A.
| B.
| ||||||||
C.
| D.
|
1 |
c+d |
5x-2y |
3xy |
A.不变 | B.扩大为原来的4倍 | ||
C.缩小为原来的
| D.扩大为原来的8倍 |
a-b |
2ab |
A.扩大为原来的2倍 | B.不变 | ||||
C.缩小为原来的
| D.缩小为原来的
|
3x |
x+y |
( ) |
5(x+y) |
( ) |
ab |
a2+ab |
a2b |
x2-9y2 |
x2-3xy |
x+3y |
( ) |
0.5x-1 |
0.3x+2 |
z |
xy |
z2 |
xyz |
axy |
abxy2 |
1 |
by |
1 |
x+1 |
x-1 |
x2+1 |
x-1 |
x2-2x+1 |
1 |
x-1 |
© 2017-2019 超级试练试题库,All Rights Reserved.