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疾病控制题库/单项选择题

在研究抗心律不齐药物的药效时,选择研究对象正确的是

  • A最好选择近期心律不齐频繁发作的病人
  • B最好不要选择近期心律不齐频繁发作的病人
  • C可用孕妇作为研究对象
  • D样本量越大,结果越能说明问题
  • E病人的年龄和性别对研究结果影响不大
参考答案: A
解题思路: >>>立即刷题
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