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a square hole in the center 的意思

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a square hole in the center 的意思
a square hole in the center 的意思
在中心的一个方孔
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再答: 现在的钱由什么所制?
为何人们开始使用纸币?
Besides milk and bread, we also need fruit
Many things can be made of woodsIt is used as teaching centerHe travelled from place to place and just returned home yesterdayI think he is wrong

再问: 现在的钱由什么所制? 为何人们开始使用纸币? 用英文回答
再答: 现在的钱由什么所制? Now, most money we use today is made of paper.(纸币) Besides ,there are also coins made of metal.(硬币) What's more, we also have electronic money.(电子货币) 为何人们开始使用纸币? Because metal used to make money is rarer and limited. Apart from that, metal money was always worn during circulation. So paper money appeared
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