a |
b |
a |
b |
A.
| B.13 | C.37 | D.
|
a |
b |
a |
a |
b |
b |
a |
b |
(
|
|
37 |
a |
b |
3 |
a |
b |
π |
6 |
a |
b |
A.
| B.2
| C.3
| D.
|
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
3 |
a |
b |
a |
b |
A.30° | B.60° | C.120° | D.150° |
a |
3 |
b |
3 |
a |
b |
A.30° | B.60° | C.120° | D.150° |
a |
b |
a |
b |
A.{x|x>-6} | B.{x|x<-6} | ||
C.{x|x≥-6} | D.{x|x>-6且x≠
|
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