A.
| ||||||||||||
B.
| ||||||||||||
C.
| ||||||||||||
D.
|
0.2x-0.03y |
0.5x+0.06y |
20x-3y |
50x+6y |
(
| ||
(
|
10x-4y |
5x+10r |
5a+20b |
50a-100b |
a+4b |
10a-2ob |
1 |
a |
1 |
b |
3a+5ab-3b |
a-3ab-b |
x+2 |
x-1 |
x2+3x+2 |
x2-1 |
a |
b |
2 |
3 |
a-b |
a+b |
6a2bc3 |
70ac2 |
6x2-6y2 |
3x2-6xy+3y2 |
a |
b |
c |
d |
a |
c |
b |
d |
a+b |
b |
c+d |
d |
a+b |
a-b |
c+d |
c-d |
© 2017-2019 超级试练试题库,All Rights Reserved.