ntent\":\"

放大电路

\"},{\"content\":\"

按键

\"},{\"content\":\"

蓝牙

\"}]","orderNum":0,"preProblemId":"","preSubjectId":null,"question":"MP3小音箱能将声音放大是因为有（）\n\n","specialGroupName":"","specialId":null,"specialImageUrl":"","specialTitle":"","status":null,"tagViews":[{"id":504,"name":"全国青少年信息素养大赛","subjectAmt":0}],"type":1,"updatedTime":"2025-03-21 11:55:03","userAcAmt":null,"userCommitAmt":null,"optionsArray":[{"content":"

内存卡

","id":"A"},{"content":"

放大电路

","id":"B"},{"content":"

按键

","id":"C"},{"content":"

蓝牙

","id":"D"}]}}]] 19:{"metadata":[["$","title","0",{"children":"MP3小音箱能将声音放大是因为有（）\n\n - 基础题库 - 信竞星球"}],["$","meta","1",{"name":"description","content":"信竞星球基础题：MP3小音箱能将声音放大是因为有（）\n\n。单选题，难度：简单。"}],["$","meta","2",{"name":"keywords","content":"全国青少年信息素养大赛,信息学竞赛,编程基础题,单选题"}],["$","link","3",{"rel":"canonical","href":"https://xjxq.club/basic-problems/11852"}],["$","meta","4",{"property":"og:title","content":"MP3小音箱能将声音放大是因为有（）\n\n - 基础题库"}],["$","meta","5",{"property":"og:description","content":"信竞星球基础题：MP3小音箱能将声音放大是因为有（）\n\n。单选题，难度：简单。"}],["$","meta","6",{"property":"og:url","content":"https://xjxq.club/basic-problems/11852"}],["$","meta","7",{"property":"og:site_name","content":"信竞星球"}],["$","meta","8",{"property":"og:locale","content":"zh_CN"}],["$","meta","9",{"property":"og:image","content":"https://xjxq.club/og-default.png"}],["$","meta","10",{"property":"og:image:width","content":"1200"}],["$","meta","11",{"property":"og:image:height","content":"630"}],["$","meta","12",{"property":"og:image:alt","content":"MP3小音箱能将声音放大是因为有（）\n\n - 基础题库"}],["$","meta","13",{"property":"og:type","c

题库

题库

MP3小音箱能将声音放大是因为有（）

请选择答案