{
  "id": "S262",
  "type": "单选题",
  "type_code": "single",
  "stem": "当设计方案的效率低于简单随机抽样时设计效应的取值区间为（）",
  "stem_text": "当设计方案的效率低于简单随机抽样时设计效应的取值区间为（）",
  "options": [
    {
      "key": "A",
      "text": "小于1"
    },
    {
      "key": "B",
      "text": "等于1"
    },
    {
      "key": "C",
      "text": "大于1"
    },
    {
      "key": "D",
      "text": "在1和-1之间"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "小于1"
    },
    {
      "key": "B",
      "text": "等于1"
    },
    {
      "key": "C",
      "text": "大于1"
    },
    {
      "key": "D",
      "text": "在1和-1之间"
    }
  ],
  "answer_keys": [
    "C"
  ],
  "answer_display": "C",
  "answer_texts": [
    "大于1"
  ],
  "sources": [
    {
      "edition": "第16届",
      "edition_num": 16,
      "no": 39,
      "uid": "16-039",
      "file": "第16届市调大赛本科组模拟题一(1).docx"
    }
  ],
  "source_display": "第16届 第39题",
  "source_count": 1,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/S262.html"
}