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[主观题]

Scientists used to explore【31】the surface of the ocean. Now they【32】below the surface, too

. They want to know about the ocean water and the【33】and animal life【34】in the ocean.

In 1934 the scientist William Beebe dived 3 , 000 feet below the surface in a hollow steel ball. In 1935 Auguste Piccard dived 10, 330 feet. In 1960 his son Jean dived to a【35】of 35, 800 feet.

All these early dives were deep. But the divers could not stay down for very long. They had to【36】the surface after a few seconds. Scientists needed to stay down longer to study life below the surface.【37】, they succeeded. Cousteau, a Frenchman, was able to【38】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【39】equipment. With this new equipment, men can stay【40】the surface for days or【41】weeks. In 1962 Consteau【42】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【43】help from the surface.

Many countries are now studying undersea【44】. The Soviet Union has an undersea laboratory in the Crimean Sea. The United States has a laboratory 50 feet【45】on the ocean floor【46】the Virgin Islands. In 1970 five men lived there for two weeks. Then a【47】of five women scientists stayed in the laboratory.【48】came other teams of men. All were there to explore the ocean depths and【49】plans for the use of its resources. Scientists hope to find enough【50】, vegetable, and animal wealth there to provide food for the whole world.

(31)

A．in

B．to

C．on

D．under

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更多“Scientists used to explore【31】…”相关的问题

第1题

In the expression “On the other side of the coin” in Para. 3, “the coin” is used to refer

to______。

A. the misunderstanding of science

B. the scientific explanation

C. the money needed in scientific research

D. the curiosity of scientists and nonscientists

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第2题

Lead deposits, which accumulated in soil and snow during the 1960's and 70's, were primari

ly the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.

A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining.

In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate the lead sources. The dominant lead ratio found in Greenland snow matched that found ingasoline from the United States.

In a study published in the journal Ambio, scientists found that levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline.

Many scientists had believed that the lead would stay in soil and snow for a longer period.

The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected.

Scientists say both studies demonstrate that certain parts of the ecosystem respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.

The study published in the journal Nature indicates that

A．the Clean Air Act has not produced the desired results.

B．lead deposits in arctic snow on the increase.

C．lead will stay in soil and snow longer than expected.

D．the U.S. is the major source of lead pollution in arctic snow.

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第3题

The home computers industry has been growing【21】in the world for the last twenty years. Co

mputers used to be large, expensive machines that【22】very difficult to use. But scientists and technicians have been making smaller and cheaper while at the same time they have been made easier to use. As【23】, their popularity has been increasing as more people have been buying computers for their homes and businesses.

Computers have been designed to store【24】and compute complex problems. Computers are used in【25】traffic in some cities. Stores use computers to keep records of their goods and to send【26】to their customers. Offices use computers to type letters, record business and communicate【27】other offices. People have been using computers in their homes to keep track of expenses and【28】their household appliances on and off.

One important new【29】for computers is for entertainment. Many new games which have been designed to be played on the computers have become very popular【30】.

(46)

A．soon

B．smoothly

C．Vividly

D．rapidly

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第4题

Part BDirections: In the following text, some sentences have been removed. For Questions

Part BDirections:

In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list A-G to fit into the numbered blank when there are tow extra choices, which do not fit in any of the gaps. Mark your answers on ANSWER SHEET 1. (10 points)

At picnics, ants are pests. But they have their uses. In industries such as mining, farming and forestry, they can help gauge the health of the environment by just crawling around and being antsy.

It has been recognized for decades that ants—which are highly sensitive to ecological change—can provide a near-percent barometer of the state of an ecosystem. Only certain species, for instance, will continue to thrive at a forest site that has been cleared of trees. (41) And still others will move in and take up residence.

By looking at which species populate a deforested area, scientists can determine how "stressed" the land is. (42) Ants are used simply because they are so common and comprise so many species.

Where mine sites are being restored, for example, some ant species will recolonize the stripped land more quickly than others. (43) Australian mining company Capricorn Coal Management has been successfully using ant surveys for years to determine the rate of recovery of land that it is replanting near its German Creek mine in Queensland.

Ant surveys also have been used with mine-site recovery projects in Africa and Brazil, where warm climates encourage dense and diverse ant populations. "We found it worked extremely well there," says Jonathan Majer, a professor of environmental biology. Yet the surveys are perfectly suited to climates throughout Asia, he says, because ants are so common throughout the region. As Majer puts it: "That's the great thing about ants."

Ant surveys are so highly-regarded as ecological indicators that governments worldwide accept their results when assessing the environmental impact of mining and tree harvesting. (44)

Why not？ Because many companies can't afford the expense or the laboratory time needed to sift results for a comprehensive survey. The cost stems, also, from the scarcity of ant specialists. (45)

[A] This allowed scientists to gauge the pace and progress of the ecological recovery.

[B] Yet in other businesses, such as farming and property development, ant surveys aren't used widely.

[C] Employing those people are expensive.

[D] They do this by sorting the ants, counting their numbers and comparing the results with those of earlier surveys.

[E] The evolution of ant species may have a strong impact on our ecosystem.

[F] Others will die out for lack of food.

[G] Gretaceous ants shared a couple of wasp-like traits together with modern ant-like characteristics.

第41题：

(41)

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第5题

Futurists love computers. After all, 40 years ago electronic digital computers didn't exis

t; today microchips (微型集成电路片) as tiny as a baby's fingernail are making all sorts of tasks faster and easier. Surely the future hold still more miracles.

Some of the computer experiments now going inspire imagination of the future. For example, scientists are working in devices that can electronically perform. some sight and hearing functions, which could make easier for the blind and deaf. They are also working on artificial arms and legs that respond to the electric impulses (脉冲) produced by the human brain. Scientists hope that someday a person who has lost an arm could still have near-normal brain control over an artificial arm.

Video games, computerized effects in movies, and real-life training machines now being used by the U. S. Army are causing some people to predict new educational uses for computers. Computers could someday be used to imitate travel to other planets, to explore the ocean floor or to look inside an atom.

Experiment with electronic banking and shopping inspire predictions that these activities will soon be done from home computer terminals (终端) . Cars, too, might be equipped with computers to help drivers find their way around or to communicate with home and office computers.

Many people, including handicapped (残废的) workers with limited ability to move around, already are working at home using computer terminals. Each terminal is connected to a system at a company's main office. Some futurists say the day may come when few people will have to leave home to go to work—they'll just turn on a terminal.

Which of the following would be the most appropriate title for the passage？

A．Futurists and Computers

B．A Look at Future Uses of Computers

C．Computer Experiments

D．Scientists and Computers

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第6题

The making of glass is a very old industry--at least 4,500 years old. Glass has many extra

ordinary qualities and it is frequently being used in new ways.

One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair, which are designed to can-y light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.

Called light wave communication, the new system was used successfully in an experiment in Chicago in 1997. During the experiment, two glass fibers were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.

The lightwave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper. Second, they cost less.

Perhaps it can be said that telephone communication has entered the age of light.

One of the extraordinary qualities of glass is that it can carry ______.

A．sound signals

B．light signals

C．electrical signals

D．any signals

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第7题

根据内容回答下列各题，The home computer industry has been growing rapidly in the United Sta

tes for the last ten years. Computers used to be large, expensive machines that were very difficult to use. But scientists and technicians have been making them smaller and cheaper while at the same time they have been made easier to use. As a result, their popularity has been increasing as more people have been buying computers for their homes and businesses. Computers have been designed to store information and compute problems that are difficult for human beings to work out. Some have voices that speak with the operators. Stores use computers to keep records of their inventories (库存货物) and to send bills to their customers. Offices use computers to copy letters, record business and keep in touch with other offices. People have been using computers in their homes to keep track of the money they spend. One important new use for computers is for entertainment. Many new games have been designed to be played on the computers. People of all ages have been playing these games. People also have been buying home computers to play computer games, watch movies and listen to concerts at home. They have become very popular indeed. Computers used to _______.

A.work rapidly

B.be large and expensive

C.be easy to use

D.be used for fun

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第8题

This is not the world we know. This world is controlled by computers. Men and women can

be seen, but they are following the orders given to them by machines. The machines were designed by mad scientists, but at some point even the mad scientists were taken over by their super-inventions.

Does this sound familiar？ You have probably read something like it in magazines or books, or seen it in a film. Why is it so popular？ One of the reasons is that it reflects the fears of many people; fear of the unknown fear of what is not understood or, at least, fear of something that is not completely understood.

The fact is that every day it seems that computers take control of another area of our lives. Some

factory jobs are now done by robots and the robots are controlled by computers. Our bank accounts are managed by computers. At the airport, our tickets are sold by a computer. Certainly, many of these operations are made more

efficient by computers, but our admiration is sometimes mixed with unsafe feelings. And this lack of safety is caused by the fact that we do not know how computers do these things, and we really don't know what they might do next. But we can find out how computers work, and once we understand them, we can use computers instead of worrying about being used by them. Today, there is a new generation of computer wizards who know exactly how computers get things done. These young men and women, usually university students, are happy to sit for hours, sometimes for days, designing programs, not eating, not sleeping, but discovering what can be done by these wonderful slaves which they have learned to control. These computer wizards have learned to use the computer and search for new tasks for their machines.

(1)、According to the passage, our present world is under the control of ______ .

A：mad scientists

B：men and women

C：the unknown fear

D：some super-inventions

(2)、The reason why many people are afraid of computers is that ______ .

A：they don't know anything about computers

B：they haven't really understood computers

C：there are so many computer games

D：computers are often down

(3)、The author mentions computer wizards in order to point out that ______ .

A：computers can be controlled by man

B：there should be more people devoted to computers

C：only young people are interested in computers

D：more time and energy is required to control computers

(4)、This passage is probably written to suggest that ______ .

A：some day computers can deal with all human problems

B：computers can be used in place of traveling to our jobs

C：people should not fear computers

D：computer technology will not meet people's needs in various situations

(5)、The author's attitude towards widely used computers is __.

A：positive

B：anxious

C：worried

D：serious

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第9题

In July 1989, Dr.Fox and a team of scientists achieved a major scientific breakthrou

gh.Fox discovered the gene (基因) that causes cystic fibrosis (膀胱纤维症) (CF).Many geneticists consider it 's one of the most significantdiscoveries in human genetics.Theresults of Fox work have helped scientists developtests that identify carriers of the CFgene.They hope his research could cure CF.a testhas been developed to identify peoplerrying the cystic fibrosis gene.The test isbased on knowing where the gene is locatedhe CF gene is a recessive gene.Thismeans a person can carry one copy of the gene andstill not be affected by the disease.However if this person has children with anothererson who carries the Cf genethere is a 25 chance that their children will inherit twoopies of the gene and sufferfrom the disease.The test identifies whether pat for cysticrents carrythe defective CF gene.Researchers are also using Fox discovery to find a curefibrosis.They areworking to produce a drug that will change the activity of the Cf geneId alsoattempting to replace the defective gene with one that functions properly.Itdifficultto produce a drug that changes the Cf gene but does not affect the 100000thergenes of human.But Fox discovery has at least given a chance for the cure othe CF

1.A person with () of a harmful recessive gene will be affected

A.one copy

B two opies

C.no copies

D three copies.

2.We can find answers to the following questions in the passage except ()

A.Do people with CF live longer than they did in the past.

B Describeused to treat CF

C.Evaluate the current methods used to treat CF

D.Describe the drugs used to treat CF

3.The following statements are true except ()

A Only one quarter of people will have chance to have the disease.

B.Fox discovery help scientist develop tests that identify carriers of the CF gene

C.Scientist has already produced a drug to CF

D.To produce a drug is not easy because it should changes the CF gene but notaffectothers

4.The word “recessive” (line 6) probably means ()

A.hidden

B concealing

C.faint

D covered

5.The best title for the passage would be ()

A.Why People Have CF

B.The Drugs Used to Treat CF

C.The Methods of Curing CF

D.TheSignificance of the DiscoveryCystic Fibrosis Gene

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第10题

完成下列各题 C The home computer industry has been growi

ng rapidly in the United States for the last ten years．Computers used to be large and expensive which were very difficult to use．But scientists and technicians have been making them smaller and cheaper while at the same time they have been made easier to use．As a result．their popularity has been increasing as more people have been buying computers for their homes and business．Computers have been designed to store information and computer problems that are difficult for human beings to work out．Some have voice that speak with the operators．Stores use computers to keep records of their inventories(存货清单)and to send bills to their customers．Offices use computers to copy letters，record business and keep in touch with other offices．People have been using computers in their homes to keep track of their money they spend． One important new use for computers is for entertainment．Many new games have been designed to be played on the computers．People of all ages have been playing these games．People also have been buying home computers to play computer games．Watch movies and listen to concert at home．They have become very popular indeed． Computer used to________．

A.work rapidly

B.be large and expensive

C.be easy to use

D.be used for fun

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