CIt happened one morning 20 years ago. A British scientist Alec Jeffrey came acr

题型：不详难度：来源：

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 th

e 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

答案

62—65 DCDD

解析

略

举一反三

B
Events such as hurricanes, earthquakes, floods, volcanic eruptions, and tornadoes are all natural disasters. They are mostly related to the weather. Some are predictable ----like a hurricane. Some, like an earthquake, surprise us. It is necessary for us to learn about them, so we can be prepared!
Flooding happens during heavy rains, when rivers overflow, when ocean waves come onshore, when snow melts too fast or when dams or banks break. Flooding is the most common of all natural disasters.
Hurricanes are severe tropical storms that form in the southern Atlantic Ocean, Caribbean Sea, Gulf of Mexico, and in the Pacific Ocean. Hurricanes gather heat and energy through contact with warm ocean waters. Evaporation(蒸发) from the sea water increases their power.
Hurricanes have winds at least 74 miles per hour. When they come onto land, the heavy rain, strong winds and heavy waves can damage buildings, trees and cars.
Tornadoes are nature’s most violent storms. Tornadoes must always be taken seriously. Tornadoes can be very dangerous ---- sometimes even deadly. They come from powerful thunderstorms and appear as moving. Tornado winds can reach 300 miles per hour. They cause damage when they land the ground. They can damage an area one mile wide and 50 miles long.
While thunder won"t hurt you ----lightning will! So it"s important to pay attention when you hear thunder. Thunderstorms happen mostly in summer and every thunderstorm has lightning. Lightning can strike people and buildings, which is very dangerous.
Thunderstorms affect small areas when compared with hurricanes and winter storms. The typical thunderstorm is 15 miles in diameter and lasts an average of 30 minutes.
A volcano is a mountain with a large opening at the top through which melting rock, steam, gases escape from time to time with violent force from inside the earth. When pressure increases, eruptions occur. Gases and rock shoot up through the opening fill the air with small pieces. Erupt

ions can cause lava flows, hot ash flows, mudslides, falling ash and floods, which is likely to knock down entire forests, cause floods and earthquakes. Fresh volcanic ash can cause damage to the lungs of older people, babies and people with respiratory problems.
64. From the passage, we know that ______.
A. all natural disasters can be predicted
B. all natural disasters are connected with the weather.
C. human beings can do nothing with natural disasters
D. the more we know about natural disasters, the less we will suffer.
65. Which of the following is NOT true according to the passage?
A. Flooding is the most common natural disaster.
B. Hurricanes and tornadoes can land the ground and cause damage.
C. Thunder can strike people and buildings.
D. Fresh volcanic ash can cause illnesses.

题型：不详难度：| 查看答案

Polly Townsend
PART THREE READING COMPREHENSION
Directions: Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are 4 choices marked A,B,C and D. Choose the one that fits best according to the information given in the passage. (20%)
A
“Mummy, I don’t know what to play with. ” Steve interrupts his mother, who is talking to a friend, for the fourth time. “You’ve got a room full of toys!” his mother says, impatiently, In fact it is the jumble of toys which is to blame for four -year-old Steve"s lack of interest in his dolls, cars and stuffed （packed）animals. Each morning he tips out three washing baskets of toys all over his floor, listlessly pulls out something and shortly after is standing at his mother’s desk or following her into the kitchen saying: “Mummy, I am bored.”
A family therapist（治疗专家）explains why children lose interest when they have a whole “toy shop” at home : “According to their brain development, little children are not in a position to judge the quality of a variety of things at once. There is always just one favorite toy for the moment. All the rest is left lying about.” What can parents do to stop their children from being oversupplied with toys? Under no conditions simply make something disappear without the child’s knowledge. If he/she takes no more notice of a toy, a parent can ask if it can be stored or given away. Be warned though the child will help. Lyn is the mother of four-year-old Jessie, and holds the toys and books that are the current（at present）favorites. When it seems to her that her daughter is tired from a cupboard in another room. The box of “old” toys goes into the cupboard. When her

child says she is “bored”, they also get something from her cupboard—it may be something she has had for some time but because she hasn’t seen it for a while it is almost like a new toy.
　　Some favorite toys stay out all the time, and there is collection of dolls which sits in the comer, but in this way Lyn has found that she has fewer toys to put away at the end of the day and her daughter always has something “fresh” to play with.
66. Steve interrupted his mother several times because________.
　　A. he felt uninterested in his toys 　 B. he disliked his mother’s guest
　　C. he didn"t have enough toys to play with　 D. he hoped his mother would play with him
67. According to the therapist, children often complain that they have nothing, to play with because________.
　　A. they can’t play alone for a long time
　　B. they are too young to play with so many toys
　　C. they are too lazy to pick out their favorites
　　D. the

y lack the ability to value too many things at a time
68. Which of the following can be used in place of the underlined word “jumble ”？
　　A. Simple choice.                   　      B. Mixture in disorder.
　　C. Ordinary appearance.　                   D. Same shape.
69. Which is the advice given to parents in the text?________.
　　A. Buy fewer toys for their children  　
B. Form good habits for their children
　　C. Spare some time to play with their children
D.Put some toys away without telling their children

题型：不详难度：| 查看答案

B
As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things.
Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight, Very often the effects of pollution are not noticed for many months or years because the first organisms（生物体）to be affected are either plants or plankton(浮游生物). But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it’s not until dead fish and water birds are seen at the river’s edge or on the seashore that people realize what is happening.
　　Where do the substances which pollute the water come from? There are two main sources of sewage（下水道污物）and industrial waste. As more detergent（洗涤剂）is used in the home, so more of it is finally put into our rivers, lakes and seas. Detergents harm water birds, dissolving the natural substances which keep their feathers water-proof (防水). Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful as there are many highly poisonous things in it, such as copper and lead.
　　So, if we want to stop this pollution, the answer is simple: sewage and industrial waste must be made clear before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.
70. Pollution of water is noticed________.
　　A. when the first organisms are affected　
B. when a good many fish and birds die
　　C. when poisonous things are poured into water　
D. as soon as the balance of nature is destroyed
71.The living things die because there is no ________in the lake or river.
　　A. water　　　　　            B. fish           　 C. poison　　　　　 D. oxygen
72. Which of the following is harmful according to the passage?
　　A. Organisms              　B. Plants and plankton in the water
　　C. Waste water from cleaning    D. Industrial waste made clear before flowing into the water
73. The way to stop water pollution is to________.
　　A. realize the serious situation clearly
　　B. put oxygen into the river
　　C. make the waste material harmless before flowing into the water
　　D. make special room in the sea for our rubbish

题型：不详难度：| 查看答案

D
Can trees talk? Yes --- but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First a willow tree (柳树) attacked in the woods by caterpillars (毛毛虫) changed the chemistry of its leaves and made them tasteless so that the caterpillars got tired of the leaves and stopped eating them. The even more astonishing, the tree sent out a special vapor--- a signal causing its neighbors to change the chemistry of their own leaves and make themselves taste also terrible.
Communication, of course, doesn’t need to be always in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So shy shouldn’t trees have ways of sending messages?
71.When attacked, a willow tree will protect itself by _______.
A. changing its leaves’ chemistry         B. changing its leaves’ color
C. talking to caterpillars                      D. sending a special vapor
72. From the passage we know that caterpillars _______.
A. like willow trees                            B. enjoy eating fallen leaves
C. feed on willow tree leaves     D. could communicate with willow trees
73.Caterpillars will stop eating willow tree leaves which _______
A . have a chemical change and become tasteless   B. have a pleasant taste
C. are being attacked                                      D. are communicating
74.According to the passage, how do willow trees communicate with each other?
A. They talk in words.                               B. They send a special vapor.
C. They wave their leaves.                          D. They make special sounds.
75.According to the passage, bees communicate with each other by _______.
A. talking                     B. making unusual sounds
C. singing                     D. flying in certain patterns

题型：不详难度：| 查看答案

第三部分阅读理解（共20小题；每小题2分，满分40分）
A
Experts around Europe are discussing the embarrassing museum safety following the theft of two art masterpiece paintings on Sunday. A large hunt got under way Monday for thieves who walked into a lightly guarded museum in Oslo, Norway, tore two paintings off the wall and ran away.
Some expressed fear that works of art are in increasing danger from violent robbery — unless, said Deputy Culture Minister Yngve Slettholm, "we lock them in a mountain bunker(碉堡)."
Armed, masked robbers stole the Edvard Munch masterpiece "The Scream" and another of Munch"s works, "Madonna," from Oslo"s Munch Museum on Sunday as visitors watched in disbelief.
The purpose behind the robbery also remained unknown. But art experts guessed the thieves were either looking for money or wished to impress other criminals since it would be nearly impossible to sell such famous pieces of art.
This is the second time in a decade that a version of the painting has been stolen. Another version of "The Scream" was stolen from Oslo"s National Gallery in February 2004, but recovered three months later. The Munch works were not insured against theft, because it was impossible to set a price on them, said John Oeyaas, managing director of Oslo Forsikring, the city-owned company that insured the paintings against damage. But he said the theft in broad daylight from one of Norway"s most visited museums raises the question of security — "How can we make these artworks available to the public while still ensuring their safety?"
56. The stolen paintings were drawn by ______.
A. Oslo Forsikring B. Yngve Slettholm C. Edvard Munch D. John Oeyaas
57.Which of the following description is correct about the theft?
A.The two paintings were stolen on Monday
B.Visitors to the museum saw the faces of the robbers
C.The thieves were looking for money
D.The thieves had weapons with them during the theft
58. The Oslo’s Munch Museum ______.
A.is one of the most popular museum in the country
B.had all its paintings insured against theft
C.were going to lock the paintings in a mountain bunker
D.had another version of “The Scream” stolen in 2004
59. What could be the best title for this passage?
A.Dangers of Violent Robbery
B.How to Ensure Safety of Artworks
C.Priceless Art Lost in Bold Theft
D.Famous Art Works Favored by Thieves

题型：不详难度：| 查看答案