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同学的手机响了，老师却听不见？2分钟检查自己的听力年龄
我们只能听到20-20000hshengyingz的声音，可是现在听书软件流行，许多人的耳机每天都戴着，实际上耳朵的年龄已经提前到了50岁，这期的科普主题：保护好自己的耳朵！
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