{"ok":true,"question":{"id":20966,"question_uuid":"d49461fe-13f1-48eb-bada-0d93eb3796ba","job_id":4,"source_file":"A中考/2026江苏中考期末数学试卷+答案815.pdf","source_page_start":5,"source_page_end":5,"source_bbox":"[45.0, 158.07, 520.6, 364.03]","subject_code":"math","grade_level":"SENIOR","tree_code":"KT_SENIOR_MATH_STANDARD","question_type":"fill_blank","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"如图，△ABC内接于⊙O，D为弦BC所对优弧上一点，连接CD,AD,AO，则有OA⊥BC，若∠ADC=25°，则∠CAB的度数是( )\", \"type\": \"text\"}, {\"kind\": \"embedded_image\", \"type\": \"figure\", \"width\": 708, \"height\": 608, \"sha256\": \"ece79001354c97042df76bf4ecc70c516ecdbea767a37fbd29e77eb26a676d04\", \"caption\": \"\", \"asset_key\": \"math/2026/09/16de2e24-a616-456b-83c5-3364ab6bd928/d49461fe-13f1-48eb-bada-0d93eb3796ba/ece79001354c.png\", \"public_url\": \"http://tikupdfpng.mtwlkj.net:5129/qbank/math/2026/09/16de2e24-a616-456b-83c5-3364ab6bd928/d49461fe-13f1-48eb-bada-0d93eb3796ba/ece79001354c.png\", \"source_bbox\": [45.0, 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