在口腔健康调查中由于调查对象的代表性差,导致调查结果与实际情况不符,这属于() A. 发布时间:2017-05-15 01:39 │ 来源:www.tikuol.com 题型:单项选择题 问题: 在口腔健康调查中由于调查对象的代表性差,导致调查结果与实际情况不符,这属于()A.随机误差B.无应答偏倚C.选择性偏倚D.检查者之间偏性E.检查者本身偏性
题型:单项选择题 —Have you heard the story of “The Merchant of Venice”? —No. When and where does the story ______ ?A.take upB.take on C.take placeD.take off 查看答案
题型:单项选择题 Peyton would probably ______ after he was caught by a Federal sentinel.A.be killedB.be beatenC.be finedD.be put into prison 查看答案