______ make more interesting subjects for stories.
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理论上干细胞可以分化生长成人体所需的各种器官。()
The suggestion that parents are more aware of how advertisers try to sell products.
有以下程序
int fa(int x){return x*x;}
int fb(int x){return x*x*x;}
int f(int(*fl)(),int(*f2)(),int x}
{return f2(x)-f1(x);}
main()
{int i;i=f(fa,fb,2);printf("%d\n",i);}
程序运行后,输出结果是【 】。