{
"title": "示例题库",
"questions": [
{"type":"single","question":"2+2=?","options":["3","4","5"],"answer":"4"},
{"type":"judge","question":"地球是圆的。","answer":true},
{"type":"single","question":"HTML 是什么?","options":["编程语言","标记语言"],"answer":"标记语言"}
]
}