DAn altimeter(高度计) is an instrument used in an airplane to tell the pilot how hi - 高中英语试题 - 超级试练试题库

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D
An altimeter(高度计) is an instrument used in an airplane to tell the pilot how high he is flying. The altimeter used in most airplanes is a kind of barometer(气压计), which, like barometer found in ordinary homes, is a measuring instrument for air pressure. The weight of the atmosphere presses downwards everywhere. At sea level this pressure is more than 14 pounds on every square inch of the surface. The higher you go into the air, the lower the air pressure is. An altimeter measures this air pressure to show the altitude of the airplane, or, how high it is above sea level.
But the altimeter does not show how high the plane is above the ground. A plane might be flying at an altitude of 15,000 feet, but it would be only a thousand feet or so above the ground if the land in that area happened to be 14,000 feet above sea level. The pilot adjusts his altimeter to the actual sea-level pressure before leaving the airport and then corrects it in flight by new information given to him by radio. He flies high enough to be above any mountain he may pass on his course .The barometer altimeter is correct within about 300 feet.
Another kind of altimeter, the radio altimeter, makes use of radio reflection. It calculates the height of the flying plane by sending out electrical signals to the surface below and measuring the time required for them to bounce back(反弹). It is correct within 15 feet over water, but is not reliable over land. Big planes usually have both kinds of altimeter.
67. Which of the following diagrams gives the correct relationship between altimeters and barometers? (a----altimeters, b----barometers)

68. The following drawing shows a plane flying over a mountain. Which of the heights given in the drawing is given by the barometer altimeter in the plane at this moment?

69. Suppose a plane using a radio altimeter is flying 10,000 meters above highland which is 4,000 meters above sea level. What reading will be given by the altimeter?
A.10,000meters. B. 4,000meters. C.14,000meters. D. 6,000 meters.
70. Suppose a plane using both kinds of altimeters is flying over a mountainous area where the land rises and falls very abruptly (迅速地). The pilot keeps his plane steady at the same height. What kind of reading will you get on each of the altimeters?
A. The readings on both altimeters will remain steady.
B. The readings on both altimeters will rise and fall abruptly.
C. The readings on the barometer altimeter will rise and fall abruptly, while that on the radio altimeter will remain steady.
D. The readings on the radio altimeter will rise and fall abruptly, while that on the barometer altimeter will remain steady.

答案

67-70 CCAD

解析

略

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试题【DAn altimeter(高度计) is an instrument used in an airplane to tell the pilot how hi】；主要考察你对题材分类等知识点的理解。[详细]

举一反三

The questions of what children learn, and how they should learn it, is continually being debated and reheated. Nobody dares any longer to defend the old system, the parrot – fashion (way of learning by repeating what others say) of learning lessons, the grammar with a whip system，which was good enough for our grandparents．The theories of modern psychology have stepped into argue that we must understand the needs of children．Children are not just small adults；they are children who must be respected as such．
Well，you may say，this is as it should be，and a good idea．But think further．What happens?
‘Education’ becomes the responsibility not of teachers, but of psychologists．What happens then? Teachers worry too much about the psychological implications of their lessons，and forget about the subjects themselves．If a child dislikes a lesson，the teacher feels that it is his fault，not the child’s. So teachers worry whether history is ‘relevant’ to modem young children．And do they dare to recount stories about violent battles? Or will this make the children themselves violent? Can they tell their classes about children of different races，or will this encourage racial hatred? Why teach children to write grammatical sentences? Verbal expression is better．Sums? Arithmetic? No：real—life mathematical situations are more understandable．
You see．you can go too far．Influenced by educational theorists，who have nothing better to do than write books about their ideas，teachers leave their teacher—training colleges filled with grand，psychological ideas about children and their needs. They make complicated preparations and try out their ‘modern methods’ on the long – suffering children. Since one ‘modern method’ rapidly replaces another, the poor kids will have well been fed up by the time they leave school. frequently the modern methods are so complicated that they fail to be understood by the teachers, let alone the children; even more often, the relaxed discipline so necessary for the ‘informal’ feeling the class must have, prevents all but a handful of children from learning anything.
63．Under the old system, children were           .
A．made to learn passively                        B．good enough to their grandparents
C．made to learn actively                          D．understood and respected by teachers
64．What happens when teachers pay too much attention to the psychological implications during a lesson?
A．They find that children dislike the lessons.
B．They worry too much about history, stories, racial hatred, grammar and arithmetic.
C．They don’t pay enough attention to what students are learning.
D．They tend to blame students for their failure in teaching.
65．How do you understand the underlined sentence at the end of the passage?
A．Children will learn well in a relaxed classroom atmosphere.
B．Few children will actually learn when there is no discipline.
C．Relaxed discipline is necessary for children to develop.
D．No children will learn anything without strict discipline.
66．What is the author’s attitude toward the theories of modern psychology?
A．Indifferent (不关心的).                       B．Tolerant (容忍的).
C．Supportive (支持的).                           D．Critical (批评的).

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What will man be like in the future — in 5,000 or even 50,000 years from now? We can only make guesses, of course, but we can be sure that he will be different from what he is today, for man is slowly changing all the time.
Let us take an obvious example. Man, even five hundred years ago, was shorter than he is today. Now, on average, men are about three inches taller. Five hundred years is a relatively short period of time, so we may assume that man will continue to grow taller. Again in the modern world we use our brains a great deal. Even so, we still make use of only about 20% of the brain’s capacity (容量). As time goes on, however, we shall have to use our brains more and more, and eventually we shall need larger ones! This is likely to bring about a physical change too: the head, in particular the forehead, will grow larger.
Nowadays our eyes are in constant use. In fact, we use them so much that very often they become weaker and we have to wear glasses. But over a very long period of time it is likely that man’s eyes will grow stronger.
On the other hand, we tend to make less use of our arms and legs. These, as a result, are likely to grow weaker. At the same time, however, our fingers will grow more sensitive because they are used a great deal in modern life.
But what about hair? This will probably disappear from the body altogether in course of time because it does not serve a useful purpose any longer. In the future, then, both sexes are likely to be bald.
Perhaps all this gives the impression that future man will not be a very attractive creature to look at! This may well be true. All the same, in spite of all these changes, future man will still have a lot in common with us. He will still be a human being, with thoughts and emotions similar to our own.
56. The size of man’s forehead will probably grow bigger because _______.
A. he will use his brain more and more as time goes on
B. he makes use only 20% of the brain’s capacity
C. his brain has grown larger over the past centuries
D. the other 80% of his brain will grow in due time
57. What serves as the evidence that man is changing?
A. Man has got stronger eyes now than he ever had.
B. Man has been growing taller over the past 500 years.
C. Man’s hair is getting thinner and thinner.
D. Man’s arms and legs have become lighter and weaker.
58. What will be true about a human being in the future?
A. He will be hairless because hair is no longer useful.
B. He will have smaller eyes and will wear better glasses.
C. His fingers will grow weaker because he won’t have to make use of them.
D. He will think and feel in a different way.
59. It is implied that __________________.
A. human beings will become more attractive in the future
B. body organs will become poorer if they are not used often
C. human beings hope for a change in the future life
D. future life is always predictable
60. The passage mainly tells us that _______________.
A. man’s life will be different in the future B. man is growing taller and uglier as time passes
C. future man will look quite different from us
D. human beings’ organs will function weaker

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C
Scientists used to explore on the surface of the ocean. Now they are exploring below the surface, too. They want to know about ocean water and the plant and animal life deep in the ocean.
In 1934 the scientist William Beebe dived 3,000 feet below the surface in a hollow steel ball. In 1935 August Piccard dived 10, 330 feet. In 1960 his son Jean dived to a depth of 35,800 feet.
All these early dives were deep. But the divers could not stay down for very long. They had to come back up to the surface after a few seconds. Scientists needed to stay down longer to study life below the surface. Gradually they succeeded. Cousteau, a Frenchman, was able to keep men down to a depth of 36 feet for one month and to a depth of 90 feet for a week.
Now scientists are developing even better equipment. With this new equipment, men can stay below the surface for days or even weeks. In 1962 Cousteau set up a research station 35 feet below the surface. Then in 1964 he set up another station on the ocean floor of the Red Sea. This was the first undersea station to operate without help from the surface.
Many countries are now studying undersea living things. The former Soviet Union had an undersea laboratory in the Crimean Sea. The United States has a laboratory 50 feet down on the ocean floor off the Virgin Islands. In 1970 five men lived there for two weeks. Then a team of five women scientists stayed in the laboratory. Next came other teams of men. All were there to explore the ocean depths and to make plans for the use of its resources. Scientists hope to find enough mineral, vegetable, and animal wealth there to provide food for the entire world.
64. In order to _____, scientists are exploring below the surface of the ocean.
A. know about the ocean water deep in the ocean
B. know about the plant and animal life deep in the ocean
C. stay down longer to study life of the plant and animal below the surface
D. both A and B
65. Who set up the first undersea station?
A. A Frenchman B. An American
C. A Russian D. The passage made no mention
66. Which of the following is true according to the passage?
A. Nobody can stay below the surface of the ocean.
B. The early divers could not stay below the surface of the ocean for very long.
C. The purpose of setting up the undersea laboratories is to make plans for the use of the resources in the ocean.
D. Up to now only five women scientists have stayed in the undersea laboratory.

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B
Science isn’t something mysterious, only for the few. Every one of us—whether a poet, worker, or physicist has to be able to think scientifically, and to understand some science, such as whether to smoke, what to eat, and what protection to use. Even for decisions that don’t depend on some scientific facts, science remains the proven set of best methods for getting exact information about the world.
Some people will end up as policy-makers in government or business. People such as these make decisions that affect the life of everyone, and most of them know no more about science than does the rest of the general public. Yet they are called upon to decide what to do about nuclear reactors(核反应堆), global warming, environmental toxins(环境霉素), expensive space programs, and biomedical research. It’s nonscientists, not scientists, who have the last word on whether the milk we drink can safely come from cows t

reated with medicine. To make such decisions wisely, the decision makers have to be drawn from a scientifically educated public.
Even if science is irrelevant（不相***） to the lives of ordinary Americans, a strong scientific spirit is basic to our economy, educational system, and society. This requires lots of young people to become excited enough by science that they decide to become professional scientists. This also requires, to some degree, the support and understanding of the general public.
Scientists are not always able to communicate their findings in an easy-to-understand manner. Although the scientists should do a better job of explaining what they have discovered, members of the general public have to make efforts to understand what is being said.
46．What does the author mean by saying that “a strong scientific spirit is basic to the economy, educational system and society”?
A．School and society should encourage young people to become professional scientists.
B．The school should only teach lessons of economy and education·
C．A scientifically educated public is basic to the economy，educational system and society.
D．More scientists work in our economy, educational system and society.
47．The general public is required to _______.
A．support and understand the need of scientific education
B．check what the scientists are saying
C．give help to the policy-makers
D．become professional scientists
48．The main idea of this passage is _________.
A．policy—makers must be science professionals
B．science is not far from everyone’s life
C．science has nothing to do with ordinary Americans
D．science professionals make decisions that affect the life of everyone
49．According to the passage, who can decide whether the milk we drink can safely come from
cows treated with medicine?
A．Scientists B．Young people C．The public D．Policy-makers

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E
One reaction to all the concern about tropical deforestation（砍伐森林） is a blank stare that asks the question, "Since I don"t live there, what does it have to do with me?"
The answer is that your way of life, wherever you live in the world, is tied to the tropics in many ways. If you live in a house, wash your hair, eat fruits and vegetables, drink soda, or drive a car, you can be certain that you are affected by the loss of tropical forests.
Biologically, we are losing the richest regions on earth when, each minute, a piece of tropical forest, the size of ten city blocks ,disappears. As many as five million species of plants, animals, and insects (40 to 50 percent of all living things) live there, and are being lost faster than they can be found and described. Their loss is immeasurable.
Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not good enough. Today over half the world"s commercial rubber is produced in Malaysia and Indonesia, while the Amazon"s rubber industry produces much of the world"s four million tons. And rubber is an important material in making gloves, balloons, footwear and many sporting goods. Thousands of other tropical plants are valuable for their industrial use.
Many scientists strongly believe that deforestation contributes to the greenhouse effect -- or heating of the earth from increased carbon dioxide in the atmosphere. As we destroy forests, we lose their ability to change carbon dioxide into oxygen.
Carbon dioxide levels could double within the next half-century, warming the earth by as much as 4.5 degrees. The result? A partial melt-down of polar ice caps, raising sea levels as much as 24 feet; even 15 feet could threaten anyone living within 35 miles of the coast. Unbelievable? Maybe. But scientists warn that by the time we realize the severe effects of tropical deforestation, it will be 20 years too late.
Can tropical deforestation affect our everyday lives? Now, you should have got the answer.
58．The underlined word "synthetics" probably means a kind of _________.
A．natural rubber B．tropical material C．man-made material D．tropical tree
59．In the last paragraph the author tries to__________.
A．tell people how to avoid the tropical deforestation
B．show us how important it is to protect the tropical forests
C．persuade people to buy something synthetic
D．let people realize the effect of tropical deforestation
60．The author"s attitude towards the tropical deforestation is____________.
A．puzzling B．cold C．supporting D．opposed

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