var json2 =({
  "?xml": {
    "@version": "1.0",
    "@encoding": "UTF-8"
  },
  "text": {
    "heading1": {
      "@fieldnumber": "0",
      "#text": "目的"
    },
    "objective": {
      "@fieldnumber": "1",
      "#text": "学习了解元素的物理属性变化多样，并理解怎样运用这些元素的属性来区分归类金属。"
    },
    "heading2": {
      "@fieldnumber": "2",
      "#text": "总结"
    },
    "summary": {
      "@fieldnumber": "3",
      "#cdata-section": "金属\n<br>&#187;  能在不断裂的情况下被伸展和弯曲。\n<br>&#187;  有金属光泽和良好的导热导电性。\n<br>&#187;  强度大，高密度，高熔沸点。\n<br>&#187;  除水银之外，室温下呈固态"
    }
  }
});
