var json1=({
  "LO": {
    "VOText": {
      "VO": [
        {
          "@id": "s1_sound1",
          "@mp3ref": "p04lfp08a.mp3",
          "#text": "微波是波长很短的无线电波，它能很容易地穿过地球的大气层。"
        },
        {
          "@id": "s1_sound2",
          "@mp3ref": "p04lfp08b.mp3",
          "#text": "它们被应用于雷达，发送和接收卫星信号，也可以在移动电话网络内部传送信号。"
        },
        {
          "@id": "s1_sound3",
          "@mp3ref": "p04lfp08c.mp3",
          "#text": "它们还被用于在全国范围内传送电视和电话信号。"
        },
        {
          "@id": "s1_sound4",
          "@mp3ref": "p04lfp08d.mp3",
          "#text": "波是直线传播的，所以利用凹状碟形发射机可以很容易地把它们聚焦在卫星上。"
        },
        {
          "@id": "s1_sound5",
          "@mp3ref": "p04lfp08e.mp3",
          "#text": "然后卫星再按照新的路线把微波传送回地球，由卫星天线接收。"
        },
        {
          "@id": "s1_sound6",
          "@mp3ref": "p04lfp08f.mp3",
          "#text": "碟形接收天线把很大一片区域的波收集起来，把它们聚焦到转换器上，再由转换器把电磁波转换成电子信号。"
        },
        {
          "@id": "s2_sound1",
          "@mp3ref": "p04lfp09a.mp3",
          "#text": "微波炉发出的波是有频率的，它和水分子振动的自然频率非常相近。所以微波很容易被食物中的水吸收。"
        },
        {
          "@id": "s2_sound2",
          "@mp3ref": "p04lfp09b.mp3",
          "#text": "微波可以深透食物，对食物进行全方位的加热。它比传统烤箱更快更干净。"
        },
        {
          "@id": "s2_sound3",
          "@mp3ref": "p04lfp09c.mp3",
          "#text": "传统烤箱从外部加热食物。所以，当外层已经熟了时，内层还仍然是生的。"
        },
        {
          "@id": "s2_sound4",
          "@mp3ref": "p04lfp09d.mp3",
          "#text": "微波会被活细胞里的水吸收。这会造成灼伤，损害细胞。过量的微波甚至可能杀死细胞。"
        },
        {
          "@id": "s2_sound5",
          "@mp3ref": "p04lfp09e.mp3",
          "#text": "为了防止微波意外泄露，微波炉只有在关上门后才可以被操作。"
        }
      ]
    },
    "Labels": {
      "Label": [
        {
          "@id": "slide1_s1_lab1",
          "#text": "微波"
        },
        {
          "@id": "slide1_s1_lab2",
          "#text": "波長"
        },
        {
          "@id": "slide1_s1_lab3",
          "#text": "长波"
        },
        {
          "@id": "slide1_s1_lab4",
          "#text": "中波"
        },
        {
          "@id": "slide1_s1_lab5",
          "#text": "短波"
        },
        {
          "@id": "slide1_s1_lab6",
          "#text": "特高频"
        },
        {
          "@id": "slide1_s1_lab7",
          "#text": "超高频"
        },
        {
          "@id": "slide1_s1_lab8",
          "#text": "微波"
        },
        {
          "@id": "slide1_s1_lab9",
          "#text": "红外线"
        },
        {
          "@id": "slide1_s1_lab10",
          "#text": "紫外线"
        },
        {
          "@id": "slide1_s1_lab11",
          "#text": "X光"
        },
        {
          "@id": "slide1_s1_lab12",
          "#text": "伽马射线"
        },
        {
          "@id": "slide1_s1_lab13",
          "#text": "长"
        },
        {
          "@id": "slide1_s1_lab14",
          "#text": "1000米"
        },
        {
          "@id": "slide1_s1_lab15",
          "#text": "1米"
        },
        {
          "@id": "slide1_s1_lab16",
          "#text": "1毫米"
        },
        {
          "@id": "slide1_s1_lab17",
          "#text": "0.001毫米"
        },
        {
          "@id": "slide1_s1_lab18",
          "#text": "波长"
        },
        {
          "@id": "slide1_s1_lab19",
          "#text": "0.000001毫米"
        },
        {
          "@id": "slide1_s1_lab20",
          "#text": "0.000000001毫米"
        },
        {
          "@id": "slide1_s1_lab21",
          "#text": "很短"
        },
        {
          "@id": "slide1_s1_lab22",
          "#text": "光"
        },
        {
          "@id": "slide1_s1_lab23",
          "#text": "紫外线"
        },
        {
          "@id": "slide1_s1_lab24",
          "#text": "波长"
        },
        {
          "@id": "slide1_s1_lab25",
          "#text": "转换器"
        },
        {
          "@id": "slide1_s1_lab26",
          "#text": "很短"
        },
        {
          "@id": "slide1_s1_lab27",
          "#text": "到"
        },
        {
          "@id": "slide1_oktext",
          "#text": "OK"
        },
        {
          "@id": "slide1_didtitle",
          "#text": "你知道吗？"
        },
        {
          "@id": "slide1_didtext",
          "#text": "伦敦的电信塔高达189米。它用于微波通讯，不需要地下电话电缆就可以在全国范围内传输信号。"
        },
        {
          "@id": "slide1_instruct",
          "#text": "点击我可以找到更多信息！"
        },
        {
          "@id": "slide2_s2_lab1",
          "#text": "微波在这儿产生。"
        },
        {
          "@id": "slide2_s2_lab2",
          "#text": "金属物体会反射微波。"
        },
        {
          "@id": "slide2_s2_lab3",
          "#text": "微波很容易在塑料、瓷器和玻璃中传输（它们传导波）。"
        },
        {
          "@id": "slide2_s2_lab4",
          "#text": "水分子通过吸收微波来加热食物。"
        }
      ]
    }
  }
});
