Four people in England back in 1953, stared at Photo 51,It wasn’t much—a picture showing a black X. But three of these people won the Nobel Prize for figuring out what the photo really showed –the shape of DNA The discovery brought fame and fortune to scientists James Watson, Francis Crick, and Maurice Wilkins. The fourth, the one who actually made the picture, was left out.
Her name was Rosalind Franklin.” She should have been up there,” says historian(歷史學(xué)家) Mary Bowden.” If her photos hadn’t been there, the others couldn’t have come up with the structure.” One reason Franklin was missing was that she had died of cancer four years before the Nobel decision. But now scholars(學(xué)者)doubt that Franklin was not only robbed of her life by disease but robbed of credit by her competitors
At Cambridge University in the 1950s, Watson and Click tried to make models by cutting up shapes of DNA’s parts and then putting them together. In the meantime, at King’s College in London, Franklin and Wilkins shone X-rays at the molecule(分子). The rays produced patterns reflection the shape.
But Wilkins and Franklin’s relationship was a lot rockier than the celebrated teamwork of Watson and Crick, Wilkins thought Franklin was hired to be his assistant .But the college actually employed her to take over the DNA project.
What she did was produce X-ray pictures that told Watson and Crick that one of their early models was inside out. And she was not shy about saying so. That angered Watson, who attacked her in return, “Mere inspection suggested that she would not easily bend. Clearly she had to to go or be put in her place.”
As Franklin’s competitors, Wilkins, Watson and Crick had much to gain by cutting her out of the little group of researchers, says historian Pnina Abir-Am. In 1962 at the Nobel Prize awarding ceremony, Wilkins thanked 13 colleagues by name before he mentioned Franklin, Watson wrote his book laughing at her. Crick wrote in 1974 that “Franklin was only two steps away from the solution.”
No, Franklin was the solution. “She contributed more than any other player to solving the structure of DNA . She must be considered a co-discoverer,” Abir-Am says. This was backed up by Aaron Klug, who worked with Franklin and later won a Nobel Prize himself. Once described as the “Dark Lady of DNA”, Franklin is finally coming into the light.
1.What is the text mainly about?
A. The disagreements among DNA researchers.
B. The unfair treatment of Franklin.
C. The process of discovering DNA.
D. The race between two teams of scientists.
2.Watson was angry with Franklin because she .
A. took the lead in the competition
B. kept her results from him
C. proved some of his findings wrong
D. shared her data with other scientists
3.Why is Franklin described as “Dark Lady of DNA”?
A. She developed pictures in dark labs.
B. She discovered the black X-the shape of DNA.
C. Her name was forgotten after her death.
D. Her contribution was unknown to the public.
4.What is the writer’s attitude toward Wilkins, Watson and Crick?
A. Disapproving. B. Respectful.
C. Admiring. D. Doubtful.
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:高中英語 來源:2015-2016學(xué)年浙江湖州中學(xué)高一下學(xué)期期中考試英語試卷(解析版) 題型:單項(xiàng)填空
Now that you are a middle school student, you should learn to be _____ of your parents’ help.
A.energetic B. obvious C. independent D. religious
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年云南開遠(yuǎn)第四中學(xué)高一下學(xué)期期中考試英語試卷(解析版) 題型:單項(xiàng)填空
There is no doubt _____ humans should protect the environment.
A. that B. which C. what D. why
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年河北定興第三中學(xué)高一下學(xué)期第三次6月月考英語試卷(解析版) 題型:閱讀理解
We were on the way from Hutchinson to Chicago for a short spring break. For many years I had wanted to take my family on the train. We all had been to Chicago four years ago, and the kids loved it. Chicago is one of my favorite cities, too, so the thought struck me again last fall to ride the train to Chicago. Of course, flying would have been faster. But I don’t think flying is easier, especially these days, with all the security and waiting in lines at airports.
Though we were tired in the middle of the night, the kids got on the train with the exhilaration of this adventure. “We’re moving,” my son William shouted happily with big eyes as the train began to pull away from the Hutchinson station.
I removed my shoes and lay down to try to finish my night’s sleep. The sleeper car would have better enabled that, but the ordinary train seats were not too bad. An airline flight is a harder experience for me: not enough room, two hours of pain with my knees almost touching my mouth. On the train I could almost outstretch all of my 6-foot-2-plus body in the generous legroom.
The journey didn’t feel at all as long as it was. We all found the train ride a joy. The car ride would have felt every minute of 13 hours. But on the train you are free to walk around, sit in the observation carriage for a while and enjoy the scenery out the windows, have a nice meal in the dining car, read a book, or play a board game.
In short, the train is all about enjoying the trip, which isn’t something I do so much when traveling by airline or by car, when the trip seems more of a mission (任務(wù)) to get there than an experience to enjoy along the way.
Chicago offers much to do for a family. This time, getting there was half the fun.
1.We can learn from the first paragraph that _____.
A. the kids love the train journey
B. it was the first time that the kids were taken on the train
C. the author didn’t enjoy the long train journey
D. Chicago is one of the kid’s favorite cities
2.What does the underlined word “exhilaration” in Paragraph 2 probably mean?
A. Tiredness. B. Relaxation.
C. Excitement. D. Worry.
3.In the third paragraph, an airline flight experience is mentioned to show _____.
A. a train ride is more comfortable
B. a train ride is too long
C. an airline flight is miserable
D. an airline flight is easier
4.Which of the following words best describes the whole family’s feeling about the train journey?
A. Moved. B. Nervous.
C. Disappointed. D. Delighted.
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年浙江諸暨中學(xué)高一下學(xué)期期中英語試卷(解析版) 題型:語法填空
語法填空
閱讀下面短文,按照句子結(jié)構(gòu)的語法性和上下文連貫的要求,在空格處填入一個(gè)適當(dāng)?shù)脑~或使用括號(hào)中詞語的正確形式填空,并將答案填寫在標(biāo)號(hào)為1-10的相應(yīng)位置上。
A young American woman worked in a school in Shanghai. _________ she came to China,she knew little about the Chinese culture of language. One day on her way to school,she went to a bank _________ (draw) some money.To _________ surprise,the bank clerk(職員) asked her if she had had her lunch.She was surprised at such _________ question because in the American culture it would mean that the bank clerk is inviting her to lunch.Between unmarried young people it can also mean the young man’s interest in dating the girl.Since this bank clerk _________ a stranger to the American woman,she was very puzzled(困惑的),and quickly answered that she _________ (eat) already.After this she went on to school and was even _________ surprised when one of the teachers asked her the same question.
By now she understood that it could not be an _________ (invite) but was puzzled as to why they asked it.In the following days she was asked the same question again and again and she spent many hours _________ (try) to work out why so many people kept asking her this.At last she thought that these people must be _________ (concern) about her health.She was rather thin at the time,and she thought they must be worrying that she was not eating well!
In fact the question like that has no real meaning at all — it is only a greeting.
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年湖北襄陽第五中學(xué)高二3月月考英語試卷(解析版) 題型:完形填空
完形填空
閱讀下面短文,從短文后各題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出可以填入空白處的最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。
My class and I visited Chris Care Center in Phoenix, Arizona to comfort the old people who needed a little cheering up during the holiday season.
The first two _________ there were for persons requiring help in taking care of themselves. We sang _________ for them. They loved our sweet songs and the flowers that we left with them.
As we were _________ on the third floor for old people with Alzheimer (老年癡呆癥), most of them _________ off at the walls or floor. However, one lady _________ my eye. She was sitting by the door, in a wheelchair, singing songs to herself. They weren’t the songs that we were singing, at least they didn’t _________ like that. As we got _________ with each festive song, she did as well. The louder we got, the louder she got. _________ she was singing, she was also _________ out to us with her hands and body. I knew that I should have gone over to her, but I thought that my _________ were to my students. People who worked at the care center could _________ to her, I thought. Just when I stopped feeling_________ about not giving her the attention she needed, one of my students, Justin, showed me what the holiday season is really about.
Justin also _________ the same lady. The difference between us is that he _________ on her needs, but I didn’t. During the last song, “Silent Night,” Justin walked over to her and held her hand. He looked this aged lady in her _________ and with his actions said, “You are important, and I will take my _________to let you know that.” This tired, elderly lady stopped singing and held his hand. Then she touched his cheek with the other hand. Tears began to fall down her face. No _________ can completely describe that touching moment.
It took a boy to_________ me, a man, about kindness and love. Justin’s example of a complete, selfless attitude toward another was a _________that I will never forget. He was the teacher that day, and I consider myself _________ to have witnessed his lesson.
1.A. rooms B. buildings C. groups D. floors
2.A. bravely B. beautifully C. shyly D. madly
3.A. gathering B. meeting C. singing D. dancing
4.A. glared B. shut C. stared D. paid
5.A. looked B. hurt C. escaped D. caught
6.A. sound B. hear C. appear D. feel
7.A. higher B. nearer C. faster D. louder
8.A. As B. Because C. Since D. Though
9.A. moving B. coming C. reaching D. spreading
10.A. interests B. abilities C. responsibilities D. feelings
11.A. speak B. attend C. object D. compare
12.A. guilty B. sure C. afraid D. scary
13.A. feared B. noticed C. helped D. avoided
14.A. called B. insisted C. acted D. kept
15.A. tears B. hands C. face D. eye
16.A. body B. time C. flower D. cheek
17.A. expressions B. poems C. words D. songs
18.A. teach B. waste C. cause D. help
19.A. message B. activity C. lesson D. class
20.A. clever B. foolish C. lucky D. right
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年新疆兵團(tuán)農(nóng)二師華山中學(xué)高一下期中英語卷(解析版) 題型:短文改錯(cuò)
短文改錯(cuò)
假如英語課上老師要求同桌之間交換修改作文,請(qǐng)你修改你同桌的以下作文。文中共有10處錯(cuò)誤,每句中最多有兩處。錯(cuò)誤涉及單詞的增加、刪除或修改。
增加:在缺詞處加一個(gè)漏詞符號(hào)∧,并在此符號(hào)下面寫出該加的詞。
刪除:把多余的詞用斜線\劃掉。
修改:在錯(cuò)詞下面劃一橫線,并在該詞下面寫出修改后的詞。
注意:1.每處錯(cuò)誤及其修改均僅限一詞;
2.只允許修改10處,多者(從第11處起)不計(jì)分。
People are not so honest that they once were. The temptation to steal is greater than ever before ---- especial in large shops. A detective recently watched a well-dressed woman who always went into a large store on Monday mornings. One Monday, there was fewer people in the shop than usual when the woman came in, but it was easier for the detective to watch her. The woman first bought for a few small articles. After a little time, she chose one of the most expensive dressed in the shop and hand it to an assistant who wrapped it up for him as quickly as possible. Then the woman simply took the parcel and walked out to the shop with paying. When she was arrested, the detective found that the shop assistant was her daughter. The girl ‘gave’ her mother the free dress once a week!
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年廣西桂林第十八中學(xué)高二下期中英語試卷(解析版) 題型:書面表達(dá)
書面表達(dá)
近年來,桂林開展了“綠色出行”(Green Transportation)計(jì)劃,向市民提供了大批量的公共自行車。學(xué)校將舉辦以此為主題的演講比賽,請(qǐng)你以“Let’s Ride Bicycles”為題,撰寫一篇演講稿,主要內(nèi)容包括:
1. 表明觀點(diǎn):倡導(dǎo)“綠色出行”
2. 簡(jiǎn)述倡導(dǎo)“綠色出行”的理由(如:環(huán)境保護(hù),有益健康等)
要求:1. 可適當(dāng)增加細(xì)節(jié)使行文連貫 2. 書寫規(guī)范,卷面整潔 3. 字?jǐn)?shù):100詞左右 (開頭已給,不計(jì)入總詞數(shù))
Good afternoon, everyone! ___________________________________________________.
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
查看答案和解析>>
科目:高中英語 來源:2015-2016學(xué)年四川新津中學(xué)高二6月月考英語試卷(解析版) 題型:語法填空
閱讀下面的材料,在空白處填入適當(dāng)?shù)膬?nèi)容(不多于3個(gè)單詞)或括號(hào)內(nèi)單詞的正確形式。
Tu Youyou, 1. was born in 1930, is a Chinese medical scientist and educator. She was educated and carried out research 2. (entire) in China. She is best known 3. discovering artemisinin(青蒿素) and dihydroartemisinin(雙氫青蒿素),which saved millions of lives. Her discovery of artemisinin as well as 4. (it) treatment of malaria 5. (regard) as a significant breakthrough of tropical(熱帶的) medicine in the 20th century and health 6. (improve) for people of tropical 7. (develop) countries in South Asia, Africa, and South America.
For her work, Tu received the 2011 Lasker Award in clinical medicine and 8. 2015 Nobel Prize in Physiology(生理學(xué)) or Medicine together with William C. Campbell and Satoshi Omura. Tu is the first Chinese Nobel winner in Physiology or medicine 9. the first citizen of the People’s Republic of China 10. (receive) the Nobel Prize in natural sciences.
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