(C)
Scientists have devised(发明) a way to determine roughly where a person has lived using a strand of hair, a technique that could help track the movements of criminal suspects or unidentified murder victims.
The method relies on measuring how chemical variations in drinking water show up in people’s hair.
“You’re what you eat and drink, and that’s recorded in your hair,” said Thure Cerling, a geologist at the University of Utah.
While U.S. diet is relatively identical(同一的), water supplies vary. The differences result from weather patterns. The chemical composition of rainfall changes slightly as rain clouds move.
Most hydrogen and oxygen atoms in water are stable, but traces of both elements are also
present as heavier isotopes. The heaviest rain 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(同位素) along a strand of hair, scientists can construct a geographic timeline. Each inch of hair corresponds(相当) to about two months.
Cerling’s team collected tap water samples from 600 cities and constructed a map 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 rain systems.
“It’s not good for pinpointing(精确),” Cerling said. “It’s good for eliminating many possibilities.”
Told Park, a local detective, said the method has helped him learn more about an unidentified woman whose skeleton was found near Great Salt Lake.
The woman was 5 feet tall. Police recovered 26 bones, a T-shirt and several strands of hair.
When Park heard about the research, he gave the hair samples to the researchers. Chemical testing showed that over the two years before her death, she moved about every two months.
She stayed in the Northwest, although the test could not be more specific than somewhere between eastern Oregon and western Wyoming.
“It’s still a substantial area,” Park said, “But it narrows it way down for me”.
72. What is the scientists’ new 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 accurately identifies criminal suspects.
D. The chemical composition of hair varies from person to person.
73. What does the author mean by “You’re what you eat and drink” (Line 1, Para.3)?
A. Food and drink affect one’s personality development.
B. Food and drink preferences vary with individuals.
C. Food and drink leave traces in one’s body tissues(组织).
D. Food and drink are similar to one’s existence.
74. What did Cerling’s team produce in their research?
A. A map showing the regional differences of tap water.
B. A collection of hair samples from various barber shops.
C. A method to measure the amount of water in human hair.
D. A chart illustrating the movement of the rain system.
75. 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.
Section C
Directions: Read the following text and choose the most suitable heading from A – F for each paragraph. There is one extra heading which you do not need.
|
A．Major findings of
the study B．Stress matters． C．Interpersonal relationships and stress． D．The sense of humor and stress． E．Choosing subjects to study． F．Other characteristics typical of super．young people |
How They Stay Young
76.________________
When Dr David Weeks，a clinical neuro-psychologist at the Royal Edinburgh Hospital in Scotland．wanted to look into the secrets of eternal(永久的) youth ，he advertised for subjects who looked younger than their age．An independent panel examined photographs of respondents，and selected 3,500 people who looked on average l2 to 14 years younger than their actual age to take part in the study．
77．________________
These subjects were studied for eight years．The main aim of the study was to discover whether environment or heredity had more effect on the ageing process．The conclusion was that genetic programming is the main factor．But the study also showed that avoiding stress can slow down the ageing process．
78．________________
Stress seems to have an immediate effect on appearance．A separate study of middle-aged women showed that women suffering form serious stress looked older in just a few months．Yet when the problem causing the stress was removed，they very quickly looked younger．
79．________________
Here is a list of the factors that Dr．Weeks found that allowed his subjects to lead less stressful lives than others．First，they tend to have happy relationships with their partners．These relationships are based on trust and empathy，and provide security and comfort when dealing with stressful problems．Secondly，they tended to avoid sources of hostility instead of allowing them to make them angry．
80．________________
Next, they seem to have a good sense of humor．They like to have fun，and are enthusiastically involved in a variety of hobbies．They also seemed less willing to conform to others’ ideas．They prefer to think for themselves．They tend to have a good attitude towards health and exercise as well．They avoid the sun，do not smoke, and eat a healthy diet．
So these are the secrets of the “ super-young”：a loving relationship．Regular exercise．a variety of hobbies，a healthy diet and avoidance of stress．
Section D
Directions: Read the passage and answer the questions or complete the statements in the fewest possible words.
It's logical to suppose that things like good labor relations, good working conditions, good wages and benefits and job security motivate workers, but one expert, Fredrick Herzberg argued that such conditions do not motivate workers. They are merely satisfiers. Motivators, in contrast, include things such as having a challenging and interesting job, recognition and responsibility. However, even with the development of computers and robotics, there're always plenty of boring, repetitive and mechanical jobs and lots of unskilled people who have to do them. So how do managers motivate people in such jobs? One solution is to give them some responsibilities, not as individuals, but as a part of a team. For example, some supermarkets can buy office stuff to people who fill the shelves, and the people who work at the check out into a team, and let them decide what product lines to stock, how to display them and so on. Many people now talk about the importance of a company's shared values or culture with which all the staff can identify, for example, being the best hotel chain, or making the best, the most user-friendly or the most reliable products in a particular field. Such values are more likely to motivate workers than financial targets which automatically only concern a few people. Unfortunately, there are only a limited number of such goals to go around and by definition, not all the competing companies in that industry can seriously plan to be the best.
(Note: Answer the questions or complete the statements in NO MORE THAN 8 WORDS.)
81: What can actually motivate workers according to Fredrick Herzberg?
__________________________________________________________
82: What does the speaker say about jobs in the computer era?
__________________________________________________________
83: What do some supermarkets do to motivate their employees?
__________________________________________________________
84: Why does the speaker say financial targets are less likely to motivate workers?
__________________________________________________________
第II卷 (共45分)