var json2 =({
  "?xml": {
    "@version": "1.0",
    "@encoding": "UTF-8"
  },
  "text": {
    "heading1": {
      "@fieldnumber": "0",
      "#text": "目的"
    },
    "objective": {
      "@fieldnumber": "1",
      "#text": "学习如何辨认不同种类的角--锐角，钝角和优角。"
    },
    "heading2": {
      "@fieldnumber": "2",
      "#text": "总结"
    },
    "summary": {
      "@fieldnumber": "3",
      "#cdata-section": "\n<br>&#187; 小于90度的角叫做锐角。\n<br>&#187; 在90度和180度之间的角叫做钝角。\n<br>&#187; 直线角是180度角。\n<br>&#187; 在180度和360度之间的角是优角。"
    }
  }
});
