题目列表(包括答案和解析)
Below is a selection from a popular science book.
If blood is red, why are veins（静脉） blue?
Actually, veins are not blue at all. They are more of a clear, yellowish color. Although blood looks red when it’s outside the body, when it’s sitting in the vein near the surface of the skin, it’s more of a dark reddish purple color. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison.
Which works harder, you heart or your brain?
That kind of depends on whether you’re busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But in the long run, your brain probably tips it, because even when you’re sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it.
Why do teeth fall out, and why don’t they grow back in grown-ups?
Baby (or “milk”) teeth do not last long; they fall out to make bigger room for bigger, stronger adult teeth later on. Adult teeth fall our when they become damaged, decayed and infected by bacteria. Once this second set of teeth has grown in, you’re done. When they’re gone, they are gone. This is because nature figures you’re set for life, and what controls regrowth of your teeth switches off.
Do old people shrink as they age?
Yes and no. Many people do get shorter as they age. But, when they do, it isn’t because they’re shrinking all over. They lose height as their spine（脊柱） becomes shorter and more curved due to disuse and the effect of gravity(重力). Many (but not all) men and women do lose height as they get older. Men lose and average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again? No, because old people don’t really shrink! It is not that they are growing backwards ----- their legs, arms and backbones getting shorter. When they do get shorter, it’s because the spine has shortened a little. Or, more often, become more bent and curved.
Why does spinning make you dizzy（眩晕的）?
Because your brain gets confused between what you’re seeing and what you’re feeling. The brain senses that you’re spinning using special gravity-and-motion-sensing organs in your inner ear, which work together with your eyes to keep your vision balance stable. But when you suddenly stop spinning the system goes out of control, and your brain thinks you’removing while you’re not.
Where do feelings and emotions come from?
Mostly from an ancient part of the brain called the limbic system. All mammals have this brain area ----- from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other, newer bits of the brain, we feel more complex emotions than any other animal on this planet.
If exercise wears you out, how can it be good for you?
Because our bodies adapt to everything we do to them. And as far as your body is concerned, it’s “use it, or lose it”! It’s not that exercise makes you healthy, it’s more that a lack of exercise leaves your body weak and easily affected by disease
1.What is the color of blood in a vein near the surface of the skin?
A．Blue B．Light yellow
C．Red D．Dark reddish purple
2.Why do some old people look a little shrunken as they age?
A．Because their spine is in active use.
B．Because they are more easily affected by gravity.
C．Because they keep growing backwards.
D．Because their spine becomes more bent.
3.Which of the following statements about our brain is true?
A．In the long run, our brain probably works harder than our heart.
B．When our brain senses the spinning, we will feel dizzy.
C．The brains of the other mammals are as complex as those of humans.
D．Our feelings and emotions come from the most developed area in our brain.
4.What is the main purpose of the selection?
A．To give advice on how to stay healthy.
B．To provide information about our body.
C．To challenge new findings in medical research.
D．To report the latest discoveries in medical science.
New York is one of the last large American cities to have some of its policemen on horseback. The New York police have 170 horses that they use in certain parts of the city. The horses are expensive to feed, but it is even more expensive to take care of them. Because the horses must walk on the streets, they need special horseshoes. In fact, they need more than 8,000 of them each year. Every police horse in New York gets new shoes every month. Keeping these shoes in good repair is the job of six blacksmiths. There are only about thirty-five of these blacksmiths in the whole Unite States.
The cost of shoeing a horse is between twenty dollars and thirty--five dollars, and it takes a good blacksmith two to three hours to do the job.
A blacksmith’s job is not an easy one. He must be able to shape a shoe from a piece of metal and then fit it to the horse’s foot. The blacksmith must bend over all the time when he is fitting the shoe and must hold the weight of the horse’s leg while he works. But even more important, he must be able to deal with horses ------ for before the blacksmith can begin his work, he has to get the horse to lift its leg.
One of the blacksmiths in New York is James Corbin. He came to the country form Ireland in 1948.He not only makes horseshoes for the police but also works for a group of horse owners near the city. Corbin became interested in blacksmithing because his father did it, and, as he puts it, “It’s a good way to make a living.”
1.According to the reading passage, a blacksmith must be likely a man.
A. clever B. rich C. strong D. tall
2. James Corbin became a blacksmith because he .
A. was interested in horses. B. was needed by the policemen
C. drew a picture of the horses D. had to make a living
3. In the reading passage “to shape a shoe” is to .
A. fit it on the horse’s foot B. use it for two or three hours
C. make the form of a horseshoe from a piece of metal D. draw a picture of the shoe
4.The best title for the passage is .
A. Policemen on Horseback B. Blacksmiths and Horseshoeing
C. James Corbin, a Blacksmith D. Horseshoeing Is a Good Way to Make a Living
5. Which of the following is true?
A. Only a few large American cities have some policemen on horseback.
B. New York is the only city in America to have some policemen on horseback.
C. Policemen on horseback enjoy traveling around the United States.
D. Policemen on horseback are less expensive than those in cars.
New York is one of the last large American cities to have some of its policemen on horseback. The New York police have 170 horses that they use in certain parts of the city. The horses are expensive to feed, but it is even more expensive to take care of them. Because the horses must walk on the streets, they need special horseshoes. In fact, they need more than 8,000 of them each year. Every police horse in New York gets new shoes every month. Keeping these shoes in good repair is the job of six blacksmiths. There are only about thirty-five of these blacksmiths in the whole Unite States.
The cost of shoeing a horse is between twenty dollars and thirty--five dollars, and it takes a good blacksmith two to three hours to do the job.
A blacksmith’s job is not an easy one. He must be able to shape a shoe from a piece of metal and then fit it to the horse’s foot. The blacksmith must bend over all the time when he is fitting the shoe and must hold the weight of the horse’s leg while he works. But even more important, he must be able to deal with horses ------ for before the blacksmith can begin his work, he has to get the horse to lift its leg.
One of the blacksmiths in New York is James Corbin. He came to the country form Ireland in 1948.He not only makes horseshoes for the police but also works for a group of horse owners near the city. Corbin became interested in blacksmithing because his father did it, and, as he puts it, “It’s a good way to make a living.”
【小题1】According to the reading passage, a blacksmith must be likely a man.
| A．clever | B．rich | C．strong | D．tall |
| A．was interested in horses. | B．was needed by the policemen |
| C．drew a picture of the horses | D．had to make a living |
| A．fit it on the horse’s foot | B．use it for two or three hours |
| C．make the form of a horseshoe from a piece of metal | D．draw a picture of the shoe |
| A．Policemen on Horseback | B．Blacksmiths and Horseshoeing |
| C．James Corbin, a Blacksmith | D．Horseshoeing Is a Good Way to Make a Living |
| A．Only a few large American cities have some policemen on horseback. |
| B．New York is the only city in America to have some policemen on horseback. |
| C．Policemen on horseback enjoy traveling around the United States. |
| D．Policemen on horseback are less expensive than those in cars. |
New York is one of the last large American cities to have some of its policemen on horseback. The New York police have 170 horses that they use in certain parts of the city. The horses are expensive to feed, but it is even more expensive to take care of them. Because the horses must walk on the streets, they need special horseshoes. In fact, they need more than 8,000 of them each year. Every police horse in New York gets new shoes every month. Keeping these shoes in good repair is the job of six blacksmiths. There are only about thirty-five of these blacksmiths in the whole Unite States.
The cost of shoeing a horse is between twenty dollars and thirty--five dollars, and it takes a good blacksmith two to three hours to do the job.
A blacksmith’s job is not an easy one. He must be able to shape a shoe from a piece of metal and then fit it to the horse’s foot. The blacksmith must bend over all the time when he is fitting the shoe and must hold the weight of the horse’s leg while he works. But even more important, he must be able to deal with horses ------ for before the blacksmith can begin his work, he has to get the horse to lift its leg.
One of the blacksmiths in New York is James Corbin. He came to the country form Ireland in 1948.He not only makes horseshoes for the police but also works for a group of horse owners near the city. Corbin became interested in blacksmithing because his father did it, and, as he puts it, “It’s a good way to make a living.”
According to the reading passage, a blacksmith must be likely a man.
A. clever B. rich C. strong D. tall
James Corbin became a blacksmith because he .
A. was interested in horses. B. was needed by the policemen
C. drew a picture of the horses D. had to make a living
In the reading passage “to shape a shoe” is to .
A. fit it on the horse’s foot B. use it for two or three hours
C. make the form of a horseshoe from a piece of metal D. draw a picture of the shoe
The best title for the passage is .
A. Policemen on Horseback B. Blacksmiths and Horseshoeing
C. James Corbin, a Blacksmith D. Horseshoeing Is a Good Way to Make a Living
Which of the following is true?
A. Only a few large American cities have some policemen on horseback.
B. New York is the only city in America to have some policemen on horseback.
C. Policemen on horseback enjoy traveling around the United States.
D. Policemen on horseback are less expensive than those in cars.
The standard Outward Bound course lasts for three or four weeks. During that time the students live in the wilderness and go through many physical activities of ever increasing difficulty.
The first few days are given to physical conditioning and to the teaching of basic skills such as first aid, map and compass reading, rope climbing, and other similar activities.
During the second part of the course students learn how to climb rocks and cliffs, how to use canoes and rafts in swift water, and in some schools how to sail, ski, climb mountains, and make long-distance hikes.
The first two parts of the course are done in groups. Members work together and help each other to overcome the increasing number of challenges. In the third part of the course, students are sent out alone for three days to survive in the wilderness with only a few necessities.
Who are the students of Outward Bound? They are both young people and adults, men and women. The minimum age is 16.5 years. There is no maximum age. About one-third of the 6,000 persons completing the course each year are women. Businessmen, housewives, university students, professors, doctors, and lawyers are among those taking part in the course.
In recent years special courses for the busy business managers have gained in popularity. These courses last from five to ten days rather than the usual three to four weeks of the normal course.
Not all students complete the Outward Bound course. In some cases the individual cannot meet the physical challenges. In its own words Outward Bound literature says: "Make no mistake, Outward Bound is not for everybody. The courses aren't easy and are not meant to be."
Most students who finish the course share a common experience. They are surprised at themselves that they finish the course and they feel great pride in doing the impossible! The Outward Bound experience makes them feel that they are better than they know!
Where are Outward Bound courses given?
A. In the classroom.
B. On the playground.
C. In the wilderness.
D. In canoes and rafts.
All of the following are true EXCEPT __________.
A. Special courses for business executives last five to ten days longer
B. All of the students have to live outdoors
C. The students of Outward Bound are composed of both sexes over 16.5 years
D. More and more businessmen like the Outward Bound course
Which of the following is TRUE?
A. Around 6,000 people attend the course each year.
B. About 2,000 women attend the course each year.
C. About 2,000 women overcome the challenges each year.
D. Approximately 2,000 people overcome the challenges each year.
When students are sent out alone for the last three days in the course, they .
A. take anything they think necessary with them
B. take the equipment they found useful
C. are provided with everything to make them comfortable
D. are provided with only a few articles which are absolutely necessary
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