题目
题型：不详难度：来源：
ting oceans, killing wildlife and getting dumped in landfills where they take up to 1,000 years to decompose. Researchers have been unsuccessfully looking for a solution.The 16-year-old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute, has-discovered a way to make plastic bags degrade(降解) in as few as 3 months, a finding that won him first prize at the Canada Wide Science Fair, a ＄10,000 prize, a ＄20,000 scholarship, and a chance to revolutionize a major environmental issue.
Burd’s strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms (微生物). If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions.
With this goal in mind, he grounded plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growth. Then he added the plastic powder and let the microbes work their magic for 3 months. Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control. Sure enough, the plastic exposed to the live bacteria was 17% lighter than the control after six weeks.
The inputs are cheap, maintaining the required temperature takes little energy because microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.
“Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of me. One day, I got tired of it and I wanted to know what other people are doing with these plastic bags. The answer: not much. So I decided to do something myself.” Said Daniel Burd.
小题1:Daniel Burd won first prize at the Canada Wide Science Fair because .
| A．he found a new kind of microorganism |
B．he contributed much to environmental protection |
C．he found a way to degrad e plastics in shorter time |
| D．he could encourage microbe growth in an easier way |
acteria to .| A．make the live bacteria work better | B．test how effective his method was |
| C．know which bacteria worked faster | D．control the temperature in the process |
Maintaining the required temperature takes little energy because .
| A．plastics can get hot easily | B．microbes can produce heat themselves |
| C．much carbon dioxide is produced | D．the temperature can be controlled |
| A．his school textbook | B．the failure of researchers |
| C．his everyday work | D．the practice of other people |
答案
解析
核心考点
试题【We produce 500 billion of plastic bags in a year worldwide and they are thrown a】；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 past, the publishing industry maintained the rights of libraries to freely provide published materials on the condition that libraries bought so many of their books. Since the new
electronic publications can ea
sily be copied in their completeness by the library readers, the publishing industry is reconsidering its f
ormer support of the library system. There have even been attempts to stop libraries from delivering digital media.In addition to the reluctant cooperation of the publishing industry, there is the problem that the newer forms of information are much more specialized than those which they replace. Deciding how to transfer already limited resources is increasingly difficult as there are more methods. While a single reference index(索引) might have covered an entire field in the past, now there are frequently several specialized indexes available in electronic form. Above all, in order to continue to make use of the newer technology, libraries must decide which kinds of material are most useful to the majority of their readers. There are many different solutions being applied, but only the process of trial and error will help find out the most effective method.
（Note: Answer the questions or complete the statements in NO MORE THAN 20 WORDS）
1. What has been called into question?
2. In the past, publishers cooperate with libraries because ______________.
3. The most important way to use the new technology is to determine ________
4. According to the passage, how can best solutions be found?
As well as a number of small quiet bays, which are ideal for beach barbecues away from the crowds, Torquay has large sandy beaches where you can buy refreshments（饮料）and hire deck chairs, boats and even beach huts. There are large areas of grassland overlooking the sea, and miles of winding cliff paths for walkers who just want to enjoy the scenery and what is often said to be the healthiest air in the country. For the sportsmen and women there are opportunities not only for golf, tennis, squash and bowls, but also for water-skiing, hang-gliding and deep-sea fishing.
After a day in the open air, there’s lots to do in the evenings, too. There are plenty of discos, the occasional opera or ballet, and summer variety shows in the seafront theatres. For the children, there is a beautiful model village with a complicated railway layout which is remarkably realistic-especially when the lights are all on at night.
Of course, there’s no need to spend your whole holidays in Torquay. Only a s
hort drive away is Dartmoor National Park, where you can walk for miles through dramatic, unspoiled countryside, or picnic by beautiful rivers and streams. Or, nearer to home, you can sail across Tor Bay to the lovely old fishing village of Brixham.Torquay seems to have something for everyone. But don’t take my word for it----come and see for yourself.
小题1: Which of the following best explains what “B & B” means on the signs?
| A．Beach and barbecue | B．Breakfast and bath |
| C．Bed and breakfast | D．Beautiful and British |
| A．comfortable and expensive | B．remote and beautiful |
| C．croweded and lively | D．fresh and healthy |
| A．It opens at night. | B．It has a real railway system. |
| C．It’s in the open air. | D．It has something for the children |
| A．To introduce the geography of Torquay to students. |
| B．To make some places known to visitors. |
| C．To show the beauty of resorts. |
| D．To attract more tourists. |
us and real, yet fade away in a short time if situations change. Neither side feels hurt by this. Both may exchange Christmas greetings for a year or two, perhaps a few letters for a while— then no more. If the same two people meet again by chance, even years later, they pick up the friendship where it left off and are delighted.In the States, you can feel free to visit people’s homes, share their holidays, or enjoy their lives without fear that you are taking on a lasting obligation(义务). Do not h
esitate to accept hospitality（好客） because you can’t 
give it in return. No one will expect you to do so for they know you are far from home. Americans will enjoy welcoming you and be pleased if you accept their hospitality easily.Once you arrive there, the welcome will be full and warm and real. Most visitors find themselves readily invited into many homes there. In some countries it is considered inhospitable to entertain at home, offering what is felt as only home—cooked food, not “ doing something for your guest”. It is felt that restaurant entertaining, shows more respect and welcome. Or for other different reasons, such as crowded space, language difficulties, or family custom, outsiders are not invited into homes.
In the United States, both methods are used, but it is often considered more friendly to invite a person to one’s home than to go to a public place, except in purely business relationships. So, if your host or hostess brings you home, do not feel that you are being shown inferior treatment.
Don’t feel neglected if you do not find flowers awaiting you in your hotel room, either. Flowers are very expensive there; hotel delivery is uncertain; arrival times are delayed, changed, or
canceled —— so flowers are not customarily sent as a welcoming touch. Please do not feel unwanted! Outward signs vary in different lands; the inward welcome is what matters, and this will be real.小题1:In the United States, you will find friendships ______ if circumstances change.
| A．die suddenly | B．pass away |
| C．disappear gradually | D．last forever |
| A．ask | B．don’t expect | C．never allow | D．wish |
| A．less friendly | B．less hospitable | C．more natural | D．more popular |
ing is NOT true?| A．Flowers are signs of outward welcome. |
| B．Flowers are expensive. |
| C．Flowers are available at all time. |
D．Flowers are not necessarily sen t to guests. |
Eating out can be fun but many people still like eating at home more because it is healthier. When my dear wife does not prepare foods for me, I would rather cook some instant noodles and eat at home! However, we go out to eat once in a while for holidays or on special occasions.
More and more people want to make healthy food choices nowadays. Some are watching calories, while others want to keep their cholesterol(胆固醇)under control or eat less fat. Plan ahead and choose wisely, you will find foods that fit into your meal plan and make eating out both healthy and enjoyable.
Here are some pointers to remember that can help you make wise choices when eating out: go for balance, watch portion sizes and drink water or low-fat milk. Keep the ground rules of good nutrition in mind. Eat a variety of foods in moderate(适中的)amounts, limit the amount of fat you eat, and watch the amount of salt in food. If you develop the skills to make healthy choices now, your body will thank you later.
Eating out can be one of life"s great pleasures. Make the right choices, ask for what you need, and balance your meals out with healthy meals at home. You can enjoy yourself and take good care of yourself at the same time.
小题1: From the passage, we can infer that often eating out______________ .
| A．contributes to healthy bodies | B．maintains good relations with friends |
| C．is of disadvantage to health | D．saves time from cooking |
| A．he prefers to cook some instant noodles for his wife |
| B．he would like to have a party at home |
| C．he must make an important choice |
| D．he is likely to take his wife to eat out |
| A．people"s awareness of health has improved |
| B．most people are worried about their cholesterol |
| C．calories have caused people"s attention |
| D．it is important to choose your food every day |
| A．you wouldn"t have suffered any disease |
| B．you would be in good health now |
| C．you might have had much experience in life |
| D．you could have cured your illnesses |
I"m afraid I have some very bad news for you. I have been very naughty and the school master is very angry with me. She is going to write to you. You must come and take me away from here. She does not want me in the school any longer. The trouble started last night when I was smoking a cigarette in bed. As I was smoking, I heard footsteps coming towards the room .I did not want a teacher to catch me smoking, so I threw the cigarette away. Unfortunately, the cigarette fell into the waste-paper basket. It caught fire.
There was a curtain near the waste-paper basket. It caught fire too. Soon the whole room was burning. The master phoned the fire brigade. The school is a long way from the town and before the fire brigade arrived, the whole school was on fire. The master said that the fire was all my fault and I must pay for the damage. She will send you a bill for about a million dollars.
I"m very sorry for this.
Much love
Sarah
小题1:Why did Sarah write to his parents?
| A．He missed them very much for they hadn’t seen each other for a long time. |
| B．He told his parents what he had done in school. |
| C．He was tired of studying, and wanted to leave school. |
D．He thought he was old enough to help the m do something. |
| A．In the classroom | B．In the Dinning hall |
| C．In the street | D．In the dormitory |
| A．Because he was too naughty |
| B．Because he was too lazy |
| C．Because he caused a big fire |
| D．Because he stole something from the school |
| A．They should not smoke, because smoking is dangerous to them |
| B．They should not dance, because dancing would waste a lot of money |
| C．They should not make friends, because making friends would take them absent |
| D．They should not wear expensive clothes because they would waste a lot of money |
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