题目
题型：不详难度：来源：
Because no light can get out, people can’t see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones.
Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or “staff”, in an object.
Another kind of black hole is called “stellar”(星球黑洞). Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way.
The largest black holes are called “supermassive”(超大质量黑洞). These black holes have masses that are more than one million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.
Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in.
A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole.
When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.
小题1:The gravity of a black hole may become so strong that light cannot get out when ____________.
| A．the star is going to die |
| B．special tools are used on it |
| C．other stars come close to it |
| D．it is seen from the space telescopes |
| A．A black hole can be very tiny but extremely heavy. |
| B．The gravity of a black hole holds all light in its center. |
| C．Scientists observe high-energy light through their own eyes. |
| D．Some small black holes came into being as early as the universe. |
| A．a black hole | B．the Milky Way |
| C．a series of stars | D．a planet near the earth |
| A．Neither the sun nor the earth is as heavy as a black hole. |
| B．There is a supermassive black hole at the center of the Milky Way. |
| C．The supermassive black hole had existed before the Milky Way was formed. |
| D．There is a reason why the large black holes are called “supermassive”. |
| A．what a black hole is |
| B．how black holes form |
| C．how big black holes are |
| D．how scientists know about black holes |
答案
小题1:A
小题2:C
小题3:C
小题4:D
小题5:D
解析
试题分析：文章介绍黑洞的形成，它的特点以及科学家探索研究黑洞的方法。
小题1:细节题：根据文章第一段中“This can happen when a star is dying.”可知恒星的死亡可能会形成黑洞。故选A。
小题2:细节题：根据第三段中“These black holes are very tiny but have the mass of a large mountain”这些黑洞可能会非常小，但是有一座山一样的质量，可知A正确；根据倒数第二段中“A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole.”黑洞不可见是因为强大的引力将所有的光线吸进黑洞的中间，可知B项正确；根据最后一句“Scientists use satellites and telescopes in space to see the high-energy light.”科学家们使用卫星和太空望远镜查看高能光，可知科学家不是用自己的眼睛，因此C错误；根据第六段中“Scientists think the smallest black holes formed when the universe began.”科学家认为最小的黑洞在宇宙开始时形成，可知D项正确。故选C。
小题3:推理题：根据第四段中“Earth’s galaxy is called the Milky Way”地球所在的星系叫银河系，常理可知星系是有很多星星组成的。故选C。
小题4:推理题：根据第五段最后一句“The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.”在银河系中心的超大质量黑洞的质量相当于四百万个太阳,是一个可以容纳几百万地球在内的巨大的球，由此可知这是在解释什么叫做“超大质量黑洞”。故选D。
小题5:推理题：阅读最后两段内容可知是在介绍科学家是如何找到黑洞的。故选D。
核心考点
试题【A black hole is a place in space where gravity pulls so much that even light can】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
And those college hopefuls are just the first edge of a wave of US students who no longer get much handwriting instructions in the primary grades, frequently 10 minutes a day or less. As a result, more and more students struggle to read and write cursive.
At Keene Mill Elementary School in Springfield, all their poems and stories are typed. Children in Fairfax County schools are taught keyboarding beginning in kindergarten. Older students who never mastered handwriting say it doesn’t affect their grades.
There are those who say the culture is at a crossing, turning from the written word to the typed one. If handwriting becomes a lost form of communication, does it matter?
It was at University Virginia that researchers recently discovered a previously unknown poem by Robert, written in his unique script. Handwritten documents are more valuable to researchers, historians say, because their authenticity(真实性) can be confirmed. Students also find them more fascinating.
The loss of handwriting also may be a cognitive(认知的) opportunity missed. Several academic studies have found that good handwriting skills at a young age can help children express their thoughts better—a lifelong benefit.
It doesn’t take much to teach better handwriting skills. At some schools in Prince George’s County, elementary school students use a program called Handwriting Without Tears for 15 minutes a day. They learn the correct formation of manuscript letters through second grade, and cursive letters in third grade.
There are always going to be some kids who struggle with handwriting because of their particular neurological(神经系统的) writing, learning issues or poor motor skills. Educators often point to this factor in support of keyboarding.
小题1:What is the author concerned about after 2012 Sat exams?
| A．Keyboarding. | B．Shorthand. | C．Handwriting. | D．Block letters. |
| A．prove how valuable handwriting is |
| B．explain what a famous poet he is |
| C．show how unique his poem is |
| D．stress how fascinating the documents are |
| A．the schools are responsible for the loss of handwriting |
| B．the loss of handwriting is a cognitive opportunity missed |
| C．it doesn’t take much to teach better handwriting skills |
| D．the culture is turning from the written word to the typed one |
| A．Kindergarten. | B．Primary school. |
| C．High school. | D．College. |
| A．Devotion. | B．Encouragement. | C．Critical. | D．Objective. |
Kind-hearted parents have unknowingly left their children defenseless against failure．The generation (age) born between 1980 and 2001 grew up playing sports where scores (marks) and performance (show) were played down because “everyone"s winner.” And their report cards sounded more positive than ever before．As a result, Stanford University professor Carol Dweck, PhD, calls them “the overpraised generation.”
Dweck has been studying how people deal with failure for 40 years．Her research has led her to find out two clearly different mind-sets that have a great effect on how we react to it．Here"s how they work:
A fixed mind-set is grounded in the belief that talent is genetic – you"re a born artist, point guard, or numbers person．The fixed mind-set believes it"s sure to succeed without much effort and regards failure as personal shame．When things get difficult, it"s quick to blame (liability), lie, and even stay away from future difficulties.
On the other hand, a growth mind-set believes that no talent is entirely heaven-sent and that effort and learning make everything possible．Because the ego (自尊) isn"t on the line as much, the growth mind-set sees failure as a chance rather than shame．When faced with a difficulty, it"s quick to rethink, change and try again．In fact, it enjoys this experience.
We are all born with growth mind-sets．(Otherwise, we wouldn"t be able to live in the world.) But parents, teachers, and instructors often push us into fixed mind-sets by encouraging certain actions and misdirecting praise．Dweck"s book, Mind-set: The New Psychology of Success, and online instructional program explain this in depth．But she says there are many little things you can start doing today to make sure that your children, grandchildren and even you are never defeated by failure.
小题1:What does the author think about the present generation?
| A．They don"t do well at school. |
| B．They are often misunderstood. |
| C．They are eager to win in sports |
| D．They are given too much praise. |
| A．doesn"t want to work hard |
| B．cares a lot about personal safety |
| C．cannot share his ideas with others |
| D．can succeed with the help of teachers |
| A．Admitting failure is shameful. |
| B．Talent comes with one"s birth. |
| C．Getting over difficulties is enjoyable. |
| D．Scores should be highly valued. |
An animal living in an environment where it is often threatened by predators(捕食者）will develop a negative emotion or “mood”, such as anxiety. However, one in an environment with plenty of opportunities to get resources for survival will be in a more positive mood state.
The researchers say that these emotional states not only show the animal’s experiences, but also help it decide how to make choices, especially in unclear situations. This could have good or bad results. An animal in a negative mood state will make a safety-first with a “pessimistic” response to an unclear event. For example, it considers a noise in the grass as a signal of the predator. At the same time, an animal in a positive mood state will benefit from a more “optimistic” response. It considers the noise as a signal of prey(猎物）.
Professor Mike Mendl, head of the Animal Welfare and Behavior Research Group at Bristol University’s School of Clinical Veterinary Science said, “ We can use “optimistic” or “pessimistic”decision-making as a symbol of an animal’s emotional state. Recent studies by our group and others suggest that this is a meritorious new approach to studying a variety of animal species.”
“Public interest in animal welfare remains high, with widespread concern about the way in which animals are treated, used and included in society. To understand how animals should be treated, we need to better understand their emotional lives,” Mike Mendl said. The researchers believe Mike Mendl’s study can help them to better understand and assess an animal’s emotions.
小题1:When an animal is in a negative mood state, _______.
| A．its response to an unclear event is pessimistic |
| B．it will pay little attention to an unclear event |
| C．it is easy for it to make right decisions |
| D．it has more opportunities to get food |
| A．valuable | B．useless | C．fashionable | D．hopeless |
| A．the animals with positive emotions live longer |
| B．there is no way to assess an animal’s emotions |
| C．few people care about animal welfare nowadays |
| D．the environment can influence animal’s emotions |
| A．tell people to build more protected areas for animals |
| B．explain animals should be regarded as people’s friends |
| C．raise people’s interest in studying animals |
| D．make people know how to treat animals properly |
| A．Different kinds of Animals’ Emotions |
| B．Emotions Helps Animals to Make Choice |
| C．The Living Environment of Wild Animals |
| D．The Best Way to Measure Animals’ Emotions |
Any vehicle is a hybrid when it combines two or more sources of power. Hybrid cars run off a rechargeable battery and gasoline. Hybrid cars have special engines, which are smaller than traditional gasoline engines. They run at 99 percent of their power when the car is cruising (匀速行驶). A specially designed battery motor provides extra power for running up hills or when extra acceleration is needed.
Step into a Prius, and turn on the engine. The first thing you notice is how much quieter it is than a traditional car. At this point, the car"s gasoline engine is dormant (休眠). The electric motor will provide power until the car reaches about 24 km/h. If you stay at a low speed, you are effectively driving an electric car, with no gasoline being used, and no waste gas gives off.
The onboard (车载的) computer makes the decision about when to use a gas engine, when to go electric, and when to use a combination of the two. If you go over 24 km/h, when you step on the gas pedal (油门), you are actually telling the computer how fast you want to go.
The electronic motor recharges automatically using a set of batteries. When driving at high speed, the gasoline engine not only powers the car, but also charges the batteries. Any time you use the brake, the electric motor in the wheels will work like a generator and produce electricity to recharge the batteries. As a consequence, the car"s batteries will last for around 200,000 miles.
小题1:The author writes this passage mainly to________.
| A．teach people how to drive a hybrid car |
| B．introduce a new kind of “green” car |
| C．show how to save their gasoline when driving a car |
| D．announce plans to develop hybrid vehicles for China |
| A．The hybrid cars reduce air pollution and oil shortages. |
| B．The car"s gasoline engine doesn"t work until it reaches about 24 km/h. |
| C．This kind of car is completely controlled by an onboard computer. |
| D．A specially designed battery motor provides extra power when needed. |
| A．They are powered by both a rechargeable battery and gasoline. |
| B．They are much quieter than traditional cars. |
| C．They only use 99 percent of their power to run up hills. |
| D．They have smaller engines than traditional gasoline ones. |
| A．The batteries can be recharged at any time you want. |
| B．Using the brake suggests that the gasoline engine should work. |
| C．The batteries will last for 200, 000 miles without being recharged. |
| D．The gasoline engine charges the batteries as well as powers the car. |
Five star fathers and their children travel around China, riding camels through the western deserts, fishing off the east coast, and selling vegetables for their bus fare home in remote southwestern Yunnan province. One dad doesn’t know how to do his daughter’s hair, but give him a couple of days — he’ll figure it out. Another one must survive with his son for three days in the desert, where, because neither can cook, the two only eat instant noodles.
These story lines are part of Where Are We Going, Dad? which, since its first show in October, has become one of China’s most popular television shows, covering more than 600 million viewers each week. And searches for Where Are We Going, Dad? turn up over 40 million hits on Sina Weibo, China’s Twitter.
“In traditional Chinese culture, the common conception of parenthood is that the father is strict and the mother is kind. But on the show, we see fathers who are much gentler on their kids and more concerned with their upbringing,” said Li Minyi, an associate professor of early childhood education at the leading Beijing Normal University. “An important question arises in this show for modern Chinese society — what is the role of fathers in today’s China?”
“As they raise their children, parents are growing up at the same time,” said Wang Renping, a popular education expert, in an interview with the Qianjiang Evening News. “They cannot use parenting styles from 20 years ago to guide the development of children born 20 years later.”
The attraction of Where Are We Going, Dad? lies in the chance to have a close look at the lives of popular Chinese stars and their children. Audiences fancy watching the failed attempts of star dads making dinner, braiding hair(编头发), and disciplining children — tasks often left to mothers in a society still influenced by the opinion that “men rule outside and women rule inside.”
小题1:From the passage, we can draw a conclusion that Where Are We Going, Dad? is .
| A．a TV show | B．a novel | C．a match | D．a news report |
| A．how the fathers do housework at home |
| B．how the children study in their spare time |
| C．how the fathers look after and guide their children |
| D．how the children help their father with their travel around China |
| A．In modern society, men should not care too much about their kids. |
| B．Where Are We Going, Dad has the most number of viewers in China. |
| C．In Chinese tradition, fathers always play an active part in their children’s lives. |
| D．While they bring up their children, parents are improving their parenting styles. |
| A．audiences enjoy laughing at others’ failure in life |
| B．it can make people laugh and think at the same time |
| C．people love watching the stars and their children’s lives closely |
| D．it presents a new generation of men’s role in their children’s lives |
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