A.92.7% B.87.5% C.0.49‰ D.0.89‰ E.0.40‰
A.隊(duì)列研究 B.病例對(duì)照研究 C.生態(tài)學(xué)研究 D.社區(qū)實(shí)驗(yàn) E.現(xiàn)場(chǎng)實(shí)驗(yàn)
A.1.0% B.61.4% C.30.2% D.1.3% E.0.4%