能最好地显示某种疾病发病率情况的研究是A.病例-对照研究B.随机对照临床试验C.横断面研究D.队列研究E.交叉试验

作者: rantiku 人气: - 评论: 0
问题 能最好地显示某种疾病发病率情况的研究是
选项 A.病例-对照研究 B.随机对照临床试验 C.横断面研究 D.队列研究 E.交叉试验
答案 D
解析

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