{
  "name": "二年级上册数学知识点汇总",
  "short_name": "二年级数学",
  "description": "根据人教版二年级上册数学教材编写，涵盖长度单位、100以内的加法和减法、角的初步认识、表内乘法、观察物体、认识时间、数学广角七大章节。",
  "start_url": "./",
  "display": "standalone",
  "background_color": "#FAFAFA",
  "theme_color": "#FBBF24",
  "orientation": "portrait-primary",
  "icons": [
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      "sizes": "192x192",
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  "categories": [
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    "books"
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  "lang": "zh-CN",
  "dir": "ltr"
}