var json2 =({
  "?xml": {
    "@version": "1.0",
    "@encoding": "UTF-8"
  },
  "text": {
    "heading1": {
      "@fieldnumber": "0",
      "#text": "目的"
    },
    "objective": {
      "@fieldnumber": "1",
      "#text": "学习如何求解方程。"
    },
    "heading2": {
      "@fieldnumber": "2",
      "#text": "总结"
    },
    "summary": {
      "@fieldnumber": "3",
      "#cdata-section": "\n<br>&#187; 含有未知数的等式叫方程。 \n<br>&#187; 要解方程，必须求出方程中字母的正确值。 \n<br>&#187; 要做到这一点，需要将方程变形，使方程左边只含有这个字母。\n<br>&#187; 记住，当你移动一个数字到另一边时，必须改变符号。"
    }
  }
});
