{
  "id": "S211",
  "type": "单选题",
  "type_code": "single",
  "stem": "设计效应小于1时表示（）。",
  "stem_text": "设计效应小于1时表示（）。",
  "options": [
    {
      "key": "A",
      "text": "设计方案的效率低于简单随机抽样"
    },
    {
      "key": "B",
      "text": "设计方案的效率高于简单随机抽样"
    },
    {
      "key": "C",
      "text": "简单随机抽样的效率与设计方案的效率一样"
    },
    {
      "key": "D",
      "text": "设计方案的效率高于分层抽样"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "设计方案的效率低于简单随机抽样"
    },
    {
      "key": "B",
      "text": "设计方案的效率高于简单随机抽样"
    },
    {
      "key": "C",
      "text": "简单随机抽样的效率与设计方案的效率一样"
    },
    {
      "key": "D",
      "text": "设计方案的效率高于分层抽样"
    }
  ],
  "answer_keys": [
    "B"
  ],
  "answer_display": "B",
  "answer_texts": [
    "设计方案的效率高于简单随机抽样"
  ],
  "sources": [
    {
      "edition": "第15届",
      "edition_num": 15,
      "no": 41,
      "uid": "15-041",
      "file": "第15届市调大赛本科组模拟题1.docx"
    }
  ],
  "source_display": "第15届 第41题",
  "source_count": 1,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/S211.html"
}