81的平方根是_1，9的算术平方根是_2，﹣27的立方根是_3_刷题宝

题干

81的平方根是____ ，9的算术平方根是____ ，﹣27的立方根是____

上一题下一题 0.0难度选择题更新时间:2019-10-17 11:44:06

答案(点此获取答案解析）

±9,3,﹣3

同类题1

如图，在△ABC中，DE分别是AB，AC的中点，BE=2DE，延长DE到点F，使得EF=BE，连CF

（1）求证：四边形BCFE是菱形；

（2）若CE=6，∠BEF=120°，求菱形BCFE的面积．

同类题2

阅读理解。

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同类题3

如图所示，当滑动变阻器的滑片P移动时，能使线圈abcd（cd未画出）因电磁感应而沿顺时针方向绕O点转动，则P移动情况为（　　）

同类题4

如图是关节模式图，请根据下图回答问题：

同类题5

下列有关叙述正确的是（　　）

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