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在率的抽样研究中，样本大小主要取决于两个因素，即

高老师2年前 (2024-04-21)流行病学(05757)8

在率的抽样研究中，样本大小主要取决于两个因素，即

A.预期患病率和容许误差

B.把握度和容许误差

C.相对危险度和把握度

D.预期患病率和把握度

正确答案是A

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