AR |
2RB |
CP |
2PR |
AP |
AB |
nAC |
A.
| B.
| C.
| D.1 |
AR |
2RB |
CP |
2PR |
AP |
AR |
RP |
RB |
RP |
CR |
PC |
RC |
RP |
AP |
AP |
nAC |
RB |
RP |
AR |
RB |
RB |
RP |
RB |
RP |
|
|
4 |
9 |
1 |
3 |
7 |
9 |
AC |
a |
BD |
b |
AE |
a |
b |
A |
B |
C |
0 |
A.2 | B.
| C.3 | D.
|
A.充分不必要条件 | B.必要不充分条件 |
C.充分必要条件 | D.既不充分又不必要条件 |
AP |
1 |
3 |
AB |
AC |
A.0<t<
| B.0<t<
| C.0<t<
| D.0<t<
|
AC |
AB |
AD |
A.ABCD为矩形 | B.ABCD是菱形 |
C.ABCD是正方形 | D.ABCD是平行四边形 |
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