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如果a+
1
a
=2
,那么a2+
1
a
2
的值是(  )

A:2

B:4

C:0

D:-4

上一题 下一题 0.0难度 选择题 更新时间:2011-07-04 06:37:32

答案(点此获取答案解析)

A

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