{"ok":true,"question":{"id":21727,"question_uuid":"4b18f7e3-1064-4e88-b1bb-2c27ab98cca2","job_id":3,"source_file":"人教版/七下/2026江苏七年级期末数学试卷+答案55.pdf","source_page_start":1,"source_page_end":1,"source_bbox":"[30.22, 251.27, 545.27, 382.32]","subject_code":"math","grade_level":"SENIOR","tree_code":"KT_SENIOR_MATH_STANDARD","question_type":"single_choice","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"如图，∠BAC= 90°，AD ⊥BC于D，则下列结论中，正确的个数为( ).①AB⊥ AC：②AD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AC的长度是点C到AB的距离;⑥线段CD的长度是点D到AC的距离．\", \"type\": \"text\"}, {\"kind\": \"embedded_image\", \"type\": \"figure\", \"width\": 520, \"height\": 276, \"sha256\": \"8ebdcf9b725e60d56c7fd843673dca23f6b17035408ceaa5c46dc41c9eef8741\", \"caption\": \"\", \"asset_key\": \"math/2026/09/2b06312b-7e3f-494e-ae3e-21d10207fcf7/4b18f7e3-1064-4e88-b1bb-2c27ab98cca2/8ebdcf9b725e.png\", \"public_url\": \"http://tikupdfpng.mtwlkj.net:5129/qbank/math/2026/09/2b06312b-7e3f-494e-ae3e-21d10207fcf7/4b18f7e3-1064-4e88-b1bb-2c27ab98cca2/8ebdcf9b725e.png\", \"source_bbox\": [30.21787452697754, 272.4592590332031, 126.67874908447266, 326.04864501953125], \"source_page\": 1}, {\"type\": \"option\", \"label\": \"A\", \"blocks\": [{\"text\": \"3个\", \"type\": \"text\"}], \"source_bbox\": [30.22, 346.59, 62.88, 354.76], \"source_page\": 1}, {\"type\": \"option\", \"label\": \"B\", \"blocks\": [{\"text\": \"4个\", \"type\": \"text\"}], \"source_bbox\": [30.22, 355.78, 62.88, 363.94], \"source_page\": 1}, {\"type\": \"option\", \"label\": \"C\", \"blocks\": [{\"text\": \"5个\", \"type\": \"text\"}], \"source_bbox\": [30.22, 364.96, 62.88, 373.13], \"source_page\": 1}, {\"type\": \"option\", \"label\": \"D\", \"blocks\": [{\"text\": \"6个\", \"type\": \"text\"}], \"source_bbox\": [30.22, 374.15, 54.72, 382.32], \"source_page\": 1}], \"source\": {\"bbox\": [30.22, 251.27, 545.27, 382.32], \"file\": \"人教版/七下/2026江苏七年级期末数学试卷+答案55.pdf\", \"regions\": [{\"bbox\": [30.22, 251.27, 545.27, 382.32], \"page\": 1}], \"section\": \"generic\", \"page_end\": 1, \"page_start\": 1, \"section_label\": \"\", \"answer_regions\": []}, \"version\": 1, \"grade_level\": \"SENIOR\", \"number_label\": \"2\", \"subject_code\": \"math\", \"question_type\": \"single_choice\", \"content_sha256\": \"ac058bb77ea86c80405a0843569077294a344fe2067edefb9037cb29776946a1\"}","body_html":"<div>如图，∠BAC= 90°，AD ⊥BC于D，则下列结论中，正确的个数为( ).①AB⊥ AC：②AD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AC的长度是点C到AB的距离;⑥线段CD的长度是点D到AC的距离．<img class=\"question-figure\" src=\"http://tikupdfpng.mtwlkj.net:5129/qbank/math/2026/09/2b06312b-7e3f-494e-ae3e-21d10207fcf7/4b18f7e3-1064-4e88-b1bb-2c27ab98cca2/8ebdcf9b725e.png\" style=\"width:128.6px!important;max-width:100%;height:auto\" alt=\"\" title=\"点击查看原图\"><br>A. 3个<br>B. 4个<br>C. 5个<br>D. 6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":null,"error_message":"处理异常: LLM call failed after retries: HTTPConnectionPool(host='127.0.0.1', port=8092): Read timed out. 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