Europe’s deadly outbreak of a rare form of E. coli bacteria (大肠杆菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(肠) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.
【小题1】What is the main topic of the text?
| A．Bacteria. | B．A high-tech scanner. | C．A camera | D．Food safety. |
| A．broke out all over the world | B．comes from soil or animal waste |
| C．is extremely harmful to health | D．does not cause illness |
| A．can help to sort out different fruits |
| B．make the produce appeal to shoppers |
| C．can only capture images of the whole apple |
| D．can identify the presence of contaminants |
| A．The scanner needs to be improved. |
| B．The scanner will be available in the next several years. |
| C．Moon Kim is unwilling to develop the scanner. |
| D．The scanner is connected to a sorting machine. |
【小题1】B
【小题2】B
【小题3】D
【小题4】A
解析试题分析：本文主要叙述了在欧洲爆发大肠杆菌的感染给人们的健康带来了很大的危害。科学家发明出一种扫描仪来识别致污物的存在，详细描述了这样仪器的特点和需要改进的地方。
【小题1】B 主旨大意题。文章中主要提及了在欧洲爆发的E. coli bacteria (大肠杆菌)的感染给人们的健康带来了很大的危害。科学家发明出一种扫描仪来识别致污物 的存在，接下来就分析了这一扫描仪的具体情况。故B正确。
【小题2】B 细节题。根据文章第3段第2行The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce.可知大肠杆菌主要来自土壤和动物粪便。故B正确。
【小题3】D 细节题。根据文章第3段1,2行Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce可知这一扫描仪可以识别出大肠杆菌)的存在。故D正确。
【小题4】A 推理题。根据文章最后3行The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.可知这个扫描仪还有一些需要改进的地方。故A正确。
考点：考察科普类短文阅读
同步练习强化拓展系列答案科目：高中英语 来源： 题型：阅读理解
Air pollution is one of the hottest topics at present because poor air quality is an important factor in both the incidence and cause of respiratory(呼吸道) diseases.
Zhong Nanshan, a deputy to the NPC and a member of the CAE, said recently when the concentration of PM2.5 rises by 10 micrograms per cubic meter, hospitalization may rise by as much as 3.1 percent. Meanwhile, when the concentration of PM2.5 rises from 25 mgs per cubic meter to 200, the average daily death rate may rise to 11 percent.
Zhi Xiuyi, a leading expert in lung cancer treatment and also vice-president of the CATS, said medical authorities used to focus on tobacco control as a primary means of preventing lung cancer. "But in fact, air pollution is no less harmful than smoking and our research team released a report earlier this year showing that the cancer rate in Beijing is closely related to industrialization," he said.
The report, conducted by the Beijing Institute of Cancer Research, shows that the number of cancer patients in China has increased markedly during the past ten years. Chaoyang District, the city's main area of industrialization, has the highest incidence of cancer, almost double that of Yanqing, an area on the outskirts of the city. About four out of 1000 Chaoyang residents have some form of the disease, with lung cancer at the top of the list.
"The risk of having cancer largely depends on the length of exposure and the concentration of noxious gases(有毒气体的浓度)," said Zhi. In response to the doubt whether seven years' exposure to poor air quality will almost result in cancer, Zhi said the time scale was taken from research overseas that suggested the rate of incidence generally peaked in the seventh year of exposure to a heavily polluted environment.
【小题1】 What is the passage mainly about?
| A．Medical researches on environment. |
| B．The disadvantages in big cities. |
| C．The only reason for the lung cancer. |
| D．Poor air quality contributing to lung cancer. |
| A．Compared with smoking, air pollution is more harmful. |
| B．Air pollution is as harmful as smoking. |
| C．It is very important to prevent people from smoking. |
| D．People realize the importance of keeping healthy. |
| A．16000 | B．12000 | C．8000 | D．7500 |
| A．Industrialization has its weakness as well as strengths. |
| B．The average death rate rises with different ages and places. |
| C．The air in Beijing is much more polluted than that in the other cities. |
| D．The more heavily-polluted air you breathe in, the sooner you’ll have cancer. |
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科目：高中英语 来源： 题型：阅读理解
Chinese parents are very generous when it comes to educating their children. Not caring about the money, parents often send their children to the best schools or even abroad to England, the United States or Australia. They also want their children to take extra-course activities where they will either learn a musical instrument or ballet, or other classes that will give them a head start in life. The Chinese believe that the more expensive an education is, the better it is. So parents will spend an unreasonable amount of money on education. Even poor couples will buy a computer for their son or daughter.
However, what most parents fail to see is that the best early education they can give their children is usually very cheap.
Parents can see that their children’s skills vary, skilled in some areas while poor in others. What most parents fail to realize, though, is that today’s children lack self-respect and self-confidence.
The problem is that parents are only educating their children on how to take multiple-choice tests and how to study well, but parents are not teaching them the most important skills they need to be confident, happy and clever.
Parents can achieve this by teaching practical skills like cooking, sewing and doing other housework.
Teaching a child to cook will improve many of the skills that he will need later in life. Cooking demands patience and time. It is an enjoyable but difficult experience. A good cook always tries to improve his cooking, so he will learn to work hard and gradually finish his job successfully. His result, a well-cooked dinner, will give him much satisfaction and a lot of self-confidence.
Some old machines, such as a broken radio or TV set that you give your child to play with will make him curious and arouse his interest. He will spend hours looking at them,tying to fix them ,your child might become an engineer when he grows up. These activities are not only teaching a child to read a book, but rather to think, to use his mind. And that is more important.
【小题1】Parents in China according to this passage .
| A．are too strict with their children |
| B．are too rich to educate their children |
| C．have some problems in educating their children correctly |
| D．have no problems in educating their children strictly |
| A．the parents’ ideas of educating their children |
| B．the education system of the school |
| C．children’s skills in cooking at home |
| D．children’s hobbies in the classroom |
| A．learn how to serve their parents |
| B．learn how to become strong and fat |
| C．get a lot from it and prepare themselves for the future |
| D．make their parents believe that they are clever |
| A．broken radios and television sets are useful |
| B．one’s interest and curiosity may be useful for his later life |
| C．an engineer must fix many broken radios |
| D．a good student should spend much time repairing radios |
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科目：高中英语 来源： 题型：阅读理解
(2013·高考浙江卷，C)The baby monkey is much more developed at birth than the human baby.Almost from the moment it is born，the baby monkey can move around and hold tightly to its mother.During the first few days of its life the baby will approach and hold onto almost any large，warm，and soft object in its environment，particularly if that object also gives it milk.After a week or so，however，the baby monkey begins to avoid newcomers and focuses its attentions on“mother”—the real mother or the mothersubstitute(母亲替代物)．
During the first two weeks of its life warmth is perhaps the most important psychological(心理的)thing that a monkey mother has to give to its baby.The Harlows，a couple who are both psychologists，discovered this fact by offering baby monkeys a choice of two types of mothersubstitutes—one covered with cloth and one made of bare wire.If the two artificial mothers were both the same temperature，the little monkeys always preferred the cloth mother.However，if the wire model was heated，while the cloth model was cool，for the first two weeks after birth the baby monkeys picked the warm wire mothersubstitutes as their favorites.Thereafter they switched and spent most of their time on the more comfortable cloth mother.
Why is cloth preferable to bare wire？Something that the Harlows called contact(接触)comfort seems to be the answer，and a most powerful influence it is.Baby monkeys spend much of their time rubbing against their mothers’ skins，putting themselves in as close contact with the parent as they can.Whenever the young animal is frightened，disturbed，or annoyed，it typically rushes to its mother and rubs itself against her body.Wire doesn’t “rub” as well as does soft cloth.Prolonged(长时间的)“contact comfort” with a cloth mother appears to give the babies confidence and is much more rewarding to them than is either warmth or milk.
According to the Harlows，the basic quality of a baby’s love for its mother is trust.If the baby is put into an unfamiliar playroom without its mother，the baby ignores the toys no matter how interesting they might be.It screams in terror and curls up into a furry little ball.If its cloth mother is now introduced into the playroom，the baby rushes to it and holds onto it for dear life.After a few minutes of contact comfort，it obviously begins to feel more secure.It then climbs down from the mothersubstitute and begins to explore the toys，but often rushes back for a deep embrace(拥抱)as if to make sure that its mother is still there and that all is well.Bit by bit its fears of the new environment are gone and it spends more and more time playing with the toys and less and less time holding onto its “mother”．
【小题1】Psychologically，what does the baby monkey desire most during the first two weeks of its life?
| A．Warmth. | B．Milk. |
| C．Contact. | D．Trust. |
| A．larger in size |
| B．closer to them |
| C．less frightening and less disturbing |
| D．more comfortable to rub against |
| A．Attention. | B．Softness. |
| C．Confidence. | D．Interest. |
| A．it frequently rushes back for a deep embrace when exploring the toys |
| B．it spends more time screaming to get rewards |
| C．it is less attracted to the toys though they are interesting |
| D．it cares less about whether its mother is still around |
| A．give the reasons for the experiment |
| B．present the findings of the experiment |
| C．introduce the method of the experiment |
| D．describe the process of the experiment |
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科目：高中英语 来源： 题型：阅读理解
Yawning sends out certain messages -either “Oh ，this movie is so boring” or “I probably need to get some sleep”. But did you know that a yawn can also help your brain to cool down when it is overheated?
A new study, led by a research team at Princeton University, has indicated that yawning could be the brain’s natural way of regulating temperature. People yawn more often when the temperature outdoors is lower than their body temperature but are less likely to yawn when it is hotter outdoors, according to Sciencedaily. com.
The research team did an experiment on 160 people, 80 in summer and 80 in winter, to examine how often they yawned at different air temperatures. The study found that people yawned more often in winter than in summer. Scientists say that when the air temperature is lower outside the body, there is heat exchange between the overheated brain and the cool air. But when the air temperature is higher than or equal to the body, people are less likely to yawn because the hot air they breathe in will make the brain even hotter.
When people yawn, their jaw is also stretched ，which increases blood flow and may also help cool the brain
The study showed that the amount someone yawned could be related to the amount of time they spent outside. The longer they spent outside in summer, the less they yawned. Nearly 40 percent of participants yawned within their first five minutes outside, but after that the percentage was reduced to less than 10 percent.
However, the result was the opposite in winter. The number of people who yawned increased when they spent more than five minutes outdoors. But the change was only slight compared to summertime.
According to Gallup, this is the first report to show that yawning frequencies change depending on season. This could help us to understand better the way our brains work. It may also help us understand the reason why frequent yawning can sometimes be a sign of brain disease.
【小题1】The purpose of the experiment is ______.
| A． to prove people yawn in winter and in summer equally |
| B． to indicate brain can regulate temperature naturally |
| C． to find the frequency of people’s yawning |
| D． to show the real reason why people yawn |
| A． longer outdoor summertime results in more yawns |
| B． yawning frequency changes with outdoor time |
| C． yawning frequency increases with outdoor time |
| D． longer outdoor wintertime leads to fewer yawns |
| A． Yawning Is A Sign of Brain Disease |
| B． Yawning Carries Some Information |
| C． Yawning Benefits Your Body |
| D． Yawning Cools Your Brain |
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科目：高中英语 来源： 题型：阅读理解
Fear is an emotion like others such as happiness, anger, hurt, sadness. We need emotions to process information we receive and decide how to respond. Being afraid of fast cars, for example, is something that might protect us from harm. Being afraid of the consequence of a choice may prevent us getting into trouble.
Fears in young children commonly center on certain animals like snakes or big dogs. Fears are caused often because of experiences or ideas expressed by others, and at times, the media. Many normal fears during the early years, like men with beards, or large dogs, disappear with age. Those relating to personal failure and ridicule (嘲笑) remain through adulthood and may need special help to overcome.
Children’s fears are often trivial, but that doesn’t mean they should be ignored. They need to be recognized and accepted as real for that child. Only when we help children understand their fears can they grow normally in their ability to deal with them.
Research shows that as a child grows up, the center of his fears changes a lot. Things like divorce, a teacher who “shouted at me”, people with guns, bullies, big boys, or “making fun of me” top the list of childhood fears.
We can not always prevent these experiences from happening, but it’s essential that children be allowed to freely express their emotions without judgment. Sympathy and a caring listener will help ease the pain of these fears. Read books and stories to your child about children who have experienced similar fears. This helps children talk about their fears and find ways to cope. With all emotions, fears become less of a problem for children as they gain self-confidence and they find that fear is normal and can be dealt with.
【小题1】According to Paragraph 2, we can know that fears in young children_______. .
| A．only center on frightening animals | B．are not born but learned |
| C．can make sure of their safety | D．need special help to deal with |
| A．small | B．serious | C．harmful | D．common |
| A．stop unpleasant experiences happening to children |
| B．let children know about the nature of fear |
| C．create an environment where there is nothing to fear |
| D．develop children’s ability to treat their fear on their own |
| A．some childhood fears may have a lasting influence |
| B．children should avoid the media to reduce their fear |
| C．fears can be judged according to the environment |
| D．children with similar fears can communicate easily |
| A．How to Overcome Children’s Fears | B．Children’s Fears |
| C．The kind of Children’s Fears | D．The Bad Effects of Fears |
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科目：高中英语 来源： 题型：阅读理解
China is going green. In order to reduce air pollution and oil shortages, automobile manufacturers have announced their plans to develop hybrid vehicles (混合燃料汽车) for the Chinese market. Toyota's hybrid car Prius will be ready to drive in China this week. Let's have a look at the new car.
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. |
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科目：高中英语 来源： 题型：阅读理解
Everyone has got two personalities-the one that is shown to the world and the other that is secret and real. You don’t show your secret personality when you’re awake because you can control your behavior, but when you’re asleep, your sleeping position shows the real you. In a normal night, of course, people frequently change their positions. The important position is the one that you go to sleep in.
If you go to sleep on your back, you’re a very open person. You normally trust people and you are easily influenced by fashion or new ideas. You don’t like to displease people. So you never express your real feelings. You’re quite shy and you aren’t quite sure of yourself.
If you sleep on your stomach, you are a rather secretive person. You worry a lot and you’re always easily upset. You always stick to your own opinions or judgment, but you don’t raise your hopes too much. You usually live for today not tomorrow. This means that you enjoy having a good time.
If you sleep curled up, you are probably a very nervous person. You have a low opinion of yourself and so you’re often defensive. You’re shy and you don’t normally like meeting people. You prefer to be on your own. You’re easily hurt.
If you sleep on your side, you have usually got a well—balanced personality. You know your strengths and weakness. You’re usually careful. You believe in yourself. You sometimes feel anxious, but you don’t often get sad. You always insist on what you think even if it makes people rather angry.
【小题1】According to the passage, a person, who is not willing to change his mind and hard to deal with, probably sleeps .
| A．on his side | B．on his back | C．curled up | D．on his stomach |
| A．do things personally. | B．stay alone |
| C．keep things secret | D．trust others easily |
| A．The people sleeping on their stomachs and those sleeping on his backs. |
| B．The people sleeping on their sides and those sleeping curled up. |
| C．The people sleeping on their backs and those sleeping on their sides. |
| D．The people sleeping curled up and those sleeping on their stomach. |
| A．one’s sleeping position has something to do with one’s character. |
| B．everyone has got both real and secret personalities. |
| C．the position in which one goes to sleep is the most important one. |
| D．when awake, one does not show one’s secret personality. |
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科目：高中英语 来源： 题型：阅读理解
Kids at the Interlake School Division were the first Canadian students to take part in a program to send experiments to the International Space Station.(ISS).
Jordan Schott and three other sixth grade students came up with the idea to test royal jelly(蜂王浆) in space . Their experiment came very close to be tested on the space station. “We were seeing if we could send it to space, and if it would lose its nutritional value” faster and or slower, ”said Schott. Schott is one of the 18 students in the Space Knights Club at Woodlands Elementary School, part of the Interlake School Division. Over 450 students from the Division took part in the program.
“I thought we were just students and we couldn’t do much in the way of that. It’s a way to communicate with people up there ,” said Braeden Clark, a seventh grade student who is also in the club.
The astronauts shared what they learned with their school with a full day of activities all about science and space.
Teacher Maria Nickel is the organizer of the club. She said the day was great for students to learn what they could do. “Space is one of those great things that get kids excited, but it also gives them the chance to do so much. They can be an astronaut; they can be an engineer, ”She said.
The day was held in honour of Chris Hadfield, a Canadian astronaut now in the Internal Space Station. “It gives kids someone more to look up to. Here’s a real hero to look up to who’s doing it all, doing it through education,” said Nickel.
Jordan Schott thinks it’s really cool. “To me it seems so cool how people can go up to space, and science is something I’ve always liked,” She said. Schott says she wants to follow in the footsteps of Hadfield and be an astronaut when she gets older.
One of the winning experiments in the competition was produced by students from Argyle, Manitoba. It will travel to the space station in the fall of 2013.
【小题1】The program at the Interlake School Division________-
| A．was carried out by 18 students. |
| B．was to test royal jelly in space |
| C．was designed to send experiments to the ISS |
| D．allowed the first students to connect with the ISS |
| A．thinks it’s cool to live in the ISS |
| B．encourages students to be astronauts |
| C．helps students develop their interest in space |
| D．thinks Chris Hadfield sets a good example to the students |
| A．She is seventh grader |
| B．She dreams of being an engineer |
| C．She respects Chris Hadfield very much |
| D．She didn’t like science when she was young |
| A．Kids carry out experiments for the ISS. |
| B．Winners of competitions travel to the ISS. |
| C．Astronauts do activities together with students |
| D．Interlake School Division trains students to be astronauts. |
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