A.-1 | B.1 | C.5 | D.-6 |
A.3a+3b=6ab | B.3y2-2y2=1 | ||||
C.-
| D.2x2+x3=5x5 |
A.m=-2,n=3 | B.m=2,n=3 | C.m=-3,n=2 | D.m=3,n=2 |
A.-(a+b-c)=-a+b-c | B.-2(a+b-3c)=-2a-2b+6c |
C.-(-a-b-c)=-a+b+c | D.-(a-b-c)=-a+b-c |
A.-8-5=-3 | B.4a+3b=7ab | C.x5-x4=x | D.-2-(-7)=5 |
A.a与-
| B.x2y3z与-x2y3 | ||
C.x2与y2 | D.
|
© 2017-2019 超级试练试题库,All Rights Reserved.