用简便方法计算,选出正确答案.
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A . |
B .0 |
|
C .2 |
D . |
用简便方法计算,选出正确答案.
![]()
=
[
]|
A . |
B .0 |
|
C .2 |
D . |
用简便方法计算,选出正确答案。
![]()
=
[
]|
A . |
B .0 |
|
C .2 |
D . |
用简便方法计算,选出正确答案.
![]()
=
[
]|
A . |
B .0 |
|
C .2 |
D . |
![]()
=
[
]|
A . |
B . |
|
C . |
D . |