题目
题型：不详难度：来源：
A study by the Health Protection Agency (HPA) found that some eco-friendly lightbuulbs release levels of ultraviolet (UV) (紫外线) radiation that are above recognized safety limits. The agency urged people who work with lamps nearby to avoid spending more than one hour within a foot of the eco-friendly bulbs. The warning was directed at those using desk lamps for long periods, such as jewellery makers, and others who might have lights close to their faces, such as car mechanics.
John O’Hagan, a scientist at the HPA’s centre for radiation, chemical and environmental dangers, began tests on the ligthbulbs after patient groups raised concern about them. Among the groups were patients with a skin disease called lupus, which makes people highly sensitive to light.
The tests measured UV light from the lamps and found the highest levels of UV radiation, measured 2cm from the lightbulbs, were equivalent to being outside in direct sunlight in the summer. The most immediate risk from the lightbulbs is a reddening of the skin similar to sunburn, but there is also a small increased risk of skin cancer associated with this, again similar to that of sunburn.
The risk of health problems from the lightbulbs was not so high that people should remove them from their homes. People are advised to avoid using open lightbulbs for long close work until the problem is sorted out. It has confirmed that the government will not be reviewing its strategy on introducing energy efficient lightbulbs.
小题1:The underlined word “equivalent” in paragraph 4 most probably means ______.
| A．equal | B．vital | C．relevant | D．harmful |
| A．stop using eco-friendly lightbulbs at home |
| B．avoid using open lightbulbs for long close work |
| C．take care not to expose their skin to direct sunlight |
| D．urge the government to ban the use of lightbulbs |
| A．why people needn’t remove the lightbulbs from their homes |
| B．how researchers have planned to sort out the problem |
| C．how the government has responded to HPA’s discovery |
| D．how long people should work close to the open lightbulbs |
| A．health officials issued a warning over common lightbulbs. |
| B．jewellery makers should avoid working with the eco-friendly bulbs for more than one hour |
| C．John O’Hagan did tests on the lightbulbs with some patients |
| D．people are advised to avoid using open lightbulbs for long close work |
答案
小题1:A
小题1:B
小题1:C
小题1:D
解析
核心考点
试题【Health officials issued a waring over common energy-saving l一ghtbulbs(灯泡) after 】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
When you move, when you feel the weight of your arms and legs and the natural resistance of the objects around you, the “felt” image of yourself starts to become clearer. It is almost as if it were created by your own actions and the feelings they cause.
The image you create for yourself has rather strange proportions（部分）; certain parts feel much larger than they look. If you get a hole in one of your teeth, it feels enormous; you are often surprised by how small it looks when you inspect it in the mirror.
Although the “felt” image may not have the shape you see in the mirror, it is much more important. It is the image through which you recognize your physical existence in the world. In spite of its strange proportions, it is all one piece, and since it has a consistent(前后一致的) right and left and atop and bottom, it allows you to locate new feelings when they occur. It allows you to find your nose in the dark and point to a pain.
If the felt image is damaged for any reason—if it is cut in half or lost as it often is after certain strokes （中风）which wipe out recognition of one entire side –these tasks become almost impossible. What is more, it becomes hard to make sense of one’s own visual appearance. If one half of the “felt” image is wiped out or injured, the patient stops recognizing the affected part of his body. It is hard for him to find the location of feelings on that side, and, although he feels the doctor’s touch, he locates it as being on the undamaged side.
小题1:According to the passage the “felt” image the mirror image.
| A．is precisely the same as | B．is as clear as |
| C．often differens from | D．is always much smaller than |
| A．The felt Image is much more important because it helps you locate new feelings. |
| B．When you are in bed with your eyes closed, it is not easy to imagine your image. |
| C．When you move, the “felt” image of yourself starts to become clearer. |
| D．The “felt” image is not so important as the mirror image. |
| A．he can’t locate the doctor’s touch on his left side |
| B．he can’t locate the doctor’s touch on his right side |
| C．he loses his sense of touch on the left side |
| D．he loses feeling on both sides |
| A．Stroke victims’“felt” images | B．Stroke victims’ mirror images. |
| C．The importance of “felt” images | D．The importance of mirror images. |
Exercise and food affect growing speed in young lab animals．Baby mice start running as soon as they are big enough to use an exercise wheel in their cage．If they get extra food and run a lot，they will grow as much as 1.5 times bigger than normal．
The same differences in growing speed might be found between active and inactive children．Physical exercise helps active children grow faster than inactive children．One experiment shows that the brains of the mice that had enough exercise weighed about 3％more than those of the mice that did not exercise The mice that exercised are much quicker to learn doing new exercise than the mice that did not exercise．
The results of the experiments suppose the theory that exercise can help babies learn to talk and walk sooner than expected．
The good effects of physical exercise are not limited to children and middle-aged people．Exercise continues to be an important part of our lives after we grow old．For example，people over 50 years old begin to lose calcium(钙) from their bones，which get weaker and can break easily．Physical exercise，however，helps to strengthen the bones and to prevent them from losing calcium．Of course，old people can take medicines to prevent themselves from suffering from losing calcium．But the medicines they take increase the chance of developing some kind of cancer(癌)．So physical exercise is a much safer treatment(治疗)．
小题1:From the passage we know that .
| A．mice need to eat more and exercise more |
| B．children need more exercise than other people |
| C．old people like to take medicine to treat their illnesses |
| D．middle-aged people are easy to get fat |
| A．enjoy walking more |
| B．are cleverer and healthier |
| C．are stronger but more foolish |
| D．are cleverer but weaker |
| A．Because they are easy to become ill． |
| B．Because they eat less than other people． |
| C．Because they have less exercise than other people． |
| D．there is less calcium in their bones than in those of other people． |
| A．only middle-aged persons can benefit from physical exercise |
| B．physical exercise can do good to both the middle-aged and children |
| C．people of different ages can all benefit from physical exercise |
| D．physical exercise is the safest treatment for losing calcium |
However，there was some decline in their psycho-motor(精神运动的)speed． This means that it took them longer to accomplish mental tasks than it used to．But when speed was not a factor，they lost very little intellectual (智力的) ability over the years.In general，Dr．Jarvik’s studies have shown that there is no decline in knowledge or reasoning ability．This is true not only into the 30s and 40s，but into the 60s and 70s as well．
As for learning new things，and ability to remember，studies by Dr．Jarvik and others show that the old are equal to the young．It is true that older people themselves often complain that their memory is not as good as it once was．However，much of what we call“loss of memory”is not that at a11．
In the cases where the older person’s mind really seems to decline，it is not necessarilv a sign of a decay due to becoming old or“senility”．Often it is simply a sign of a depressed emotional state．This depression usually can be got rid of by counseling(咨询)with a psychologist，or medicine which fights depression.
In American society，when an older person loses something，we tend to call him or her“senile”．But notice that when a younger person loses something，he does not blame it on senility or loss of memory．He finds some other excuse!
小题1:A long-term study of 136 pairs of twins showed that the only factor that declined over the years was .
| A．mental health | B．intellectual ability |
| C．the amount of knowledge | D．psycho-motor speed |
| A．reason better | B．learn fewer new things |
| C．remember less | D．1ose little ability to remember |
| A．excellent health | B．weakness in body and mind because of old age |
| C．occasional forgetfulness | D．giving up one’s life |
| A．a sign of a decay due to old age or“senility’’is a common thing |
| B．older persons are wiser than younger ones because of different knowledge amount |
| C．senility or mental decay due to aging is much less common than most of us believe |
| D．a sign of a depressed emotional state is not a reason of decay |
__小题1:__ Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the cas
e.The ridge(隆起) structure on a person’s fingers does not change with growth and is not affected by surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one, which bears a reproduction of the original pattern. __小题2:_ Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take.
Finger-prints can be made very easily with printer’s ink. They can be recorded easily. __小题3:_ Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain. __小题4:_ When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect(察觉) with the naked eye. __小题5:__ Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.
| A．Special techniques are used to “develop” them. |
| B．A fingerprint is an impression of the friction ridges of all part of the finger. |
| C．It is only when the inner skin is injured that the arrangement will be destroyed. |
| D．With special methods, identification can be achieved successfully within a short time. |
F. His finger-prints can prove who he is even if his appearance has been changed by age or accident.
G. Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable.
Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds. (2) citrus(柑桔) fruits and tomatoes; (3) potatoes and other fruits and vegetables; (4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal(谷类), rice is also in this kind of food; (7) butter, or something like butter.
Paragraph 2
People in different countries and different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times a day. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked, canned or frozen. It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at eleven o’clock at night. The important thing is what you eat every day.
Paragraph 3
There are two problems, then, in feeding the large number of people on earth. The first is to find some ways to feed the world’s population so that no one is hungry.The second is to make sure that people everywhere have the right kinds of food to make them grow to be strong and healthy.
小题1:According to the scientists, which of the following groups of food is the healthiest for your lunch?
| A．chicken, apples, cereal, cabbages | B．potatoes, carrots, rice, bread |
| C．oranges, bananas, fish, tomatoes | D．beef, pork, fish, milk |
| A．three times a day | B．dinner at twelve o’clock |
| C．cooked food all the day | D．something from each of the seven kinds of food every day |
| A．has the right kinds of food to eat | B．cooks their food in the same way |
| C．has their meals at the same time | D．eat food in different ways |
| A．When people eat their lunch | B．What to do with the two problems |
| C．How to cook food in different ways | D．Why people eat different kinds of food |
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