PA |
PB |
PA |
PB |
PA |
PB |
PC |
1 |
3 |
PA |
2 |
3 |
PB |
PC |
A.
| B.
| C.
| D.
|
PC |
1 |
3 |
PA |
2 |
3 |
PB |
PA |
PB |
PA |
PB |
PC |
1 |
9 |
PA |
4 |
9 |
PB |
4 |
9 |
PA |
PB |
1 |
9 |
PA |
4 |
9 |
PB |
16 |
9 |
3 |
9 |
PA |
16 |
9 |
PA |
0 |
PC |
4 |
3 |
| ||
2 |
1 |
2 |
a |
b |
a |
A.
| B.
| C.
| D.
|
(BC |
AB |
AB |
AC |
BC |
OM |
3 |
4 |
OA |
1 |
8 |
OB |
1 |
8 |
OC |
A.与平面ABC平行 | B.是平面ABC的斜线 |
C.是平面ABC的垂线 | D.在平面ABC内 |
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