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题目 #13200

UUID
0c003282-0fe9-4460-a275-bc72729b2744
来源
A中考/2026江苏中考期末数学试卷+答案130.pdf 第 4-5 页,bbox [30.0, 636.58, 453.0, 198.59]
题型 / 学科
single_choice / math / JUNIOR
知识树
KT_JUNIOR_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: D

最终题干渲染(f_body 预览)

从−2, −1,1,2这四个数中, 任取两个不同的数作为一次函数y = kx + b的系数 k、b,所得一次函数 y = kx + b 的图象不经过第四象限的概率是().
(B)2 9 (C)2 3 (D)1 3 Col1

A. 1 6 1 12
B. 1 3
C. 1 2
D.

答案 / 解析

答案(f_answer)

C

解析(f_ways)

从−2, −1, 1, 2中任取两个不同的数作为k、b,共有A₄^2=12种等可能结果。一次函数y=kx+b的图象不经过第四象限,需满足:①k>0且b≥0;②k<0且b≤0。但b不能为0(因0不在集合中),故实际条件为:(k>0且b>0)或(k<0且b<0)。集合中正数为{1,2},负数为{−1,−2}。当k∈{1,2}、b∈{1,2}时,有\(2\times 1=2\)种;当k∈{−1,−2}、b∈{−1,−2}时,有\(2\times 1=2\)种。合计满足条件的结果数为4种。因此所求概率为4/12=1/3。

原图与资产(0)

该题没有裁出图片资产

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 1.000
SOLVER blind-solver PASS 1.000
CRITIC critic PASS 1.000
SYMBOLIC symbolic-auditor WARN 0.500
RETRO_REPAIR retro-deterministic FAIL 0.300
COHERENCE coherence-auditor FAIL 0.900
QUALITY_GATE quality-gate FAIL 0.950
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 1.000
RETRO_REPAIR retro-deterministic FAIL 0.300
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
2026-09-22 18:45:23PUBLISHERROR发布失败: 正式发布门禁:选项内容为空: D
2026-09-22 18:45:23QAINFOQA: PASS (score=0.950)
2026-09-22 18:35:55FORMULAWARN公式转换未确认,保留原文本: stem