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小学生卫生预防知识竞赛试题
2026-06-15
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Key Point:小学生卫生健康知识竞赛题一、单选题1、正确的看书姿势对你保护视力十分重要，书本与眼睛应保持多大距离较合适（B）A、25—30cmB、30—35cmC、35—40cmD、40—..
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2026-06-15
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