A.(2,-3)、r=13 | B.(2,-3)、r=
| C.(2,3)、r=
| D.(-2,3)、r=13 |
13 |
A.圆心P(1,3),半径r=10 | B.圆心P(1,3),半径r=
| ||
C.圆心P(1,-3),半径r=10 | D.圆心P(1,-3),半径r=
|
A.(-2,0),2 | B.(-2,0),4 | C.(2,0),2 | D.(2,0),4 |
A.(-2,3),1 | B.(2,-3 ),2 | C.(-2,3),2 | D.(2,-3 ),
|
A.x2+y2+2x=0 | B.x2+y2+x=0 | C.x2+y2-x=0 | D.x2+y2-2x=0 |
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 |
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