A.ab与7a | B.-xy2与
| ||
C.x3与23 | D.7与-
|
1 |
4 |
1 |
3 |
A.1 | B.-1 | C.0 | D.0或1 |
A.0.2x2y3与0.2x3y2 | B.-125与12 |
C.4abc与4ac | D.m2与-n2 |
A.3b3-(2ab2+4a2b-a3) | B.3b3-(2ab2+4a2b+a3) |
C.3b3-(-2ab2+4a2b-a3) | D.3b3-(2ab2-4a2b+a3) |
A.2xy,2xyz | B.-ab,
| C.4ay2,
| D.m2y,3m2 |
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