-a |
xy2 |
3m |
-n2 |
-n |
ac |
-m |
-n3 |
-a |
xy2 |
a |
xy2 |
3m |
-n2 |
3m |
n2 |
-n |
ac |
n |
ac |
-m |
-n3 |
m |
n3 |
a |
xy2 |
3m |
n2 |
n |
ac |
m |
n3 |
-14a2bc3 |
21a3bc |
9-m2 |
m+3 |
2x-y |
x |
1 |
3 |
2x-y |
x |
2y |
2x-3y |
A.扩大3倍 | B.不变 | C.缩小3倍 | D.扩大6倍 |
m2-3m |
m2-9 |
A.-
| B.
| C.
| D.
|
3x |
x-y |
A.不变 | B.是原来的4倍 | ||||
C.是原来的
| D.是原来的
|
© 2017-2019 超级试练试题库,All Rights Reserved.