{"ok":true,"question":{"id":21525,"question_uuid":"11f95e61-d988-472a-9453-560a324672b2","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":"[30.0, 522.37, 169.64, 541.46]","subject_code":"math","grade_level":"JUNIOR","tree_code":"KT_JUNIOR_MATH_STANDARD","question_type":"fill_blank","canonical_json":"{\"year\": null, \"blocks\": [{\"text\": \"− 的相反数是 ______\", \"type\": \"text\"}, {\"type\": \"answer\", \"blocks\": [{\"text\": \"1\", \"type\": \"text\"}]}, {\"type\": \"solution\", \"blocks\": [{\"text\": \"−^3√8 = −2，−2 的相反数是 2？不对，−^3√8 = −2，其相反数是 2。但等等，−^3√8 本身是负数，相反数应为正数 2。然而，若理解为 (−^3√8) 的相反数，则即 −(−^3√8) = ^3√8 = 2。所以答案是 2。\", \"type\": \"text\"}]}], \"source\": {\"bbox\": [30.0, 522.37, 169.64, 541.46], \"file\": \"人教版/七下/2026江苏七年级期末数学试卷+答案440.pdf\", \"regions\": [{\"bbox\": [30.0, 522.37, 169.64, 541.46], \"page\": 1}], \"section\": \"memory\", \"page_end\": 1, \"page_start\": 1, \"section_label\": \"巩固记忆学习        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