A.平行 | B.垂直 |
C.相交但不垂直 | D.与n的值有关 |
3 |
2 |
2 |
3 |
A.y-a=0 | B.y+a=0 | C.x-a=0 | D.x+a=0 |
A.A(x-x0)+B(y-y0)=0 | B.A(x-x0)-B(y-y0)=0 |
C.B(x-x0)+A(y-y0)=0 | D.B(x-x0)-A(y-y0)=0 |
PF1 |
PF2 |
2 |
ON |
OM |
1 |
2 |
PA |
2 |
PF2 |
i |
j |
a |
i |
j |
b |
i |
j |
a |
b |
OP |
OA |
OB |
© 2017-2019 超级试练试题库,All Rights Reserved.