【文章內(nèi)容簡介】 fish for bananas, for example, a lot would depend on whether the person willing to exchange bananas is or not keen on fish.Thirdly, money acts as a store of wealth. It is difficult to imagine saving under a barter system. No one engaged on only one stage in the manufacture of a person could save part of his output, since he would be producing nothing plete. Even when a person actually produced a plete product the difficulties would be overwhelming. Most products deteriorate fairly rapidly, either physically or in value, as a result of long storage。 even if storage were possible, the practice of storing products for years on would involve obvious disadvantagesimagine a coalminer attempting to save enough coal, which of course is his product, to keep him for life. If wealth could not be saved, or only with great difficulty, future needs could not be provided for, or capital accumulated to raise productivity.41. Using money as a medium of exchange means that______.A. you have to sell something in order to buy somethingB. you have to buy something in order to sell somethingC. you don’t have to buy something in order to sell somethingD. the seller and the purchaser are the same person42. Specialization is encouraged because people______.A. can use their money to buy whatever they wantB. do not need to make a plete product for exchangeC. can share their products with many others D. cannot use their money to buy whatever they want43. A barter economy is one in which______.A. value is decided by weightB. value is decided by numberC. money is used goods are not exchangedD. goods are exchanged and money is not used44. If one had to save products instead of money, ______.A. this would need years of practiceB. he could only save part of his productsC. they could not be stored for years on endD. many products would lose their value45. How many advantages of money are mentioned in this passage?A. TwoB. ThreeC. FourD. FivePassage threeTalk to those people who first saw films when they were silent, and they will tell you the experience was magic. The silent film had extraordinary powers to draw members of an audience into the story, and an equally potent capacity of make their imaginations work. It required the audience to bee engagedto supply voices and sound effects. The audience was the final, creative contributor to the process of making a film.The finest films of the silent era depended on two elements that we can seldom provide todaya large and receptive audience and a wellorchestrated score. For the audience, the fusion of picture and live music added up to more than the sum of the respective parts.The one word that sums up the attitude of the silent filmmakers is enthusiasm, conveyed most strongly before formulas took shape and when there was more room for experimentaion. This enthusiastic uncertainty often resulted in such accidental discoveries as new camera or editing techniques. Some films experimented with players。 the 1915 film Regeneration, for example, by using real gangsters and streetwalkers, provided startling local color. Other films, particularly those of Thomas Ince, provided tragic endings as often as films by other panies supplied happy ones.Unfortunately, the vast majority of silent films survive today in inferior prints that no longer reflect the care that the original technicians put into them. The modern versions of silent films may appear jerky and flickery, but the vast picture palaces did not attract four to six thousand people a night by giving them eyestrain. A silent film depends on its visuals。 as soon as you degrade those, you lose elements that go far beyond the image on the surface. The acting in silents was often very subtle and very restrained, despite legends to the contrary.46. In paragraph 2, the sentence “For the audience…parts.”indicates that______.A. music was the most important