a |
b |
π |
3 |
a |
b |
a |
a |
b |
A.
| B.
| C.
| D.
|
a |
a |
b |
a |
b |
π |
3 |
a |
b |
a |
a |
b |
a |
a |
b |
π |
3 |
a |
b |
(
|
4+4+4×2×1×cos
|
3 |
| ||||||
|
|
6 | ||
2×2
|
| ||
2 |
π |
6 |
a |
b |
a |
b |
a |
b |
b |
a |
b |
A.150° | B.120° | C.60° | D.30° |
e1 |
e2 |
π |
3 |
a |
e1 |
e2 |
b |
e1 |
e2 |
OA |
OC |
7 |
OB |
OC |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
2 |
a |
a |
b |
a |
b |
A.30° | B.45° | C.90° | D.135° |
© 2017-2019 超级试练试题库,All Rights Reserved.