题目
题型：陕西省模拟题难度：来源：
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, 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 (同位素). 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 along a strand of hair, scientists can construct 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 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(精确定位)," Cerling said. "It"s good for eliminating many possibilities."
Todd 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."
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.
B.Food and drink preferences vary with individuals.
C.Food and drink leave traces in one"s body tissues.
D.Food and drink are essential to one"s existence.
B.The water it delivers becomes lighter when it moves inland.
C.Its chemical composition is less stable than in other areas.
D.It gathers more light isotopes as it moves eastward.
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
答案
核心考点
试题【阅读理解。 Scientists have devised a way to determine roughly where a person has】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
30 minutes of walking three days per week was enough to drive down blood pressure and improve
overall fitness in a group of healthy sedentary (久坐的) adults.
For optimum(最佳的)health, adults are currently recommended to engage in 30 minutes of moderate(适度的)exercise for at least five days of the week. But few people achieve this level of weekly activity,
often citing lack of time as the reason.
Dr. Mark A. Tully, of the University of Ulster, Northern Ireland, and his colleagues designed a study
to see if exercising at a level lower than currently recommended would improve overall fitness and heart
health.
A total of 106 healthy but sedentary adults between the ages of 40 and 61 participated in the
12week study. The subjects were randomly (随机地) assigned a 30minute walk 3 days per week
(44 subjects) or a 3minute walk 5 days per week (42 subjects), while the remainder did not change
their lifestyle(the nonwalking control group).
After 12 weeks, Tully’s team found that blood pressure fell and waistlines and hiplines (臀围)
reduced in size significantly in both the 3day walkers and 5day walkers. Overall fitness also increased in
both walking groups. In contrast, no changes occurred in the nonwalking control group.
The experts noted that the degree of positive change in blood pressure and waist and hip size seen in
the 3day and 5day walkers is enough to make a difference to an individual’s risk of heart disease.
"These results may encourage people who feel they do not have time to exercise for 5 days each
week to consider finding time to do a lower weekly target of exercise," Tully and his colleagues
concluded.
B. To encourage people to do as much exercise as possible.
C. To remind sedentary adults to do some exercise.
D. To tell people how to improve overall fitness.
B. They will be too tired.
C. They will have heart attacks.
D. The level of the exercise is too high for them.
B. The participants are all over 40 years old.
C. The participants do a 30minute walk 3 days a week and a 3minute walk 5 days a week in every
two weeks.
D. Both the 3day walkers and 5day walkers improved their health conditions.
B. Even a low level of exercise in a week can improve one"s heart health.
C. Walking can improve one"s heart health.
D. Walking can make a difference to people’s heart.
which was good enough for our grandparents. The theories of modern psychology have stepped into
argue that we must understand the need of children. Children are not just small adults; they are children
who must be respected as much.
Well, you may say, this is as it should be, a good idea. But think further. What happens?
"Education" becomes the responsibility not of teachers, but of psychologists. What happens then?
Teachers worry too much about the psychological implications of their lessons, and forget about the
subjects themselves. If a child dislikes a lesson, the teacher feels that it is his fault, not the child"s. So
teachers worry whether history is "relevant" to modern young children. And do they dare to recount
stories about violence? Or will this make the children themselves violent? Can they tell their classes about
children of different races, or will this encourage racial hatred? Why teach children to write grammatical
sentences? Verbal expression is better. Sums? Arithmetic? No. Reallife mathematical situations are more
understandable.
You see, you can go too far. Influenced by educational theorists, who have nothing better to do
than to write books about their ideas, teachers leave their teachertraining colleges filled with grand,
psychological ideas about children and their needs. They make elaborate (精致的), sophisticated (复
杂的) preparations and try out their "modern methods" on the longsuffering children. Since one "modern
method" rapidly replaces another the poor kids will have had a good bellyful by the time they leave
school. Frequently the modern methods are so sophisticated that they fail to be understood by the
teachers, let alone the children; even more often, the relaxed discipline, so essential for the "informal"
feelings the class must have, prevents all but a handful of children from learning anything.
1. People do not dare to defend the old system mainly because under the old system ________.
A. too much grammar was taught to children
B. children were spoiled
C. children were treated as grownups
D. children were made to learn passively
2. What view do the modern psychologists hold?
A. Children must be understood and respected.
B. Children are small adults and know what they need.
C. Children are better off without learning lessons.
D. Education of children is the responsibility of psychologists.
3. What happens when teachers pay too much attention to the psychology of their lessons?
A. They find that the children dislike the lessons.
B. They tend to blame students for their failure.
C. They do not pay enough attention to the actual lessons.
D. They no longer want to teach children history.
4. Grammatical sentences are regarded as unimportant because ________.
A. it is better to use verbs only
B. words are said out of natural feelings only
C. talking freely and naturally without sentences is a better form of expression
D. it is felt that formal grammar rules might cause unnatural expressions
But they forget that times have changed a great deal, and they never honestly change places with a
child. Think of the years at __1__: the year spent living in __2__ fear of examinations and school reports.
Every movement you made was __3__ by some adults. Think of the __4__ when you had to go to bed
early, you had to eat __5__ things that were supposed to be good for you. Remember how "gentle"
__6__ was given to you with words like"If you don"t do what I say, I will…". I"m sure you will __7__
forget!
__8__, these are only part of children"s trouble. No matter how kind and loving parents may be,
children often __9__ from some terrible and illogical fears since they can"t understand the world around
them. They often have such 10 in the dark or in the dream. 11 can share their fears with other
adults while children have to face their fears 12 .
But the most 13 part of childhood is the period when you begin to go out of it, the period when
you go into 14 . Teenagers start to be 15 their parents and this causes them great unhappiness. There
is a complete 16 of selfconfidence during this time. Adolescents pay much attention to their appearance and the 17 they make on others. They feel shy, awkward and clumsy(笨拙的). 18 are strong but
hearts are easily broken. Teenagers 19 moments of great happiness or black despair, 20 through
this period, adults seem to be more unkind than ever.
| ( )1. A. home ( )2. A. content ( )3. A. observed ( )4. A. pleasure ( )5. A. delicious ( )6. A. pressure ( )7. A. ever ( )8. A. Thus ( )9. A. suffer ( )10. A. views ( )11. A. Children ( )12. A. regularly ( )13. A. painful ( )14. A. adulthood ( )15. A. in ( )16. A. need ( )17. A. expression ( )18. A. Bones ( )19. A. ensure ( )20. A. and | B. school B. forgetful B. disturbed B. goods B. nutritious B. care B. never B. As a result B. free B. fears B. Experts B. alone B. reliable B. adolescence B. through B. short B. explanation B. Feelings B. indicate B. but | C. table C. absurd C. stopped C. time C. tasty C. issue C. still C. Even so C. die C. regrets C. Adults C. doubtfully C. inspiring C. youth C. for C. lack C. possession C. Wills C. experience C. even | D. hand D. constant D. appreciated D. fun D. hateful D. exploration D. somewhat D. Above all D. differ D. spirits D. Teenagers D. comfortably D. imaginary D. period D. against D. abundance D. impression D. Ideas D. comfort D. instead | |
| 阅读理解 | ||||
| Compared with their continental counterparts, children in the UK start school at a very early age. Our correspondent is not convinced that it gives them any academic advantage. My threeyearold son and I went shopping for his school uniform. As he stood in the changing room, swamped by even the smallest trousers, several people commented that he looked too young to start school. I couldn"t agree more. Scarcely will he have blown out the candles on his fourth birthday cake when I"ll be waving him off at the school gates. The poor little man still puts his pants on back to front and thinks baby pigs come out of eggs. How is he going to cope with literacy and numeracy hours, let alone the horrors of school toilets? Yes, I am an overanxious mother but I surely can"t be the only person who feels that British children start school far too young. A research suggests that channelling children into formal learning structures at such a young age breeds a sense of failure and disaffection that will dog them throughout their school career. The law states that the statutory school starting age for children in the UK is the term after a child"s fifth birthday, but it is common practice in England and Wales to admit children to reception class at the beginning of the year in which they become 5, which means that most children start school at the age of 4. The latest government figures indicate that around 80 percent of children enter school before their fifth birthday. By comparison, children in France, Portugal, Belgium start school at 6, while the school starting age in many Scandinavian countries is 7. This is the starting age in Finland, where students recently beat those from 39 other countries to come out tops in maths, science and reading. 1. When her son is going to enter primary school, the writer feels very ________. A. excited B. worried C. surprised D. puzzled 2. In the UK, it is stated in the law that children should start school at the age of ________. A. 4 B. 5 C. 6 D. 7 3. Which of the following is probably the best title of the passage? A. Do our children start school too young? B. Students starting school too young may cause problems C. Young students may lead to failure D. The age of starting school in some countries 4. What worries the writer is that her child ________. A. can"t even look after himself B. can"t dress himself C. has some childish thoughts D. has little ability in writing and reading | ||||
| 完形填空 | ||||
| Displaying charitable behavior can develop your children"s sympathy and desire to give. Sherry, __1__, began doing so when her daughter, Tracy, was 4. She __2__ to Tracy that there were many children whose parents couldn"t afford to buy them toys, and she might want to __3__ the toys, and clothes she was "too big for", and put them in a bag. Tracy was __4__ to do this task, and they drove to a shelter __5__ by a local church. Tracy carried the __6__ in. __7__ Tracy became older, they would carry out this tradition a few times a year. These activities showed Tracy that her mom was involved in helping the poor, but __8__, gave her a chance to become involved. Sometimes, Tracy had a second thought about some toys she had prepared to donate and decided to keep a few of them for herself. This is fine. __9__ children are willing to give up some of their things, they are on the right 10 . Getting your children involved doesn"t 11 much time and effort. Grace and Kal"s children attended a local public 12 that had a shelter. Once a week, both of them brought two 13 of food to school for the shelter. Every member of the 14 worked there a few hours once a month. One evening the family 15 dinner there, and the meal 16 canned peach. Many years has passed and their younger daughter 17 recalls how good it made her feel when she was 4 and saw the 18 eating her peaches. Today, all three kids continue to be active 19 . 20 their parents. | ||||
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