var json2 =({
  "?xml": {
    "@version": "1.0",
    "@encoding": "UTF-8"
  },
  "text": {
    "heading1": {
      "@fieldnumber": "0",
      "#text": "目的"
    },
    "objective": {
      "@fieldnumber": "1",
      "#text": "学习如何使用指示剂在PH值的范围内来区分溶液的酸性、中性和碱性。"
    },
    "heading2": {
      "@fieldnumber": "2",
      "#text": "总结"
    },
    "summary": {
      "@fieldnumber": "3",
      "#cdata-section": "&#187;  溶液可能是酸性、碱性或中性的。\n<br>&#187;  指示剂是在酸和碱中产生不同颜色的化学制品。\n<br>&#187;  石蕊是一种指示剂，它在酸中是红色的，在碱中是蓝色的。\n"
    }
  }
});
