A.n≥50B.p不接近0C.p接近0.50D.np或n(1-p)大于5E.np与n(1-p)均大于5
A.发热3~4天出疹,出疹时热度增高B.发热3~4天出疹,出疹时热退C.发热2~3天出疹D.发热或无热,1~2天出疹E.发热数小时~1天出疹