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What did scientists learn about earthquakes at the Rocky Mountain Arsenal？A) They occu

What did scientists learn about earthquakes at the Rocky Mountain Arsenal？

A) They occur at about 4,000 metres below ground level.

B) The injection of water into earthquake faults prevents earthquakes from occurring.

C) They are usually caused by the oil in the faults.

D) Harmful earthquakes earl be possibly prevented by causing small, harmless earthquakes.

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第1题

What did scientists learn about earthquakes at the Rocky Mountain Arsenal？A．They occur at

What did scientists learn about earthquakes at the Rocky Mountain Arsenal？

A．They occur at about 4,000 meters below ground level.

B．The injection of water into earthquake faults prevents earthquakes from occurring.

C．They are usually caused by the oil in the faults.

D．Harmful earthquakes can be possibly prevented by causing small, harmless earthquakes.

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第2题

Life on MarsPerhaps more than anything else, scientists are eager to find out if Martian l

Life on Mars

Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still exists.【61】telescopes first zoomed in【62】Mars in the 17th century, people have conjured up a wild【63】of images or what Martians might look like. But space probes like the 1997 Sojourner land rover have yielded no evidence of such alien beings.

Most experts agree that if life did at one time evolve on Mars, finding evidence of that life—which would likely take the form. of tiny organisms—won't be easy.【64】, many scientists are optimistic. "We've got organisms on Earth that adapted to life deep【65】the surface in underground water wells, " says Stephen Clifford. "【66】life like that evolved on Mars four billion years ago, there's no reason why it【67】today. "

【68】last year's disappointing losses, the future of Martian exploration looks【69】This year, two major

films about fictitious Mars missions—Red Planet and Missions to Mars—are certain to heighten interest in our planetary neighbour. More important, plans for new sets of NASA orbiters and landers—one to launch in 2001 , the other in 2003—are already in the works. Without a doubt, each new mission will inch scientists closer to【70】the mysteries of planet Mars.

(61)

A．When

B．Before

C．Ever since

D．Ever

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第3题

Language is human speech, either written or spoken.All languages have a system of sou

nds, words, a system of word order, and grammar.Word order is more important in English than in some other languages.The sound system is very important in Chinese and in many African languages.

Language is always changing.The earliest known languages had complicated grammar but a small, limited vocabulary.Over the centuries, the grammar changed, and the vocabulary grew.For example, the English and Spanish people who came to America during the sixteenth and seventeenth centuries gave names to all the new plants and animals they found.In this way, hundreds of new words were introduced into English and Spanish vocabularies.Today life is changing very fast, and language is changing fast, too.

There are several major language families in the world.Some scientists say there are nine main families, but other scientists divide them differently.The languages in each family are related, and scientists think that they came from the same parent language.

We learn our own languages by listening and copying.We do this without studying or thinking about it.But learning a foreign language takes a lot of study and practice.

(1).What do all languages in the world have？

A.Complicated vocabularies

B.Single grammar

C.Large vocabularies

D.A system of sounds

(2).What does the earliest known languages have？

A.Different word orders

B.Difficult grammar

C.Difficult vocabularies

D.Easy sound system

(3).What did the English and Spanish people who came to America do？

A.They gave names to different animals

B.They found many new plants and animals

C.They changed the grammar of English and Spanish

D.They introduced new words into English and Spanish

(4).Scientists think that the languages in each family_________________________.

A.are related

B.should be divided differently

C.should be separated

D.are not very different

(5).According to the passage, we learn our own language by_________________________.

A.thinking about it

B.practicing it

C.listening and copying

D.studying it

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第4题

___ recently ___ scientists known something about AIDS.

A.Not until…have

B.Until…did

C.Not until…do

D.Until…have

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第5题

According to the writer, how did the young scientists feel before the flight？A．sickB．keenC

According to the writer, how did the young scientists feel before the flight？

A．sick

B．keen

C．nervous

D．impatient

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第6题

The killer bees are coming! By the time you read this they will have reached Texas. By the

mid-1990s, they will have reached all the warmer areas of the United States. Scientists as well as farmers wait for them with a mixture of fear and wonder.

The killer bees should not be coming at all. Nature did not put them on this direct path for the United States; human beings did. The killer bees are from Africa. But in 1957 a scientist from Brazil got some of these killer bees for his experiments. The aim was to produce a better bee. However, an accident happened: a guest beekeeper let twenty-six of the queen bees escape by mistake. Before long, groups of killer bees took off for the woods.

Since that time, the wild killer bees have multiplied(繁衍) many times over. By 1998, their population was over 1015. They have spread all over South America, Central America, and most of Mexico. The United States is the next stop.

Are the killer bees really killers？ Yes, they are. In their first thirty years in America, they have killed thousands of hens, pigs, and other animals. While no one knows the exact number, it is believed that several hundred people have also been killed.

So be careful. Killer bees are on the way. Scientists have no idea what to do with them yet. There must be a way.

We know from the passage that killer bees will spread to the United States ______.

A．from north

B．from south

C．from west

D．from east

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第7题

Science, in practice, depends far less on the experiments it prepares than on the prepared

ness of the minds of the men who watch the experiments. Sir Isaac Newton supposedly discovered gravity through the fall of an apple. Apples had been falling in many places for centuries and thousands of people had seen them fall. But Newton for years had been curious a- bout the cause of the orbital motion of the moon and planets. What kept them in place？ Why didn’t they fall out of the sky？ The fact that the apple fell down toward the earth and not up into the tree answered the question he had been asking himself about those larger fruits of the heavens, the moon and the planets.

How many men would have considered the possibility of an apple failing up into the tree？ Newton did because he was not trying to predict anything. He was just wondering. His mind was ready for the unpredictable. Unpredictability is part of the essential nature of research. If you don’t have unpredictable things, you don’t have research. Scientists tend to forget this when writing their cut and dried reports for the technical journals, but history is filled with examples of it.

In talking to some scientists, particularly younger ones, you might gather the impression that they find the "scientific method" a substitute for imaginative thought. I've attended research conferences where a scientist has been asked what he thinks about the advisability of continuing a certain experiment. The scientist has frowned, looked at the graphs, and said "The data are still inconclusive." "We know that," the men from the budget office have said, "but what do you think？" Is it worthwhile going on？ What do you think we might expect？" The scientist has been shocked at having even been asked to speculate.

What this amounts to, of course, is that the scientist has become the victim of his own writings. He has put forward unquestioned claims so consistently that he not only believes them himself, but has convinced industrial and business management that they are true. If experiments are planned and carried out according to plan is faithfully as the reports in the science journals medicate, then it is perfectly topical for management to expect research to produce results measurable ill dollars and cents. It is entirely reasonable for auditors to believe that scientists who know exactly where they arc going and how they will get there should not be distracted by the necessity of keeping one eye on the cash register while the other eye is on the microscope. Nor, if regularity and conformity to a standard pattern are as desirable to the scientist as the writing of his papers would appear to reflect, is management to be blamed for discriminating against the "odd balls" among re- searchers in favor of more conventional thinkers who "work well with the team".

The autor wants to prove with the example of Isaac Newton that ______.

A．inquiring minds are more important than scientific experiments

B．science advances when fruitful researches are conducted

C．scientists seldom forget the essential nature of research

D．unpredictability weighs less than prediction in scientific research

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第8题

Through which character of the brain did the scientists study the brain？A．The brainwave pa

Through which character of the brain did the scientists study the brain？

A．The brainwave pattern.

B．The EEG.

C．The right frontal cortex.

D．The transformational thought.

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第9题

At the beginning, how did many scientists view Peppeberg's work？ A． It would r

At the beginning, how did many scientists view Peppeberg's work？

A． It would reveal a creature's mind.

B． It would probably end in failure.

C． It would be hard to judge its value.

D． It would be a long-term project.

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第10题

Unless we spend money spotting and preventing asteroids now, one might crash into Earth an

d destroy life as we know, say some scientists.

Asteroids are different forms of the meteoroids that race across the night sky. Most orbits the sun far from Earth and don't threaten us. But there are also thousands of asteroids whose orbits put them on a violent coming course together with Earth.

Buy $ 50 million worth of new telescopes right now. Then spend $10 mil]ion a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we'll have a way to change its course.

Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn't be cheap.

Is it worth it？ Two things experts consider when judging any risk are: 1) How likely the event is; and 2) How bad the consequences if the event occurs. Experts think asteroids big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall it would be the end of the world. "If we don't take care of these big asteroids, they'll take care of us. "Says one scientist. "Its that simple."

The cure, though, might be worse than the disease, Do we really want fleets of nuclear weapons silting around on Earth？ "The world has less to fear from doomsday rocks than from a great nuclear fleet set against them. "Said a New York Times article.

What does the passage say about asteroids and meteoroids？

A．They are heavenly bodies similar in nature.

B．There are more asteroids than meteoroids.

C．They are heavenly bodies different in composition.

D．Asteroids are more mysterious than meteoroids.

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