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

题目

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

相似考题
参考答案和解析
答案:A
解析: