1 |
2 |
A.2 | B.-2 | C.
| D.-
|
1 |
2 |
1 |
2 |
-1 |
a |
1 |
2 |
A.2x-3y+10=0 | B.2x+3y+10=0 | C.2x+3y-10=0 | D.2x-3y-10=0 |
A.0 | B.1 | C.0或1 | D.1或2 |
A.3x-y-8=0 | B.3x+y+4=0 | C.3x-y+6=0 | D.3x+y+2=0 |
A.2,
| B.-2,-
| C.-
| D.-2,-3 |
A.2x-y+1=0 | B.2x-y-1=0 | C.x+2y-1=0 | D.x+2y+1=0 |
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