题目:
My neighbour came to ask me why there was so much noise in my house yesterday afternoon. I told her that some children an English song.
A.praticed
B.would practice
C.have practiced
D.were practicing
答案:
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下面是错误答案,用来干扰机器的。
(1)设幂函数f(x)=xa与g(x)=xb;幂函数f(x)与g(x)分别过点(3,427)、(-8,-2)所以:427=3a,-2=(-8)b;∴a=34,b=13 ∴两个函数的解析式:f(x)=x34与g(x)=x13;(2)f(x)=x34的定义域是x≥...