Bicycle lights may not exactly be a problem that needs solving, but the following can be said about most of them ---- they’re easily stolen if left on an unattended bike. People riding at dusk can forget to turn them on, and those same people can forget to turn them off when they reach their destination. Well, the makers of the Blink/ Steady Bike Light have set out to address all of those shortcomings.
The waterproof(防水的) Blink/ Steady is so far only available as a tail light, although a head light is on the way. It’s fixed onto the bike’s seat post. A built- in photosensor(感光器) tells when it’s become dark enough for the light to be required, and allows it to come on once you begin the riding. According to the producers, it isn’t fooled by things such as headlights or streetlights. The light also contains an accelerometer, also known as a motion sensor, which can tell when the bike is in motion.
Between the two sensors, this means the light will come on only once it’s dark enough, and the bike is moving. Even when stopped at red lights, the small movements of the rider will reportedly be enough to keep the light activated---- it’ll go out after 30 seconds of complete inactivity. While this does mean that the two sensors are continuously powered up, they go into a very low---- power sleep pattern when the bike is sitting, unused.
Light is provided by two5- watt LEDs, seeable over a range of 180 degrees. And power comes from two AAA batteries, which provided up to 200 hours of continuous run time. The designers and engineers behind the Blink/ Steady are now raising money for its commercial production. About US $95 will get you one if they become available.
【小题1】The first paragraph is mainly to mean that______.
| A．bicycle lights are worth a research |
| B．bicycle lights are not a problem at all |
| C．bicycle lights are easy to deal with |
| D．bicycle lights are difficult to turn off |
| A．the weather | B．streetlights | C．headlights | D．natural light |
| A．To protect the bike against water. |
| B．To tell if the bike is moving. |
| C．To make the bike easy to ride. |
| D．To judge the speed of the bike. |
| A．It will be turned off immediately if the bike stops. |
| B．The traffic lights have no effect on the light. |
| C．It won’t use any power if the bike is unused. |
| D．It must meet two requirements if it comes on. |
【小题1】A
【小题2】D
【小题3】B
【小题4】D
解析试题分析：文章关注自行车车灯的问题。自行车车灯虽不像汽车车灯那样，是一个小问题，但也值得研究。文章介绍了一种自行车车灯的工作原理。
【小题1】根据第一段第一行“Bicycle lights may not exactly be a problem that needs solving, but the following can be said about most of them”可知，自行车车灯虽然不是一个太大的问题，但也值得研究。故选A。
【小题2】根据第二段“when it’s become dark enough for the light to be required”和“it isn’t fooled by things such as headlights or streetlights”可知，这种车灯会自己判断黑暗的程度来确定是否需要打开车灯，不会受到汽车前灯和路灯的影响。故选D。
【小题3】根据第二段最后一句“The light also contains an accelerometer, also known as a motion sensor, which can tell when the bike is in motion.”可知，accelerometer是用来判断自行车是否在行驶。故选B。
【小题4】根据第三段“Between the two sensors, this means the light will come on only once it’s dark enough, and the bike is moving.”可知，只有天足够黑，自行车在运转的时候，车灯才会亮。故选D。
考点：科技类短文阅读
长江作业本同步练习册系列答案科目：高中英语 来源： 题型：阅读理解
New research shows sheep are clever
People often make jokes about how dull sheep are, but new research shows they may be cleverer than we think. Researchers at the University of Cambridge discovered that Welsh mountain sheep have brainpower that equals rodents (啮齿动物). Tests found that the sheep can map the area they live in, and some may even be able to plan ahead.
Young fish prefer noisy neighbors
A new study has shown that young fish like to live on reefs with noisy neighbors! Researchers from the universities of Auckland and Bristol found that young fish looking for a home choose areas where other noisy fish live. The scientists produced all kinds of sounds which had been recorded in different natural environments. The young fish seemed to prefer the sounds of natural reefs, complete with noisy animals! The scientists compared the choice to a music fan wandering around at a music festival, choosing to set up a tent closest to the music they like best!
Butterflies are disappearing
A new study has shown that 17 species (物种) of butterfly found in Europe have dropped by 70% in the last 20 years. The information collected from 3,000 sites across 15 countries shows it may be caused by the loss (减少) of grasslands covered with flowers. You can encourage butterflies to come into your garden by planting flowers.
【小题1】What is the passage mainly about?
| A．Some new studies about animals. |
| B．People’s wrong ideas about animals. |
| C．Why the number of animals has dropped. |
| D．The importance of protecting animals. |
| A．are less clever than rodents |
| B．can find their home |
| C．can read maps |
| D．are good planners |
| A．live in a noisy environment |
| B．live in areas close to their parents |
| C．choose the reefs which are quiet |
| D．choose other kinds of fish as neighbors |
| A．The species of grass in grasslands. |
| B．The species of trees in grasslands. |
| C．The number of flowers in grasslands. |
| D．The number of animals in grasslands. |
| A．Geography. | B．Culture. | C．Travel. | D．Nature |
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科目：高中英语 来源： 题型：阅读理解
Everyone likes living in a clean and comfortable environment. If the envionment(环境) are bad, it will affect（影响）our body, and make us not feel well. Sometimes we may be terribly ill. At that time we don’t want to work, and we have to stay in bed and rest at home. So the envrionment is very important to us.
It’s germs that makes us ill. There are germs everywhere, They are very small and you can’t find them with your own eyes, but you can see them with a microscope（显微镜）They are very small and there may be hundreds of them on a very small thing, Germs can always be found in dirty water. When we look at dirty water under the microscope, we shall see them in it. Germs can also be found in air and dust（灰尘）. If you cut your finger, some of the dust from the floor may go into it, and you will have much pain in it. Sometimes the germs will go into all of your boby, and you will have pain everywhere.
To keep us healthy, we should try to our best to make our environment become cleaner and tidier. This needs us to act together.
【小题1】The writer tell us that________.
| A．we like working when we are ill |
| B．germs can’t live in the water. |
| C．we can’t feel ill if the environment is bad. |
| D．we feel well when the environment is good. |
| A．very small things that you can’t see with your eyes. |
| B．the things that don’t effect people. |
| C．the things that you can find with your eyes. |
| D．the things that are very big. |
| A．on the small thing | B．in air and dust |
| C．only in dirty water | D．everywhere |
| A．I will feel nothing. | B．I won’t mind. |
| C．I will feel tense. | D．I will feel painful. |
| A．environment doesn’t affect our life |
| B．we don’t need to improve our environment |
| C．germs may make us ill |
| D．if the environment is better, germs will be more. |
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科目：高中英语 来源： 题型：阅读理解
Passage 1
The information Highway is the road that links computer users to a large number of on-line services; the Web, e-mail, and software, to mention just a few. Not long ago, the information Highway was a new road, with not many users. Now, everyone seems to want to take a drive, with over 30 million families connected worldwide. Not surprisingly, this well-traveled highway is starting to look like a well-traveled highway. Traffic jams can cause many serious problems, forcing the system to close down for repair. Naturally, accidents will happen on such a crowed road, and usually victims are some files, gone forever. Then, of course, there’s Mr. Cool, with his new broad-band connection, who speeds down the highway faster than most of us can go. But don’t trick yourself; he pays for that speeding.
Passage 2
Want to know more about global warming and how you can help prevent it? Doctor Herman Friedman, who is considered a leading expert on the subject, will speak at Grayson Hall next Friday. Friedman studied environmental science at three well-known universities around the world before becoming a professor in the subject. He has also traveled around the world observing environmental concerns. The gradual bleaching (变白) of the Grate Barrier Reef, which came into the public eye in 2002, in his latest interest. Signed copies of his colorful book, which was published just last month, will be on sale after his talk.
【小题1】The Information Highway________.
| A．appeals to a large number of users |
| B．is crowded with car drivers |
| C．offers just a few on-line services] |
| D．is free from traffic accidents |
| A．By storing fewer files. |
| B．By repair the system. |
| C．By using a broad-band connection. |
| D．By buying a better computer. |
| A．There will be a book show at Grayson Hall |
| B．Friedman is now studying the Great Barrier Reef. |
| C．Friedman is a leading expert on computer science. |
| D．There will be a talk on global warming this week. |
| A．An ad for a new book. |
| B．A poster about a lecture. |
| C．A note to a doctor in a university. |
| D．An introduction to a professor. |
| A．Doctor Herman Friedman is a famous expert on environmental science. |
| B．A new book has been published recently by Doctor Herman Friedman. |
| C．The colorful new book, signed by him, will be sold before the talk. |
| D．Doctor Herman Friedman has studied the changes of the Grate Barrier Reef. |
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科目：高中英语 来源： 题型：阅读理解
U.S. Bottled Water Sales Are Booming Again Despite Opposition
Despite organized anti-bottled-water campaigns across the country and a noisy debate about bottled water’s environmental impact, Americans are buying more bottled water than ever.
Why do so many people seem to think they should have any input on what other American’s choose to buy or do?
If they want to buy bottled water, let them.
If they want to eat fast food, let them.
If they want to smoke pot, let them.
— Barackalypse
People just get tired of paying for others’ bad behavior. If many people eat excessive fast food, you pay higher insurance premiums. If many people frequently buy bottled water, your trash bills go up and landfills fill up quickly.www.zxxk.com
It’s about personal responsibility, which really should be a cornerstone of libertarianism.
— Bdbr
So? This is the price you pay to live in a free society. You want to control the life of another just so you can save a few bucks? What would you say when someone do the same to you?
— Norman619
Defend selfish pricks all you like; I’m just glad there are still people who still believe personal responsibility is a good and decent thing. We make your life cheaper and less bothersome.
— Yoyo
What a waste of money! It’s fine when you’re on the road and you need a cold drink, but people who buy cases of bottled water for home are completely crazy.
— Agmlauncher
I wish we all can find a way to improve things and benefit from this. The environment needs a lot of help but businesses will always work on what people would need and demand. Is this part of the balance? Hope we can find better ways.
— Skipweis
【小题1】What can we know about bottled water in America?
| A．Americans are consuming more bottled water than tap. |
| B．US bottled water sales have increased for the first time. |
| C．Activists in several regions have been fighting against it. |
| D．Some people worry about its bad effect on the environment. |
| A．Bdbr. | B．Norman619. | C．Yoyo. | D．Agmlauncher. |
| A．partly supportive of | B．extremely against |
| C．strongly in favor of | D．not concerned about |
| A．The environment is emphasized too much. |
| B．It’s impossible for people to find a better way. |
| C．Business is not totally responsible for the problem. |
| D．At present we can’t benefit from bottled water at all. |
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科目：高中英语 来源： 题型：阅读理解
Scientists say they now have proof to support the old-fashioned advice that it's best to sleep on a problem. They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day.
Lead researcher Bob Stickgold at the Harvard Medical School said, "Sleep helps us draw rules from our experiences. It's like knowing the difference between dogs and cats even if it's hard to explain."
The US research team studied how well students remembered connections between words and symbols (象征) , reports New Scientist. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night's sleep than after the same time spent awake during the day. They also found it easier to remember themes (主题) that the words had in common. But they forgot around one in four more themes if they had been awake. Prof. John Groeger, of Surrey University's Sleep Research Centre, said, "People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative (有助恢复的) value. " "We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all."
【小题1】The phrase" to sleep on a problem" in Paragraph 1 most likely means to______.
| A．pay full attention to a problem | B．wait until later for a decision |
| C．sleep to forget a problem | D．have difficulty sleeping |
| A．put together words of similar meanings |
| B．remember words and their meanings |
| C．show their knowledge of words |
| D．make up lists of related words |
| A．Themes learned right before the test |
| B．Rules from personal experience |
| C．Words learnt before a good sleep |
| D．Ideas stored together in the brain |
| A．It shows sleep may help us manage information |
| B．It helps find out the common themes of word |
| C．It tells us that more sleep can improve health |
| D．It proves the value of old-fashioned advice |
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科目：高中英语 来源： 题型：阅读理解
Back in old times, people had little knowledge about the universe and nature. Things we now consider to be common sense were mysteries to our ancestors.
Over the years, major breakthroughs have been made in science and many phenomena have been explained. But still, there are always questions we can't yet answer, and The Guardian has listed some of them.
1. What makes us human?
Just looking at your DNA won't tell you - human DNA is 99 percent identical to that of the chimpanzee and, believe it or not, 50 percent identical to a banana's! A lot of the things we once thought were unique about us - language and tool use, recognizing ourselves in the mirror and so on – have since been seen in other animals. Perhaps it's our culture that makes the difference or maybe our ability to use fire. It's also possible that our capacity (能力) for co-operation and our trading skills are what make us unique.
2. Why do we dream?
Given the fact that we spend around a third of our lives sleeping, shouldn't we know everything about it? Unfortunately, scientists are still searching for a complete explanation of what happens when we sleep and why we dream.
Austrian psychologist Sigmund Freud believed dreams were the expressions of wishes that we can't fulfill in our real lives. Others have wondered whether dreams are just random "noise" coming from a sleeping brain.
3. Could we someday live forever?
Apart from accidents, most people die because of diseases that can be treated and aging. And since many diseases, such as diabetes（糖尿病） and cancer, are diseases of aging, treating aging itself could be the key to extending our lives.
Our knowledge of what causes us to age - and what allows some animals to live longer than others - is expanding rapidly. And though we haven't quite worked out all the details, we've worked out some pieces of the puzzles such as DNA damage and metabolism (新陈代谢), which are all leading to the invention of drugs that can slow down the aging process.
If we're lucky enough to lengthen our lives, we might even get to see the day when all of these questions are answered.
【小题1】The main point of the passage is ______.
| A．to inform people of the knowledge about the universe and nature |
| B．to introduce major breakthroughs that have been made in science |
| C．to present some questions we can't yet answer |
| D．to explain what were once mysteries to our ancestors |
| A．human beings are actually not different from other animals |
| B．animals have completely different DNA from that of plants |
| C．both animals and plants share the same amount of DNA |
| D．DNA alone is not good enough to make humans different |
| A．mysterious | B．unique | C．advanced | D．same |
| A．What were mysteries to our ancestors are considered to be common sense now. |
| B．Now we know much more about dreams than our ancestors did in the past. |
| C．With the invention of new drugs people can possibly live even longer. |
| D．If all the diseases can be treated people can theoretically live forever. |
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科目：高中英语 来源： 题型：阅读理解
All over the world people enjoy sports, Sports help to keep people healthy and happy, and to live longer.
Many people like to watch others play games. They buy tickets or turn on their TVs to watch the games. Often they get very excited when “their” player or team wins.
Some sports are so interesting that people everywhere go in for(参加) them. Football, for example, has spread(展开)around the world. Swimming is popular in all countries near the sea or in those with many rivers. What fun it is to jump into a pool or lake, whether in China, Egypt or Italy! And think of people in cold countries. Think how many love to skate or ski (滑雪) in Japan, Norway or Canada.
Some sports or games go back thousands of years, like running or jumping. Chinese wushu, for example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred years old yet. People are inventing new sports or games all the time. Water-skiing is one of the newest in the family of sports.
People from different countries may not be able to understand each other, but after a game together they often become good friends. Sports help to train a person’s character. One learns to fight hard but fight fair, to win without pride and to lose with grace(胜不骄，败不馁).
【小题1】Why do people all over the world enjoy sports?
| A．Because they are healthy. |
| B．Because they are happy. |
| C．Because they want to live longer. |
| D．All the above. |
| A．their favourite team wins | B．they win the game |
| C．they get the good news | D．they can’t help themselves |
| A．they train their character in the game |
| B．they understand each other |
| C．they are friendly to each other |
| D．they help each other |
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科目：高中英语 来源： 题型：阅读理解
As most university students are packing their bags，boarding trains or flying home for the Spring Festival，some will stay behind to spend the holiday on campus．
Zhou Yunyun，22，a senior finance major at Jilin University，has decided that instead of traveling to Hainan province，he will kill the time by playing computer games with his online friends．
“I'm used to chatting and playing with them every day．It’s just fun to make friends this way，”he said．“When I returned home in past years，my relatives always asked me a lot of questions about my plans after graduation．They had high expectations of me，which made me feel stressed，” said Zhou．
The campus，usually lively，will probably turn into a death town，with most restaurants，shops and student centers closed during the break．But there are also a few advantages，according to Jia Debao，2 1，a junior majoring in administration at China Agricultural University．“I might feel a bit lonely，but at least I can stay away from my parents’ complaining and enjoy the peaceful and quiet stay，” he said．“More importantly，I can enj oy the high speed of the Internet，I can always find empty seats in classrooms，and I don’t have to wait to use the bathroorm” But education experts recommend students who stay on campus to come up with more interactive plans．That’s because communication on the Internet can’t replace real life interpersonal relationships．
Society has promoted a kind of“couch potato" or close-in culture among some young people, according to Shi Tongyu, a researcher at the Chinese Academy of Social Sciences. He warned that this kind of lifestryl can damage students’ mental and physical development.
“When you constantly stare at a computer screen and type on your keyboard，you gradually lose the ability to socialize and survive normally，"said Shi．“A human’s most important task is to survive，which cannot be completed by staying at home all the time． Instead，it must be achieved through real life experience and communication．”
【小题1】What can we learn about Zhou Yunyun?
| A．He feels very lonely on campus． |
| B．He will promote close-in culture． |
| C．He will spend the Spring Festival with relatives． |
| D．He will spend the Spring Festival with on-line friends． |
| A．he will miss his parents a little bit |
| B．there will be more seats in classrooms |
| C．he will have a quiet and peaceful break |
| D．the speed of the Internet will get faster |
| A．inactive person | B．close friend |
| C．sociable student | D．addicted gamer |
| A．To do some traveling． |
| B．To stay more with families． |
| C．To find empty seats in classrooms． |
| D．To experience real life and communication． |
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