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根据以下内容回答题：Scientists know that there are two basic approaches to prolonging life（

根据以下内容回答题：

Scientists know that there are two basic approaches to prolonging life（延长寿命），one approache is the elimination of the diseases that generally affect older people—diseases such as cancer，heart attack and stroke．（1）is the delay of the process of growing-old the（2）of the body． In recent years scientific researchers（3）much time in the study of the process of aging．They believe that，within a few years，they will develop the knowledge and the（4）to delay the aging process for lo to 15 years．The result will be that more people will live longer，more healthful lives．At present，scientists believe that with the right diet，exercise，medical（5），and mental attitude many people can live to he l00 years old． Gerontologists（老年学专家），people who（6）studies of the problems of growing old，are investigating（7）body cells slow down and（8）die．They feel that delaying this slowing down process（9）help postpone death．In a number of American universities，scien-tists are studying the activity of cells，the effects of diet and internal body temperature on aging．If their studies are successful，the results should help（10）the quality of life for older people in the next few years，as well as increase the life span of the next generation．

1.

A.Others

B.Another

C.The other

D.One more

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更多“根据以下内容回答题：Scientists know that…”相关的问题

第1题

根据以下内容回答题：A tid．al wave is a very large and very destructive wall of water that r

根据以下内容回答题：

A tid．al wave is a very large and very destructive wall of water that rushes in from the ocean toward the shore．Many scientists call these huge waves tsunami（海啸）．In Japanese tsunami means“storm wave”0r“tide”．But do you know that tidal waves are not caused bv storms and that they are not true tides at all？A true tide is the regular rise and fall of ocean waters，at def-inite times each day．But a tidal wave comes rushing in suddenly and unexpectedly．A tidal wave is caused by an underwater earthquake．Scientists call the underwater earthquake a seaquake．The word“seaquake”is made up of two words．the word’“sea”which means“ocean”and the word“quake”．To quake means“to shake”or“to tremble”．When a seaquake takes place at the bottom of the ocean，the ocean floor shakes and trembles，and sometimes the ocean floor shifts．It is this shifting that produces the tidal wave．The tidal wave begins to move across the sea at great speed． Tidal waves have taken many human lives in the past．Today scientists can predict when a tidal wave will hit land．They use a seismograph to do this．A seismograph is an instrument that records the strength，the direction，and the length of time of an earthquake or seaquake．It is not possible to hold back a tidal wave，but it is possible to warn people that a tidal wave is coming．This warning can save many lives．

According to the article，what causes a tidal wave？

A.The rise and fall of ocean water at regular times．

B.Seaquakes．

C.Storm．

D.The great speed of the ocean waves．

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第2题

根据以下内容回答题：It is Dredicted that there will be four scientific breakthroughs in the

根据以下内容回答题：

It is Dredicted that there will be four scientific breakthroughs in the 21 st centruy． We wiuknow where we came from．Since the l920s，scientists have known the universe is expanding，which means it must have started at a definite time in the past．They even have de-veloped theories that give a detailed picture of the universe from the time it was a fraction of a second old to the present．Over the next couple of decades，these theories will be improved by data from powerful new telescopes． We will find out the genetic code and conquer cancer．In l9th century operas，when the heroine coughs in the first act，the audience knows"she will die of tuberculosis in the third act．

But thanks to 20th century science，the once deadly disease now means nothing more serious than taking some pills．As scientists learn more about the genetic code and the way cells work，many serious desease——cancer．will become less threatening． We will live longer，probably up to 1 20 years．If the normal aging process is basically a fierce．invisible contest in our ceus——a contest between damage to our DNA and our ceils’abili-ty to repair that damage，gre{at progress around．But before we push scientists to do more，we should consider：do we really want to live in a world where no one grows old？We will haye a hrain road map．This is the real final frontier of the 21 st century．The brain is the most complex system we know．It contains about l00 billion nerve cells，each con-nected to as many as l000 0thers．Early in the 21 st century，progress in science will make it Dossible to produce detailed images of the nerve cells in operation．We will be able to say with certainty which ones are working when you read or think about a word．

Jadging from the second paragraph，the writer thinks of present theories about the uinverse as __________．

A.perfect

B.imperfect

C.groundless

D.complicated

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第3题

根据以下内容回答题，There was one thought that air pollution affected only the area immedia

根据以下内容回答题，

There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic．At present，we realize that although these are the．areas with the worst air pollution，the problem is literally worldWide．On several occasions over the past decade，a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile tmmc．In fact，the very climate of the entire earth may be infected by air poilu-tion．Some scientists consider that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels（coal and oil）is creating a“greenhouse effect”——con-serving heat refleeted from the earth and raising the world’S average temperature．If this view is correct and the worid’s temperature is raised only a few degrees，much of the polar ice cap will melt and cities such as New York，Boston，Miami，and New Orleans will be in water． Another view．1ess widely held，is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth’s temperature——a result that would be equally disas-trous．A drop of just a few degrees could create something close to a new ice age，and would make agriculture difficult or impossible in many of our top fanning areas．Today we do not know for sure that either of these conditions will happen（though one recent government report drafted bv experts in the field concluded that the greenhouse effect is#cry possible）．Perhaps，if we are lucky enough，the two tendencies will offset each other and the world’s temperature will stay about the same as it is now．

As Dointed out at the beginning of the passage，people used to think that air pollution__________ ．

A.caused widespread damage in the countryside

B.affected the entire eastern half of the United States

C.had a damaging effect on health

D.existed merely in urban and industries areas

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第4题

根据以下内容，回答题。某企业三种产品的单位成本和产量资料如下表：若根据上表资料编制三种产品的总成本指数、成本总指数、产量总指数，并分析由于单位产品成本和产量变动对产品总成本的影响，请回答下述问题：总成本指数为（）

A.108．62%

B.118．04%

C.92．05%

D.98．45%

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第5题

根据以下内容回答题：Earthquakes may rightly be ranked as one of the most destructive forces

known to man：since reeords began to be written down，it has been estimated that earthquake-related fatalities（死亡）have numbered in the millions，and that earthquake-related destruction has been be-vond calculation．The greater part of such damage and loss of life has been due to falling down of buildings and the effects of rockslides，floods，fire，disease，gigantic sea waves，and other phenomena（现象）resulting from earthquakes，rather than from the quakes themselves． The great majority of all earthquakes occur Off two specific areas，along the coasts of the Pacific Ocean and from the East Indies to the Atlas Mountains．But they may，however，happen anywhere at any time． This element of the unknown has for centuries added greatly to the fear and horror sur-rounding earthquakes，but in recent times there have been indications that earthquake predic-tion may be possible．By analyzing changes in animal behavior，patterns of movements in the earth’S surface．and other unusual phenomena，scientists have shown increasing Success in pre-dicting when and where earthquakes will strike．As a result，a worldwide earthquake-warning network is already in operation and has helped to prepare for the vast destruction that mightotherwise have been totally unexpected． It is．doubtful，that man will ever be able to control earthquakes and do away with the destructiveness altogether。but as how．and why earthquakes happen become better understood，man will become more and more able to deal with their possible destruction before it occurs．

Most destruction caused by earthquakes is the results of the following EXCEPT__________ ．

A.the collapsing of buildings and the fire it causes’

B.the floods and huge sea waves resulting from earthquakes．

C.the disease that often follows earthquakes

D.the panic brought about by earthquakes

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第6题

根据以下内容回答题：Economists believe that job earnings influence choice of occupation．The

根据以下内容回答题：

Economists believe that job earnings influence choice of occupation．They acknowledge that people place varying emphasis（1）income，but point out that workers tend to move from one occuDation to another（2）changes in salaries．In 1931，H．F．Clark，an economist，stated that“proper information regarding wages if sufficiently（3）upon people，will lead to correct choice of occupation and correct（4）of people in an occupation，provided barriers to occuDations have been removed．”This means that the supply and demand of．workers have（5）to do with wages，（6）in turn influence people to choose certain careers．However，all barriers to occupations will have to be removed（7）career choices can be（8）by eco-nomics alone．There is little question（9）economic factors have some influence on choice ofan occuDation．But to picture them as the major or most important reason（10）against the soundest of folk wisdom：“Man does not live by bread alone．”

1.

A.in

B.on

C.into

D.for

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第7题

根据以下内容回答题：Curiosity is not only a possible motivation，it is also a great help in

根据以下内容回答题：

Curiosity is not only a possible motivation，it is also a great help in your learning langua-ges．Remember that a language is not（1）a grammatical system．It is the（2）of a cer-tain culture of different cultures．It is no good（3）strings of words and lists of grammatical rules（4）you know as much as possible about the background of the language，so that you can understand the ideas conveyed and the references made，as well as the inferences whichCan（5）the information clearly given．So learn as much as you can about the different cul．tures which（6）English——watch television programs，listen to the radi0，try to obtain（7）and magazines written by native speakers，look at advertisements，and，above all，read——nottextbooks，（8）novels，poems and plays．They will show you how a language is（9）used．The English language is a living form. of expression which derives much of its（10）from the context，and much of its effect from a whole network of extra-linguistic knowledge．

1.

A.just

B.even

C.so

D.that

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第8题

根据下面内容，回答题： Scientists in the UK have announced that the piranhafish"s reputatio

根据下面内容，回答题：

Scientists in the UK have announced that the piranhafish"s reputation 21 a fearsome 22 may well not be deserved. The fish， which is found in the Amazon in Brazil， have been 23 as deadly carnivores（食肉动物） that work in shoals to overwhelm their prey and strip it of its flesh in seconds.

However， experts 24 St Andrews University say that piranhas are omnivores（杂食动物） that mainly eat fish， plants and insects. They form. big groups not to hunt but to defend 25 against other predators， according to the team.

"Previously it was thought piranhas shoaled as it 26 them to form. a cooperative hunting group，" said Professor Anne Magurran. " 27， we have found that it is primarily a defensive behavior. "

Piranhas can be attacked by animals 28 dolphins， caimans and large fish， so forming a shoal is a good way of 29 being killed. Piranhas of 30 age stay in the middle of the group for 31 and the 32 of the shoal differs according to the level of 33 When the water level is 34， the fish form. small groups as there is space to escape， but when the water level drops， they form. large groups as protection 35 predators.

材料题请点击右侧查看材料问题查看材料

A.as

B.as if

C.as though

D.since

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第9题

根据以下内容回答题：When I was a boy，children always objected（1)wearing school uniform. but

根据以下内容回答题：

When I was a boy，children always objected(1)wearing school uniform. but teacherswere(2)on it because they said all of US looked(3)．0therwise，they said，children would compete with(4)and the poorer children would be unhappy because people would see how poor they were．In recent years，however，many schools have(5)the idea of making children wear uniform. but funnily enough，now that children can wear(6)they like，they have adopted a uniform. of their own．When some journalists visited a London school，they found that aU the boys and girls were dressed in jcans．One girl said she would rather die than wear a coat instead of a jersey because(7)wants to look different(8)the other children in the class．Parents may not be as happy about th．is as children，but they(9)to be，because this new kind of uniform. is one that the children like，not something they have been forced to wear，and it is also(10)cheaper than school uniform. used to be．

请回答（1）题：查看材料

A.against

B.to

C.for

D.on

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第10题

根据以下内容回答题：In Hollywood there is a company that publishes children’S books with th

根据以下内容回答题：

In Hollywood there is a company that publishes children’S books with the aid of computers．Mthough other book companies also publish that(1)，this particular company is very unusual．It“personalizes”the books(2)having the computer make the reader the leading character in the story．Here is(3)they do it．Let us say your child is named Jenny．She lives on Oak Drive in St．Louis，has a dog named Spot，a cat named Tabby，and three playmates(4)names are Bettsy，Sandy，and Jody．The computer uses this information to fill out a story that has(5) been prepared and illustrated．The story is then printed with standard equipment as a hard-cover(6)．A child who receives such a book might say，“This book is about me．”The company，therefore，(7)itself the“Me-Books Publishing Company”．

Children like the me-books because they like to see(8)print their own names and the names of their friends and their pets．But more important．“Personalization ”has been found an important tool in(9)enthusiasms for reading．Me-books are thus helping a child to learn how to read by appealing to that natural desire to see hjs(10)Baffle in print．

请回答（1）题查看材料

A.item

B.way

C.kind

D.form

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