题目内容
当x=3,y=-
时,
x-
y的值是( )
| 1 |
| 2 |
| 2 |
| 3 |
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| 2 |
A.1
| B.2
| C.2
| D.3 |
当x=3,y=-
时,原式=
×3-
×(-
)=2
.
故选B
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| 3 |
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| 2 |
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| 2 |
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| 4 |
故选B
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题目内容
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A.1
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| C.2
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