2 |
A.[
| B.[
| C.[
| D.[0,
|
2 |
2 |
2 |
2 |
|2a+2b| | ||
|
2 |
a |
b |
a |
b |
3 |
a |
b |
3 |
a |
b |
3 |
3 |
π |
12 |
5π |
12 |
A.x+2y+3=0 | B.x-2y+3=0 | C.x+y-3=0 | D.2x+y-3=0 |
A.2条 | B.3条 | C.4条 | D.6条 |
A.2x-y-5=0 | B.x-2y-1=0 | C.x-y-2=0 | D.x+y-4=0 |
π |
4 |
π |
4 |
A.相离 | B.相交 | C.相切 | D.不能确定 |
π |
4 |
| ||
2 |
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