{"ok":true,"question":{"id":21530,"question_uuid":"854e55e4-0fa2-4cc6-9f13-2c67de80e8ac","job_id":3,"source_file":"人教版/七下/2026江苏七年级期末数学试卷+答案440.pdf","source_page_start":1,"source_page_end":1,"source_bbox":"[303.07, 365.15, 442.64, 384.26]","subject_code":"math","grade_level":"JUNIOR","tree_code":"KT_JUNIOR_MATH_STANDARD","question_type":"fill_blank","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"−3 8的相反数是 ______\", \"type\": \"text\"}, {\"type\": \"answer\", \"blocks\": [{\"text\": \"3\", \"type\": \"text\"}]}, {\"type\": \"solution\", \"blocks\": [{\"text\": \"−3∛8 = −\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"3\\\\times 2 =\"}, {\"text\": \"−6，其相反数为 6。\", \"type\": \"text\"}]}], \"source\": {\"bbox\": [303.07, 365.15, 442.64, 384.26], \"file\": \"人教版/七下/2026江苏七年级期末数学试卷+答案440.pdf\", \"regions\": [{\"bbox\": [303.07, 365.15, 442.64, 384.26], \"page\": 1}], \"section\": \"memory\", \"page_end\": 1, \"page_start\": 1, \"section_label\": \"巩固记忆学习       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