MA1 |
MA2 |
MA3 |
MA4 |
MA5 |
0 |
A.0 | B.1 | C.5 | D.10 |
MA1 |
MA2 |
MA3 |
MA4 |
MA5 |
0 |
x1+x2+x3+x4+x5 |
5 |
y1+y2+y3+y4+y5 |
5 |
a |
b |
1 |
12 |
a |
b |
a |
b |
A.(5,0) | B.(5,-10) | C.(4,-2) | D.(-4,2) |
AB |
BC |
CD |
A.长方形 | B.梯形 | C.平行四边形 | D.以上都不对 |
AB |
DF |
CD |
BC |
A.
| B.
| C.
| D.
|
BA |
CA |
DA |
BC |
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