题目
题型：不详难度：来源：
they have developed an experimental device that produces electricity from the physical movement of a person walking. British scientist Max Donelan and other scientists in Canada and the United States developed the device.
The device connects to a person’s knee. As the person walks, the device captures energy each time the person slows down. To do this, the device helps with the slowing down movement of the leg. The movements of the walking person push parts of a small machine
that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers(起搏器). It could even be used to assist in the movement of robotic arms and legs.
The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy. But the researchers hope to make a lighter, less costly version. An improved version shou1d be ready in one year.
The developers hope the device will one day help developing countries. Near1y twenty five percent of people around the world live without electric power.
A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania. He created a bag carried on a person’s back that also produces power from wa1king.
The knee device does not produce as much electricity as the bag. But the bag requires the walker to carry a load of twenty to thirty kilograms.
小题1:The second paragraph mainly talks about .
| A．who developed the device |
| B．how the device works |
| C．several possible uses for the devices |
| D．how much electricity the device can produce |
| A．It is too heavy for the walker to bear. |
| B．It is too complex for people to use. |
| C．It is too expensive for most people to afford. |
| D．It will slow down one’s walking speed. |
| A．produces power without adding more loads to the walker |
| B．can produce more power in a much shorter time |
| C．needs to be equipped with a battery |
| D．can help the walker wa1k faster |
| A．help housewives operate the washing machine |
| B．make it much easier for us to go online |
| C．produce more electricity than that invented by Larry Rome |
| D．be applied in medicine to operate heart pacemakers |
| A．First device powered by walking wi1l soon be on the market |
| B．Advanced technology brings in a new way to operate heart pacemakers |
| C．Device gives new meaning to the idea of power walking |
| D．Human energy will become a main source of electricity |
答案
小题1:B
小题2:C
小题3:A
小题4:D
小题5:C
解析
试题分析：科学家研制出一种固定在人膝盖上的发电装置。这种装置可通过收集人走路时损失的能量发电。
小题1:段落大意题。第二段主要讲了这种电子装置的工作原理，即它是如何利用人步行来发电的。故选B。
小题2:细节推断题。根据第四段中的it is too costly for most people to buy可知这种实验版的设备费用太高，大多数人买不起。故选C。
小题3:推理判断题。根据末段可知，过去Larry Rome发明的设备虽然也是靠行走获取能量，但是需要步行者背重达20到30公斤的负荷，而这种佩戴在膝盖上的设备重量只有1.5公斤，不需增加步行者的太多负担。故选A。
小题4:细节理解题。根据文章第3段the device could also be used in hospitals to operate heart pacemakers可直接选出答案D项。A项文中没有涉及到，B项表述不科学，根据文章最后一段可以推断C项表述错误。故选D。
小题5:归纳文章标题。文章主要突出的内容是这种新的电子设备使得利用人步行获取能量变得轻松、容易。故选C。
核心考点
试题【Electrical devices(仪器)could soon use power made by human energy. Scientists sayt】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
In the not so distant past of the 1950s, people who wanted to research an idea, a product, or anything else, had to go to a library where they could look up information in books. Not all people had the same access to the books, and the information they contained. In America, if your skin was black, you could not use the same library that a person with white skin used. If a black skinned person was allowed access to a library, it most likely was stocked with outdated books that white skinned people had discarded.
In the digital society we live in today, the color of your skin does not determine the access you have to information. Technology has brought to us the powerful tools like the Internet where we can find information on almost every subject.
Access to the Internet has allowed us to research the things we are planning to purchase. We are capable of comparing prices on things like insurance, appliances, entertainment, clothing, and all other things. We also now have the ability to purchase items online without ever leaving our homes. We have been freed from the restrictions of store hours, and regional sales. A person in America can purchase a product from a person in Germany, without leaving home.
Because of the digital society we live in our children can learn about anything they are interested in. When they ask you what the dinosaurs ate, you can look it up, and tell them the answer. Because of this people will be smarter in the future, and technology will only improve.
小题1:By “We should not take this privilege for granted”, the writer means that ______.
| A．we have special right to do anything |
| B．it is wrong to make use of the privilege |
| C．knowledge is important in the digital society |
| D．we should seize the chances the modern society offers |
| A．the Internet brings us a lot of convenience |
| B．people in modern society are mostly wealthy |
| C．we would like to stay at home every day |
| D．we can find anything we like in the world |
| A．people will be much clever than ever |
| B．what the dinosaurs ate seems strange to us |
| C．finding out what the dinosaurs looked like is easy |
| D．we can learn knowledge with the help of technology |
| A．critical | B．positive | C．neutral | D．negative |
Researchers, with the help of brain scans, have ______ shocking differences in perception between Westerners and Asians, what they see when they look at a city street, for example, or even how they are _____ of a simple line in a square, according to findings published in a(n) _____ science journal.
In Western countries, culture makes people think of themselves as highly ______ entities. When looking at scenes, Westerners tend to focus more on central objects than on their surroundings. East Asian cultures, however, ________ inter-dependence, When Easterners look at a scene, they tend to focus on the surroundings as well as the object.
Using an experiment ________ two tasks, Dr. Hedden asked subjects to look at a line simply to estimate its length, a task that played to American’s _______. In another, they estimated the line’s length relative to the size of a square, an easier task for the Asian.
The level of brain activity, by ______ blood flow, was then measured by Brain Scanners. The experiment found that although there was no difference in performance, and the tasks were very easy, the levels of activity in the subjects’ brain were ______. For the Americans, areas ______ to attention were more favorable to them, when they worked on the task they tended to find more difficult --- estimating the line’s size relative to the square. The findings are a ______ of more than ten years of previous experimental research into East-West differences.
In one study, for instance researchers ______ people a choice among five pens; four red and one green. Easterners were more likely to choose a red pen, and Westerners were more likely to choose the green one.
Culture does not only make a(n) ______ on how you see the world, but how you choose to understand and internalize it. But such habits can be changed. Some psychological studies suggest that when an Easterner goes to the West or vice versa, habits of thought and perception also begin to change. Such research gives us ______ to how our brain works and holds new promises for us to develop programs to improve our memory techniques and __________ our learning skills.
| 小题1: |
|
| 小题2: |
|
| 小题3: |
|
| 小题4: |
|
| 小题5: |
|
| 小题6: |
|
| 小题7: |
|
| 小题8: |
|
| 小题9: |
|
| 小题10: |
|
| 小题11: |
|
| 小题12: |
|
| 小题13: |
|
| 小题14: |
|
| 小题15: |
|
All our dreams have something to do with our feelings, fears, longings, wishes, needs and memories. If a person is hungry , or tired or cold , his dreams may include a feeling of this kind ．If the covers on your body , such as a quilt or a blanket have slipped off your bed , you may dream that you are sleeping on the ice and snow. The material for the dream you will have tonight is likely to come from the experience you have today.
So the subject of your dream usually comes from something that has effect on you while you are sleeping （feeling of cold, a noise, a discomfort, etc．） and it may also use your past experiences and the wishes and the interests you have now．This is why children are likely to dream of fairies, older children of school examinations, hungry people of food, home-sick soldiers of their families and prisoners of freedom．
To show you how this is happening while you are asleep and how your needs and wishes can all be joined together in a dream , here is the story of the experiment．A man was asleep and the back of his hand was rubbed with a piece of absorbed cotton．He would dream he was in hospital and his charming girlfriend was visiting him , sitting on the bed and feeling gently his hands!
There are some scientists who have made a special study of why we dream, what we dream and what those dreams mean．Their explanations of dreams , though a bit reasonable, is not accepted by everyone but it offers an interesting approach to the problem．They believe that dreams are mostly expressions of wishes that do not come true．In other words, dreams are a way of having your wishes carried out．
小题1:From the passage we know that our dreams ___________.
| A．are imagination of our daily life |
| B．are man’s curious look into the future |
| C．have nothing to do with our feelings |
| D．are to some degree connected with our feelings |
| A．they are interested in exams |
| B．they are often worried about their studies |
| C．they hope for a better life |
| D．they show much interest in their studies |
| A．is considered interesting , but unreasonable |
| B．gives a good answer to the question why we dream |
| C．has some value , though not fully convincing |
| D．has been proved by the findings of their studies |
| A．Why People Dream ? | B．New Findings about Dreams |
| C．Dream Makes Hopes | D．What Dreams Mean ? |
Skyscrapers are also lavish consumers of electric power and water. In just one recent year, the addition of 17 million square feet of skyscraper office space in New York City itself has already raised the top daily demand for electricity by 120, 000 kw — enough to supply the entire city of Albany in New York area for a single day.
Glass—walled skyscrapers can also be especially wasteful. The heat loss ，or gain， through a wall of half 一 inch plate glass is more than ten times that through a typical ordinary wall filled with bricks or board. In order to decrease the pressure on heating and air — conditioning equipment, builders of skyscrapers have begun to use double—layered glass ，and reflective glasses coated with silver or gold mirror films that could reduce glare (强光）as well as heat gain. However, mirror — walled skyscrapers may raise the temperature of the surrounding air and affect neighboring buildings as well.
Skyscrapers put a severe pressure on a city"s sanitation (卫生）facilities, too. If fully occupied, the towers just within the central area of New York would alone produce 2. 25 million gallons of waste water each year^—as much as the city size of Stanford， Connecticut, which has a population of more than 109，000.
小题1:The underlined phrase“ lavish consumers ”in the 2nd paragraph probably means ____
| A．trash producers | B．great spenders | C．pressure makers | D．poor customers |
| A．show how skyscrapers manage to lessen their pressure |
| B．explain why skyscrapers can control its air conditions |
| C．describe further how wasteful skyscrapers could be |
| D．present the stability of skyscrapers in modern buildings |
| A．central New York skyscrapers are a large waste water producer |
| B．the central area of New York is as large as the city of Stanford |
| C．more than 109，000 people live in the skyscrapers in New York |
| D．New York produces 2. 25 million gallons of waste water each year |
| A．positive | B．doubtful | C．grateful | D．negative |
Watercress sandwiches were traditionally a breakfast item in nineteenth-century Europe. The most basic type of watercress sandwich has two pieces of white bread with a mixture of butter and watercress greens . A nickname(绰号)for the vegetable, in fact, was “poor man’s bread”, because watercress was often eaten on its own for breakfast by families that could not afford the bread to go with it.
Watercress is a member of the mustard(芥菜) family. It contains vitamins C(66mg per 100g), K and A, and is also a valuable source of minerals such as iron, potassium, copper and calcium. The mustard oils in its silky leaves and stems(茎)contain an ingredient known as PEITC. Recent research has proved that PEITC can prevent the growth of cancer cells and, in some cases, actually destroy them.
The best watercress has silky green leaves without any marks and has undamaged stems, The older the plant, the darker are its leaves and the thicker its stems. This means a higher concentration of oils and vitamins. Young watercress, on the other hand, may be harvested after only twenty-eight days growth and has a milder taste. It is best to eat watercress fresh and raw , to keep more of its valuable nutrients, but it can be lightly cooked and used as an alternative to spinach—another dark green vegetable—in various recipes. From soups to salads, watercress is now considered around the world as a natural and healthy super food.
小题1:From paragraph 1, we can learn that________.
| A．watercress is usually grown in wet areas |
| B．the ancient Greeks only used watercress for medicine |
| C．watercress is the most ancient vegetable known to man |
| D．the Romans rubbed watercress on their heads to cure baldness |
| A．butter | B．watercress | C．breakfast | D．bread |
A.It belongs to the same family as spinach.
B.It contains mustard oils only in leaves.
C.It can help guard against cancer.
D.It is rich in vitamins C and B.
小题4:Compared with older watercress, young watercress .
| A．has lighter green leaves |
| B．contains more minerals |
| C．is better for medical use |
| D．is more suitable for eating raw |
| A．The history of watercress | B．watrcress, a medicinal plant |
| C．Watercress, the amazing food | D．New findings about watercress |
最新试题
- 1. I told your friend how to get to the hotel, but perhaps I
- 2陈明同学将冰和盐的混合物放入搪瓷杯里，盖紧杯盖，过一会儿，观察发现搪瓷杯的外面，覆盖着一层薄薄的固体物质，如图所示．（1
- 3--- Why not stay here a little longer? --- _____, but I real
- 4环境承载力是指[ ]A．环境能持续供养的人口数量B．衡量人口数量的重要指标C．制约经济发展的主要指标D．环境所能
- 5 --- ____________is it from your school to the park? --- 30
- 6某商店用2000元购进一批电动玩具，面市后发现供不应求，该商店又购进第二批同样的玩具，所购数量是第一次所购数量的3倍，但
- 7折射率的直角玻璃三棱镜截面如图所示，一束单色光从AB面入射，入射角为i(图中未标出)，ab为其折射光线，ab与AB面的夹
- 8阅读材料，回答6～7题。标绘树木基于可以整体考察树木年轮序列，进而可以确定树木生长期内极端或异常事件。图4示意对三棵树木
- 9下列关于生态系统物质循环和能量流动的叙述，正确的是[ ]A．无机环境中的物质可以被生物群落反复利用B．物质循环和
- 102012年10月9日，国务院新闻办公室发表了《中国的司法改革》白皮书。白皮书第三章详细介绍了中国把加强人权保障作为司法改
热门考点
- 1已知椭圆x2a2+y2b2=1(a＞b＞0)的离心率为35，若将这个椭圆绕着它的右焦点按逆时针方向旋转π2后，所得新椭圆
- 2合肥市委、市政府主要领导把自己的信箱、联系电话公布在服务中心门口 , 随时接受监督。这一措施 ( )①扩大了公民政治参与
- 3The reason why people carry umbrellas in hot summer days is
- 4下列有关沉淀溶解平衡的说法正确的是（ ）A．Ksp（AB2）小于Ksp（CD），则AB2的溶解度小于CD的溶解度B．在
- 5鉴别二氧化碳和氧气，下列试剂或方法不可行的是（ ）A．澄清石灰水B．燃着的木条C．紫色石蕊试液D．闻气体的味道
- 6（1）x+5=0，x=______．（2）10x+3=8，x=______m．（3）6x-12=1，x=______．（
- 7如图，在半径为4的⊙O中，AB，CD是两条直径，M是OB的中点，CM的延长线交⊙O于点E，设DE=a(a＞0)，EM=x
- 8三角形在方格纸中的位置如图所示，则tan α的值是[ ]A．B．C．D．
- 9Sandy is a real book lover and she often brings home many bo
- 10阅读下面的文言文，完成问题。 魏节乳母者，魏公子之乳母。秦攻魏，破之，***魏王瑕，诛诸公子，而一公子不得，令魏国曰：“得