A.x2+(y-2)2=1 | B.x2+(y+2)2=1 |
C.(x-1)2+(y-3)2=1 | D.x2+(y-3)2=1 |
A.(-∞,-2) | B.(-∞,-1) |
C.(1,+∞) | D.(2,+∞) |
A.(x-2)2+(y+1)2=1 | B.(x-2)2+(y+1)2=4 |
C.(x+4)2+(y-2)2=4 | D.(x+2)2+(y-1)2=1 |
A.x2+y2-2x+4y=0 | B.x2+y2+2x+4y=0 |
C.x2+y2+2x-4y=0 | D.x2+y2-2x-4y=0 |
© 2017-2019 超级试练试题库,All Rights Reserved.