GWD--TN-5-9

sj33333

请教一个GWD题目
5-Q9:
In the xy-plane, the point (-2, -3) is the center of a circle.  The point (-2, 1) lies inside the circle and the point (4, -3) lies outside the circle.  If the radius r of the circle is an integer, then r =

A.    6
B.    5
C.    4
D.    3
E.    2

lipsilon

4<r<6, r =5,

求两个点到圆心的距离，一个大于R, 一个小于R