{
   {
    "pid": 1,
    "question":"这是什么类型的水工挡土墙? ",
     "image":"image/2.jpg",
   "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"重力式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
  {
   "pid": 2,
   "question":"水工挡土墙的顶标高是多少？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": "m",
   "percision": 2,
   "answer":"302.70",
   "question_type":"free_form",
   "answer_type":"float",
  },
  {
   "pid": 3,
   "question":"水工挡土墙的底标高是多少？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": "m",
   "percision":  2,
   "answer":"296.00",
   "question_type":"free_form",
   "answer_type":"float",
   },
  {
   "pid": 4,
   "question":"水工挡土墙的墙顶宽度是多少？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"600",
   "question_type":"free_form",
   "answer_type":"integer",
  },
 {
   "pid": 5,
   "question":"水工挡土墙的基底宽度是多少？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"2000",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
    "pid":6,
    "question":"水工挡土墙塑料排水管直径为多少? ",
    "image":"image/2.jpg",
    "choices：null,
    "unit":"mm",
    "precision":null,
    "answer":50,
    "question_type":"free_form",
    "answer_type":"integer",
 },
 {
    "pid":7,
    "question":"水工挡土墙M10水泥砂浆层的厚度是多少? ",
    "image":"image/2.jpg",
    "choices：null,
    "unit":"cm",
    "precision":null,
    "answer":3,
    "question_type":"free_form",
    "answer_type":"integer",
 },
 {
    "pid":8,
    "question":"水工挡土墙浆砌石的强度等级是多少? ",
    "image":"image/2.jpg",
    "choices：null,
    "unit":"MPa",
    "precision":1,
    "answer":7.5,
    "question_type":"free_form",
    "answer_type":"float",
 },
 {
    "pid":9,
    "question":"水工挡土墙砂浆勾缝的强度等级是多少? ",
    "image":"image/2.jpg",
    "choices：null,
    "unit":"MPa",
    "precision":null,
    "answer":10,
    "question_type":"free_form",
    "answer_type":"integer",
 },
 {
    "pid":10,
    "question":"水工挡土墙设计开挖线比例是多少? ",
    "image":"image/2.jpg",
    "choices：null,
    "unit":null,
    "precision":null,
    "answer":"1:1",
    "question_type":"free_form",
    "answer_type":"text",
 },
 {
   "pid": 11,
   "question":"水工挡土墙是用什么材料回填的？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": null,
   "percision": null,
   "answer":"砂砾石",
   "question_type":"free_form",
   "answer_type":"text",
  },
{
   "pid": 12,
   "question":"水工挡土墙是用什么材料填筑的？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": null,
   "percision": null,
   "answer":"砂砾石",
   "question_type":"free_form",
   "answer_type":"text",
  },
{
   "pid": 13,
   "question":"水工挡土墙的反滤层如何设置？",
   "image":"image/2.jpg",
   "choices": null,
   "unit":  null,
   "percision": null,
   "answer":"土工织物包管头",
   "question_type":"free_form",
   "answer_type":"text",
  },
{
   "pid": 14,
   "question":"水工挡土墙的墙体用什么材料填充？",
   "image":"image/2.jpg",
   "choices": null,
   "unit": null,
   "percision": null,
   "answer":"M10水泥砂浆",
   "question_type":"free_form",
   "answer_type":"text",
  },
{
    "pid": 15,
    "question":"这是什么类型的水工挡土墙? ",
    "image":"image/4.jpg",
    "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"重力式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
 {
   "pid": 16,
   "question":"水工挡土墙的顶标高是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": "m",
   "percision": 2,
   "answer":"145.17",
   "question_type":"free_form",
   "answer_type":"float",
  },
{
   "pid": 17,
   "question":"水工挡土墙的顶标高是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": "m",
   "percision": 2,
   "answer":"145.17",
   "question_type":"free_form",
   "answer_type":"float",
  },
{
   "pid": 18,
   "question":"水工挡土墙的底标高是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": "m",
   "percision":  2,
   "answer":"141.68",
   "question_type":"free_form",
   "answer_type":"float",
  },
 {
   "pid": 19,
   "question":"水工挡土墙的墙顶宽是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"300",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
   "pid": 20,
   "question":"水工挡土墙的反滤层如何设置？",
   "image":"image/4.jpg",
   "choices": null,
   "unit":  null,
   "percision": null,
   "answer":"土工织物包排水管口，级配碎石厚300mm，宽500mm通长布置",
   "question_type":"free_form",
   "answer_type":"text",
  },
{
   "pid": 21,
   "question":"水工挡土墙的基础砼强度是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit":  null,
   "percision": null,
   "answer":"C20",
   "question_type":"free_form",
   "answer_type":"text",
  },
{
   "pid": 22,
   "question":"水工挡土墙的基底宽度是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"2216",
   "question_type":"free_form",
   "answer_type":"integer",
  },
 {
    "pid":23,
    "question":"水工挡土墙土工布单位平面的质量是多少? ",
    "image":"image/4.jpg",
    "choices：null,
    "unit":"g*g/m",
    "precision":null,
    "answer":"300",
    "question_type":"free_form",
    "answer_type":"integer",
   },
  {
    "pid":24,
    "question":"水工挡土墙级配碎石的厚度和宽度分别是多少? ",
    "image":"image/4.jpg",
    "choices：null,
    "unit":"mm",
    "precision":null,
    "answer":"300，500",
    "question_type":"free_form",
    "answer_type":"text",
 },
{
   "pid": 25,
   "question":"水工挡土墙的基础高度是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"2216",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
   "pid": 26,
   "question":"水工挡土墙的墙身高度是多少？",
   "image":"image/4.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"3490",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
    "pid": 27,
    "question":"这是什么类型的水工挡土墙? ",
    "image":"image/5.jpg",
    "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"悬臂式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
{
    "pid":28,
    "question":"水工挡土墙第一个排水管安装位置是多少? ",
    "image":"image/5.jpg",
    "choices：null,
    "unit":"mm",
    "precision":null,
    "answer":"300~500",
    "question_type":"free_form",
    "answer_type":"text",
 },
{
    "pid": 29,
    "question":"这是什么类型的水工挡土墙? ",
    "image":"image/6.jpg",
    "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"扶壁式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
{
    "pid": 30,
    "question":"这是什么类型的水工挡土墙? ",
    "image":"image/7.jpg",
    "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"衡重式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
{  
    "pid":31,
    "question":"水工挡土墙填土高度为多少? ",
    "image":"image/7.jpg",
    "choices：null,
    "unit":"mm",
    "precision":null,
    "answer":"5000",
    "question_type":"free_form",
    "answer_type":"integer",
 },
{
    "pid": 32,
    "question":"这是什么类型的水工挡土墙? ",
    "image":"image/8.jpg",
    "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"衡重式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
{
   "pid": 33,
   "question":"水工挡土墙的顶标高是多少？",
   "image":"image/8.jpg",
   "choices": null,
   "unit": "m",
   "percision": 2,
   "answer":"1204.45",
   "question_type":"free_form",
   "answer_type":"float",
  },
{
   "pid": 34,
   "question":"水工挡土墙的底标高是多少？",
   "image":"image/8.jpg",
   "choices": null,
   "unit": "m",
   "percision":  2,
   "answer":"1199.28",
   "question_type":"free_form",
   "answer_type":"float",
  },
 {
   "pid": 35,
   "question":"水工挡土墙的墙顶宽度是多少？",
   "image":"image/8.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"50",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
   "pid": 36,
   "question":"水工挡土墙的基础高度是多少？",
   "image":"image/8.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"50",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
   "pid": 37,
   "question":"水工挡土墙的墙身高度是多少？",
   "image":"image/8.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"516",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
   "pid": 38,
   "question":"水工挡土墙的基底宽度是多少？",
   "image":"image/8.jpg",
   "choices": null,
   "unit": “mm",
   "percision": null,
   "answer":"126",
   "question_type":"free_form",
   "answer_type":"integer",
  },
{
    "pid": 39,
    "question":"这是什么类型的水工挡土墙? ",
    "image":"image/9.jpg",
    "choices：["重力式","衡重式","悬臂式","板桩式","锚杆式","加筋式","扶壁式"],
    "unit":null,
    "precision":null,
    "answer":"重力式",
    "question_type":"mlti_choice",
    "answer_type":"text",
  },
 {
    "pid":40,
    "question":"水工挡土墙桩的埋深是多少? ",
    "image":"image/9.jpg",
    "choices：null,
    "unit":"m",
    "precision":2,
    "answer":"6.00",
    "question_type":"free_form",
    "answer_type":"float",
 },
 {
    "pid":41,
    "question":"水工挡土墙搭板的长是多少? ",
    "image":"image/9.jpg",
    "choices：null,
    "unit":"m",
    "precision":2,
    "answer":"8.50",
    "question_type":"free_form",
    "answer_type":"float",
 },
 {
    "pid":42,
    "question":"水工挡土墙桩的总长是多少? ",
    "image":"image/9.jpg",
    "choices：null,
    "unit":"m",
    "precision":2,
    "answer":"15.00",
    "question_type":"free_form",
    "answer_type":"float",
 },
   }