a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
c |
a |
b |
c |
b |
c |
a |
a |
b |
c |
a |
b |
c |
b |
a |
c |
A.1个 | B.2个 | C.3个 | D.4个 |
a |
b |
a |
b |
a| |
|b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
b |
c |
a |
b |
c |
b |
c |
a |
a |
b |
c |
a |
b |
a |
c |
c |
x2 |
a2 |
y2 |
b2 |
MA |
MF |
BF |
a |
b |
c |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
AB |
BC |
A.1个 | B.2个 | C.3个 | D.4个 |
a |
b |
a |
b |
a |
b |
b |
a |
A.-
| B.-1 | C.
| D.1 |
a |
b |
a |
b |
a |
b |
A.1 | B.
| C.2 | D.3 |
a |
b |
c |
a |
b |
d |
a |
b |
c |
d |
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