71. What is the main purpose of the passage ?
A To challenge people’s fixed concept of the tomato
B To give an explanation to people’s dislike of the  tomato
C  To present the change of people’s attitudes to the tomato
D  To show the process of freeing the tomato from religious influence
                           E
  In his 1930 essay “Economic Possibilities for Our Grandchildren “, John Keynes, acconmist, ewrote that human needs fall into two classes: absolute needs ,which are indupe what other have , and relative needs ,which make us feel superior to our fellows He thought alough  relative needs may indeed be  insatible (无止境的) this isnottrue ofabsolute
   Keynes  wans surely  correct  that only a small part of total spending id decided by the  super iority He  was gretly  mistaken ,however ,in  seeting this desive as the only source of demands
      Decisions to spend are also driven by ideas of quality which can influnce the den almost all goods, including even basic goods like food. When a couple goes out for an anm dinner,for example,the thought of feeling superior to others probably never comes to them. The goal is to share a special meal that stands out from other meals.
There are no obvious limits to the escalation of demand for quality.For example ,porsche famous car producer,has a model which was considered perhaps the best sport car on the mark Priced at over $120,000,it handles perfectly well and has great speen acceleration.But in 200 the producer introduced some changes which made the model slightly better in handling acceleration.People who really care about cars find these small improvemenmts exciting.To them,however,they must pay almost four times the price.
By placing the desire to be superior to other at the heart of his description of nisation demands,Keynes actually reduced such demands.However,the desire for higher quality has natural limits.
72.According to the passage,John Keynes Believed that_______.
A.desire is the root of both absolute and relative needs
B.absolute needs come from our sense of superiority
C.relative needs alone lead to insatiable demands
D.absolute needs are stronger than relative needs
73.What do we know about the couble in Paragraph 3?
A.They want to show their superiority
B.They find specialty important to meals
C.Their demands for food are not easily satisfied.
D.Their choice of dinner is related to ideas of quality.
74.What does the underlined word “escalation”in Paragraph 4 probably mean?
A.Understanding.
B.Increase
C.Difference
D.Study

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