题目列表(包括答案和解析)
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 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.
【小题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.
【小题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 |
| A．Disapproving. | B．Respectful. | C． Admiring. | D．Doubtful. |
According to a report by the China News Weekly, Chinese white collars are becoming fully occupied in the office. They pursue many of their activities in the office building, eating, doing exercise, resting, playing games or even dating.
In large cities such as Shenzhen, Shanghai and Beijing, where economy is developing at a fast speed, office workers face an increasing work pressure day by day and many of them have begun to make office their home.
As the young generation in society, most of them are aged between 25 and 45. In the eyes of outsiders, they enjoy a comfortable life: they lead the fashion trend in the city and earn a high salary; they enjoy a flexible working schedule and a very good working environment; having a good education background, they don’t have to worry that one day they will lose their jobs.
However, only the white collars themselves know what others see as a good life is in fact a boring life. They often work extra hours, suffer from loss of creative ability and have little time to make friends. When they go off from work late at night, somethimes they might think of asking for a leave the next day and having a holiday somewhere. However, when a new day begins, they find everything back to normal and themselves pushed by new tasks.
In fact, even if they don’t work extra hours in the office, they have no place to go. Many of the young people are fresh from college, or have come to work in large cities from their hometowns. As newcomers, they haven’t established （建立）a social network. They have few friends to go dating. Meanwhile, many of them face a great pressure for earning money to buy a house or a car. If they cannot afford to buy these, they still have to work to pay for high apartment rents and communication fares.
The underlined sentence probably means _______
A. Chinese white collars are not allowed to get out of the office
B. The office is crowded with Chinese white collars
C. Chinese white collars make the office filled with odds and ends
D. Chinese white collars spend most of their time in the office
The followings are all reasons why white collars want to have a rest EXCEPT that _______
A. They have to continue to stay at office after work
B. They feel more and more difficult to think up a good idea
C. They have no interest in anything
D. They have little time to make friends
The main idea of the third paragraph is that_______
A. white collars are admired by other people
B. white collars needn’t worry about losing jobs
C. white collars can earn high salary and work freely
D. white collars are in the lead in the way of behaving
From the passage , we can infer that _______
A. white collars are all workaholics who regard the office as home
B. white collars suffer from material and mental pressure in life
C. white collars are the models of young people in society
D. people have a good understanding of what white collars’ life is
Throughout history man has had to accept the fact that all living things must die. But people now live longer than they 36 . Yet, all living things still show the 37 of aging, which will eventually 38 death.
Aging is not a disease, but as a person passes maturity (成熟期), the cells of the body and the 39 they form do not function as well as they 40 in childhood and teenage years. The body provides less 41 against disease and is more 42 to have accident.
A number of related causes may 43 aging. Some cells of the body have a fairly long life, but they are not 44 when they die. As a person ages, 45 of brain cells and muscle cells decreases. 46 body cells die and are replaced by new cells. In an aging person the 47 cells may not be as workable or as capable 48 growth as those of a young person.
Another 49 in aging may be changes within the cells 50 . Some of the protein chemicals in cells are known 51 with age and become less elastic (有弹性的). This is why the skin of old people wrinkles (皱纹) and 52 . This is also the reason why old people 53 in height. There may be other more important chemical changes in the cells. Some complex cell chemicals, such as DNA and RNA, store and 54 information that the cells need． Aging may affect this 55 and change the information-carrying molecules so that they do not transmit the information as well.
36. A．would B．be used to C．used to D． used
37. A．function B．effect C．affect D． sign
38. A．lead in B．give in C．run into D． result in
39. A．hands B．feet C．heart D． organs
40. A．do B．has done C．did D． had done
41. A．energy B．protection C．vigor D． power
42. A．likely B．probable C．possible D． alike
43. A．attend to B．contribute to C．add to D． devote to
44. A．replaced B．reborn C．recovered D． surrendered
45. A．a number B．the amount C．the number D． a great deal
46. A．The others B．The other C．Another D． Other
47. A．old B．left C．new D． other
48. A．to B．for C．of D． in
49. A．factor B．effect C．reason D． element
50. A．for themselves B．of themselves C．themselves D． on their own
51. A．change B．to have changed C．to change D． to be changed
52. A．hangs loose B．hangs loosely C．is hanging loosely D． is hanging loose
53. A．increase B．shrink C．lengthen D． decrease
54. A．pass away B．pass by C．pass off D． pass on
55. A．improvement B．procession C．approach D． process
It is estimated that some seven hundred million people, about half the world’s adult population, are unable to read or write, and there are probably two hundred and fifty million more whose level is so slight that it is hardly called literacy(有文化).
Recently the attack on illiteracy had been stepped up. A world plan has been drawn up by a committee of UNESCO experts in Paris, as part of the United Nations Development Decade（十年计划）,and an international conference of the subject has also been held. UNESCO stresses that functional literacy is the aim. People must learn the basic skills of responsible citizenship, the ability of reading notices, newspapers, timetables, letters, price-lists to keep simple records and accounts, to select the importance of the information gathered, and to fill in the forms.
The major areas of illiteracy are in Asia, Africa, and Central and South America. In Africa there are at least one hundred million illiterate people, which is eighty to eighty-five percent of the total population. In Europe the figure is about twenty-four million; most of them are in Sothern Europe, with Spain, Italy, Portugal, Yugoslavia heading the list (the United Kingdom has about seven hundred thousand).
UNESGO is eager for each country in the world, poor or rich, to wipe out illiteracy.
【小题1】The author implies that this world plan is to______.
| A．be carried out in the major areas of illiteracy like Africa. |
| B．be realized in the years |
| C．be drawn up by Parisian experts |
| D．be discussed at an international conference |
| A．asking African countries to take the lead in attacking illiteracy |
| B．strengthening the function of the UNESCO |
| C．helping illiterate people learn functional reading and writing |
| D．training responsible citizens |
| A．England | B．France | C．Sweden | D．Spain |
| A．The major areas of illiteracy are in Asia, Africa, and Central and South America. |
| B．In the USA there are at least one hundred million illiterate people, |
| C．the United Kingdom has about seven hundred million illiterate people |
| D．In Europe the figure is about twenty-four million; most of them are in Northern Europe. |
Scientists have developed a water treatment system that they say is a powerful but simple way to save lives. Four grams of chemicals can treat ten liters of dirty water for a low cost, about ten cents.
Experts say infections from dirty water kill several thousand children in developing countries every day. The Procter and Gamble company has been developing the "PUR Purifier of Water" system since 1995. The company has been working with the United States Centers for Disease control and Prevention(C.D.C.).
C.D.C. researchers tested it in Guatemala, Pakistan and Kenya. Procter and Gamble researcher Greg Allgood says cases of diarrhea(腹泻) in those studies fell by about 50 percent. Researchers from Johns Hopkins University in Maryland tested the system at a refugee camp in Liberia. Mr. Allgood says that study found a reduction of more than 90 percent. Use of the system is being expanded worldwide.
The treatment contains bleach(漂白剂) to kill disease-causing organisms. It also contains something that dirt and other particles stick to. Mr. Allgood says the chemicals can remove lead and other dangerous metals and even agricultural poisons like D.D.T.
Mr. Allgood heads the Children's Safe Drinking Water program at Procter and Gamble. He says about forty million packets of the treatment have been given to countries for free. They have been used in emergencies and in areas with limited supplies of clean water.
Clean water is a limited resource in many parts of the world. Delegates from about 130 nations attended the Fourth World Water Forum last month in Mexico City. Scientists, policy experts and others discussed ways to provide clean water to the world’s poor. Organizers say more than twenty percent of the world population lacks clean drinking water. The final declaration did not go so far as to declare water a human right. But it did say that governments, not private companies, must take the lead in improving the public’s ability to have clean water.
46. What is mainly talked about in this passage?
A. Water pollution around the world.
B. The causes of diarrhea in African countries.
C. A newly developed water treatment system.
D. The Fourth World Water Forum in Mexico City.
47. Which of the following developed the water treatment system?
A. The US Centers for Disease Control and Prevention.
B. The Procter and Gamble Company and C.D.C.
C. The Children’s Safe Drinking Water Program.
D. Johns Hopkins University.
48. Which of the following about the new water treatment system is NOT true?
A. It is effective but very expensive.
B. It was tested in Guatemala, Pakistan and Kenya.
C. It is being expanded worldwide.
D. It can remove dangerous metals in the water.
49. Which of the following shows that the shortage of clean water is a serious problem?
A. Forty million packets of the treatment have been given to countries for free.
B. Delegates from about 130 nations attended the Fourth World Water Forum.
C. Four grams of chemicals can treat liters of dirty water for a low cost.
D. Infections from dirty water kill several thousand children every day.
50. The best title for this article is ______.
A. A Small Packet of Chemicals, a Big Effect on Dirty Water
B. The Procter and Gamble Company and C.D.C.
C. The Shortage of Clean Water
D. How to Cure Diarrhea
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