A.3x+4y-1=0 | B.3x+4y+1=0或3x+4y-9=0 |
C.3x+4y+9=0 | D.3x+4y-1=0或3x+4y+9=0 |
|m-4| |
5 |
A.y=±
| B.y=
| ||||||
C.y=±
| D.y=-
|
A.x-y+1=0 | B.x-y+1=0或3x-2y=0 |
C.x+y-5=0 | D.x+y-5=0或3x-2y=0 |
x2 |
a2 |
y2 |
b2 |
| ||
2 |
10 |
A.a=0或a=3或a=-1 | B.a=0或a=3 |
C.a=3或a=-1 | D.a=0或a=-1 |
A.x+2y+3=0 | B.x-2y+5=0 | C.x+2y-3=0 | D.2x-y+4=0 |
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