问题:
圆x 2+y 2-2x-2y+1=0被直线x-y-1=0截得的弦长为
[ ]
A.
B.1
C.
D.
圆x 2+y 2-2x-2y+1=0被直线x-y-1=0截得的弦长为
B.1
C.
D.
[ ]
A.B.1
C.
D.
参考答案: