题目
题型：不详难度：来源：
Carbon monoxide is called the silent killer because people do not know it is in the air. The gas has no color, no taste and no smell. It does not cause burning eyes. And it does not cause people to cough. Yet, carbon monoxide gas is very deadly (致命的). It steals the body’s ability to use oxygen.
Carbon monoxide makes it difficult for the blood to carry oxygen to body tissues (血管). It does this by linking with the blood. When the gas links with the blood, the blood is no longer able to carry oxygen to the tissues that need it. Damage (损害) to the body can begin very quickly from large amounts (数量) of carbon monoxide.
How quickly this can happen depend on how long a person is breathing the gas and how much gas he or she breathes in.
Carbon monoxide poisoning has warning signs(标志). But people have to be awake to realize them. Small amounts of the gas will cause a person’s head to hurt. He or she may begin to feel tired. Their stomachs may feel sick. The room may appear to be turning around. The person may have trouble thinking clearly.
People develop serious headache as the amount of the gas continues to enter their blood. They will begin to feel very tired and sleepy. They may have terrible stomachache.
Doctors say carbon monoxide influences people differently. For example a small child will experience health problems or die much sooner than an adult. The general health of the person or his or her age can also be important.
小题1:The damage of carbon monoxide to the body has something to do with _____.
| A．the amount a person breathes in |
| B．whether a person is healthy |
| C．how many signs a person finds |
| D．ages of people |
| A．burning eyes | B．bad cough |
| C．serious headache | D．high fever |
| A．Carbon monoxide poisoning seldom happens in cold areas. |
| B．Twenty thousand Americans are killed by carbon monoxide each year. |
| C．Most people know whether there is carbon monoxide in the air. |
| D．Carbon monoxide stops the blood from carrying oxygen to body tissues. |
| A．Warning signs that carbon monoxide poisoning has. |
| B．Reasons why carbon monoxide can cause person’s death. |
| C．The damage of carbon monoxide and how it works. |
| D．Influences of carbon monoxide on children and adults. |
答案
小题1:A
小题2:C
小题3:D
小题4:C
解析
小题1:根据文章内容Damage (损害) to the body can begin very quickly from large amounts (数量) of carbon monoxide.How quickly this can happen depend on how long a person is breathing the gas and how much gas he or she breathes in.可知答案为A
小题2:根据文章内容可知答案为C
小题3:根据文章内容答语可知答案为D
小题4:根据文章内容大意可知答案为C
核心考点
试题【Carbon monoxide poisoning (一氧化碳中毒) causes death and injuries around the world. T】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
Scientists from American University looked at the eating behavior of 54 kids between the ages of 2 and 6. At snack time, the scientist watched the amount of food each child ate while they were in groups of either three or nine. According to the study, the more children there are in a group, the more likely they are to eat more. Those in the larger group ate nearly 30 percent more than those in the smaller group, and they actually ate faster.
Since this is the first such study in children, scientists are quick to point out the importance of encouraging healthy habits in kids as early as possible.
“If you know kids eat more in large groups, it seems perfect to use this information to keep snack groups small or use small tables,” says Dr. Jana Klauer, an expert in New York.
Smaller groups would allow for a quiet and more relaxing environment-a perfect chance to teach children about food, manners and how to know when they feel full. “This would have an effect on kids" eating,” adds Klauer. “They would slow down and eat less.”
小题1:How many times have the scientists done such study according to the passage?
| A．Once | B．Twice | C．Three times | D．Many times |
| A．健康 | B．肥胖 | C．瘦弱 | D．服从 |
| A．Because children in smaller groups eat faster. |
| B．Because children in smaller groups don"t like eating. |
| C．Because children in smaller groups don"t know about food. |
| D．Because children in smaller groups eat slowly and eat less. |
| A．Snack Time | B．Different Groups |
| C．Eating More | D．Food for Kids |
Now, China has more than 162 million Internet users, according to the China Internet Network Information Centre. This is the second highest number of user in the world after the United States. Today, 66%of Chinese “netizens （网民）” are teenagers. “They spend about thirteen hours every week online,” said Qian Hulin, an Internet expert(专家). Doctor Song in Beijing Xuanwu Hospital said about 14% of Chinese netizens who are teens often lasted over ten hours to play online games.
The main reasons why teenagers surf the Web are to search for information, to communicate with others and to have fun. On the Internet, teenagers can find out almost anything. And surfing the Web can help students with their homework and widen their knowledge.
Li Dong, a teacher at No. 41 Middle School in Shijiazhuang, likes her students to use the Internet. “When we talk in class, students who surf the Net usually know more background information than the others,” she said.
In addition, people can use the Internet to write letters or stories and send e-mails. Many teens keep in touch with their friends online. It is cheaper than phoning somebody far away and also much quicker.
小题1:_______ has the most Internet users in the world according to the article.
| A．China | B．America | C．Canada | D．Russia |
| A．107 million old | B．22.7 million old |
| C．107 million young | D．22.7 million young |
| A．playing online games |
| B．searching for information |
| C．chatting with their friends |
| D．sending e-mails to others |
______.
| A．thinks surfing the net can help students spend less time on homework |
| B．thinks her students can get more background information than the others |
| C．wants her students to talk to her about their hobbies and interests |
| D．wants to know what her students do and think about at home |
| A．Giving them a call. |
| B．Going to see them. |
| C．Writing a letter to them. |
| D．Sending e-mails to them. |
Since the beginning of history, people have used rivers for transportation. The longest one in the United States is the Mississippi. The lifeline of Egypt is the Nile. To the people of India, the Ganges is great, but it is also important for transportation; ships can travel along it for a thousand miles. Other great rivers are the Congo in Africa and the Mekong in southeastern Asia. The greatest of all for navigation（航海）, however, is the Amazon in Brazil（巴西）. It is so wide and so deep that large ships can go about two thousand miles up it.
Besides transportation, rivers give food to eat, water to drink, water for crops, and chances for fun. In order to increase the supply(供给) of water for crops, engineers sometimes build a dam (大坝)across a river and let a lake form behind the dam. Then people can use the water not only to irrigate(灌溉) their fields but also to make electricity for their homes and industries.
However, large cities and industries that are located on rivers often cause problems. As the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the importance, however, of doing more to keep their rivers clean if they want to enjoy the benefits of these natural resources.
小题1:The greatest river for navigation is ________________.
| A．the Mississippi | B．the Nile |
| C．the Mekong | D．the Amazon |
| A．Many cities are located on rivers. |
| B．Almost every country has at least one important river. |
| C．The Nile is in India. |
| D．Rivers play an important part in the lives of people. |
| A．keeping the rivers clean |
| B．making electricity |
| C．washing clothes |
| D．irrigation and the production of electricity |
| A．people’s drinking water too much |
| B．people’s swimming in the river too much |
| C．chemicals and other materials |
| D．people’s building a dam across a river |
| A．The Importance of Rivers | B．Rivers in Cities |
| C．Transportation | D．Natural Resources |
We were about to go back for class again when the headmaster called us 42_____ and said, “ I’ve got little 43_______ for you boys. Mrs Smith has just lost her watch on the playground. This kind of thing has happened 44______”.She said, “It just falls off her wrist (手腕).So, look around for it, will you? 45______ if you’re clever enough to find it. You will get a big reward(奖赏)”
At once we started looking for the watch. Everybody wished to be the 46____ one. Suddenly, Jim stopped and bent(弯)down as if to 47_____ something. And 48_______ he was in front of Mrs Smith, all smiles, 49______ the watch to her.
Mrs Smith, however, didn’t seem 50______ at all. In fact, she looked angry. She took the watch without 51______a “Thank you.”
Jim got his reward—a large piece of paper from the headmaster. He 52______Jim to write a composition 53______ the dangers of smoking. What could 54______ Jim write about? He hadn’t listened to the lecture and had nothing to say on the 55_____.
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Often parents know what their children want. Cath, a mother of three children, told us, “My children have packed lunches because they say they don’t like to have school dinners. So I make three packed lunches every morning.”
However, another mother, Susan, made a different choice. She said, “My daughters have a always had school dinners. I think they probably get healthier food at school than a few sandwiches I make for them.”
But how healthy are school dinners? Kaz, a father, thought poorly of them. He said, “Fizzy(起泡的) drinks were offered and I think there were a lot of chips.”
Jamie Oliver spent a year working in a school kitchen. He was worried about the unhealthy food which included burgers, pizzas and chips. So he tried to cook healthy food such as good stews and curries for the children instead.
So Jamie improved the school dinners, and trained the dinner ladies to cook healthy food in that school. Then he advised the government to improve school food across the country. And it seems that the changes have begun.
Anna, a pupil, told us, “We used to have a fast food window where you got chips and coke, but they stopped that this year. There’s a salad restaurant, which is good, so it’s healthier than it was.”
根据材料内容选择最佳答案，并将其标号填入前括号内。
小题1:How many meals do most children in the UK have at school?
| A．One | B．Two | C．Three | D．Four |
| A．Cath | B．Susan | C．Kaz | D．Jamie |
| A．stews and curries | B．burgers and pizzas |
| C．chips and fizzy drinks | D．sandwiches and coke |
| A．there’s a salad restaurant in every school |
| B．salad is the only healthy food for students |
| C．schools have begun to cook healthier food |
| D．the government doesn’t care about school dinners |
| A．Healthy Food | B．Unhealthy Food |
| C．Packed Lunches | D．School Dinners |
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