{"ok":true,"question":{"id":21559,"question_uuid":"5e6aa39b-f6ed-429d-8eda-1015d84dd7c5","job_id":3,"source_file":"人教版/七下/2026江苏七年级期末数学试卷+答案445.pdf","source_page_start":1,"source_page_end":1,"source_bbox":"[30.0, 521.77, 170.24, 537.63]","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\": \"−2\", \"type\": \"text\"}]}, {\"type\": \"solution\", \"blocks\": [{\"text\": \"−^3√8 的相反数即 −(−^3√8) = ^3√8。因为\", \"type\": \"text\"}, {\"type\": \"math_inline\", \"latex\": \"2^3\"}, {\"text\": \"= 8，所以 ^3√8 = 2，故答案为 2。\", \"type\": \"text\"}]}], \"source\": {\"bbox\": [30.0, 521.77, 170.24, 537.63], \"file\": \"人教版/七下/2026江苏七年级期末数学试卷+答案445.pdf\", \"regions\": [{\"bbox\": [30.0, 521.77, 170.24, 537.63], \"page\": 1}], \"section\": \"memory\", \"page_end\": 1, \"page_start\": 1, 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