Farmers can produce more by planting several different crops in the same field .But their success depends on which crops they plant together and how they mixthem in the field .Until now, the only way 题目和参考答案——青夏教育精英家教网—

题目内容

　　Farmers can produce more by planting several different crops in the same field .But their success depends on which crops they plant together and how they mix（混合）them in the field .Until now, the only way the farmers could learn which crops grow best together was to plant them and wait for the results. Now however ,a computer can give them answers .A new computer program written by Dr John Vanderwell of Michigan University can tell a farmer which plants grow well together and which do not. It can tell him how to plant the different crops ;if he should plant each in a separate row ,or mix the crops in the same row .It can tell the farmer how changes in planting each of the crops will affect the production of all of them .And it can tell him which plants can help reduce losses（损失）from diseases .

1.Which of the following best gives the main idea of the passage?

　 A. The computer program helps find the best program for mixing plants

　　B. The computer program helps produce more crops

　　C. The computer program helps protect against insects and diseases

　　D. The computer program helps grow different plants

2.According to the passage, to get the best result, one needs to choose carefully___________.

　　A. the kinds of crops to be planted together B. the way for different crops to be mixed

　　C. both A and B 　　 D. either A or B

3.It seems the new computer program can NOT tell us______________.

　　A. whether we should grow cotton and tomato together

　　B. how we should plant cotton and tomato together

　　C. what will happen if we grow potato instead of tomato ,together with cotton

　　D. how we can grow rice in the fields which are intended for tomato.

4.The new computer program seems most useful in saving us ___________ .

　　A. man power 　　B. seeds 　　C. time 　　D. land

5.Which of the following is NOT true?

　　A. Computers can tell farmers how plants can grow together .

　　B. With the help of computers farmers don't have to do a lot of work .

　　C. With the help of computers farmers can get better results .

　　D. The change of one plant may cause a change in production.

BCDDB

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　　Computers have done a lot since they turned up. In the future they will play a more important part in many 1 , such as education, transport, personal lives, scientific research and 2 Nowadays computers are being 3 in agriculture and industry 4 can help the farmers to 5 the conditions of the plants.

　　More and more computers will come into our daily life with the 6 of science and technology. If you want to change money or pay your electricity bills, you won’t have to go to the 7 . A computer and a telephone will help you. It can also help you to do the housework and it can even 8 human voices and carry out the instructions. It is 9 10 the majority of the labour force will work at home. People will be able to use the videophone 11 conferences. This can help us to save a lot of energy and 12 .It is said that trains in Japan will have 13 , because they’ll be well 14 by computers, which can also tell the best 15 between trains.

　　Computer programmes for 16 whole texts are already will be developed. You can 17 the name of a certain subject and a 18 list of book titles, then they will 19 on your screen. You may choose 20 you want.

(1)A.families		B.fields	C.factories	D.places
(2)A.so on			B.so forth
C.so on and so forth			D.A or B or C
(3)A.used		B.put	C.shown		D.given
(4)A.which		B.that	C.and		D.so
(5)A.form		B.grow	C.control		D.manage
(6)A.increase		B.progress	C.production		D.development
(7)A.office		B.bank	C.shop		D.post office
(8)A.understand		B.carry out	C.hear		D.recognize
(9)A.important		B.necessary	C.possible		D.complete
(10)A.when		B.why	C.which		D.that
(11)A.at		B.for	C.with		D.in
(12)A.material		B.time	C.place		D.money
(13)A.driver			B.some drivers
C.fewer drivers			D.no drivers
(14)A.operated	B.done		C.made			D.run
(15)A.position	B.direction		C.distance			D.way
(16)A.storing	B.writing		C.remaining			D.recording
(17)A.give	B.put		C.type			D.write
(18)A.first-rate	B.world-famous		C./			D.worldwide
(19)A.show	B.appear		C.offer			D.come up
(20)A.whatever	B.what		C.whichever			D.which

　　When people moved into a new place,they oftan destroy many____1____plants. Many of these plants are____2____for the animals. If the animals cannot find____3____,they will die or have to____4____the place.

　　In one____5____of the United States, ____6____,the deer there____7____to eat a certain____8____of wild rose. The mountain lions there eat the deer. The number of deer,mountain lions and wild roses doesn’t____9____much,if

　　people leave things as they are.

　　But people killed many mountain lions to protect the deer. Soon there were____10____deer that they____11____all the wild roses. Then the deer began to eat the green____12____young trees. These trees were____13____to the farmers. So the farmers____14____to protect their trees. Now the deer had____15____to eat,and many of them died. This was a lesson from nature.

1．A．wild　　　　　　　　　　 B．new　　　　　　　　　　　　　　 C．old　　　　　　　　　　　　　　 D．good

2．A．bad　　　　　　　　　　　　 B．food　　　　　　　　　　　　　　 C．ready　　　　　　　　　　　　 D．diets

3．A．enough food for eat 　　　　　　　　　　　　　　　　　　　　 B．food enough for eat　　

　　C．enough food to eat 　　　　　　　　　　　　　　　　　　　　 D．to eat enough food

4．A．leave　　　　　　　　　　 B．leave for　　　　　　　　　　 C．hate　　　　　　　　　　　　 D．destroy

5．A．farm　　　　　　　　　　 B．part　　　　　　　　　　　　　　 C．hill　　　　　　　　　　　　　　 D．river

6．A．however　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B．in fact

　　C．as a result　　　　　　　　　　　　　　　　　　　　　　　　　　 D．for example

7．A．begin　　　　　　　　　　 B．learn　　　　　　　　　　　　　　 C．want　　　　　　　　　　　　 D．like

8．A．grass　　　　　　　　　　 B．tree　　　　　　　　　　　　　　 C．kind　　　　　　　　　　　　 D．plant

9．A．change　　　　　　　　 B．become　　　　　　　　　　　　 C．look　　　　　　　　　　　　 D．go

10．A．so few　　　　　　　　 B．so many　　　　　　　　　　　　 C．such bad　　　　　　　　　　 D．scuh big

11．A．killed　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B．ate up

　　C．destroyed　　　　　　　　　　　　　　　　　　　　　　　　　　 D．pulled out

12．A．grass and　　　　　　 B．leaves of　　　　　　　　　　 C．seeds and　　　　　　　　 D．grass of

13．A．healthy　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B．kind

　　C．expensive　　　　　　　　　　　　　　　　　　　　　　　　　　 D．important

14．A．thought of ways　　　　　　　　　　　　　　　　　　　　　　 B．did not wish

　　C．stopped　　　　　　　　　　　　　　　　　　　　　　　　　　　　 D．wanted them

15．A．nothing　　　　　　　　 B．something　　　　　　　　　　 C．much　　　　　　　　　　　　 D．no roses

Do you know insurance（保险）?Buying insurance is a 1 by which people can 2 themselves from large losses. Protection against fire is one kind of insurance. Large numbers of people pay 3 sums of money to an insurance company. Although thousands of people have paid for fire insurance, only 4 will lose their homes by fire. The insurance company will pay these homes 5 the sums of money it has collected.

The first modern fire insurance company was 6 in London, England, in 1666. A great fire had just 7 most of the city, and people wanted protection against 8 losses. The first company grew rapidly. 9 other companies were founded in other areas.

Benjamin Franklin helped form the first fire insurance 10 in America in 1752. He also 11 a new kind of insurance for 12 . The new insurance would offer protection against the lose of crops 13 storms. In 1759, Benjamin Franklin helped start 14 new insurance company in America. This company, which 15 life insurance, collected some money 16 from many different men. If a man 17 , his family was given a large sum of money. Today, this company is 18 in business.

Over the years, people have benefited from many new kinds of insurance when they have suffered from 19 accidents as car or plane crashes. Today almost everyone has 20 kind of insurance.

1. A. means　　　　　　　　　　　　 B. idea　　　　　　　　　　　　 C. thought　　　　　　　　 D. company

2. A. protect　　　　　　　　　　 B. stop　　　　　　　　　　　　 C. sell　　　　　　　　　　　　 D. introduce

3. A. small　　　　　　　　　　　　 B. large　　　　　　　　　　 C. little　　　　　　　　　　　　 D. a lot

4. A. few　　　　　　　　　　　　　　 B. quite a few 　　　　　　 C. a few　　　　　　　　　　 D. many

5. A. to　　　　　　　　　　　　　　 B. out of　　　　　　　　　　 C. by　　　　　　　　　　　　 D. of

6. A. came into being　　　　 B. formed　　　　　　　　　　 C. found　　　　　　　　　　 D. set out

7. A. injured　　　　　　　　　　　　 B. hurt　　　　　　　　　　　　 C. harmed　　　　　　　　 D. destroyed

8. A. longer　　　　　　　　　　　　 B. farther　　　　　　　　　　 C. deeper　　　　　　　　　　 D. further

9. A. Quickly　　　　　　　　　　 B. Slowly　　　　　　　　 C. Soon　　　　　　　　　　 D. Immediately

10. A. school　　　　　　　　　　 B. factory　　　　　　　　　　　　 C. company　　　　　　　　 D. store

11. A. suggested　　　　　　　　 B. insisted　　　　　　　　　　 C. advised　　　　　　　　 D. wanted

12. A. farmers　　　　　　　　　　 B. workers　　　　　　　　 C. people　　　　　　　　　　 D. salesmen

13. A. of　　　　　　　　　　　　　　 B. for　　　　　　　　　　　　 C. with　　　　　　　　　　　　 D. by

14. A. other　　　　　　　　　　　　 B. the other　　　　　　　　 C. others　　　　　　　　　　 D. another

15. A. worked　　　　　　　　　　 B. studied　　　　　　　　　　 C. borrowed　　　　　　　　 D. offered

16. A. often　　　　　　　　　　　　 B. regularly　　　　　　　　 C. usually　　　　　　　　　　 D. always

17. A. went out　　　　　　　　 B. died　　　　　　　　　　　　 C. gave in　　　　　　　　　　 D. married

18. A. still　　　　　　　　　　　　 B. yet　　　　　　　　　　　　 C. already　　　　　　　　　　 D. seldom

19. A. many　　　　　　　　　　 B. same　　　　　　　　　　 C. such　　　　　　　　　　 D. few

20. A. certain　　　　　　　　　　 B. some　　　　　　　　　　 C. any　　　　　　　　　　　　 D. no