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 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 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 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.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.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 |
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.What is the writer’s attitude toward Wilkins, Watson and Crick?
A.Disapproving. | B.Respectful. | C. Admiring. | D.Doubtful. |
When we look at the sky and see a bright light moving quickly across it or coming towards the earth, we talk about seeing a “shooting star” or a “falling star”. These moving lights are not, in fact, stars at all. They are small pieces of matter from outer space, which burn up as they enter the Earth’s atmosphere. The correct name of them is meteoroids. Any pieces that make it to the Earth’s surface without completely burning up are known as meteorites. A meteor is actually the name given to the light we see when a meteoroid is burning up.
When a meteorite hits the Earth at speeds between 11 and 72 kilometers a second, it can do amazing damage. A very large meteorite could knock the earth out of its orbit. If this happened, all life on Earth would probably become extinct(灭绝). The path we follow around the Sun would change and as a result the Earth would become either much hotter or much colder. This change in temperature would affect sea levels and the amount of water in rivers. There would either be huge floods, which would cover most of the land with water, or the oceans would dry up and there would be a drought, which means a long period of time without rain. Either way, nothing could survive. If a large meteorite landed in the sea it would almost certainly cause tsunamis, which would race towards the land, destroying everything in their paths.
Although it is unlikely the Earth will be struck by a meteorite large enough to do that kind of damage, there is evidence of fairly large meteorites hitting the Earth in the past. In 1908 a large area of forest in Tunguska, Siberia was destroyed by a meteorite that came apart just before it hit the ground. The moon, however, has about three billion craters陨石坑caused by meteorites impacting影响 its surface. The reason more meteorites have reached the surface of the moon than the surface of the Earth is that the moon does not have enough atmosphere for the meteorites to burn up in. some of the meteorites that have reached the Earth’s surface have done considerable damage. Some scientists believe it was a change of climate caused by meteorites hitting the Earth that resulted in the extinction of the dinosaurs and other large prehistoric animals.
Scientists are especially interested in meteorites because they contain information about the solar system. It is widely believed by scientists that most meteorites are produced by collisions(碰撞) between asteroids (small planets). These collisions probably happened many billions of years ago. This means the physical and chemical structure of a meteorite can give scientists information about the early days of the universe.The story is about ___.
A.floods caused by meteors |
B.matter from outer space |
C.life on Earth millions of years ago |
D.meteorites that have damaged the moon |
The Earth has ___.
A.three billion craters |
B.fewer craters than the moon |
C.more craters than the moon |
D.a thinner atmosphere than the moon |
Some scientists believe the dinosaurs became extinct because ___.
A.they were hit by meteors |
B.meteorites landed on their nests |
C.meteorites landed and changed the climate |
D.they could no longer breathe the atmosphere |
Meteors are ___.
A.small planets |
B.the same as asteroids |
C.from broken parts of asteroids |
D.the light we see when meteoroids hit our atmosphere |
October 31, 2009, California
Tsien Hsue-shen, PhD'39, one of the founders of the Jet Propulsion Laboratory, died on October 31, He was 98.
Tsien, born in the eastern Chinese city of Hangzhou, graduated from the National Qinghua University in 1934 and in August of 1935 he left China to study at the Massachusetts Institute Technology. In 1936 he went to the California Institute of Technology to commence graduate studies .Tsien obtained his doctor degree in 1939 and would remain at Caltech for 20 years, becoming the Goddard Professor and establishing a reputation as one of the leading rocket scientists in the United States.
In 1943, Tsien and two others in the Caltech rocketry group drafted the first document to use the name Jet Propulsion Laboratory. During the Second World War, he was amongst the other scientists participated the "Manhattan Project" .After World War II he served as a consultant to the United States Army Air Force. During this time, Conlonel Tsien worked on designing an intercontinental space plane. His work would inspire the X--20Dyna-Soar which would later be the inspiration for the Space Shuttle. In1945 Tsien Hsue--shen married Jiang Ying, the daughter of Jiang Baili--one of the Chinese nationalist leader Chiang Kai--shen's leading military strategists. But in 1950, the Chinese-born scientist was accused of harboring Communist sympathies and stripped of his security clearance.
In September 1955 he was permitted to leave for China, where Tsien resumed his research, founded the Institute of Mechanics, and went on to become the father of China's missile program, a trusted member of the government and Party's inner circle, and the nation's most honored scientist, Tsien retired in 1991 and has maintained a low public profile in Beijing, China. The PRC government launched its manned space program in 1992 and used Tsien's research as the basis for the Long March rocket which successfully launched the Shenzhou V mission in October of 2003.The elderly Tsien was able to watch China's first manned space mission on television from his hospital bed.
In his late years, since the 1980s, Tsien devoted himself to spirituality research, and advocated scientific investigation of traditional Chinese medicine, Qigong and "special human body functions".The underlined word "commence" in this passage probably means ____
A.make up | B.get | C.begin | D.promise |
Tsien Hsue--shen got married at the age of ______
A.45 | B.28 | C.24 | D.34 |
What is the right order of the events related to Tsien Hsue--shen ?
a. his later life
b. return to China
c. career in the U.S.A
d. his early life and education
A.a-b-c-d | B.d-c-b-a | C.d-b-c-a | D.c-b-d-a |
Which of the following statements is NOT true?
A.Tsien Hsue--shen got a doctor's degree in 1939. |
B.Tsien Hsue--shen married Jiang Ying, the daughter of Chinese nationalist leader Chiang Kai-shen. |
C.Tsien Hsue-shen has made a contribution to the Space Shuttle. |
D.Tsien Hsue-shen was interested in traditional Chinese medicine, qigong and "special human body functions" in his later life. |
Egypt: Bridging the Gap between School English and Real English
Teaching English in Egypt in general and in my town Damietta in particular, is mainly directed towards helping students to pass their final exams. Unfortunately, most teachers do not adopt a long -term approach that guarantees that their students will be able to use English outside the classroom. So students only concentrate on one skill which is writing. Thus their listening and speaking skills are disabled. What is important to them is to pass the exam which is primarily based on writing .Teachers are not only concentrated with providing their students with questions that are similar to those of the final exam, particularly General Secondary Education Certificate (GSEC) Examination, so students spend most of their time answering typical exam questions.
Most students' scores are high; a lot of students get full marks. However, few students are able to communicate in English because their role plays. As a result, a lot of students complain that they are unable to understand and talk fluently with native speakers of English.
To enable students to communicate freely and spontaneously(自然地) in English, I bring features of real communication into language practice, I always ask students about their own experiences, and suggest groups of students practice what they have learned outside the classroom. This helps lower-achieving students absorb language. Furthermore, role play is a very effective way to improve speaking skills particularly if it is connected to the experience of the students.Who probably write this passage?
A.a teacher | B.a governor | C.a student | D.a reporter |
In Egypt, the students only concentrate on ------
A.listening skill | B.speaking skill | C.reading skill | D.writing skill |
The teachers question their students based on -------
A.what they learn in the class |
B.What their parents expect |
C.The questions that are similar to those of GSEC |
D.The ability that will be used outside the classroom |
Which of the following statements is true according to the passage?
A.Most of the students can't get high marks but can communicate with the native speakers of English. |
B. Communicating skill is more important than writing skill. |
C.Role play connected to the speaker's experience is more effective in improving his skill. |
D.The lower--achieving students can do better in speaking skill than the upper achieving students. |
Who will responsible for the gap between school English and real English?
A.Their parents | B.The students | C.The school | D.The education sys tem |
One day, while a woodcutter was cutting a branch of a tree above a river. When he began crying, God appeared and asked him, "Why are you crying?"
The woodcutter told him that he had dropped his axe into water. God went down into the water and reappeared with a golden axe.
"Is this your axe?" God asked.
The woodcutter said "No."
God again went down and came up with a silver axe." Is this your axe?" God asked.
The woodcutter said "No."
God again went down and came up with a iron axe." Is this your axe?" God asked.
The woodcutter said "Yes."
God was pleased with the man's honesty and gave him all the three axes.
The woodcutter went home happily. One day while he was walking with his wife along the river, his wife fell into the river. W hen he began crying, God appeared and asked him, "Why are you crying?"
"My wife has fallen into water."
God went down into the water and came up with Jennifer Lopez.
"Is this your wife?" God asked him.
"Yes." he said.
God was furious(狂怒的),"YOU CHEAT !Now I am going to curse you."
The woodcutter quickly said, “Forgive me my lord. It is a misunderstanding. IF I say 'No' to Jennifer Lopez, you will come up with Catherine Zeta Jones, If I also say 'No' to her, you will finally come up
With my wife and I will say, 'Yes.' Then you will give all the three to me .I am a poor man .I will not be able to look after all the three. So that's why I've to say 'Yes' "Which of the following best describes the author's tone in telling the story?
A.Optimistic | B.Humoristic | C.Objective | D.Critical |
The impression that the woodcutter makes on you is that he is -----
A.foolish but honest | B.foolish and honest |
C.smart but honest | D.smart and honest |
What can you infer about Jennifer Lopez and Catherine Zeta Jones?
A.They are the secret lovers of the woodcutter |
B.They look much like the woodcutter's wife. |
C.They are both rich women with a lot of gold and silver. |
D.They are both popular with women, much worthy than his wife |
阅读下面短文并回答问题,然后将答案写到答题卡相应的位置上(请注意问题后的词数要求)。
[1]Our vocation holiday is coming. What’s your plan? Staying at home or going for an outing. My plan is going out of town with my family, for we need recreation! Recreation is the spending of time in pleasurable activities. Engaging ourselves in activities that invite happiness and peace of mind is nothing but recreation. In the fast life of today, recreation is an opportunity to take a break, the much – needed break form work.
2Recreation can berest, entertainment or adventure. There are two types of recreation. Active recreation is about engaging in adventure sports or outdoor games while passive recreation involves activities such as taking a walk on the riverside, walking on the beach, wandering in parks or taking nature walks. Both kinds of recreation have their own advantages.
With the increasing pace of life, recreation is getting more and more important. Participate in some regular physical activity, play a sport or exercise. These recreational activities have great mental effects on people. Students have made the fact evident that participation in adventure activities has a positive affect on life. Adventure motivates you, strengthens your confidence and develops self-awareness, such as hiking, cycling, fishing and outdoor games. These activities make you feel fresh and relaxed. Sports make you feel challenged, encourage you to take risks, exhibit your skills, thus building self-confidence.
Activities of recreation result in the improvement for your interpersonal skills. Recreation gives you an opportunity to meet new people and develop new friendships, It is largely believed that participating in recreational activities helps strengthen family relationships.
Recreational activities are popular across the globe. Some enjoy touring to beautiful places around the world while others take interest in pursuing their hobbies as a means of recreation. Be it of any sort, recreation needs to be made an important part of the fast life the present times!How many kinds of recreation are there in the text? What are they?(no more than 6 words)
What’s the main idea of Paragraph 3? (no more than 10 words)
Fill in the blank in Paragraph 2 with proper words.
What effects do activities of recreation have?(no more than 9 words)
Why do you become confident in yourself while having sports?(no more than 20 words)