应该选B.X²+y²≤2x+2y,X²-2x+y²-2y ≤ 0 ,X²-2x+1+y²-2y+1 ≤2,
(X-1)² +(y-1)²≤2,又因为X,Y为整数,所以X,Y的取值均为0,1,2.即为(0,0),(0,1),(0,2),(1,0),(1,1),(1,2),(2,0),(2,1),(2,2)
应该选B.X²+y²≤2x+2y,X²-2x+y²-2y ≤ 0 ,X²-2x+1+y²-2y+1 ≤2,
(X-1)² +(y-1)²≤2,又因为X,Y为整数,所以X,Y的取值均为0,1,2.即为(0,0),(0,1),(0,2),(1,0),(1,1),(1,2),(2,0),(2,1),(2,2)