可化简为
[
]|
A . |
B . |
C . |
D . |
将
[
]|
A . |
B . |
C . |
D . |
计算
[
]|
A . |
B . |
C . |
D . |
![]()
[
]|
A . |
B . |
C . |
D . |
下列运算式中正确的个数是
[
]|
① |
② |
|||
|
③ |
④ |
|||
|
A .0 |
B .1 |
C .2 |
D .3 |
|
下列计算中正确的是
[
]|
A . |
B . |
|
C . |
D . |
![]()
[
]|
A .3 |
B . |
C .9 |
D .81 |
设
m,n是实数,a,b是正实数,则下列各式中正确的有[
]①
|
A .3个 |
B .2个 |
C .1个 |
D .0个 |