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_ 小题1:__ People use money to buy food, furniture, books, bicycles and hundreds of other things they need or want.When they work, they usually get paid in money.
Most of the money today is made of metal or paper.__小题2:__ One of the first kinds of money was shells.
Shells were not the only things used as money.In China,cloth and knives were used.In the Philippine Islands,rice was used as money for a long time.Elephant tusks,monkey tails and salt were used as money in parts of Africa.
The first metal coins were made in China.They were round and had a square hole in the centre.__小题3:__
Different countries have used different metals and designs for their money.__小题4:__ Sweden and Russia used copper to make their money.Later some countries began to make coins of gold and silver.
But even gold and silver were inconvenient if you had to buy something expensive.Again the Chinese thought of a way to improve money.__小题5:__ The first paper money looked more like a note from one person to another than the paper money used today.
Money has had an interesting history from the days of shell money until today.
_ 小题1:__ People use money to buy food, furniture, books, bicycles and hundreds of other things they need or want. When they work, they usually get paid in money.
Most of the money today is made of metal or paper. __小题2:__ One of the first kinds of money was shells.
Shells were not the only things used as money. In China,cloth and knives were used. In the Philippine Islands,rice was used as money for a long time. Elephant tusks,monkey tails and salt were used as money in parts of Africa.
The first metal coins were made in China. They were round and had a square hole in the centre. __小题3:__
Different countries have used different metals and designs for their money. __小题4:__ Sweden and Russia used copper to make their money. Later some countries began to make coins of gold and silver.
But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money. __小题5:__ The first paper money looked more like a note from one person to another than the paper money used today.
Money has had an interesting history from the days of shell money until today.
A.The first coins in England were made of tin(锡).
B.But people used to use all kinds of things as money.
C.No one knows for certain when people began to use money.
D.People strung(串连) them together and carried them from place to place.E. Money, as we know,is all made of paper.
F. They began to use paper money.
G. Today anyone will accept money in exchange for goods and services.

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题目标签:串连
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【单选题】下列关于字符串连接运算"+"和"&"的叙述正确的是()

A.
"&"两旁要求均为字符串
B.
"+"两旁不管是字符型还是数值型,系统都将操作数转换成字符型,再连接
C.
"&"与"+"都要求两旁必须为字符串
D.
若在字符串变量名后使用"&",则在变量名与"&"之间应有一个空格