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In the earliest stages of man's development he had nomore need of money than animals have.He was content with very simple forms of shelter,made his own rough tools and weapons and could provide food and clothing for himself and his family from natural materials around him.As he became more civilized,however,he began to want better shelter,more efficient tools and weapons,and more comfortable and more lasting clothing than could be provided by his own neighborhood or by the work of his own unskilled hands.For these things he had to turn to the skilled people such as smiths,leather workers or carpenters.It was then that the question of payment arose.

At first he got what he wanted by a simple process ofexchange.The smith who had not the time to look after land or cattle was glad to take meat or grain from the farmer inexchange for an axe or a plough.But as more and more goods which had no fixed exchange value came on the market,exchange became too complicated to be satisfactory.Another problem arose when those who made things wanted to get stocks of wood or leather,or iron,but had nothing to offer in exchange until their finished goods were ready. Thus the difficulties of exchange led by degrees to the invention of money.In some countries easily handled things like seeds or shells were given a certain value and the farmer,instead of paying the smith for a new axe by giving him some meat or grain,gave him so many shells.If the smith had any shells left when he had bought his food,he could get stocks of the raw materials of his trade.In some countries quite large things such as cows or camels or even big flat stones were used for trade.Later,pieces of metal,bearing values according to the rarity of the metal and the size of the pieces,or coins were used.Money as we know it had arrived.

1.Exchange of goods became difficult because _________.

A man became more civilized

B smiths began to look after land or cattle in their spare time

C more and more goods which had no fixed exchange alues came to the marker

D farmers hadn't enough grain or meat to provide for

skilled workers

2.Money was not used until _______.

A paper was invented

B people practiced a simple process of exchange

C nothing could be offered in exchangeD the exchange of one thing for another became too complicated

3.The best title for this passage is _____.

A What is money

B What are money's functions.

C The importance of money

D The beginning of money

时间:2020-05-14

人气:2068

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To begin with,"muzak"(音乐广播网 )was intended simplyto createasoothing(安慰)atmosphere.Recently,however,it's ecome big business —thanks in part to recentresearch.Dr.Ronald Milliman,an American marketing expert,hasshown that music can boost sales or increase factory roduction by as much as a third.But,it has to be light music.A fast one has no effect atall on sales.Slow music can increase receipts by 38%.This isprobably because shoppers slow down and have more opportunityto spot items they like to buy.Yet,slow music isn't alway sanswer.Dr.Milliman found,for example,that in restaurants slowmusic meant customers took longer to eat their meals,whichreduced overall sales.So restaurants owners might be welladvised to play up-tempo music to keep the customers moving—unless of course,the resulting indigestion leads tocomplaints!

练习:

1.The reason why background music is so popular isthat ______.

A.it can have a powerful effect on those who hear it

B.it can help to create a soothing atmosphere

C.it can boost sales or increase factory production erywhere

D.it can make customers eat their meals quickly

2.Background music means ________.

A.light music that customers enjoy mostB.fast music that makes people move fast

C.slow music that can make customers enjoy their meals

D.the music you are listening to while you are doingomething

3.Restaurant owners complain about background musicbecause ______.

A.it results in indigestion

B.it increases their sales

C.it keeps customers moving

D.it decreases their sales

4.The word"up-tempo music"probably means_____.

A.slow music

B.fast music

C.light music

D.classical music

时间:2020-05-14

人气:1498

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The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has , atthe same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of cancer is related to the diet as well, especially cancer the colon . Different cultures are more prone to contract certain illnesses because of the food that is characteristic in these cultures. That food related to llness is not a new discovery. In 1945 , government researchers realized that itrates and nitrites, commonly used to preserve color in meats, and other food dditives, caused cancer. Yet, these carcinogenic additives remain in our food, nd it becomes more difficult all the time to know which things on the pack ging labels of processed food are helpful or harmful.The additives which we eat are not all so direct. Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drugs are administered to animals not for medicinal purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to controlthese procedures, the practices continue.

48. What is the main topic of the passage?

A. Food and our health

B Food and additives

C. Food and cancer

D Food and culture

49 All of the following statements are true EXCEPT_______.

A Forty percent of cancer is caused by problems related to food.

B Researchers have known about the potential danger of food additivesfor many years

C. We eat some of the food additives directly and some indirectly

D Drugs are always given to animals for medicinal purposes

50. Why do farmers give drugs to their animals?

A. to speed up the growth of animals

B To make theanimals fatter

C to make the animals ’ meat fit to eat

D To make the animals’ meat rich in nutrients

51. It can be inferred from the passage that_________.

A scientist have made all the food fit to eat

B only in recent years have people found that the food is related to one’s illness

C all kinds of cancer are related to the diet

D some additives are harmful to our health

52. The word “ this ”in the second sentence of paragraph 2 most probablyrefers to __________.

A farmer

B penicillin

C beef and poultry

D the fact that farmers often give penicillin to a beef

时间:2020-05-14

人气:2791

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