The star was speeding away like nothing he’d ever seen. “It seemed unbelievable. No star in the galaxy has a speed like that,” Brown remembers. “I thought, oh my goodness, I have something kind of special here.”
No one had ever seen a star like this one. What does a scientist do when the results don’t make sense?
Brown didn’t give up. Instead, he kept looking. And he kept finding more of these strange and speedy stars, called hypervelocity stars. Hyper means “above” and velocity has to do with speed. He and his team just found six more of these “above speed” stars, bringing to the total of 16. And, he says, he’s found even more, and is just waiting for the scientific community to confirm them.
【小題1】In 2005, astronomer Warren Brown found___________.
A.a(chǎn) star was speeding away very fast. |
B.a(chǎn) stars was moving away very slowly. |
C.some stars were not real. |
D.some stars were not in the Milky Way. |
A.Stars never move at all. |
B.No star in the galaxy has a fast speed. |
C.It’s hard to see the stars moving. |
D.Brown has never seen something special. |
A.勻速的 | B.超速的 | C.超重的 | D.超常的 |
A.something about an astronomer. |
B.where the Milky Way is |
C.something about the speedy stars. |
D.how scientists do their research |
年級(jí) | 高中課程 | 年級(jí) | 初中課程 |
高一 | 高一免費(fèi)課程推薦! | 初一 | 初一免費(fèi)課程推薦! |
高二 | 高二免費(fèi)課程推薦! | 初二 | 初二免費(fèi)課程推薦! |
高三 | 高三免費(fèi)課程推薦! | 初三 | 初三免費(fèi)課程推薦! |
科目:初中英語(yǔ) 來(lái)源:2009年初中畢業(yè)升學(xué)考試(山東臨沂卷)英語(yǔ)(帶解析) 題型:補(bǔ)充句子
Kim: What do you want to do in the future, Bob?
Bob: I want to become a well-known writer. 【小題1】
Kim: I want to be a singer. I enjoy singing very much.
Bob: I always hear you sing in your classroom and in the dormitory.
Kim: You know, practicing is very important. My teacher always asks me to practice as much as possible.
Bob: 【小題2】
Kim: Three hours a day on weekdays and six hours a day on weekends.
Bob: Do you think it is boring to practice singing every day?
Kim: 【小題3】Singing is a great pleasure for me. I have entered for the “Future Star Cup” singing contest. It will be held next week.
Bob: Do you think you will win in the contest?
Kim: Yes. Before I entered for this contest, I had already taken part in many singing contests, and I had won some prizes. I’m very confident about myself. By the way, I’ve heard that our school held a composition (作文) contest last week. 【小題4】
Bob: No. I didn’t think I would win it. I don’t practice writing compositions much, you
know.
Kim: You should write more and take every chance to practice, or your wish to become a great writer will not come true.
Bob: 【小題5】
Kim: You’re welcome.
A. No, of course not. B. Did you take part in it? C. Will you win in the contest? D. What about you, Kim? E. Thank you for your advice. F. How long do you sing every day? G. How often do you practice writing? |
查看答案和解析>>
科目:初中英語(yǔ) 來(lái)源:2013-2014學(xué)年遼寧丹東市九年級(jí)上學(xué)期期中考試英語(yǔ)試卷(解析版) 題型:補(bǔ)充句子
從方框中選擇恰當(dāng)?shù)木渥油瓿上旅娴膶?duì)話。
A: Excuse me, where is Seven Star Park, please? I’m a stranger here.
B: 1.
A: How far is it from here?
B: 2.
A: Well, how can I get there?
B: 3.
A: Which bus should I take?
B: 4.
A: Can it take me right there?
B: 5.
A: Thank you very much. See you later.
B: See you.
A. Either No. 11 bus or No. 18 bus is OK.
B. How long does it take?
C. It’s about two kilometers away.
D. Yes, the park is just next to the bus stop.
E. Oh, it’s a little far from here.
F. I think you’d better take a bus.
G. The bus ride usually takes about 25 minutes.
查看答案和解析>>
科目:初中英語(yǔ) 來(lái)源:2012-2013學(xué)年江蘇省泰州市高港實(shí)驗(yàn)學(xué)校九年級(jí)上學(xué)期期中考試英語(yǔ)試卷(解析版) 題型:單詞拼寫(xiě)
詞匯運(yùn)用用括號(hào)內(nèi)所給詞的適當(dāng)形式填空(每空不限一詞)。(15分)
1.Zhang Yi-Mou is one of the most famous (direct) in China.
2.I’m afraid, I have no choice but ____________ (take) a taxi.
3. My father likes reading. He often buys (week) newspapers to read.
4. The problem is that Andy is ____ (active) and doesn’t like to talk with others.
5.___________ (keep) healthy, I decide to eat less and exercise more.
6.You’re __________ (suitable) person to take this job in our class.
7.Students __________ (not allow) to smoke.
8.Sandy _________ (prefer) jogging to running when she was young.
9.Tom’s star sign is Aquarius, he likes to do everything _________ (different)
10. The problem of stress gets worse when people keep their worries to ___ (they).
11.My mother is far too busy____________(do) housework.
12.To tell you the _____________(true), I often quarrel with my parents.
13. My classmate, Jack, has just found a book __________(lie) on the playground.
14.In fact, many teenagers have no _________(communicate) with family members.
15.I think you can talk to your friends when_____________(feel) sad.
查看答案和解析>>
科目:初中英語(yǔ) 來(lái)源:2012-2013學(xué)年江蘇無(wú)錫宜興外國(guó)語(yǔ)學(xué)校八年級(jí)上期期中考試英語(yǔ)試卷(解析版) 題型:其他題
動(dòng)詞填空用括號(hào)內(nèi)所給動(dòng)詞的適當(dāng)形式填空。(本大題共10分,每小題1分)
1.I often spend as much time as I can _____ (practice)softball after class.
2.Look! He _____ (look)so happy.
3.When the super star arrived, all the people stopped _____ (cheer)for him.
4._____ (be)stronger, you need to exercise a lot.
5.He _____(hide)my bike behind the tree and I didn't find it.
6.There _____ (be)a football match between Class 1 and Class 2 next Tuesday, is there?
7.Nobody but him _____ (exercise)with his classmates every morning.
8.It _____ (get)darker and darker. I'm sure it'll rain soon.
9.Tina shows us how _____ (sew)in Home Economics.
10.I think my buddy, Amy _____ (be)a social worker when she grows up.
查看答案和解析>>
科目:初中英語(yǔ) 來(lái)源:2012年初中畢業(yè)升學(xué)考試(江蘇徐州卷)英語(yǔ)(解析版) 題型:完型填空
Lisa has always been overweight. She wanted to lose weight, not just because she wanted to 16 more beautiful and he healthier, but also because it would make life easier. For example, it was 17 for Lisa to find ready-made clothes that would fit. She had to ask a tailor(裁縫) 18 clothes that were large enough. In school, she needed a special chair 19 was bigger and stronger than the other chairs. If she went for a walk, she got tired very quickly. She was also unhappy about the way people treated 20 sometimes. “People look at me and even make fun of me. That’s unfair! It’s true that I’m overweight, but I don’t think people 21 treat me differently because I’m big. I can’t enjoy 22 with my friends because I’m afraid of getting fatter.” Her friends and family never made fun of her. They tried to help her 23 . They wanted her to be happy and healthy. Sometimes when Lisa was feeling sad, she didn’t want to speak to 24 .
But now things 25 quite different. Last month her classmates were preparing for the School 26 Week. Someone advised Lisa to play the lead role of the proud Queen(女王) who was tall and fat. Lisa 27 and practiced a lot.
Soon after the play, Lisa became the star! She did 28 well that everybody remembered the proud Queen. They stood around her and said “ 29 ” to her. She even won the School Best Actress Award for her wonderful performance.
Now Lisa doesn’t worry 30 being fat any more. She believes in the English saying “Every dog has its day.”
1.A. see B. watch C. notice D. look
2.A. easy B. difficult C. wrong D. right
3.A. making B. makes C. make D. to make
4.A. who B. what C. which D. whose
5.A. her B. him C. me D. you
6.A. can B. may C. should D. must
7.A. having dinner B. to have dinner C. doing sports D. to do sports
8.A. however B. instead C. though D. either
9.A. nobody B. someone C. anyone D. everyone
10.A. was B. is C. were D. are
11.A. Sports B. Art C. Science D. Environment
12.A. agreed B. disagreed C. refused D. allowed
13.A. very B. too C. such D. so
14.A. Sorry B. Good luck Congratulations D. Good-bye
15.A. with B. about C. in D. for
查看答案和解析>>
百度致信 - 練習(xí)冊(cè)列表 - 試題列表
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺(tái) | 網(wǎng)上有害信息舉報(bào)專區(qū) | 電信詐騙舉報(bào)專區(qū) | 涉歷史虛無(wú)主義有害信息舉報(bào)專區(qū) | 涉企侵權(quán)舉報(bào)專區(qū)
違法和不良信息舉報(bào)電話:027-86699610 舉報(bào)郵箱:58377363@163.com