CRecently scientists have worked out a way to judge roughly where a person has lived using strands(缕) of hair, a technique that could help track the movements of criminal suspects or unidentified bodi 题目和参考答案——青夏教育精英家教网—

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C
Recently scientists have worked out a way to judge roughly where a person has lived using strands(缕) of hair, a technique that could help track the movements of criminal suspects or unidentified bodies .
The method depends on measuring how chemical variations in drinking water show up in people’s hair.
While U.S diet is relatively identical, water supplies vary. The differences result from weather patterns. The chemical composition of rainfall changes slightly as clouds move.
Most hydrogen and oxygen atoms in water are stable , but traces of both elements are also present as heavier isotopes (同位素) . The heaviest raid（列阵）falls first. As a result, storms that form over the Pacific deliver heavier water to California than to Utah.
Similar patterns exist throughout the U.S. By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can establish a geographic timeline. Each inch of hair corresponds to about two months.
Cerling’s team collected tap water samples from 600 cities and constructed a frame of the regional differences. They checked the accuracy of the map by testing 200 hair samples collected from 65 barber shops. They were able to accurately place the hair samples in broad regions roughly corresponding to the movement of raid systems.
“It’s not good for pinpointing (精确定位),” he said. “It’s good for ruling out many possibilities.”
64. What can we learn from the passage about the latest discovery?
A. One’s hair growth has to do with the amount of water they drink.
B. A person’s hair may reveal where they have lived.
C. Hair analysis identifies criminal suspects accurately.
D. The chemical composition of hair varies from person to person.
65. What does the underlined word “identical” in paragraph 3 probably mean?
A. similar B. fantastic C. beneficial D. healthy
66. What is the practical value of Cerling’s research?
A. It helps analyze the quality of water in different regions.
B. It helps the police determine where a crime is committed.
C. It helps the police narrow down possibilities in detective work.
D. It helps identify the drinking habits of the person under investigation.

64-66 BAC

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C
Recently, a survey was done among 288,000 students, which shows that today’s traditional-age college freshmen are “more materialistic and less altruistic (利他主义的)” than at any time in the 19 years of the poll (民意调查).
Not surprisingly, in these hard times, the students’ major purpose “is to be financially well off. Developing a meaningful philosophy of life is less important than ever.” It follows then that today the most popular course is not literature or history but accounting.
Interest in teaching, social service and the “altruistic” fields is at a low. On the other hand, enrollment in business programs, engineering and computer science is way up.
That’s no surprise either. A friend of mine (a sales representative for a chemical company) was making twice the salary of her college instructors in her first year on the job---even before she completed her two-year associate degree.
Though it’s true that we all need a career, it is equally true that our civilization has accumulated an incredible amount of knowledge in fields far beyond our own and that it will be better for our understanding of these other contributions—either scientific or artistic.
Similarly, it is true that, in studying the diverse wisdom of others, we learn how to think. More importantly, perhaps, education teaches us to see the connections between things, as well as to see beyond our immediate needs.
Weekly we read of unions who went on strike for higher wages, only to drive their employer out of business. No company; No job. How shortsighted in the long run!
But the most important argument for a broad education is that in studying the accumulated wisdom of the ages, we improve our moral sense. I saw a cartoon recently which shows a group of businessmen looking puzzled as they sit around a conference table; one of them is talking on the intercom (对讲机) : “Miss Baxter,” he says, “could you please send in someone who can distinguish right from wrong?”
From the long-term point of view, that’s what education really ought to be about.
51. According to the result of the survey, college students _______________.
A. take developing a meaningful philosophy of life more seriously
B. have a wide range of knowledge in many aspects
C. pay more attention to the study of literature
D. have never been so materialistic as today
52. The students’ criteria (标准) for choosing their majors today are largely based on _________.
A. their own understanding of the courses
B. the financial goals they seek in life
C. the influence of their instructors
D. the vast potential for the future educational development
53. What does the fifth paragraph imply?
A. Knowledge in other fields has nothing to do with one’s career.
B. Business management should be included in educational programs
C. The importance of a broad education should not be ignored
D. A good understanding of the civilization will make students rich.
54. The author’s attitude to the effect of studying the diverse wisdom of others is ______________.
A. positive B. indifferent C. doubtful D. negative
55. The writer wrote the passage in order to indicate that ______________.
A. college students today are not a diligent generation
B. people engaged in technical jobs lead a more meaningful life
C. career seekers shouldn’t focus on immediate interests only
D. working experience outside college counts a lot to one’s future career

C
Recently the World Health Organization announced that the disease of
smallpox（天花）had almost been wiped out in most parts of the world, thanks to widespread vaccination（种牛痘）. Most people are vaccinated at least once in their lives and if they wish to travel from one country to another they must be able to prove that they have had a recent vaccination. In this way the disease has been prevented from spreading and today one seldom hears of it at all.
This is mainly because of the great discovery made by a village doctor, Edward
Jenner, in about 1798 when he published his report of his new experiment called vaccination (from the word ‘vacca’ meaning a cow). Jenner discovered that people who worked with cattle often suffered from a harmless disease which they caught from the cattle, but these people never seemed to get smallpox. So he experimented by putting the disease into a small opening on the arms of healthy people, and though their arms became painful for a day or two, they soon recovered and none of these people ever got smallpox.
So the news of the wonderful discovery spread to other countries and people
rushed to their doctors to be vaccinated. In many countries the simple way to deal with the arm was done on thousands of people, and the terrible smallpox began to disappear.
71．Vaccination against smallpox has been so successful that _________ .
A．the discoverer made a large amount of money
B．Dr Jenner was given a prize by the World Health Organization
C．smallpox has almost disappeared in most countries
D．smallpox was no longer in existence on earth
72 ．Smallpox has been prevented from spreading through the following measures EXCEPT that ________.
A．most people were vaccinated against the disease at least once
B．people going abroad should promise not to spread the disease
C．people travelling from one country to another must prove they are vaccinated
D．people must be vaccinated shortly before going to foreign countries
73 ．What led Dr Jenner to experiment with vaccination was that ________ .　
A．he wanted to make a great discovery and publish it
B．vaccination could make people's arms safe
C．he tried to cure the farmers of some disease caught from the cattle
D．those who worked with cattle seemed free from getting smallpox
74．The doctor's new discovery was called ‘vaccination’ for the reason that ________ .
A．he discovered smallpox near a farm
B．he experimented with a disease from the cattle
C．he was working with cattle in the countryside
D．people got the disease of smallpox from the cattle
75．The news of the discovery ________.
A．caught people's attention from all corners of the world
B．spread far and near in the western countries
C．made people rush to Dr Jenner for vaccination
D．helped to get rid of the terrible disease of smallpox

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