若s=a+bb-a,則b為( ?。?/h1>
s
=
a
+
b
b
-
a
a + as s + 1 | a - as s + 1 | a + as s - 2 | a + as s - 1 |
【考點(diǎn)】比例的性質(zhì).
【答案】D
【解答】
【點(diǎn)評】
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發(fā)布:2024/4/20 14:35:0組卷:149引用:2難度:0.7