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题目 #20942

UUID
815b826a-63d4-43e3-ab51-d7f75324c1d6
来源
人教版/七下/2026江苏七年级期末数学试卷+答案375.pdf 第 1-2 页,bbox [30.22, 644.79, 341.68, 117.88]
题型 / 学科
single_choice / math / SENIOR
知识树
KT_SENIOR_MATH_STANDARD
难度
难度 2 / 5 简单 · 单一知识点
QA 状态
存疑 / 待修复 重试 0 次,得分 0.950
最终题 ID
-
错误
发布失败: 正式发布门禁:选项内容为空: B

最终题干渲染(f_body 预览)

下列说法: ①如果一个数的立方根等于它本身,那么它一定是1或0;②平 方根和立方根都等于它自身的数是1和0;③互为相反数的两 个数的立方根也是互为相反数;④一个数的算术平方根一 定是正数;⑤| −4|没有平方根.其中正确的个数是(      )
A. \(\frac{1}{2}\)
B.
C. 3
D. 4 填空题,每题6分

答案 / 解析

答案(f_answer)

A

解析(f_ways)

①立方根等于本身的数有0、 1、 −1,但说法限定为1或0,漏了 −1,故①错误;②平方根等于本身的数只有0(因为平方根 定义,1的平方根为 ± 1 ≠1),立方根等于本身的数有0、 1、 −1,故 ②错误;③设a与b互为相反数,即b = −a,则3√b = 3√−a= −3√a,故互为相反数的两个数的立方根也是互为相反数,故 ③正确;④算术平方根定义为非负数,0的算术平方根为0,不 是正数,故④错误;⑤因为| −4| = 4, 4的平方根为 ± 2,所以 |−4|有平方根,故说法⑤错误.仅③正确,正确的个数为1个,故选:A.

原图与资产(0)

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审计记录

阶段审计器结果得分依据(简短)
STRUCTURE structure-rule PASS 0.900
FORMULA formula-auditor PASS 1.000
KNOWLEDGE knowledge-auditor WARN -
VISION vision-auditor PASS 0.950
SOLVER blind-solver PASS 0.950
CRITIC critic PASS 0.950
SYMBOLIC symbolic-auditor PASS 1.000
COHERENCE coherence-auditor PASS 1.000
QUALITY_GATE quality-gate PASS 0.950
RETRO_REPAIR retro-deterministic FAIL 0.300
RETRO_REPAIR retro-deterministic FAIL 0.300
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知识点(0)

无

事件

时间阶段级别消息
2026-09-24 21:16:58PUBLISHERROR发布失败: 正式发布门禁:选项内容为空: B
2026-09-24 21:16:58QAINFOQA: PASS (score=0.950)
2026-09-24 21:15:42FORMULAWARN公式转换未确认,保留原文本: solution
2026-09-24 21:11:42FORMULAWARN公式转换未确认,保留原文本: option_A