To get a full appreciation of what this means we must turn first to some recent human inventions. Everyoneknows that if he shouts near a wall or a mountainside, an echo will come back. The further off this solid obstacle, the longer time it will take for the return of the echo. A sound made by tapping on the main body of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps andthe receipt of the echoes the depth of the sea at that point can be calculated.So was born the echo-sounding equipment, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step fromlocating the sea bottom to locating a shoal of fish. With experience, and with improved equipment, it is now possible not only to locate fish but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
A few years ago it was found that certain bats emit squeaks (吱吱声) and by receiving ’he echoes they could locate and steer clear of obstacles--or locate flying insects on which they feed.This echolocation in bats is often compared with radar, the principle of which is similar.@@@@@@@ Choose correct answers to the question:
The main purpose of this passage is to ______.
A.describe that animals can make different sounds
B.prove that animals’ voices can play practical roles
C.inspire the readers to make more inventions
D.startle the readers with some shocking facts
The discovery of echolocation may help with all of the following EXCEPTA.measuring the depth of the sea
B.distinguishing different kinds of fish
C.improving the functions of radar
D.varying the size and nature of an object
By saying "A shoal of fish will do this"(Lines 6-7, Para 2), the author means ________.A.only one special kind of fish can reflect sounds
B.only one special kind of fish can be used to help locate a ship
C.a large group of fish can reflect sounds
D.a large group of fish can be used to help locate a ship
As it is discussed in the passage, the squeaks of bats can be functionally compared with ________.A.human languages
B.a mountainside
C.a shoal of fish
D.taps on a ship
Which of the following statements can be inferred from the passage?A.Animals are more intelligent than humans.
B.Humans are more intelligent than animals.
C.Animals are often compared with human inventions.
D.Humans are often inspired by animals.
请帮忙给出每个问题的正确答案和分析,谢谢!
第1题
According to the passage, natural sounds include all of the following EXCEPT
A.sounds made by animals themselves.
B.ocean drilling.
C.underwater earthquakes.
D.the breaking of ice fields.
第2题
According to the passage, natural sounds include all of the following EXCEPT
A.sounds made by animals themselves.
B.ocean drilling.
C.underwater earthquakes.
D.the breaking of ice fields.
第3题
People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life.
The words you know are called your vocabulary. You should try to make your vocabulary bigger. Read as many books as you can. There are plenty of books written in easy English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most-useful book.
From this passage, we know that
A.man never made sounds
B.man made animal sounds
C.man used to be like animals to make sounds
D.man learned from the animals to make sounds
第4题
People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life.
The words you know are called your vocabulary. You should try to make your vocabulary bigger. Read as many books as you can. There are plenty of books written in easy English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most useful book.
From this passage, we know that ______.
A.man never made sounds
B.man made animal sounds
C.man used to be like animals to make sounds
D.man learned from the animals to make sounds
第5题
No one knows how man learned to make words. Perhaps he began by making sounds like those made by animals. Perhaps he grunted like a pig when he lifted something heavy. (78) Perhaps he made sounds like those he heard all round him-water splashing,bees humming,a stone falling to the ground. Somehow he learned to make words. As the centuries went by, he made more and more new words. This is what we mean by language.
People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life.
The words you know are called your vocabulary. You should try to make your vocabulary bigger. Read as many books as you can. There are plenty of books written in easy English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most useful book.
From this passage, we know that __________.
A.man never made sounds
B.man made animal sounds
C.man used to be like animals to make sounds
D.man learned from the animals to make sounds
第6题
阅读下文,回答题
No one knows how man learned to make words. Perhaps he began by making sounds like
those made by animals. Perhaps he grunted like a pig when he lifted something heavy. (78)Per-haps he made sounds like those he heard all round him--water splashing, bees humming, a stone falling to the ground. Somehow he learned to make words. As the centuries went by, he made more and more new words. This is what we mean by language.
People living in different countries made different kinds of words. Today there are about fif-teen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life.
The words you know are called your vocabulary. You should try to make your vocabulary big-ger. Read as many books as you can. There are plenty of books written in easy English for you toread. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictiona-ry is your most useful book.
From this passage, we know that__________. 查看材料
A.man never made sounds
B.man made animal sounds
C.man used to be like animals to make sounds
D.man learned from the animals to make sounds
第7题
第8题
Today, many curious experiments are being made in all the fine arts. But the traditional methods and products of the fine arts all have things in common. For one thing they have "design". Design can be with sounds, with stones, with words, with building materials, with lines, and paint. A work of fine art is designed. And within that design, the creator "rhythm", "balance", and "harmony".
Rhythm comes from the more or less regular repetition of similar sounds, colors, shapes, and movements. Balance is the arrangement of what the artist works with so that the result seems right to us. And harmony is putting things together that seem to belong together. These, of course, are only rough ideas of what a creator in the fine arts tries to do.
Which of the following is not the fine art?
(13)
A.Sculpture.
B.Literature.
C.Music.
D.Tennis.
第9题
【C7】______how to use a computer and learning how to program one are two distinct activities. A【C8】______might be made【C9】______the competent citizens of tomorrow should【C10】______themselves from their fear of computers. But this is quite different【C11】______saying that all ought to know how to program one.【C12】______that to people who have chosen programming as a career. While programming can be lots of fun,【C13】______while our society needs some people who are experts at it, the same is【C14】______of auto repair and violin-making.
Learning how to use a computer is not【C15】______difficult, and it gets【C16】______all the time as programs become more "user-friendly'. Let us【C17】______that in the future everyone is going to have to know how to use a computer to be a【C18】______citizen. What does the phrase "learning to use a computer" mean? It sounds like "learning to drive a car"; that is, it sounds as if there is【C19】______set of definite skills that,【C20】______acquired, enable one to use a computer.
【C1】
A.moreover
B.for
C.whereas
D.though
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