配对取样;
Methods 104 DPN patients were randomly paired by the stratified sampling method and divided into acupuncture medicament group and control group, 52 cases for each.
方法将DPN患者104例,随机分为针药组和对照组各52例。
简答网 · 高考英语
简答网 · 双语新闻
简答网 · 初中英语作文