题目内容

Here is an astonishing and significant fact: Mental work alone can't make us tired. It sounds absurd. But a few years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue(疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we could find it full of fatigue toxins(霉素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.

So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of efforts as at the beginning. The brain is totally tireless. So what makes us tired?

Some scientists declare that most of our fatigue comes from our mental and emotional(情感的) attitudes. One of England's most outstanding scientists, J. A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of a sitting worker in good health is due to emotional problems.”

What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated—those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.

1.What surprised the scientists a few years ago?

A.Fatigue toxins could hardly be found in a laborer's blood.

B.Albert Einstein didn't feel worn out after a day's work.

C.The brain could work for many hours without fatigue.

D.A mental worker's blood was filled with fatigue toxins.

2.According to the author, which of the following can make sitting workers tired?

A.Challenging mental work. B.Unpleasant emotions.

C.Endless tasks. D.Physical labor.

3.What's the author's attitude towards the scientists' ideas?

A.He agrees with them.

B.He doubts them.

C.He argues against them.

D.He hesitates to accept them.

4.We can infer from the passage that in order to stay energetic, sitting workers need to ________.

A.have some good food

B.enjoy their work

C.exercise regularly

D.discover fatigue toxins

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Finding time to read is an important part of developing reading and writing skills for all kids. And there are many easy and convenient ways to make reading a part of each day — even when it's tough to find time to sit down with a book.

Car trips, waits in checkout lines and the doctor's office are all opportunities for reading. Keep books or magazines in your car, or backpack to pull out whenever you're going to be in one place for a while. Even if you can't finish a book, read a few pages or discuss some of the pictures.

Encourage kids to bring favorite books and magazines along wherever you go. While it's attractive to provide electronic games and readers, be sure to alternate electronic media with plenty of opportunities to read traditional print books.

Reading opportunities are everywhere you go. While riding in the car, for example, encourage kids to spot words and letters (on billboards, store signs, etc.), turning it into a game (“Who’ll be the first to find a letter B?”).

Even daily tasks like cooking can provide reading moments. Kids can assist you as you cook by telling you how much flour to measure. Give your child a catalogue to read while you sort through the mail. Ask relatives to send your child letters, e-mail, or text messages, and read them together. Help your child create letters or messages to send back to the relatives. These types of activities help kids see the purpose of reading and of print.

Even when you’re trying to get things done, you can encourage reading. While cleaning, for instance, you might ask your child to read a favorite book to you while you work.

Make sure kids get some time to spend quietly with books, even if it means cutting back on other activities, like watching TV or playing video games.

Most important, be a reader yourself. Kids who see their parents reading are likely to imitate them and become readers, too!

1.What do we know about kids in Paragraph 3?

A. They are suggested taking reading materials only.

B. They can’t resist the desire of playing games.

C. Reading and playing games can be done by turns.

D. They are forbidden to play electronic games.

2.How does the author advise kids to keep in touch with relatives?

A. Make written communication.

B. Make a dialogue with each other.

C. Learn skills from them.

D. Read a catalogue together.

3.What can we learn from the last paragraph?

A. The longest journey begins with the first step.

B. God helps those who help themselves.

C. Detail is the key to success.

D. A fine example has boundless power.

4.What may be the best title for the text?

A. Reading approaches

B. Finding reading moments

C. Encouraging kids to read

D. What reading means to kids

There’s a whole lot of things that people fill their stomachs with. Some of them keep people alive. Some of them taste good to people. Some of them help people win pie-eating contests. Alcohol does none of these things. Why do people keep drinking it? And what does it do once it gets to their stomachs?

There are all kinds of alcohol molecules (分子), but the one that people most often pour down their throat is ethanol (乙醇). Ethanol is very tiny and it dissolves in water, so it gets into all sorts of places that it’s not supposed to. Alcohol heads for the digestive system. Because it dissolves in water, it can get into the water in the bloodstream. Because ethanol, to a certain extent, can pass through cell membranes(膜). It can go almost anywhere. It spreads through the muscles, and is sweated — unmetabolized(未经新陈代谢的) and whole — through the skin. It gets into the heart. It even takes a walk through the brain, and this is the secret of its powers.

Alcohol depresses the nerves, and the nerves affect almost every area of the body. Enough alcohol makes people sleep, so people who become unconscious choke on their own vomit (呕吐物). Most worryingly, enough alcohol can shut down those parts of the brain just like any other parts. People become unconscious and their brains simply forget to breathe.

Alcohol is broken down in the liver. Alcohol doesn’t destroy the liver, but products that the liver breaks the alcohol into do cause damage. A glass of wine per day can not do any harm. Instead, it can prevent heart attacks or can make someone functionally young. And it is kind of nice to know that sometimes, relaxation and cheer can be bottled. All that’s needed is to take care how much alcohol is let into a person’s brain.

1.How does the author introduce the topic of the text?

A. By statement.B. By question.

C. By arguing.D. By explaining.

2.Why can alcohol reach the brain?

A. Because it can move through water molecules in the blood.

B. Because it is small enough to get through any narrow space.

C. Because it is so light that the bloodstream can transport.

D. Because it is absorbed only by the cells in the stomach.

3.What’s the main idea of Paragraph 3?

A. Alcohol affects the work of the nerves.

B. Alcohol has an effect on people’s breath .

C. People are drunk when their brains get drunk.

D. Drinking too much is quite dangerous.

4.From the passage, we can know ________.

A. many people like a drink when they feel relaxed

B. enough alcohol can control the brain activities

C. alcohol damages the liver indirectly

D. proper alcohol may lead to better sleep

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