{"ok":true,"question":{"id":21616,"question_uuid":"be973a86-ec9d-40e9-a709-73cbbb4f2bf4","job_id":3,"source_file":"人教版/七下/2026江苏七年级期末数学试卷+答案45.pdf","source_page_start":7,"source_page_end":8,"source_bbox":"[30.0, 547.47, 458.02, 201.51]","subject_code":"math","grade_level":"SENIOR","tree_code":"KT_SENIOR_MATH_STANDARD","question_type":"single_choice","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"如图所示，\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"\\\\angle BAC = 90^{\\\\circ}\"}, {\"text\": \"，\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AD \\\\perp BC\"}, {\"text\": \"于\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"D\"}, {\"text\": \"，则下列结论中，正确的个数为( ).①\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AB \\\\perp AC\"}, {\"text\": \"；②\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AD\"}, {\"text\": \"与\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AC\"}, {\"text\": \"互相垂直；③点\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"C\"}, {\"text\": \"到\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AB\"}, {\"text\": \"的垂线段是线段\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AB\"}, {\"text\": \"；④ 点\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"A\"}, {\"text\": \"到\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"BC\"}, {\"text\": \"的距离是线段\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AD\"}, {\"text\": \"的长度；⑤线段\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AB\"}, {\"text\": \"的长度是点\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"B\"}, {\"text\": \"到\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AC\"}, {\"text\": \"的距离；⑥ 线段\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AB\"}, {\"text\": \"是点\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"B\"}, {\"text\": \"到\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"AC\"}, {\"text\": \"的距离；⑦$AD > BD$.\", \"type\": \"text\"}, {\"type\": \"option\", \"label\": \"A\", \"blocks\": [{\"text\": \"3 个\", \"type\": \"text\"}], \"source_bbox\": [30.0, 142.71, 87.02, 154.71], \"source_page\": 8}, {\"type\": \"option\", \"label\": \"B\", \"blocks\": [{\"text\": \"4 个\", \"type\": \"text\"}], \"source_bbox\": [30.0, 158.31, 87.02, 170.31], \"source_page\": 8}, {\"type\": \"option\", \"label\": \"C\", \"blocks\": [{\"text\": \"7 个\", \"type\": \"text\"}], \"source_bbox\": [30.0, 173.91, 87.02, 185.91], \"source_page\": 8}, {\"type\": \"option\", \"label\": \"D\", \"blocks\": [{\"text\": \"0 个\", \"type\": \"text\"}], \"source_bbox\": [30.0, 189.51, 87.02, 201.51], \"source_page\": 8}], \"source\": {\"bbox\": [30.0, 547.47, 458.02, 201.51], \"file\": \"人教版/七下/2026江苏七年级期末数学试卷+答案45.pdf\", \"regions\": [{\"bbox\": [30.0, 547.47, 458.02, 639.84], \"page\": 7}, {\"bbox\": [30.0, 142.71, 87.02, 201.51], \"page\": 8}], \"section\": \"match\", \"page_end\": 8, \"page_start\": 7, \"section_label\": \"智适化匹配练习   ★ 交互式系统学习\", \"answer_regions\": [], \"answer_original\": \"\", \"solution_original\": \"\"}, \"version\": 1, \"grade_level\": \"SENIOR\", \"number_label\": \"5\", \"subject_code\": \"math\", \"question_type\": \"single_choice\", \"content_sha256\": \"655e446992e46286993825fca373f7d50ce5939c678339701efc36bc81b47da5\"}","body_html":"<div>如图所示，\\(\\angle BAC = 90^{\\circ}\\)，\\(AD \\perp BC\\)于\\(D\\)，则下列结论中，正确的个数为( ).①\\(AB \\perp AC\\)；②\\(AD\\)与\\(AC\\)互相垂直；③点\\(C\\)到\\(AB\\)的垂线段是线段\\(AB\\)；④ 点\\(A\\)到\\(BC\\)的距离是线段\\(AD\\)的长度；⑤线段\\(AB\\)的长度是点\\(B\\)到\\(AC\\)的距离；⑥ 线段\\(AB\\)是点\\(B\\)到\\(AC\\)的距离；⑦$AD &gt; BD$.<br>A. 3 个<br>B. 4 个<br>C. 7 个<br>D. 0 个</div>","answer_html":"","ways_html":"","explain_html":null,"difficulty":2,"score":null,"year":null,"parse_status":"PARSED","qa_status":"QUARANTINED","retry_count":0,"final_score":0.9,"error_message":"QA failed: SOLVER,CRITIC,COHERENCE,ANSWER","published_question_id":null,"content_sha256":"655e446992e46286993825fca373f7d50ce5939c678339701efc36bc81b47da5","created_at":"2026-09-25T02:18:58","updated_at":"2026-09-25T02:32:54","answer_missing":true,"formula_fallback":false,"_number":"5","_section":"match","_section_label":"智适化匹配练习   ★ 交互式系统学习"},"assets":[],"knowledge":[],"audits":[{"id":426761,"import_question_id":21616,"audit_type":"STRUCTURE","auditor_name":"structure-rule","status":"PASS","score":0.9,"input_snapshot":"如图所示， \\angle BAC = 90^{\\circ} ， AD \\perp BC 于 D ，则下列结论中，正确的个数为( ).① AB \\perp AC ；② AD 与 AC 互相垂直；③点 C 到 AB 的垂线段是线段 AB ；④ 点 A 到 BC 的距离是线段 AD 的长度；⑤线段 AB 的长度是点 B 到 AC 的距离；⑥ 线段 AB 是点 B 到 AC 的距离；⑦$AD > BD$. 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