A.ab2与-
| B.xy3与x2y2 | ||
C.x2与y2 | D.3与-5 |
1 |
2 |
A.3xy与-3yz | B.2xy2与2x2y | C.2x与x2 | D.xy与-3πxy |
A.6a-5a=1 | B.a2+a2=a4 |
C.3a2b-4ba2=-a2b | D.3a2+2a3=5a5 |
A.与字母a,b都有关 | B.只与a有关 |
C.只与b有关 | D.与字母a,b都无关 |
A.3x2+2x3=5x5 | B.3a+2b=5ab |
C.4x2y-5yx2=-x2y | D.a+a=a2 |
A.2x+3y=5xy | B.5a2-3a2=2 |
C.4a2b-5ab2=-ab | D.x2+x2=2x2 |
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