A. 2x+y+2=0 B. 2x-y+2=0 C. 2x+y-2=0

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问题 A. 2x+y+2=0 B. 2x-y+2=0 C. 2x+y-2=0 D. 2x-y-2=0

选项 A. 2x+y+2=0
B. 2x-y+2=0
C. 2x+y-2=0
D. 2x-y-2=0

答案 A

解析
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