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阅读:Some radio singals were heard in 1967.They were coming from a point in the sky where there was unknown star

Questions 21 to 25 are based on the following passage:

Some radio singals were heard in 1967.They were coming from a point in the sky where there was unknown star.They were coming very regularly,too:about once a seco nd,if they were controlled by clock.

The scientists who heard the signals did not tell anybody else.They were rather afraid to tell in case they frightened people.The signals were coming from a very small body—no bigger,perhaps than the earth.Was that why no light could be seen from it?Or were the signals coming from a planet that belonged to some other star?There was no end to the questions,but the scientists kept the news secret.“Perhaps there are intelligent beings out there.”they thought,“who are trying to send messages to other planets,or to us?So the news was not given to the newspaper.Instead,the scientists studied the signals and searched for others like them...Well,all that happened in 1967 and 1968.Since then scientists have learnt more about those strange,regular,radio signals.And they have told the story,of course.

The signals do not come from a planet;they come from a new kind of star called a “pulsar””.About a hundred other pulsars have now been found,and most of them are very like the first one.

Pulsars are strong radio stars.They are the smallest but the heaviest stars we know at present.A handful of pulsar would weigh a few thousand tons.Their light—if they give much light—is too small for us to see.But we can be sure of this,no intelligent beings are living on them.

21. The radio signals discussed in this passage____.

A.were regular B.were controlled by a clock

C.were heard in 1967 only D.were secret messages 

22. The radio singals were sent by____.

A.a satellite 

B.a planet

C.a sky body which was unknown at that time

D.intelligent beings who were unknown at that time 

23. The scientists did not tell people about the signals because____.

A.the singals stood for secret messages

B.people would ask them too many questions

C.they did not want to frighten people

D.they stood for unimportant messages

24. A pulsar is____.

A. a small heavy star which sends out strong radio signals and cannot be seen 

B. a small heavy planet which sends out strong radio signals and cannot be seen 

C. a small heavy satellite which sends out strong radio signals and cannot be seen

D. a small intelligent being who sends out strong radio signals and cannot be seen

25. Which of the following is true?

A.One of the pulsars found by scientists sends radio signals.

B.Pulsar began to send radio singals in 1967.

C.Scientists have searched for pulsars for many years but found none.

D.Scientists have found many pulsars since 1967.

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更多“阅读:Some radio singals were heard in 1967.They were coming from a point in the sky where there was un…”相关的问题

第1题

阅读材料,回答题。Some psychologists(心理专家) maintain that mental acts such as thinking ar

阅读材料,回答题。

Some psychologists(心理专家) maintain that mental acts such as thinking are not performedin the brain alone, but that one&39; s muscles also participate. It may be said that we think with ourmuscles in somewhat the same way that we listen to music with our bodies.

You surely are not surprised to be told that you usually listen to music not only with your ears butwith your whole body. Few people can listen to music without moving their body or, more specifically,some part of their body. Often when one listens to a symphonic concert on the radio, he is attracted todirect the orchestra (乐队) even though he knows there is a good conductor on the job.Strange as this behavior. may be, there is a very good reason for it. One cannot derive all pos-sible enjoyment from music unless he participates, so to speak, in its performance. The listener"feels" himself into the music with more or less noticeable motions of his body. The muscles of the body actually participate in the mental process of thinking in the same

way, but this participation is less obvious because it is less noticeable.

Some psychologists think that thinking is__________ 查看材料

A.not a mental process

B.more of a physical process than a mental action

C.a process that involves our entire bodies

D.a process that involves the muscles as well as the brain

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第2题

阅读材料,回答题。Television has changed the lifestyle. of people in everyindustrialized cou

阅读材料,回答题。

Television has changed the lifestyle. of people in everyindustrialized country in the world. In the United States, where sociologistshave studied the effects, some interesting observations have been made.

Television, although not essential, has become an importantpart of most people’s lives. It alters people&39;s ways of seeing the World; inmany ways, it supports and sustains(维持) modem life. Televisionhas become a baby-sitter, an introducer of conversations, the major transmitterof culture and a keeper of tradition. Yet when what can be seen on TV in oneday is critically .analyzed, it becomes evident that television is not ateacher but a sustainer; the poor quality of programming does not elevate(提高)people into greater, understanding, but rather maintains and encouragesthe life as it exists.

The primary reason for the lack of quality in Americantelevision is related to both the history of TV programming development and theeconomics of TV. Television in America began with the radio. Radio companiesand their sponsors first experimented with television. Therefore, the close relationshipwhich the advertisers had with radio programs became the system for American.TV. Sponsors not only paid money for time within programs, but many actuallyproduced the programs. Thus, in American society, television is primarilyconcerned" with reflecting and attracting society rather thanexperimenting with new ideas. Advertisers want to attract the largest viewingaudience possible&39;. To do so requires that the programs be entertaining ratherthan educational, attractive rather than challenging.

Television in America today remains, to a large extent, with thesame organization and standards as it had thirty years ago. The hope forfurther development and true achievement-toward improving society will requirea change in the entire system.

According to theauthor, American television is poor in quality because________ 查看材料

A.advertisers are interested in experimenting with new ideas

B.it is still at an early stage of development, compared withthe radio

C.the programs have to be developed in the interests of thesponsors for economic reasons

D.it is controlled by radio companies

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第3题

The portable radio apparatus means ______.A.the radio apparatus fitted on the portside.B.t

The portable radio apparatus means ______.

A.the radio apparatus fitted on the portside.

B.the radio with a portable equipment.

C.the radio equipment which is easily movable.

D.the portable radio with some apparatus

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第4题

33、由singal操作唤醒的进程一定能够直接进入就绪状态
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第5题

-What are we supposed to do with these plants?-________.A.He wants us to put some of th

A.A.He wants us to put some of them in front of the windows.

B.B.I heard on the radio that it is going to be almost 40 degrees Centigrad

C.C.Is he joining us in the work?

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第6题

33、由singal操作唤醒的进程一定能够直接进入就绪状态()。
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第7题

34、Singal()操作的次序不当会引发死锁。
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第8题

Some forms of human communication from a primitive tribe to a global village (mention

A. computer network, TV stations, drumbeats, chopsticks

B. smoke signals, pigeons, peacocks, mobile phones, emails …

C. gestures, TV, email, fire, horns, flags, animals …

D. shouting to each other, printing, telegraph, radio, internet …

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第9题

(阅读理解题)Advertisements make us want too much, so we get the idea that the only pu

(阅读理解题)Advertisements make us want too much, so we get the idea that the only purpose of advertising is to sell goods.But it is not completely right.Advertisement has another equally important function—to inform.A great deal of the knowledge we have about household goods derives largely from the advertisements we read.Advertisements introduce us to new products or remind us of the existence of ones we already know about.Supposing you wanted to buy a washer, it is more than likely you would obtain details regarding performance, price, etc., from an advertisement.Lots of people pretend that they never read advertisements, but this claim may be seriously doubted.It is hardly possible not to read advertisements these days.And what fun they often are, too! Just think what a railway station or a newspaper would be like without advertisements.Would you enjoy gazing at a blank wall or reading railway byelaws while waiting for a train? Would you like to read only closely printed columns of news in your daily paper? A cheerful, witty advertisement makes such a difference to a drab wall or a newspaper full of bad news.We must not forget that advertising makes a positive contribution to our pockets.Newspapers, commercial radio and television companies could not subsist without this source of revenue.The fact that we pay so little for our daily paper, or can enjoy so many broadcast programs is due entirely to the money spent by advertisers.Just think what a newspaper would cost if we had to pay its full price! Another thing we mustn’t forget is the ‘small ads.’ in virtually every newspaper and magazine.What a tremendously useful service they perform. for the community! Just about anything can be accomplished through these columns.For instance, you can find a job; buy or sell a house; announce a birth, marriage, or death in these small ads.

(1).What will you possibly want to know from a washer advertisement?

A、some details

B、how much it will cost

C、its functions

D、all of the above.

(2).What is the author’s attitude towards most people’s claim that they never read advertisements?

A、doubt

B、agreement

C、acceptance

D、in favor of

(3).According to the text, which of the following statements is true?

A、only TV commercials are useful in daily life

B、advertisements help to change our life

C、advertisements should be serious

D、advertisements make us spend more money on newspaper, magazines and broadcast programs

(4).In the passage, the author is focusing on ____________.

A、how people buy things through advertisements

B、the useful service of advertisements to the community

C、how advertisers spend their money

D、the advantages and disadvantages of advertisements

(5).According to the passage, advertisements will NOT make us ____________.

A、buy something

B、know the functions of some new goods

C、learn some knowledge

D、forget the old things that are already known by people

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