{
  "id": "S047",
  "type": "单选题",
  "type_code": "single",
  "stem": "在概率抽样中，样本量相同时，设计效应小于1的抽样方法是（ ）。",
  "stem_text": "在概率抽样中，样本量相同时，设计效应小于1的抽样方法是（ ）。",
  "options": [
    {
      "key": "A",
      "text": "简单随机抽样"
    },
    {
      "key": "B",
      "text": "分层抽样"
    },
    {
      "key": "C",
      "text": "整群抽样"
    },
    {
      "key": "D",
      "text": "系统抽样"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "简单随机抽样"
    },
    {
      "key": "B",
      "text": "分层抽样"
    },
    {
      "key": "C",
      "text": "整群抽样"
    },
    {
      "key": "D",
      "text": "系统抽样"
    }
  ],
  "answer_keys": [
    "B"
  ],
  "answer_display": "B",
  "answer_texts": [
    "分层抽样"
  ],
  "sources": [
    {
      "edition": "第12届",
      "edition_num": 12,
      "no": 47,
      "uid": "12-047",
      "file": "第12届本科模拟题（10.19）.xlsx"
    }
  ],
  "source_display": "第12届 第47题",
  "source_count": 1,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/S047.html"
}