7.將一張坐標(biāo)紙折疊一次.使得點(diǎn)M重合.則與點(diǎn)P重合的點(diǎn)的坐標(biāo)是 A. B. C. D. 查看更多

 

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將一張坐標(biāo)紙折疊一次,使得點(diǎn)(4,0)與點(diǎn)(0,-4)重合,且點(diǎn)(2008,2009)與點(diǎn)(m,n)重合,則n-m=
 

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將一張坐標(biāo)紙折疊一次,使得點(diǎn)(4,0)與點(diǎn)(0,-4)重合,且點(diǎn)(2008,2009)與點(diǎn)(m,n)重合,則n-m=______.

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將一張坐標(biāo)紙折疊一次,使得點(diǎn)(4,0)與點(diǎn)(0,-4)重合,且點(diǎn)(2008,2009)與點(diǎn)(m,n)重合,則n-m=   

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將一張坐標(biāo)紙折疊一次,使得點(diǎn)(0,2)與點(diǎn)(4,0)重合,點(diǎn)(7,3)與點(diǎn)(m,n)重合,則m+n=(  )
A.4B.6C.D.

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將一張坐標(biāo)紙折疊一次,使得點(diǎn)(4,0)與點(diǎn)(0,-4)重合,且點(diǎn)(2008,2009)與點(diǎn)(m,n)重合,則n-m=________.

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