a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
a |
b |
b |
a |
b |
(
|
|
4-2•2•3cos120°+9 |
19 |
19 |
a |
b |
a |
a |
b |
10 |
b |
a |
b |
u |
a |
b |
u |
A.
| B.1 | C.
| D.
|
a |
b |
a |
b |
b |
c |
c |
i, |
j |
AB |
i |
j |
AC |
i |
j |
A.1个 | B.2个 | C.3个 | D.4个 |
m |
m |
n |
m |
n |
n |
A.(a,-b) | B.(-a,b) | C.(b,-a) | D.(-b,-a) |
© 2017-2019 超级试练试题库,All Rights Reserved.