A.a=(0,0),b=(1,-2) | B.a=(1,-2),b=(2,-4) |
C.a=(3,5),b=(6,10) | D.a=(2,-3),b=(6,9) |
a |
1 |
2 |
b |
A.
| B.
| ||||||||||||
C.
| D.
|
a |
a |
A.(-1,1) | B.(1,-1) | C.(-1,-1) | D.(1,1) |
OA |
a |
OB |
b |
OP |
p |
p |
| ||
|
|
| ||
|
|
A.∠AOB平分线所在直线上 | B.线段AB中垂线上 |
C.AB边所在直线上 | D.AB边的中线上 |
a |
b |
a |
b |
A.2 | B.2
| C.2
| D.10 |
F1 |
F2 |
S |
A.1 | B.2 | C.lg2 | D.lg5 |
© 2017-2019 超级试练试题库,All Rights Reserved.