Much research has been carried out in order to establish the causes of cance

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• Much research has been carried out in order to establish the causes of cance
• 英语翻译For many years,the “one couple,one child” policy has been carried out in China and it has proved to be an effective way to control the rapid growth of the population in our country.However,the advantages are often accompanied by some disadvantages.For example,the only child becomes the center or even the “emperor” of the family.In order to provide a bright future for the only child,many parents or grand parents show too much love to them.They do a
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• 函数f(x)=2X*(ax方+bx+c)满足f(x+1)-f(X)=2*乘以x的平方（X属于R）求常数a b c的值