var json1=({
  "LO": {
    "VOText": {
      "VO": [
        {
          "@id": "s1_sound1",
          "@mp3ref": "p04lfp21a.mp3",
          "#text": "伽马射线的波长比X射线还要短。 "
        },
        {
          "@id": "s1_sound2",
          "@mp3ref": "p04lfp21b.mp3",
          "#text": "它可以毫不费力地穿透细胞组织。而且它比X射线的电离能力强。所以它对所有生物都是危险的。 "
        },
        {
          "@id": "s1_sound3",
          "@mp3ref": "p04lfp21c.mp3",
          "#text": "遭到伽马射线的辐射会致癌，或者被杀死全部细胞。"
        },
        {
          "@id": "s1_sound4",
          "@mp3ref": "p04lfp21d.mp3",
          "#text": "奇妙的是，在合理的剂量下，伽马射线也可以通过杀死癌细胞来治愈癌症。 "
        },
        {
          "@id": "s1_sound5",
          "@mp3ref": "p04lfp21e.mp3",
          "#text": "放射性疗法就是利用辐射进行治疗。"
        },
        {
          "@id": "s1_sound6",
          "@mp3ref": "p04lfp21f.mp3",
          "#text": "放射同位素会释放出伽马射线，因此在医院被用作辐射示踪物。"
        },
        {
          "@id": "s1_sound7",
          "@mp3ref": "p04lfp21g.mp3",
          "#text": "辐射示踪物被注射到血液中，或被吸入身体里，然后一种特殊的照相机就可以跟踪它在身体中的进展。"
        },
        {
          "@id": "s1_sound8",
          "@mp3ref": "p04lfp21h.mp3",
          "#text": "因为长时间暴露于伽马射线中会损伤细胞，导致癌变，所以才会选择半衰期短的辐射示踪物。这意味着它们的放射性会很快降低。 "
        },
        {
          "@id": "s1_sound9",
          "@mp3ref": "p04lfp21i.mp3",
          "#text": "伽马射线被用于消毒医疗器械和敷料。它能杀死任何可能存在的细菌。 "
        },
        {
          "@id": "s1_sound10",
          "@mp3ref": "p04lfp21j.mp3",
          "#text": "伽马射线也可以用来照射食物，以延长食物的保质期。这种辐射可以消灭食物上的细菌和霉菌，防止腐烂。"
        }
      ]
    },
    "Labels": {
      "Label": [
        {
          "@id": "slide1_s1_lab1",
          "#text": "伽马射线 "
        },
        {
          "@id": "slide1_s1_lab2",
          "#text": "波长"
        },
        {
          "@id": "slide1_s1_lab3",
          "#text": "微波"
        },
        {
          "@id": "slide1_s1_lab4",
          "#text": "红外线"
        },
        {
          "@id": "slide1_s1_lab5",
          "#text": "紫外线"
        },
        {
          "@id": "slide1_s1_lab6",
          "#text": "X射线"
        },
        {
          "@id": "slide1_s1_lab7",
          "#text": "伽马射线"
        },
        {
          "@id": "slide1_s1_lab8",
          "#text": "很短"
        },
        {
          "@id": "slide1_s1_lab9",
          "#text": "1m"
        },
        {
          "@id": "slide1_s1_lab10",
          "#text": "1mm"
        },
        {
          "@id": "slide1_s1_lab11",
          "#text": "0.001mm"
        },
        {
          "@id": "slide1_s1_lab12",
          "#text": "波长"
        },
        {
          "@id": "slide1_s1_lab13",
          "#text": "0.000001mm"
        },
        {
          "@id": "slide1_s1_lab14",
          "#text": "0.000000001mm"
        },
        {
          "@id": "slide1_s1_lab15",
          "#text": "癌细胞 "
        },
        {
          "@id": "slide1_s1_lab16",
          "#text": "癌细胞 "
        },
        {
          "@id": "slide1_s1_lab17",
          "#text": "伽马辐射 "
        },
        {
          "@id": "slide1_s1_lab18",
          "#text": "伽马相机 "
        },
        {
          "@id": "slide1_s1_lab19",
          "#text": "伽马相机能探测出来自辐射示踪物的辐射。"
        },
        {
          "@id": "slide1_s1_lab20",
          "#text": "半衰期短的辐射示踪物。 "
        },
        {
          "@id": "slide1_s1_lab21",
          "#text": "放射性小 "
        },
        {
          "@id": "slide1_s1_lab22",
          "#text": "至"
        }
      ]
    }
  }
});
