a |
7 |
s |
t |
A.3 | B.4 | C.5 | D.6 |
a |
7 |
s |
t |
a |
7 |
A.
| B.-3x3y的次数是4 | ||
C.4ab与4xy是同类项 | D.
|
A.a+b | B.0 | C.x-
| D.
|
x2+5 |
3 |
5 |
x |
1 |
x2 |
A.3 | B.4 | C.5 | D.6 |
1 |
y |
x |
y |
a-b |
2 |
3 |
π |
A.3 | B.4 | C.6 | D.5 |
A.3a2bc与bca2不是同类项 | ||
B.
| ||
C.单项式-x3y2的系数是-1 | ||
D.3x2-y+5xy2是二次三项式 |
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