var json2 =({
  "?xml": {
    "@version": "1.0",
    "@encoding": "UTF-8"
  },
  "text": {
    "heading1": {
      "@fieldnumber": "0",
      "#text": "目的"
    },
    "objective": {
      "@fieldnumber": "1",
      "#text": "学习了解电流是电荷围绕电路的流动，电阻越大，电流越小。"
    },
    "heading2": {
      "@fieldnumber": "2",
      "#text": "总结"
    },
    "summary": {
      "@fieldnumber": "3",
      "#cdata-section": "\n<br>&#187;  导体是善于导电的物质。比如金属。\n<br>&#187;  绝缘体是不善于导电的物质。比如塑料。\n<br>&#187;  电流是电荷的定向移动形成的。\n<br>&#187;  电流越大，灯泡越明亮。\n<br>&#187;  电阻是导体对电流的阻碍作用。\n<br>&#187;  电路电阻越大，电流越小。\n"
    }
  }
});
