“原产国”栏应填:A.502 B.304 C.116 D.344 发布时间:2018-01-10 18:34 │ 来源:www.tikuol.com 题型:单项选择题 问题: “原产国”栏应填:A.502B.304C.116D.344
题型:单项选择题 You should ________ your problems ________ your best friend, [ ]A. talk with; about B. talk about; with C. talk to; about D. talk with; with 查看答案
题型:单项选择题 为了解某地区50岁中年人患牙周炎的情况,要求抽样误差为10%,从该地区中心医院病历中随机抽取1000份病历进行调查,得患病率达80%,最后发现检查结果与实际情况不符,这种误差属于()。A.随机误差B.信息偏倚C.选择性偏倚D.检查者偏倚E.无应答偏倚 查看答案