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Can exercise during childhood protect you against memory loss many years later？Exercise early in life seems to have lifelong benefits for the brain，in rats at least.
   "This is an animal study，but it shows that physical activity at a young age is very important-not just for physical development，but for the whole lifelong track of cognitive（認(rèn)知的）development during ageing，" says Martin of the University of Toronto，Canada." In humans， it may put off the appearance of Alzheimer's symptoms（阿茲海默氏癥），possibly to the point of preventing them."
   Martin's team divided 80 young male rats into two equal groups，and placed running wheels in the cages of one group for a period of six weeks.Around four months later-when the rats had reached middle age-the team taught all the rats to connect an electric shock with being in a specific box.When placed in the box，they froze with fear.
   Two weeks later，the team tested the rats in three situations：exactly the same box in the same room，the same box with the room arranged differently，and a completely different box in a different room.
   The rats without access to（接觸）a running wheel when they were young now froze the same percentage of times in each of these situations，suggesting they couldn't remember which one was dangerous.But those that had been able to run in their youth froze 40 to 50 percent less in both changed box settings.
   "The results suggest the amount of physical activity when we're young，at least for rats，has influence on brain and cognitive health-in the form of better memories-when we're older，" says Arthur Kramer of Northeastern University in Boston，who has found that，in humans，exercise improves the growth of new brain cells.

（1）The study shows that
D
D
.
A．physical activity is important for physical health
B．using the running wheels is of benefit to the rats' growth
C．physical activity can prevent human's Alzheimer's symptoms
D．exercise when young can prevent memory loss when older in rats
（2）What does the underlined word "it" in Paragraph 2 refer to？
A
A

A．Exercise.
B．Development.
C．Benefit.
D．Study.
（3）How are Paragraph 3 and 4 mainly developed？
C
C

A．By analyzing causes.
B．By giving an example.
C．By describing the process.
D．By showing differences.
（4）What is the author's attitude towards the animal study？
B
B

A．Surprised.
B．Objective （客觀的）.
C．Critical （批判性的）.
D．Doubtful.

【考點(diǎn)】健康；說明文．

【答案】D；A；C；B

【解答】

【點(diǎn)評】

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發(fā)布：2024/4/20 14:35:0組卷：2引用：4難度：0.5

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1．Is there anything more important than health？I don't think so. "（1）

" wise people say.
   If you have a headache，toothache，backache，or bad pain in the stomach，if you complain（抱怨） of a bad cough，or if you suffer from high or low blood pressure，I think you go to the doctor.
   The doctor will examine your throat（喉嚨），test your blood pressure，take your temperature，sound your heart and lungs，check your teeth or have your chest X-rayed.（2）

The only thing you have to do is follow his advice.
   （3）

An old gentleman came to see the doctor.The man was very ill.He told the doctor about his weakness，memory loss and serious problems with his heart and lungs.The doctor examined him and said there was no medicine for his disease.He told his patient to go to a quiet place for a month and have a good rest.（4）

In other words，the doctor advised him to follow the rule：" Eat at pleasure，drink at pleasure and enjoy life as it is." The doctor also said that if the man wanted to be well again，he shouldn't smoke more than one cigarette a day.
   A month later the gentleman came into the doctor's office.（5）

He thanked the doctor and said that he had never felt a healthier man.
   "But you know，doctor" he said，" it's not easy to begin smoking at my age."

A.He also advised him to eat a lot of meat，drink two glasses of red wine every day and take long walks.
B.You can't be good at your studies or work well when you are ill.
C.After that he will advise some treatment or some medicine.
D.Health is the greatest wealth.
E.He looked cheerful and happy.
F.He was more worried about his illness.
G.Speaking about doctor's advice，I can't help telling you a funny story
發(fā)布：2024/11/1 21:30:2組卷：35引用：4難度：0.6
解析
2．Many people believe that there is some truth in the saying Laughter is the best medicine．（1）

Laughter helps relieve pain，strengthen the immune system and reduce stress．Laughter stimulates（激發(fā)） hormones which make us feel happy．Laughter also increases the flow of blood throughout the body and has benefits which are similar to the ones you get by doing exercise．
   （2）

Children exposed to funny films and cartoons before major medical procedures are able to cope better with pain and anxiety．（3）

These are professional clowns who are sent to hospitals and wards to entertain and distract sick children．
   Laughter therapy has become very popular in recent years and as a result，more and more laughter clubs are starting to open up in cities and towns all over the world．At a laughter session，a trained therapist instructs the group to perform a series of exercises which are designed to produce laughter．（4）

And it takes them some time to get rid of their inhibitions（心理抑制）．They might even start off with fake laughter，but this doesn't matter because our bodies can't tell the difference，and the results are the same．Moreover，laughter is contagious（傳染的）．（5）

   So next time you feel ill，stressed out or depressed，try watching a funny film or try remembering an amusing incident in your life．You will soon feel better．

A．If one person starts giggling，it is unavoidable that everyone else will be drawn in．
B．Laughter helps you focus．
C．This finding has led to so-called clown doctors．
D．In fact，research done by scientists has shown that laughter has a lot of health benefits．
E．Laughter makes the world a better and more colorful place．
F．Some people may find the idea embarrassing at first．
G．Using laughter therapy in children's hospitals has proven to be invaluable．
發(fā)布：2024/10/21 14:0:2組卷：12引用：2難度：0.5
解析
3．If you are already making the time to exercise，it is good indeed!With such busy lives，it can be hard to try and find the time to work out. （1）

.Working out in the morning provides additional benefits beyond being physically fit.
   ●Your productivity is improved.Exercising makes you more awake and ready to handle whatever is ahead of you for the day. （2）

.
   ●Your metabolism （新陳代謝） gets a head start. （3）

.If you work out in the mornings，then you will be getting the calorie （卡路里） burning benefits for the whole day，not in your sleep.
   ●（4）

.Studies found that people who woke up early for exercise slept better than those who exercised in the evening.Exercise energizes you，so it is more difficult to relax and have a peaceful sleep when you are very excited.
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.If you work out bright and early in the morning，you will be more likely to stick to healthy food choices throughout the day.Who would want to ruin their good workout by eating junk food？You will want to continue to focus on positive choices.
   There are a lot of benefits to working out，especially in the mornings.Set your alarm clock an hour early and push yourself to work out!You will feel energized all day long.

A.You will stick to your diet.
B.Your quality of sleep improves.
C.You prefer healthy food to fast food.
D.There is no reason you should exercise in the morning.
E.You can keep your head clear for 4-10 hours after exercise.
F.After you exercise，you continue to burn calories throughout the day.
G.If you are planning to do exercise regularly，or you're doing it now，then listen up!
發(fā)布：2024/10/28 17:30:2組卷：37引用：2難度：0.5
解析

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