Sixty-five million years ago, an asteroid (小行星) that crashed on Earth led to the disappearance of the largest animals that have ever walked our planet – the dinosaurs. At least, this is what some scientists believe. But that accident happened so long ago. People have come to believe that we are free of threats from asteroids and everything else from space.
However, what happened on Feb 15 , 2013 was a reminder that we’re just as vulnerable as the dinosaurs once were. Two objects from space – a meteor (陨石) and an asteroid called 2012 DA14 – visited Earth’s atmosphere on the same day. The former fell in Russia, injuring 1,200 people, while the latter passed by Earth at a record-setting close distance.
Scientists had been expecting the asteroid since last year, but the meteor was a surprise. NASA’s telescope system only detects asteroids at least 50 meters in diameter (直径), which is just about the size of 2012 DA14. But the meteor was much smaller, which made it harder to spot.
But what if we do spot an asteroid that is headed right for Earth? There are several possible ways in which dangerous asteroids could be made to change its orbit. Which method is best depends on several factors and most importantly – how much time we have to stop it.
If there is enough time before the hit, we can send off a heavy spacecraft to travel alongside the asteroid. The gravity from the spacecraft would gradually change the rock’s orbit. Besides that, scientists could one day use sun-powered lasers to either make asteroids disappear or change their course. If there’s not enough time, we’ll have to go after the asteroid with a spacecraft and change its orbit with a crash. Finally, if things are truly desperate, there will be only one choice left – to use a nuclear bomb. That could turn the asteroid into a meteor shower, which would be even more dangerous.
【小题1】The author mentioned the asteroid that led to the dinosaurs’ dying out to ______.
| A．show that asteroids fall from space frequently |
| B．alert people about the possible danger of objects falling from space |
| C．inform readers about the constant threats the Earth faces |
| D．suggest that there are still many mysteries about the universe |
| A．unprotected | B．lonely | C．stupid | D．self-important |
| A．It passed by the Earth at a close distance. |
| B．It was spotted by NASA’s telescope system a year ago. |
| C．It is about the same size as the asteroid that passed by the Earth. |
| D．It fell to the Earth and caused great damage to the local community. |
| A．Learning about asteroids and meteors. |
| B．The threats of objects from space and possible solutions. |
| C．NASA’s latest technology to discover visitors to the Earth from space. |
| D．How to measure the damage of collisions from asteroids and meteors. |
【小题1】B
【小题2】A
【小题3】D
【小题4】B
解析试题分析：本文是一篇科技说明文。文章介绍了小行星和陨石可能对人类造成的伤害，以及人类为消除危害可能采取的措施和方法。
【小题1】考查推理判断。根据文章第一段中的Sixty-five million years ago, an asteroid (小行星) that crashed on Earth led to the disappearance of the largest animals that have ever walked our planet – the dinosaurs.可知，作者引用小行星撞击地球导致恐龙灭绝这个事实，来警示人们小行星和陨石可能对地球造成严重危害的严重性。故选B。
【小题2】考查推测词义。根据文章第二段中的we’re just as vulnerable as the dinosaurs once were.可知，我们就像从前的恐龙一样无助而灭绝。所以A正确。
【小题3】考查细节理解。根据文章第二段中的The former fell in Russia, injuring 1,200 people可知，前一颗陨石落在了俄罗斯，造成1200受伤。因此和D项内容吻合。
【小题4】考查主旨大意。纵观全文可知：第一段通过恐龙灭绝的事实，引起人们对小行星和陨石对人类造成的危害重视；第二段谈下落在俄罗斯的陨石造成的危害；第三、四、五段谈目前人类的观测技术及我们应对陨石危害的方法和措施。所以B项正确。
考点：考查科技说明文的阅读。
名师伴你成长课时同步学练测系列答案科目：高中英语 来源： 题型：阅读理解
Beautiful cars surrounded by even more beautiful models—it’s no secret why the 2012 Beijing Auto Show was popular．
The exhibition was held between April 23 and May 2．Although renowned companies showed off their top models，it wasn’t just their expensive sports cars that grabbed people’s attention．
Concept cars are a way for designers to test out their ideas on the public with complete freedom．They can try out cars with special features that could not be massively（批量）produced easily．
Designers don’t have to follow industry rules；they don’t even need to worry about whether their cars would be followed on the roads．
At the Beijing Auto Show，the@Ant by Chery was one concept car to draw a lot of attention．China Daily called it‘‘the very definition of a concept car”．
The vehicle is powered by electricity and is capable of driving itself．But the magic doesn’t end there．
The@Ant was inspired by actual ants．According to Car News China，with the help of automated telemetric systems，@Ants are able to“see” other@Ants and compare destination information. If two are heading the same way for a while, the vehicles connect, with one car’s rear (后面的)wheels matching up with the front wheels of another car．Up to 10@Ants can be put together and will automatically connect to form a“train"．This will help save energy while traveling, as well reducing traffic jams.
The car sounds like a great idea．Further research will be needed to turn this concept car into something for the market，but concepts like Cherry’s show how carmakers are working for cleaner and greener vehicles．It’s like what the@Ant motto says，“Exploring future human beings’lifestyles”．
【小题1】The concept car is getting popular because .
| A．it looks like an ant |
| B．it is beautifully designed |
| C．it is exhibited as a top model |
| D．it conveys a new idea for the future |
| A．By connecting each other and running together |
| B．By driving themselves without man’s control |
| C．By comparing their destination information |
| D．By reducing traffic jams on the roads |
| A．to test the safety of the concept car |
| B．to follow the rules in the car industry |
| C．to show their unique idea of complete freedom |
| D．to see if concept cars can be massively produced |
| A．Concept Cars Are Driving to the Future |
| B．The@Ant Draws a Lot of Attention |
| C．The@Ant Is a Top Model of Concept Cars |
| D．Concept Cars Are Cleaner and Greener |
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科目：高中英语 来源： 题型：阅读理解
Exhausted and unhappy, you still have to squeeze a smile to your friends, or teachers. That’s just life, you may think. But new research suggests that putting on a fake smile can worsen people’s mood and even lower work efficiency.
Lead researcher Brent Scott with other researchers studied a group of bus drivers for two weeks. They tried to find out what happened when the drivers were involved in “surface acting” or fake smiling, and the opposite, “deep acting” which means people put on real smiles by recalling pleasant memories or thinking about their current situation more positively.
The results showed that on days when drivers were forced to smile, they felt depressed and didn’t want to work. On days when they smiled due to positive thoughts, their mood improved a lot as well as their work efficiency.
The research goes against the popular belief among companies that employees should be cheerful to customers at all times. They include employees of shops, banks, call center workers and others who have face-to-face contact with members of the public. “Smiling for the sake of(为了) smiling can lead to emotional exhaustion and coldness, and that’s bad for the organization,” Scott told the Daily Mail.
The study also showed that women were harmed more by fake smiling than men. Their mood and work performance both worsened more. But they were helped more by deep acting — their mood became better and they worked more efficiently.
However, while deep acting seemed to improve mood in the short term, Scott says it’s not a long-term solution for unhappiness.
“There have been some suggestions that if you do this over a long period that you start to feel inauthentic(不真实的),” Scott said. “You may be trying to cultivate positive emotions, but at the end of the day you may not feel like yourself anymore.”
【小题1】Brent Scott and others’ experiments on bus drivers suggest that ______.
| A．depression among bus drivers is common |
| B．thinking in a positive way helps with work efficiency |
| C．bus drivers with pleasant memories tend to be less efficient |
| D．the bus drivers’ work efficiency is determined by their mood |
| A．It is good for the business but bad for the employees. |
| B．It doesn’t work on people who are emotionally expressive. |
| C．It is a widely accepted cultural practice in the US. |
| D．It causes more harm to women than men. |
| A．people should be true to their feelings |
| B．smiling helps to put people in a good mood and become more efficient |
| C．it is unnecessary to cultivate positive emotions |
| D．deep acting can improve mood in the long run |
| A．the importance of smiling during face-to-face contact |
| B．a new study on fake smiling and its influence on people |
| C．suggestions on improving work efficiency |
| D．how to cheer up when you are exhausted |
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科目：高中英语 来源： 题型：阅读理解
People diet to look more attractive．Fish diet to avoid being beaten up，thrown out of their social group，and getting eaten as a result．That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists．
The research team have discovered that subordinate(低一等的) fish voluntarily diet to avoid challenging their larger competitors．"In studying gobies we noticed that only the largest two individuals，a male and female，had breeding（繁殖）rights within the group，" explains Marian Wong．"All other group members are nonbreeding females，each being 5-10% smaller than its next largest competitor．We wanted to find out how they maintain this precise size separation．"
The reason for the size difference was easy to see．Once a subordinate fish grows to within 5-10% of the size of its larger competitor，it causes a fight which usually ends in the smaller goby being driven away from the group．More often than not，the evicted fish is then eaten up．
It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish．Whether they did so voluntarily，by restraining how much they ate，was not clear．The research team decided to do an experiment．They tried to fatten up some of the subordinate gobies to see what happened．To their surprise，the gobies simply refused the extra food they were offered，clearly preferring to remain small and avoid fights，over having a feast．
The discovery challenges the traditional scientific view of how boss individuals keep their position in a group．Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves，so keeping their competitors small．
While the habits of gobies may seem a little mysterious，Dr．Wong explains that understanding the relationships between boss and subordinate animals is important to understand how hierarchical（等级的）societies remain stable．
The research has proved the fact that voluntary dieting is a habit far from exclusive to humans．"As yet，we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature，" the researchers comment．"Data on human dieting suggests that，while humans generally diet to improve health or increase attractiveness，rarely does it improve long-term health and males regularly prefer females that are fatter than the females' own ideal．"
【小题1】When a goby grows to within 5-10% of the size of its larger competitor，it _________．
| A．leaves the group itself | B．has breeding rights |
| C．eats its competitor | D．faces danger |
| A．the fish beaten up | B．the fish driven away |
| C．the fish found out | D．the fish fattened up |
| A．fought over a feast | B．preferred some extra food |
| C．challenged the boss fish | D．went on diet willingly |
| A．Fish dieting and human dieting． | B．Dieting and health． |
| C．Human dieting． | D．Fish dieting． |
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科目：高中英语 来源： 题型：单选题
An idea that started in Seattle's public library has spread throughout America and beyond. The concept is simple: help to build a sense of community in a city by getting everyone to read the same book at the same time.
In addition to encouraging reading as a pursuit (追求) to be enjoyed by all, the program allows strangers to communicate by discussing the book on the bus, as well as promoting reading as an experience to be shared in families and schools. The idea came from Seattle librarian Nancy Pearl who launched (发起）the "If All of Seattle Read the Same Book " project in 1998. Her original program used author visits, study guides and book discussion groups to bring people together with a book, but the idea has since expanded to many other American cities, and even to Hong Kong.
In Chicago, the mayor appeared on television to announce the choice of To Kill a Mockingbird as the first book in the "One Book, One Chicago" program. As a result, reading clubs and neighborhood groups sprang up around the city. Across the US, stories emerged of parents and children reading to each other at night and strangers chatting away on the bus about plot and character.
The only problem arose in New York , where local readers could not decide on one book to represent the huge and diverse population. This may show that the idea works best in medium-sized cities or large towns, where a greater sense of unity(一致）can be achieved .Or it may show that New Yorkers rather missed the point, putting all their energy and passion into the choice of the book rather than discussion about a book itself.
As Nancy points out, the level of success is not measured by how many people read a book, but by how many people are enriched by the process or have enjoyed speaking to someone with whom they would not otherwise have shared a word.
【小题1】What is the purpose of the project launched by Nancy?
| A．To invite authors to guide readers |
| B．To encourage people to read and share. |
| C．To involve people in community service |
| D．To promote the friendship between cities. |
| A．They had little interest in reading. |
| B．They were too busy to read a book. |
| C．They came from many different backgrounds. |
| D．They lacked support from the local government. |
| A．In large communities with little sense of unity |
| B．In large cities where libraries are far from home |
| C．In medium-sized cities with a diverse population |
| D．In large towns where agreement can be quickly reached |
| A．exchanged ideas with each other |
| B．discussed the meaning of a word |
| C．gained life experience |
| D．used the same language |
| A．the careful selection of a proper book |
| B．the growing popularity of the writers |
| C．the number of people who benefit from reading |
| D．the number of books that each person reads |
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科目：高中英语 来源： 题型：阅读理解
Organic food, once considered something that only health fanatics desired, is now a regular feature at most supermarkets. And that has created a bit of a dilemma. On the one hand, you have a conventionally grown apple. On the other, you have one that’s organic. Both apples are firm, shiny and red. Both provide vitamins and fiber, and both are free of fat, sodium and cholesterol.
Conventionally grown food generally costs less, but is organic food a better choice? The advantages claimed for such foods over conventionally grown and sold food products are now being debated on a large scale. Supporters of organic foods ― a term whose meaning varies greatly ―are frequently telling the world that such products are safer and more nutritious than others.
The growing interest of consumers in the safety and nutritional quality of daily foods is a welcome development. However, much of this interest has been aroused by sweeping claims that the conventional food supply is unsafe or inadequate in meeting nutritional needs.
Almost daily, the public is surrounded by claims for “no-aging” diets, new vitamins and other wonder foods. There are numerous unsubstantiated(没证实的) reports that natural vitamins are superior to man-made ones, that fertilized eggs are nutritionally superior to unfertilized eggs, that untreated grains are better than those treated with insect spray and the like.
Although most of these claims are not supported by scientific evidence, large amounts of written material about the benefits of organic foods makes it difficult for people to separate fact from fiction. As a result, claims that eating a diet consisting of organically grown foods prevents or cures disease or provides other benefits to health have become widely advertised and form the basis for people’s opinion.
One thing that most organically grown food products seem to have in common is that they cost more than conventionally grown foods. But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern if consumers, particularly those with limited incomes, distrust the conventional food supply and buy only expensive organic foods instead.
【小题1】According to Paragraph 2, which of the following statements about organic food is true?
| A．It hasn’t been used until recent years. |
| B．It has no agreed definition. |
| C．It is popular among producers. |
| D．It is accepted by most nutritionists. |
| A．healthier food | B．organic food |
| C．conventionally grown food | D．expensive food |
| A．most doctors believe organic foods prevent disease or provide other benefits to health |
| B．organic foods are actually less nutritious than conventionally grown foods |
| C．people cannot separate fact from fiction because of the TV advertisements |
| D．organic foods cost more but are not necessarily better than conventionally grown foods |
| A．want to try something new |
| B．have carefully researched the products |
| C．value food safety and nutrition |
| D．expect to save some money |
| A．Doubtful. | B．Enthusiastic. |
| C．Supportive. | D．Uninterested. |
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科目：高中英语 来源： 题型：阅读理解
What is a six-letter word that immediately comes to mind when you need some information on the Internet? You probably thought of Google. But Google wasn’t always the name of the famous search engine. In fact, the original name was BackRub!
BackRub was the name two graduate students gave to the new search engine they developed in 1996. They called it BackRub because the engine used backlinks to measure the popularity of Web sites. Later, they wanted a better name — a name that suggests huge quantities of data. They thought of the word googol. (A googol is a number followed by 100 zeros.) When they checked the Internet registry of names to see if googol was already taken, one of the students misspelled the word by mistake, and that’s how Google was born.
Google is just one example of a name change in the business world. Many other companies have decided to change their names or the names of their products. Here are some more examples:
Jerry Yang and David Filo, two young computer specialists, developed a guide to Internet content in 1994. They called it “Jerry and David’s Guide to World Wide Web.” But they soon realized that this wasn’t a very catchy name, so they searched through a dictionary and found a better one: “Yahoo.”
Sometimes companies change their names because of the popularity of one of their products. In 1962, a young runner named Phil Knight started a company called Blue Ribbon Sports. In 1971, Knight decided to design and manufacture his own brand of shoes. He named the shoes after the Greek goddess of victory — Nike. Nike shoes became so well known that Knight changed the name of the whole company to Nike.
【小题1】According to the text, Google .
| A．has been famous since 1996 |
| B．is a result of a spelling mistake |
| C．means a number followed by 100 zeros |
| D．is the original name of the search engine |
| A．had been registered | B．had been forgotten |
| C．was not attractive | D．was too short |
| A．its founders | B．its customers |
| C．its popular products | D．its advanced techniques |
| A．The name changes | B．The history of Google |
| C．How to choose a name? | D．Why are names important? |
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