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题目 #15070

UUID
3b06394d-144c-43f8-9df2-f42b8fa0425c
来源
A中考/2026江苏中考期末数学试卷+答案265.pdf 第 3 页,bbox [30.0, 454.06, 537.12, 682.05]
题型 / 学科
single_choice / math / JUNIOR
知识树
KT_JUNIOR_MATH_STANDARD
难度
难度 5 / 5 最难 · 复杂推理/计算
QA 状态
存疑 / 待修复 重试 0 次,得分 0.825
最终题 ID
-
错误
发布失败: 正式发布门禁:选项内容为空: D

最终题干渲染(f_body 预览)

体育测试中, 小进和小俊进行800米跑测试, 小进的速度是小俊的1.25倍,小进比小俊少用40秒 ,设小俊速度是 x 米/秒,则所列方程正确的是().
A. \(40 \times 1.25x = 40\)
B. _{x}− _{1.25x}=\(40 _{x}\)− _{2.25x}= 40
C. _{1.25x}− _{x}= 40\(80\frac{800}{800}0 80\frac{800}{800}0\)
D.

答案 / 解析

答案(f_answer)

B

解析(f_ways)

设小俊的速度为\(x\)米/秒,则小进的速度为 \(1.25x\) 米/秒。跑800米,小俊所用时间为\(\frac{800}{x}\)秒,小进所用时间为\(\frac{800}{1.25x}\)秒。根据题意,小进比小俊少用40秒,即小俊的时间减去小进的时间等于40秒,列出方程:\(\frac{800}{x} - \frac{800}{1.25x} = 40\)。对比选项,B选项的表达式\(\frac{800}{x} - \frac{800}{1.25x} = 40\)与此方程一致,因此正确。

原图与资产(1)

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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 FAIL 0.600
SOLVER blind-solver PASS 1.000
CRITIC critic PASS 1.000
SYMBOLIC symbolic-auditor WARN 0.500
COHERENCE coherence-auditor FAIL 0.800
QUALITY_GATE quality-gate FAIL 0.825
SOLVER blind-solver PASS 1.000
CRITIC critic PASS 1.000
COHERENCE coherence-auditor PASS 0.900
SYMBOLIC symbolic-auditor PASS 1.000
AUTO_REPAIR_ATTEMPT answer-repair PASS 1.000
AUTO_REPAIR answer-repair PASS 1.000
VISION vision-auditor PASS 0.950
RETRO_REPAIR retro-deterministic FAIL 0.300
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
2026-09-23 06:03:27PUBLISHERROR发布失败: 正式发布门禁:选项内容为空: D
2026-09-23 06:03:27QAINFOQA: PASS (score=0.825)
2026-09-23 05:59:50FORMULAWARN公式转换未确认,保留原文本: option_C
2026-09-23 05:58:01FORMULAWARN公式转换未确认,保留原文本: option_B
2026-09-23 05:56:02FORMULAWARN公式转换未确认,保留原文本: option_A