如果式子 a−1 是二次根式，那么a的取值范围是( )_刷题宝

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如果式子 a−1 是二次根式，那么a的取值范围是( )

A：a≥1

B：a>1

C：a=1

D：a≤1

上一题下一题 0.0难度选择题更新时间:2014-05-30 02:23:28

答案(点此获取答案解析）

A

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