A.(x-3)/9=(y-1)/1=(z-1)/1 B.(x-3)/9=(y-

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问题 A.(x-3)/9=(y-1)/1=(z-1)/1B.(x-3)/9=(y-1)/1=(z-1)/(-1)C.(x-3)/9=(y-1)/(-1)=(z-1)/1D.(x-3)/(-9)=(y-1)/1=(z-1)/1

选项 A.(x-3)/9=(y-1)/1=(z-1)/1
B.(x-3)/9=(y-1)/1=(z-1)/(-1)
C.(x-3)/9=(y-1)/(-1)=(z-1)/1
D.(x-3)/(-9)=(y-1)/1=(z-1)/1

答案 B

解析
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