The first telephone cards, produced in 1976, were Italian. Five years later the first Bri

The first telephone cards, produced in 1976, were Italian. Five years later the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are small and light and you do not need much space for them. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can only buy telephone cards, and some cards cost up to ￡4,000.The first Japanese card has a value of about ￡28,000. Most people only see cards with prices like these in their collectors’ magazine.
【小题1】 When were the first Italian telephone cards produced?
【小题2】How many countries can produce telephone cards now?
【小题3】Where can we find a market to buy telephone cards?
【小题4】What is the price of the first Japanese telephone card?
【小题5】In which magazine do most people see cards with prices?In 1976

(答案→)In 1976 解析： 略

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这个问题我还想问问老师呢

0 a -x+y解析分析：只有0的相反数是0，-a的相反数是a，x-y的相反数是-（x-y），根据以上内容填上即可．解答：∵只有0的相反数是0，
∴若x的相反数仍是x，
则x=0，
-a的相反数是a，
x-y的相反数是-（x-y）=-x+y，
故