(单选题)76: 因果关联是指( )
A: 暴露与疾病有较强的统计学关联
B: 暴露与疾病排除偏倚后的关联
C: 暴露与疾病有时间先后的直接关联
D: 暴露与疾病分类资料存在的关联
E: 暴露与疾病有时间先后的无偏倚关联
1.(text)I.VocabularySkills(2points)Whichofthewordsbelowcontainaprefixwithanega...
1.(匹配题)I.Vocabularyskills(3points) Lookatthecolumnsbelow.Matcheachvocabular...
1.(完形填空题)1.ListentotheconversationanddecidewhetherthefollowingisT(true)orF...
1.(完形填空题)1.ListentotheconversationanddecidewhetherthefollowingisTrue(T)orF...
1.(完形填空题)1.ListentotheconversationanddecidewhetherthefollowingisTrue(T)orF...