题目
题型:不详难度:来源:
The death of a star is not a quiet event. First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns.
After the explosion gravity pulls in what’s left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so dense that a teaspoon of matter from it weighs billion of pounds.
The more the star shrinks, the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is unbelievably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born!
That’s what we know about black holes. What we don’t know is this: What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine.
But if the black hole doesn’t keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world. They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a “white hole” in a different universe. As the black hole swallows light, the white hole shines brightly—somewhere else. But where? A different place, perhaps, or a different time — many years in the past or future.
Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed. So far the time being, black hole must remain a mystery.
Black holes are a mystery—but that hasn’t stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth’s energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste—a sort of huge waste disposal(处理) in the sky!
小题1:When the star begins to die ______.
A.there is no fuel left in it | B.its outer layer goes into space first |
C.a huge explosion will happen | D.it doesn’t give off light any longer |
A.The gravity inside the star is very strong. | B.The light can’t go out of the star. |
C.The star becomes smaller and smaller | D.The dying star shines very brightly. |
A.continues becoming smaller and smaller all the time |
B.goes into another universe and becomes a white hole |
C.can pull in everything we know of in the world |
D.will appear at another place at a different time |
A.A New Scientific Discovery: Black Holes |
B.How Do Black Holes Come Into Being? |
C.What Are Black Holes? |
D.Travel Through A Black Hole |
答案
小题1:C
小题2:D
小题3:C
小题4:C
解析
小题1:细节理解题。根据第二段第二句可知。
小题2:细节理解题。D项是黑洞形成前的现象。
小题3:根据倒数第二段“Nothing we know of could go into a black hole without being crushed.”可知。其余三项都是科学家们的猜测。
小题4:主旨大意题。题目的选择应具有高度的概括性、强烈的针对性及一定的醒目性。首先可排除A项,因为黑洞早已不再是新鲜的话题。B、D两项只是短文的两个方面。
核心考点
试题【A black hole is created when a large star burns out. Like our sun, stars are unb】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
Key features
● Recognizes the “global community”(国际社会)
● Has close connections with practical research
● Much of the teaching is done in small discussion groups
About the course
The course gives you chances to know great power polities between nation states. It will provide more space to study particular issues such as relationship among countries in the European Union, third world debt, local and international disagreement, and the work of such international bodies as the United Nations, the European Union, NATO, and the World Bank.
The course puts theories into the working of the international system with close attention to particular countries. You will also have a better knowledge of methods of solving the international problems.
Related(相关的)courses
BA (Hons) Community Management
BA (Hons) Public Policy and Management
Employment possibilities
International organizations
International business
Earth Science (BSc)
Key features
● Based on key courses and the latest research findings
● Pays much attention to practical skills
● Offers chances for fieldwork(实地考察)
About the course
The demand for natural resources is becoming an increasingly serious problem for the future of mankind. Graduates in Earth Science will play an important role in meeting this demand, and in knowing the meaning of using the natural resources.
The course covers geography and geology. You will carry out fieldwork in the UK and possibly overseas, and a research in an area of interest to you in the final year.
Related courses
BSc (Hons) Geograhpy
BSc (Hons) Geology
Employment possibilities
Mineral, oil, water or other related engineering industries
小题1:International Studies is a course in ________.
A.international polities | B.international business |
C.international systems | D.international bodies |
A.become practical and open-minded |
B.have a greater ability to discuss theories |
C.know how to settle international problems |
D.have good jobs in any international organizations |
A.is attractive because of the chances for fieldwork |
B.pays more attention to practical skills than theories |
C.is built on important courses and the results of recent studies |
D.encourages students to play a role in using natural resources |
A.enjoy research work | B.plan to choose courses |
C.study in the UK | D.are interested in overseas fieldwork |
Walk it off
Exercise is the most popular bad-mood buster. A person who’s in a bad mood has low energy and high tension. Taking a fast ten-minute walk, or doing some quick exercises can do wonders towards changing that bad mood.
Tune it out
Listening to your favorite music for a while can also make tension go away quickly, because music starts associations with past positive experiences we’ve had.
Give yourself a pep talk
Stop and listen to what’s on your mind. Bad moods are often started by too many negative thoughts. Write them all down on paper; the pessimistic (悲观的) messages you’ve been giving yourself and then give optimistic answers. ("I still don’t have a job. "vs" I have two interviews next week.")
Reduce your stress
Relaxation techniques are wonderful mood-lifters. These include deep breathing, stretching and visualizing (想象), all of which sound complicated but aren’t. One easy way to visualize: close your eyes and picture a favorite place, such as the beach. Another simple way to against distress is to make a to-do list. One reason for being in a bad mood is feeling you have no options(选择权) By taking control over certain areas, you realize you’re not helpless. You can make changes in your mood and life.
Avoid things that won’t improve your mood
TV may not help much: You need to increase your energy level and stimulate your mind something — that the TV show "Neighbors" won’t do. And before you reach for that piece of cake and coffee, think about how mood and food are linked. Sugar and caffeine contribute to depressed moods. The better choice? Research shows that carbohydrates, such as potatoes and pasta, produce a calming effect in people who have a desire for them.
小题1:We learn from the text that it might help rid us of a bad mood ________.
A.to do nothing about it |
B.to take a long walk on the beach |
C.to do some exercises with light music |
D.to talk it to neighbours |
A.It is not complicated to do so. |
B.It is an area to be easily controlled. |
C.It helps beat a bad mood. |
D.It brings us a new technique. |
A.it sometimes shows what happens around you |
B.it keeps you stay unmoved |
C.it reminds you of eating and drinking |
D.it produces a calming effect |
A.a book on physical exercises | B.a doctor’s handbook |
C.a notice | D.a magazine |
How large an allowance is appropriate? Experts say there is not right amount. Actual amounts differ from region to region, and from family to family.
To set an appropriate allowance for your child, work up a weekly budget. Allow for entertainment expenditures such as movies and snacks. Next, include everyday expenses such as lunch money, bus fare, school supplies. "If you make the child responsible for these ‘ ills’," says Josephine Swanson, a consumer specialist, " he or she will learn to budget for necessary expenditures."
Finally, add some extra money to make saving possible. If you can, keep your child’s allowance in line with that of his friends. A child whose purchasing power falls away below his peers’ can feel left out.
It can be tough, but avoid excusing your children when they make a mistake with their allowance. When Brooke Stephens was ten and growing up in Jacksonville, her mother gave her $5 a week, $1.75 of which was for bus fare and lunch." If you lose your money," Brooke’s mother told her, "you walk home."
One week the girl spent all her allowance in a candy store, then she called home for a ride. " Mom made me walk home," recalls Stephens, now a financial planner in Brooklyn. " At first I was angry. But I finally realized that she was trying to teach me an important lesson. "
Experts advise that an allowance should not be tied directly to a child’s daily chores. Kids should help around the house not because they get paid for it but because they share responsibilities as members of a family. You might, however, pay a child for doing extra jobs at home, which can develop his or her initiative.
小题1: Which of the following is the possible title of the passage?
A.How to develop a child’s initiative. |
B.How to work up an amount of pocket money. |
C.How to teach a child to save money. |
D.How to teach a child about money. |
A.spend all the money very soon |
B.be spoiled and finally ruined |
C.feel responsible and careful about money |
D.lost the money and can not return home |
A.his parents | B.his teachers | C.his financial experts | D.his friends |
A.paying children for their housework is no good |
B.a child’s initiative can be developed if he or she is paid for all the housework |
C.children may feel lost and lonely if they have no pocket money |
D.children may learn to put aside some money if they are given a great amount of pocket money |
The biggest change to the SAT (美国学术能力倾向测验) will be the introduction of a new writing section. The writing section will consist of two parts: an essay and a multiple-choice section. Students will be given 25 minutes to respond to a prompt (提示) and construct a well-organized essay that effectively deals with the task. The essay question may require students to complete a statement, to react to a quote, or to agree or disagree with a point of view. In any case, a good essay will support the chosen position with specific reasons and examples from literature, history, art, science, current affairs, or even a student"s own experiences.
Essays will be scored based on the procedures for the current SAT II: Writing Test. Essays will be graded by two independent readers On a scale of 1~6, and their two scores will be combined to form an essay subscore that ranges from 2 to 12. Should the readers" scores vary by more than 2 points, a third reader will score the essay; The readers will be high school teachers and college professors who teach composition. To ensure that essays will be scored in a timely manner, they will be scanned and made available to readers on the Internet for grading purpose.
The writing section will also include multiple-choice grammar and usage questions. Some of these questions will call upon students to improve given sentences and paragraphs. Others will present students with sentences and require them to identify mistakes in diction (措辞), grammar, sentence construction, subject-verb agreement, proper word usage.
The highest possible score on the new writing section will be 800. Scores on the essay and multiple-choice section will be combined to produce a single score. A writing subscore will also be assigned. The highest possible scores on the Critical Reading and Math sections will remain 800 each, making 2,400 a perfect score on the new SAT.
小题1:Which parts are included in the writing section of SAT according to the passage?
A.Essay and multiple-choice. | B.Essay and critical writing. |
C.Multiple-choice and math. | D.Multiple-choice and literature. |
A.application of the Internet in scoring the essay |
B.relationship between high tech and testing |
C.cheating in the essay scoring procedure |
D.the scoring procedure of the essay |
A.The SAT is designed for high school seniors wishing to enter a college. |
B.The writer criticized the multiple-choice in the SAT. |
C.Good specific examples are encouraged in essay writing. |
D.The SAT consists of the Critical Reading, Math and the Writing sections. |
A.The new SAT scoring. | B.Language testing reform. |
C.College entrance exam reform. | D.The new writing section of SAT. |
Happiness and sadness are states of being that define the way we view the world. It is often said that some people by nature have a sunny character. Now scientists may have discovered why.
Some people may be born for happiness, while others are genetically negative, scientists have suggested in a study published late February in a British journal.
Earlier research had already established that the gene known as 5-HTTLPR plays a key role in determining how the neurotransmitter (神经传递素) serotonin (含于血液中的复合胺) works within the brain. Serotonin, a hormone (荷尔蒙), passes chemical messages between nerve cells. It has been closely linked to mood. Several anti-depressant (抗抑郁) drugs regulate serotonin levels. Scientists had also identified three variants (变体) of the gene. Two so-called "short" variants were linked to a higher risk of depression and suicide attempts. Unlike the two "short" variants, the "long" variant of 5-HTTLPR showed a clear dislike of negative images, such as fierce animals, and a clear liking for positive ones, such as flowers.
Researchers from the University of Essex in Britain, led by Elaine Fox, showed participants a series of images. The images were divided into three kinds: negative ones aimed at inspiring fear or stress such as a spider or person about to commit suicide, pleasant ones and neutral (中性的) ones. The participants who had the long variant of the 5-HTTLPR gene "showed a clear dislike of negative material alongside a careful attention for positive material," the researchers found. They paid close attention to the pretty pictures, and ignored the frightening ones. On the other hand, the short variant groups had the opposite reaction.
In January, the Australian government organized "happiness workshops", teaching government staff how to be happy. The department that held the "happiness workshops" said unhappy staff weren"t productive staff. Australian political opposition parties have argued that the "happiness workshops" are probably a waste of money and couldn"t increase productivity as intended. However, whether the workshop will have a happy or disappointing result, we will have to wait and see.
1. For the passage,by what means can we view the world?
A. Happiness and sadness. B. Happiness and curiosity.
C. Sadness and amazement. D. Disappointment and sadness.
2. What is most important in the role of deciding how the the neurotransmitter serotonin works within the brain?
A. The gene known as 5-HTTLPR. B. Three variants.
C. Neurotransmitter serotonin . D. A hormone.
3 Which of the following sentences is WRONG?
A. Serotonin, a hormone within the brain., passes chemical messages between nerve cells, which has been closely linked to mood.
B. Scientists identified the two "short" variants, and the "long" variant of 5-HTTLPR which showed a clear hatred of negative images, such as fierce animals.
C. Scientists identified three variants of the gene. Two so-called "long" variants were linked to a higher risk of depression and murder attempts.
D. In terms of researchers’ research, the images were divided into three kinds: negative ones, pleasant ones and neutral ones.
4. Why did the Australian government organize “Happiness workshops”?
A. To enrich staff’s free life.
B. To teach staff the ways to be happy.
C. To prove the result of the researchers’ research.
D. To test who weren’t productive staff.
5. What is the
![](http://img.shitiku.com.cn/uploads/allimg/20191216/20191216070316-24781.gif)
A. A waste of money.
B. No effect on increasing productivity.
C. A disappointing result .
D. An uncertain result.
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