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根据以下材料，回答题。Natural MedicinesSince earliest days， humans have used some kinds of m

根据以下材料，回答题。

Natural Medicines

Since earliest days， humans have used some kinds of medicines. We know this because humans have survived. Ancient treatments for injury and disease were successful enough to keep humans from dying out completely.

They were successful long before the time of modem medicine. Before the time of doctors with white coats and shiny （发亮的） instruments. Before the time of big hospitals with strange and wonderful equipment.

Many parts of the world still do not have university-educated doctors. Nor do they have expensive hospitals. Yet injuries are treated. And diseases are often cured. How？ By ancient methods. By medicines that might seem mysterious， even magical （有魔力的）. Traditional medicines are neither mysterious nor magical， however.

Through the centuries， tribal （部落的） medicine men experimented with plants. They found many useful chemicals in the plants. And scientists believe many of these traditional medicines may provide the cure for some of today"s most serious diseases.

Experts say almost 80% of the people in the world use plants for health care. These natural medicines are used not just because people have no other form. of treatment. They are used because people trust thegn. In developed areas， few people SiCk"about the source of the medicines they buy in a store. Yet many widely-used medicines are from ancient sources， especially plants.Some experts say more than 25 % of modem medicines come， in one way or another， from nature.

Scientists have long known that nature is really a chemical factory. All living things contain chemicals that help them survive. So scientists" interest in traditional medicine is not new. But it has become an urgent concern. This is because the earth"s supply of natural medicines may be dropping rapidly.

The passage indicates that ancient treatments for injury and disease were 查看材料

A.much more Successful than modem ones

B.successful enough for humans to survive

C.successful in all cases

D.of little help to humans

答案

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发布时间：2019-11-11

更多“根据以下材料，回答题。Natural MedicinesSince earliest days， humans have used some kinds of m”相关的问题

第1题

根据以下材料，回答题A Country"s Standard of LivingThe "standard of living" of any country m

根据以下材料，回答题

A Country"s Standard of Living

The "standard of living" of any country means the average person"s share of the goods and services the country produces. A country"s standard of living， therefore __________ （51） first on its capacity to produce wealth. "Wealth" in this __________ （52） is not money， for we do not live on money but on things that money can buy: "goods" such as food and clothing， and "services" such as transport and entertainment.

A country"s capacity to __________ （53） wealth depends upon many factors， most of __________ （54）have an effect on one another. Wealth depends __________ （55） a great extent upon a country"s natural resources. Some regions of the word are well supplied with coal and minerals， and have fertile （肥沃的）soil and a favorable climate; other regions __________ （56） none of them. Next to natural resources comes the ability to __________ （57） them to use. China is perhaps as rich as the USA in natural resources， but suffered for many years __________ （58） civil and external wars. And for this and other __________ （59） was unable to develop her resources. Sound and stable political conditionsand __________ （60） from foreign invasionsenable a country to develop its natural resources peacefully and steadily， and to produce more __________ （61） than another country equally well favored by nature but less well ordered.

A country"s standard of living does not only depend upon the wealth that is produced and __________ （62） within its own borders， but also upon what is directly produced through intemational trade. For example， Britain"s wealth in foodstuffs and other agricultural __________ （63） would be much less if she had to dependonly on those grown at home. Trade makes it possible for her surplus （过剩的） manufactured goods to be Waded abroad for the agricultural products __________ （64）would otherwise be lacking. A country"s wealth is， therefore， much influenced by its manufacturing capacity， __________ （65） that other countries can be found ready to accept its manufactures.

回答（51）题查看材料

A.calls

B.gets

C.depends

D.takes

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第2题

根据以下材料，回答题New Understanding of Natural Silk"s MysteriesNatural silk， as we all kn

根据以下材料，回答题

New Understanding of Natural Silk"s Mysteries

Natural silk， as we all know， has a strength that manmade materials have long struggled to match. In a discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough， MIT researchers have discovered that silk gets its strength from its weakness. Or，more specifically， its many weaknesses. Silk gets its extraordinary durability and ductility from an unusual arrangement of hydrogen bonds that are inherently very weak but that work together to create a strong， flexible structure.

Most materials- especially the ones we engineer for strength- get their toughness from brittleness. As such， natural silks like those produced by spiders have long fascinated both biologists and engineers because of their light weight， ductility and high strength （pound for pound， silk is stronger than steel and far less brittle）. But on its face， it doesn"t seem that silks should be as strong as they are; molecularly， they are held together by hydrogen bonds， which are far weaker than the covalent bonds found in other molecules.

To get a better understanding of how silk manages to produce such strength through such weak bonds， the MIT team created a set of computer models that allowed them to observe the way silk behaves at the atomic level. They found that the arrangement of the tiny silk nanocrystals is such that the hydrogen bonds are able to work cooperatively， reinforcing one another against extemal forces and failing slowly when they do fail， so as not so allow a sudden fracture to spread across a silk structure.

The result is natural silks that can stretch and bend while retaining a high degree of strength.

But while that"s all well and good for spiders， bees and the like， this understandingof silk geometry could lead to new materials that are stronger and more ductile than those we can currently manufacture. Our best and strongest materials are generally expensive and difficult to produce （requiring high temperature treatments or energy-intensive processes）.

By looking to silk as a model， researchers could potentially devise new manufacturing methods that rely on inexpensive materials and weak bonds to create less rigid， more forgiving materials that are nonetheless stronger than anything currently on offer. And if you thought you were going to get out of this materials science story without hearing about carbon nanotubes， think again. The MIT team is already in the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural silk—— like carbon nanotubes. Super-silks are on the horizon.

MIT researchers carry out the study to illustrate an ancient Chinese proverb. 查看材料

A.Right

B.Wrong

C.Not mentioned

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第3题

根据以下材料，回答题。A Success StoryAt 19， Ben Way is already a millionaire， and one of a

根据以下材料，回答题。

A Success Story

At 19， Ben Way is already a millionaire， and one of a growing number of teenagers who have（51 ） their fortune through the Internet.（52） makes Ben"s story all the more remarkable is that he is dyslexic， and was（53） by teachers at his junior school that he would never be able to read or write（54）."I wanted to prove them（55）"，says Ben， creator and director of Waysearch， a net search engine which can be used

（56） find goods in online shopping malls.

When he was eight， his local authorities provided him with a PC to help with school work.Although he was（57） to read the ，manuals， he had a natural ability with the computer，and（58） by his father， he soon began（59） people ~ 10 an hour for hisknowledge and skills. At the age of 15 he（60） up his own computer consultancy， Quad Computer， which he ran from his bedroom， and two years later he left school to（61） all his time to business.

"By this time the company had grown and ! needed to take on a（62） of employees to help me"， says Ben. "That enabled me to start doing business with（63） companies. " It was his ability to consistently.（64） difficult challenges that led him to win the Young Entrepreneur of the Year award in the same year that he formed Waysearch， and he has recently signed a deal（65） 25 million with a private investment company， which will finance his search engine.

请在第__（51）__处填上正确答案。查看材料

A.taken

B.made

C.put

D.done

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第4题

根据下列内容，回答题。某乳母，28岁，身高1．64 m，体重68 kg，产后3个月，进行母乳喂养，每天泌乳量约80

根据下列内容，回答题。

某乳母，28岁，身高1．64 m，体重68 kg，产后3个月，进行母乳喂养，每天泌乳量约800 m。

请参考表4为其设计出一天的食谱，请写出设计方案。（16分）

查看材料

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第5题

根据以下材料，回答题。The Fridge1 The fridge is considered a necessity. It has been so sin

根据以下材料，回答题。

The Fridge

1 The fridge is considered a necessity. It has been so since the 1960s when packaged food first appeared with the label: "store in the refrigerator. "

2 In my fridgeless Fifties childhood， I was fed well and healthily. The milkman came daily， the grocer， the butcher， the baker， and the ice-cream man delivered two or three times a week. The Sunday meat would last until Wednesday and surplus bread and milk became all kinds of cakes. NOthing was wasted and we were never troubled by rotten food. Thirty years on， food deliverieshave ceased， fresh vegettbIes are almost unobtainable in the country.

3 The invention of the fridge contributed comparatively little to the art of food preservation. A vast variety of well-tried techniquesady already existed natural cooling， drying， smoking， salting，sugaring， bottling...

4 What refrigeration did promote was marketing marketing hardware and electricity， marketing soft drinks， marketing dead bodies of animals around the globe in search of a good price.

5 Consequently， most of the world"s fridges are to be found， not in the tropics where they might prove useful， but in the ，Tealthy countries with mild temperatures where they are climatically almost unnecessary. Every winter， millions of fridges hum away continuously， and at vast expanse，busily maintaining an artificially-cooled space inside an artificially-heated house，-while outside，

nature provides the desired temperature free of charge.

6 The fridge"s effect upon the environment hasbeen evident， while its contribution to human happiness has been insignificant. If you don"t believe me， try it yourself. Invest in a food cabinet and turn off your fridge next winter. You may miss the hamburgers but at least you"ll get ride of that terrible hum.

Paragraph 2 查看材料

A.The invention of the fridge.

B.The pollution caused by fridges.

C.The widespread need for fridges.

D.The days without the fridge.

E.The waste of energy caused by fridges.

F.The fridge"s contribution to commerce.

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第6题

根据以下材料，回答题。A Letter from Alan-I have learnt of a plan to build three hundred hous

根据以下材料，回答题。

A Letter from Alan-

I have learnt of a plan to build three hundred houses on the land called Parson"s Place by the football ground. Few people know about this new plan to increase the size of our town. For me， Parson"s Place is special because it is a beautiful natural area where local people can relax——the small wood has many unusual trees and the stream is popular with fishermen and bird-watchers. It"s very quiet because there are few houses or roads nearby. I think that losing this area will be terrible because we have no other similar facilities in the neigh bour hood.

I am also against this plan because it will cause traffic problems. How will the people from the new houses travel to work？ The motorway and the railway station are on the other side of town. There fore these people will have to drive through the town centre every time they go anywhere.

The roads will always be full of traffic， there will be nowhere to park and the tourists who come to see our lovely old buildings will leave. Shops and hotels will lose business. If the town really needs more homes，the empty ground beside the railway station is a more suitable place.

No doubt the builders will make a lot of money by selling these houses. But，in my opinion， the average person will quickly be made poorer by this plan. As well as this， we will lose a very special place and our town will be much less pleasant.

I am going to the local government offices on Monday morning to protest about this plan and I hope that your readers will join me there. We must make them stop this. plan before it is too late.

Why has Alan written this letter？查看材料

A.To persuade the government to build new houses.

B.To protest about a new motorway near the town.

C.To encourage more people in the town to use Parson"s Place.

D.，To inform. other people about the builders" plans.

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第7题

根据以下资料。回答题。 2011年，陕西农村沼气池产气总量同比增长：

根据以下资料。回答题。

根据以下资料。回答题。 2011年，陕西农村沼气池产气总量同比增长：根据以下资料。回答题。 2011 2011年，陕西农村沼气池产气总量同比增长：查看材料

A.2．1%

B.3．2%

C.4．3%

D.5．4%

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第8题

根据以下材料，回答题。Some Things We Know About LanguageMany things about language are a my

根据以下材料，回答题。

Some Things We Know About Language

Many things about language are a mystery， and many will always remain so. But some things we do know.

First， we know that all human beings have a language of some sort. There is no race of men anywhere on earth so backward that it has no language， no set of speech sounds by which the people communicate with one another. Furthermore， in historical times， there has never been a race of men without a language.

Second， there is no such thing as a primitive language. There are many people whose cultures are undeveloped， who are， as we say， uncivilized， but the languages they speak are not primitive. In all known languages we can see complexities that must have been tens of thousands of years in developing.

This has not always been well understood; indeed， the direct contrary has often been stated.Popular ideas of the language of the American Indians will illustrate. Many people have supposed that the Indians communicated in a very primitive system of noises. Study has proved this to be nonsense. There are， or were， hundreds of American Indian languages， and all of them turn out to be very complicated and very old. They are certainly different from the languages that most of us are familiar with， but they are no more primitive than English and Greek.

A third thing we know about language is that all languages are perfectly adequate. That is，each one is a perfect means of expressing the culture of the people who speak the language.

Finally， we know that language changes. It is natural and normal for language to change ; the only languages which do not change are the dead ones. This is easy to understand if we look backward in time. Change goes on in all aspects of language. Grammatical features change as do speech sounds， and changes in vocabulary are sometimes very extensive and may occur very rapidly. Vocabulary is the least stable part of any language.

In the second paragraph the passage tells us that 查看材料

A.some backward race doesn"t have a language of its own

B.some race in history didn"t possess a language of its own

C.any human race， whether backward or not， has a language

D.some races on earth can communicate without language

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第9题

根据以下资料，回答题。 2011年．重庆文化产业增加值是2005年的：

根据以下资料，回答题。

根据以下资料，回答题。 2011年．重庆文化产业增加值是2005年的：根据以下资料，回答题。 20 2011年．重庆文化产业增加值是2005年的：查看材料

A.3．9倍

B.4．6倍

C.5．3倍

D.5．9倍

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第10题

根据以下资料。回答题。 201 1年，我国本地生产总值平减物价指数为：

根据以下资料。回答题。

根据以下资料。回答题。 201 1年，我国本地生产总值平减物价指数为：根据以下资料。回答题。 20 201 1年，我国本地生产总值平减物价指数为：查看材料

A.6．8%

B.7．5%

C.8．2%

D.8．9%

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