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(2013•辽宁)已知函数f(x)满足f(x)=x2-2(a+2)x+a2,g(x)=-x2+2(a-2)x-a2+8.
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The boy doesn't know where he can find his mother 同义句转换
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Tina said she w____ see Yao Ming because he was hurt
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