题目内容
设
z=x-y,式中变量x和y满足条件[
]|
A .1 |
B .-1 |
C .3 |
D .-3 |
答案:A
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设
z=x-y,式中变量x和y满足条件[
]|
A .1 |
B .-1 |
C .3 |
D .-3 |
题目内容
设
z=x-y,式中变量x和y满足条件[
]|
A .1 |
B .-1 |
C .3 |
D .-3 |
设
z=x-y,式中变量x和y满足条件[
]|
A .1 |
B .-1 |
C .3 |
D .-3 |