It is difficult for doctors to help a person with a damaged brain. Without enoug
题型：不详难度：来源：
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, then he operated on them. He made the monkeys’ blood back to the monkeys’ brains. When the brain’s temperature was 10℃, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
小题1:.The biggest difficulty in operating on the damaged brain is that ____.
| A．the time is too short for doctors |
| B．the patients are often too nervous |
| C．the damage is extremely hard to fix |
| D．the blood-cooling machine might break down |
| A．taking the blood out of the brain |
| B．trying the operation on monkeys first |
| C．having the blood go through a machine |
| D．lowering the brain’s temperature |
| A．can last as long as 30 minutes |
| B．can keep the brain’s blood warm |
| C．can keep the patient’s brain healthy |
| D．can help monkeys do different jobs |
a. send the cooled back to the brain b. stop the blood to the brain
c. have the blood cooled down d. operate on the brain
| A．a, b, c, d | B．c, a, b, d | C．c, b, d, a | D．b, c, d, a |
答案
小题1:.A
小题1:.D
小题1:.A
小题1:.B
解析
举一反三
gh to make one bring back his strength and get ready for a day’swork.
Fresh air is necessary to sound sleep. It is not without reason for some people to think that it is practicable to sleep in the open air. When one can keep himself warm, out-of-door sleeping probably gives the body its most complete relaxation(松弛).Ability to sleep is largely a habit . The conditions referred to only lead to sleep. Out-of-door exercises, a good habit of regular hours and the avoidance(避免) of late eating and worry, which are largely within the control of any person, are all helpful to sound sleep.
A bath at bedtime, neither hot nor cool but of body temperature, may be helpful to sleep. Sleep-producing drug(药）should never be taken except when suggested by a doctor.
小题1:How many hours are usually enough for the health of a pupil?
| A．Less than eight hours. | B．No more than eight hours. |
| C．Eight hours or so. | D．No less than eight hours. |
| A．Keeping good habits. |
| B．Staying up late at night. |
| C．Eating something at bedtime. |
| D．Forming the habit of taking sleep-producing drug. |
| A．his age | B．his height |
| C．his weight | D．his character |
| A．take a bath | B．do any housework |
| C．think a lot | D．go out for relaxation |
Then, consider this: you might be in a state of sub-health（亚健康）. Sub-health, also called the third state or gray state, is explained as a borderline（界限）state between health and disease.
According to the survey by the National Health Organization, over 45 percent of sub-healthy people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam-week.
Symptoms include a lack of energy, depression, slow reactions, insomnia, anger, and poor memory. Other symptoms include shortness of breath, sweating and aching in the waist and legs.
The key to preventing and recovering from sub-health, according to some medical experts, is to form good living habits, alternate work and rest, exercise regularly, and take part in open air activities.
As for meals, people are advised to eat less salt and sugar. They should also eat more fresh vegetables, fruits, fish because they are rich in nutritional elements -- vitamins and other elements that are important to the body.
Nutrition experts point out that it is not good to eat too much at one meal because it may cause unhealthy changes in the digestive tract（消化道）. They also say that a balanced diet is very helpful in avoiding sub-health.
小题1:.
According to this passage, which of the following is true?
| A．When you are in a state of sub-health, you should stay at home and keep silent. |
| B．When you are in a state of sub-health, you should go to see a doctor and buy some medicine. |
| C．When you are in a state of sub-health, you should have yourself examined in foreign countries. |
| D．When you are in a state of sub-health, you should find out the reasons and relax yourself. |
. It may be easy for middle-aged people to get sub-healthy because _________.
| A．they have used up their energy | B．they have lost their living hopes |
| C．they have more pressure in life and work | D．they begin to get older |
. The key to preventing you from falling into a state of sub-health is that you should ________.
| A．work hard | B．sleep more |
| C．form good living habits | D．take more medicine |
. The underlined word “alternate” in this passage is closest in meaning to _________.
| A．arrange by turns | B．cause to take place | C．keep oneself busy with | D．get tired of |
ise can be the sound of a jet airplane or machines in factories of loud music or other common sound at home and at work. A person only needs to hear the noise for little mire than one second to be affected.An American scientist has found that using aspirin (阿斯匹林) increase the temporary (暂时的)hearing loss or damage from loud noise. He did an experiment using a number of students at a university who all had normal hearing. He gave them different amounts of aspirin for different periods of time, then he tested their hearing ability. He found that students who were given four grams of aspirin a day for two days suffered much greater temporary hearing loss than those who did not use aspirin. The hearing loss was about two times as great.
The scientist said millions of persons in the U.S. use much larger amounts of aspirin than were used in his experiment. He said these persons face a serious danger of suffering hearing loss from loud noise.
小题1:.
.Doctors have long known that__________.
| A．one may lose his hearing when he hears a terribly loud noise. |
| B．one may become deaf when he hears a loud noise. |
| C．loud noises can cause damage to the hearing of the young people only |
| D．common sounds at home are not harmful to the ear |
.One conclusion you can draw from the passage is that aspirin________.
| A．makes hearing damage from loud noise worse |
| B．should never be taken more than four grams |
| C．can damage one’s hearing when it is given more than four grams daily |
| D．always increases hearing loss by two times |
. The American scientist did his experiment in order to find ________.
A．how  much aspirin would affect a person’s hearing |
| B．how much aspirin should be given in the treatment of the patients with hearing damage from loud noise |
C．whether aspirin would incr ease the temporary hearing damage from loud noises |
| D．whether the people who had hearing damage should use aspirin |
(苗条) without any effort. But a lot of people do put on too much weight and don’t like it. The question is, what can thy do about it?Some believe exercise can be helpful. But the trouble is that it only makes you want to eat more. You might sweat out a couple of pounds playing tennis or climbing a mountain, but you put it all back on again with a big steak or bread and jam.
A helpful way is food choosing. But what sort of food should you choose? Some believe that the less they eat, the slimmer they will be. They don’t eat anything until they become weak with hunger. Some stick to milk and bananas. You’ll find you need a lot of bananas, and unless you live where they grow, they aren’t cheap. Another says that if you eat things like hard-boiled eggs, and apples with their skins on which are hard for your stomach to digest (消化), the more you eat, the thinner you get. This is because you use up the fat in your body to get the energy to digest the food.
For most of us these methods are too extreme (极端的). The simplest way is just to cut down on the carbohydrates (糖
类) that means not eating bread, potatoes, cakes, sugar, rice, and so on and eating anything else you like. It’s straight forward and often quite effective.Still others like to be more scientific. They are calorie countries. They get a table, which tells them that, for example, 100 grams of roast let of lamb gives you 330 calories and a 50 gram helping of Yokshire pudding gives you 130 calories.
小题1:.
. According to the passage, the best way to keep slim is ______.
| A．exercising | B．hunger | C．food-choosing | D．eating milk and bananas |
There seems nothing wrong with exercise except that ______.
| A．it makes you sweat | B．it’s hard work |
| C．it tires you out | D．it makes you eat more |
. The practical method suggested here means ______.
| A．sticking to bananas | B．not eating many carbohydrates |
| C．eating as little as possible | D．eating things that are hard to digest |
. Which of the following do you think is the best title for the passage?
| A．Don’t Eat Too Much | B．Various Ways of Losing Weight |
| C．Ways to Keep Fit | D．Food and Health |
Being healthy is a way of saying a person eats well, gets a lot of physical activity (exercise), and has a healthy weight. If you"re healthy, your body works well, feels good, and can do all the things you want to do. Here are five rules to live by, if you"re a kid who wants to be healthy.
Eat a Variety of Foods, Especially Fruits and Vegetables. You may have a favorite food, but the best choice is to eat a variety. If you eat different foods, you"re more likely to get the nutrients(营养) your body needs. Taste new foods and old ones you haven"t tried for a while. Get at least five servings of fruits and vegetables a day — two fruits and three vegetables.
Drink Water and Milk Most Often. When you"re really thirsty, cold water is the No. 1 for you. Kids need calcium（钙）to build strong bones, and milk is a great source of this mineral. How much do kids need? Aim for 3 cups of milk per day. You can mix it up by having milk and some other calcium-rich dairy foods .
Be Active.One job you have as a kid — and it"s a fun one — is that you get to figure out which activities you like best. Not everyone loves baseball or soccer. Ask your parents to help you do your favorite activities regularly. Find ways to be active every day. You might even write down a list of fun stuff to do, so you can refer to it when your mom or dad says it"s time to stop watching TV or playing computer games!
小题1: What’s the best title for this passage?
| A．Do Your Favorite Activities Regularly | B．Eat More Fruits and Vegetables Every Day |
| C．Drink Water and Milk When You Are Thirsty | D．Tips on How to Keep Healthy |
| A．Eating well | B．Having too much sleep |
| C．Having a healthy weight | D．Getting a lot of physical exercise |
| A．to drink milk every day | B．to eat what you haven’t eaten before |
| C．to eat all kinds of foods | D．to eat fruits and vegetables instead of grains |
| A．calcium | B．calcium-rich dairy food | C．milk | D．nutrients |
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