CIthappenedonemorning20yearsag

更新 2022-09-03
科目英语
题型阅读理解
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C
It happened one morning 20 years ago. A British scientist Alec Jeffrey came across DNA fingerprinting: He identified the patterns of genetic material that are unique to almost every individual. His discovery changed everything from the way we do criminal investigations to the way we decide family law. But the professor of genetics at the University of Leicester, UK, is still surprised, and a bit worried, by the power of the technology he released upon the world.
The patterns within DNA are unique to each individual, except identical twins, who share the same pattern. The ability to identify these patterns has been used to convict(证明…有罪) murderers and to clear people who are wrongly accused. It is also used to identify the victims of war and settle disputes over who is the father of a child.
Jeffrey said he and his colleagues made the discovery by accident while tracking genetic
variations(变异). But, within six months of the discovery, genetic fingerprinting had been used in an immigration case, to prove that an African boy really was his parents’ son.·In 1986, it was used for the first time in a British criminal case: It cleared one suspect after being accused of two murders and helped convict another man.
DNA testing is now very common. In Britain, a national criminal database established in 1995 now contains 2.5 million DNA samples. The U.S. and Canada are developing similar systems. But there are fears about the stored DNA samples and how they could be used to harm a person’s privacy. That includes a person’s medical history, racial origin or psychological profile. “There is the long-term risk that people can get into these samples and start getting additional information about a person’s paternity(父子关系) or risk of disease,” Jeffrey said.
DNA testing is not an unfailing proof of identity. Still, it is considered a reasonably reliable system for determining the things it is used for. Jeffrey estimates the probability of two individuals’ DNA profiles matching in the most commonly used tests at one in a billion.
62. According to the text, DNA testing can NOT be used in _______ .
A. doing criminal investigations        B. deciding faraily law
C. clearmg wrongly accused people     D. telling twins apart
63. DNA samples are not popular with all the people because _______ .
A. the government in Britain establishes a criminal database
B. the US and Canada develop similar systems
C. DNA samples can be used to harm a person’s privacy
D. DNA testing is too expensive and dangerous now
64. Where will you most probably find this article?
A. In a guidebook.                   B. In a storybook.
C. In a science fiction.               D. In a scientific magazine.
65. Which is the best title for the passage?
A. Discovery of DNA testing by Jeffery B. Practice of DNA testing in court
C. DNA testing in the present situation   D.Benefits and side effects of DNA testing

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C
Cancer researchers urged people on Wednesday to take more vitamin D to lower risk of cancer, saying studies showed a clear link. “Our suggestion is for people to increase their intake (吸入，摄入), through diet or a vitamin supplement,” Dr. Cedric Garland said in a telephone interview.
Garland's research team reviewed 63 studies, including several large long-term ones, on the relationship between vitamin D and certain types of cancer worldwide between 1966 and 2004. “There's nothing that has this ability to prevent cancer,” he said, urging governments and public health officials to do more to fortify (增强) foods with vitamin D. Garland is part of a University of California at San Diego Moores Cancer Center team that published its findings this week online in the American Journal of Public Health. Vitamin D is found in milk, as well as in some fortified orange juice, yogurt and cheeses, usually at around 100 international units（IU）a serving. “People might want to consider a vitamin supplement to raise their intake to 1000 IUs per day” Garland said, adding that it was well within the safety guidelines established by the National Academy of Sciences.
The authors said that taking more vitamin D could be especially important for people living in northern areas, which receive less vitamin D from sunshine.
“African Americans, who don't produce as much of the vitamin because of their skin colour, could also benefit significantly from a higher intake,” the authors said.
66．According to the passage, people are advised to take more Vitamin D, because__.
A. it is nutritious                B. it can‘t harm people’s health
C. it can lower cancer risk         D. it is not taken enough every day
67．Which of the following can not help people get more Vitamin D?
A. Have some sunshine           B. Have more meat
C. Have more fortified cheese      D. Have a vitamin supplement
68．Who can Garland probably be?
A. A health researcher            B. A doctor
C. A scientist                   D. A public health official
69．Which of the following food can lower people‘s chance of getting cancer?
A. Milk                        B. Fortified orange juice
C. Fortified yogurt               D. All of the above
70．People from which area should take more Vitamin D according to the passage?
A. Asian people                 B. African people
C. American people              D. European people

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B
The most important holiday in spring, especially for Christians, is Easter. This Christian holiday is not on the same date every year，but it’s always on a Sunday. It can be any Sunday between March 22 and April 25. Many people celebrate Easter by buying new clothes. Children celebrate by hunting for colored eggs that their parents have hidden around the house. People also give Easter baskets filled with candy and other goodies to one another to celebrate the day.
But the holiday is more than new clothes and good things to eat. On Easter, many people go to church to celebrate Jesus’ resurrection（复活）from the dead. Most people color Ester eggs. Some people hide them. Others just eat them. But no matter what one does with Easter eggs，they are an important Easter tradition throughout the Western world. People from many different cultures celebrate Easter. In both America and Belgium, children look for Easter eggs hidden on lawns and in bushes. In America, children believe the eggs are hidden by the Easter bunny (兔子).But in Belgium, the hidden eggs are supposed to have fallen from church bells. In Bulgaria (保加利亚), red Easter eggs are lucky in churches. Bulgarian families also hit these Easter eggs together to see whose is the strongest. The winner looks forward to good fortune that year. Still dozens of other Easter traditions exist. In parts of Austria，for example，children sing from door to door and are rewarded with colorful eggs.
61．Easter comes _______.
A. on the same date every year
B. on Sunday on March 22
C. on Sunday on April 25
D. on a Sunday between March 22 and April 25
62．To celebrate Easter, people ___________.
A. go shopping, hide colored eggs and children hunt for them
B. give Easter baskets filled candy and goodies to one another
C. buy new clothes, hide colored eggs and children look for them around the house
D. both B and C
63．For Christians the more important thing to do on Easter is________.
A. going to church to celebrate Jesus’ resurrection
B. buying new clothes
C. eating delicious food and paint color eggs
D. exchange beautiful gifts each other
64．People from different cultures have different ideas about Easter egg _________.
A. In both American and Belgium, children hunt for Easter eggs hidden in rooms and in bushes
B. In Belgium, the hidden eggs are thought to have fallen from doorbells
C. In American, children believe the eggs are hidden by the Easter bunny
D. In America, the hidden eggs are supposed to have fallen from doorbells
65．In some places of Austria, children sing from door to door for_______.
A. blesses      B. Easter eggs     C. candy and goodies     D. Easter bunny

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第三部分阅读理解（共20小题；每小题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
Satellites are an important part of our ordinary lives．For example, the information for weather forecasts is sent by satellite．Some satellites have cameras which take photographs of the Earth to show how clouds are moving．Satellites are also used to connect our international phone calls．
Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites．Airplane pilots also sometimes use a satellite to help them find their exact location．
We use satellites to send television pictures from one part of the world to another．They are usually 35，880 kilometers above the equator．Sometimes we can see a satellite in the sky and it seems to stay in the same place．This is because it is moving around the world at 11，000 kilometers an hour—exactly the same speed that the earth rotates．A satellite must orbit the Earth with its antennae(天线)facing the earth．Sometimes, it moves away from its orbit，So there are little rockets on it which are used to put the satellite back in the right position．This usually happens about every five or six days．
Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth．A satellite usually works for about 10-12 years．Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired．Often，very old or broken satellites are left in space to orbit the Earth for a very long time．This is very serious because some satellites use nuclear power and they can crash into each other．
56．Which of the following is NOT done by satellites according to the passage?
A．Sending information for weather forecast．
B．Taking photographs of the Earth．
C．Sending TV pictures．
D．Providing food for airplane pilots．
57．What’s the speed the earth rotates at?
A．35,880 kilometers per hour．    B．335,880 kilometers per hour．
C．11,000 kilometers per hour．     D．110,000 kilometers per hour
58．Why does the satellite move around the world at the same speed as the Earth rotates?
A．In order to take photographs．
B．In order to stay in a certain position in the orbit．
C．In order to move away from its orbit．
D．In order to send television pictures．
59．What does the underlined word “This” in the 3rd paragraph refer to?
A．A satellite．   B．A little rocket．
C．A satellite seems to stay in the same place in the sky．
D．The satellite puts the rockets in the right position．
60．Which is true of satellites?
A．A satellite usually works for about 10-12 years．
B．Every time a satellite gets broken，it is brought back to the Earth to be repaired．
C．A broken satellite is never left in space．
D．They often crash into each other．

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D
Taste is suc．h a subjective matter that we dori't usually conduct preference tests for food． The most you can say about anyone's preference is that it's one person's opinion．But because the two bigcola companies-Coca-Cola and Pepsi Cola-are marketed so aggressively, we've wondered how big arole taste-preference actually plays in brand loyalty．We set up a taste test that challenged people who identified themselves as either Coca-cola or Pepsi fans: Find your brand in a blind tasting．
we inwited staff wolunteers who had a strong liking for either Coca-Cola Classic or Pepsi, Diet Coke．or Diet Pepsi．These were people who thought they'd have no trouble telling their brand from the oLher brancl．
We eventuallv located 19 regular cola drinkers and 27 diet cola drinkers．Then we fed them with four unidentified samples of cola one at a time, regular colas for the one group, diet versions for the other．rOVe asked them to tell us whether each sample wa．s Coke or Pepsi; then we analyzed the records statistically to compare the participants' choices \~-ith what mere guesswork could have accom-plished．
Getting all four samples right was a tough test, biit not too tough, we thought, for people whobelieved they could recognize their brand． In the end, only 7 0ut of 19 regular cola drinkers correct-ly identified their brand of choice in all four trial．s． The diet-cola drinkers did a little worse-only 7 out of 27 identified all four samples correctly．
Both groups did better than chance would predict, but nearly half the participants in each group made the wrong choice two or more times．Two people got all'four samples vrrong． Overall, hal．f theparticipants did about as well on the last round of tasting as on the first, so tiredness, or taste burn-out, was not a factor． Our preference test results suggest that only a few Pepsi participants and Coke fans may really be able to tell their favorite brand by taste and price．
71．According to the passage the preference test was conducted in order to______
A．show that a person's opinion about taste is mere guesswork
B．compare the ability of the participants in choosing their drinks
C．find out the role taste preference plays in a person's drinking
D．reveal which cola is more to the liking of the dr-inkcrs
72．The statistics recorded in the preference tests show that
A．there is not much difference in taste between Coca-Cola and Pepsi
B．few people had trouble telling Coca-Cola from Pepsi
C．people's tastes differ from one another
D．Coca-Cola and Pepsi are people's two most favorite drinks
73．It is implied in the first paragraph that______
A．the competition between the two colas is very strong
B．blind tasting is necessary for identifying fans
C．the purpose of taste test is to promote the sale of colas
D．the improvement of quality is the chief concern of the two cola companies
74．The underlined word "bumout" here refers to the state of          ．
A．being seriously bumt in the skin
B．being badly damaged by fire
C．being unable to bum for lack of fuel
D．being unable to function because of too much use
75．The author's purpose in writing this passage is to           ．
A．emphasize that taste and price are closely related to each other
B．recommend that blind tasting be introduced in the quality control'of colas
C．show that taste preference is highly subjective
D．argue that taste testing is an important marketing strategy

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C
A 17-year-old boy, caught sending text messages in class, was recently sent to the vice principal's office．The vice principal, Steve Gallagher, told the boy he needed to focus on the teach- er, not his cellphone．The boy listened politely and nodded, and that's when Mr．Gallagher noticed the student's fingers moving on his lap．He was texting while being scolded for texting．"It was a subconscious act," says Mr．Gallagher, who took the phone away．"Young people today are con-nected socially from the moment they open their eyes in the moming until they close their eyes at night． It's compulsive．"
A study this year by psychology students at Covenant College in Lookout Mountain, Ga．, found that the more time young people spend on Facebook, the more likely they are to have lower grades and weaker study habits． Heavy Facebook users show signs of being more sociable, but they are alsomore likely to be anxious, hostile or depressed．
Almost a quarter of today's teens check Facebook more than 10 times a day, according to a2009 survey by Common Sense Media, a nonprofit group that monitors media's impact on families．Will these young people get rid of this habit once they enter the work force, or will employers cometo see texting and 'social-network checking' as accepted parts of the workday? Think bac．k．Whentoday's older workers were in their 20s, they might have taken a break on the job to call friends andmake after-work plans．In those earlier eras, companies discouraged non-business-related calls, and someone who made personal calls all day risked being fired． It was impossible to imagine the con-stant back-and-forth texting that defines interactions among young people today．Educators are alsobeing asked by parents, students and educational strategists to reconsider their rules．"In past gen-erations, students got in trouble for passing notes in class．Now students are good at texting withtheir phones stiU in their pockets," says 40-year-old Mr．Gallagher, the vice principal, ”and they're able to communicate with someone one floor down and three rows over．Students are just fun-amentally different today．They will take suspensions rather than give up their phones．"
66．The underlined word“a subconscious act" in the first paragraph refers to an act______
A．on purpose                      B．without realization
C．in secret                       D．with care
67．Young people addicted to the use of Facebook______．
A．are good at dealing with the social relationships and concentrate on their study
B．have high spirits and positive attitudes towards their life and work
C．have been influenced mentally in the aspects of behaviors and habits
D．are always in bad mood and have poor performance in every respect
68．Through the situation of today's older workers in their 20s, it can be inferred that______．
A．the employers will not accept young people's sending text messages
B．a cellphone is a must for today's older workers instead of young people
C．the employers prefer older workers to young people
D．the employers will find it hard to control the interaction among young people
69． Mr． Gallagher reminds us that the students in the past and those today______．
A．like to break rules and have the same means of sending messages
B．are alwa)-s the big problem for the educators and their parents
C．like sending text messages but those today do it in a more secret and skillful way
D．cannot live without a ceUphone
70．What's the best title of the passage?
A．Teenagers and CeLl．phones         B．Teenagers' Texting Addiction
C．Employers and Teenagers              D．Teenagers' Education

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