a |
3 |
b |
1 |
2 |
| ||
2 |
a |
b |
a |
b |
c |
a |
b |
d |
a |
b |
c |
d |
a |
3 |
b |
1 |
2 |
| ||
2 |
a |
b |
a |
b |
a |
a |
b |
b |
c |
d |
c |
d |
a |
b |
a |
b |
a |
a |
b |
a |
b |
b |
1±
| ||
2 |
a |
b, |
c |
a |
b |
c |
0 |
a |
b |
c |
a |
b |
a |
a |
b |
c |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
x |
a |
b |
y |
1 |
k |
a |
1 |
t |
b |
x |
y |
x |
y |
a |
b |
a |
3 |
4 |
b |
a |
3 |
4 |
b |
A.垂直 | B.平行 | ||
C.夹角为
| D.不平行也不垂直 |
© 2017-2019 超级试练试题库,All Rights Reserved.