AB |
BC |
3 |
2 |
3
| ||
2 |
AB |
BC |
A.[
| B.[
| C.[
| D.[
|
AB |
BC |
AB |
BC |
AB |
BC |
3 |
cosθ |
1 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3
| ||
2 |
3 |
π |
4 |
π |
3 |
a |
b |
a |
b |
a |
b |
a |
A.9 | B.10 | C.12 | D.13 |
a |
b |
a |
b |
A.相交但不过圆心 | B.相交且过圆心 |
C.相切 | D.相离 |
a |
b |
c |
a |
c |
b |
c |
π |
6 |
α-β |
2 |
a |
b |
3 |
a |
b |
3 |
a |
b |
OC |
AB |
AC |
BC |
OA |
OC |
13 |
OB |
OC |
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