In ancient times wealth was measured and exchanged in things that could be touched:food,tools,and precious metals and stones.Then the barter system was replaced by coins,which still had real value since they were pieces of rare metal.Coins were followed by fiat money,paper notes that have value only because everyone agrees to accept them. Today electronic monetary systems are gradually being introduced that will transform money into even less tangible forms,reducing it to a series of“bits and bytes”,or units of computerized information,going between machines at the speed of light.Already,electronic fund transfer allows money to be instantly sent and received by different banks,companies,and countries through computers and telecommunications devices. Which of the following would be the most appropriate title for the passage

单选题

Since ancient times people have found various ways to preserve meat.

答案解析

单选题

in very ancient times．Probably the first to use it were the Chinese,way back in the eleventh century B.C.We know that the umbrella was used in ancient Egypt and Babylon as a sunshade．And there was a strange thing connected with its use:it became a symbol of honor and authority．In the Far East in ancient times,the umbrella was allowed to be used only by royalty or by those in high office.In Europe,the Greeks were the first to use the umbrella as a sunshade．And the umbrella was in common use in

答案解析

单选题

in very ancient times．Probably the first to use it were the Chinese,way back in the eleventh century B.C.We know that the umbrella was used in ancient Egypt and Babylon as a sunshade．And there was a strange thing connected with its use:it became a symbol of honor and authority．In the Far East in ancient times,the umbrella was allowed to be used only by royalty or by those in high office.In Europe,the Greeks were the first to use the umbrella as a sunshade．And the umbrella was in common use in

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