AC |
a |
BD |
b |
AE |
a |
b |
AC |
a |
BD |
b |
AE |
AO |
OE |
1 |
2 |
a |
| ||||
2 |
1 |
2 |
a |
| ||||
4 |
3
| ||
4 |
1 |
4 |
b |
3 |
4 |
a |
1 |
4 |
b |
CD |
AB |
AC |
e |
a |
e |
a |
e |
a |
e |
A.充分不必要条件 | B.必要不充分条件 |
C.充分必要条件 | D.既不充分又不必要条件 |
a |
a |
b |
b |
b |
A.(1,
| B.(-1,
| C.(1,
| D.(-1,-
|
OP |
OA |
5 |
A.x-2y+5=0 | B.x+2y-5=0 | C.x+2y+5=0 | D.x-2y-5=0 |
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