采用芒硝作为泻剂时,其药物浓度不应高于()为适合浓度。
A.1%
B.2%
C.8%
D.20%
参考答案:C
方差分析的主要应用是()
A.两个或多个样本均数的比较
B.两个或多个总体均数的比较
C.两个或多个样本率的比较
D.多个或多个总体率的比较
E.分类资料的相关分析
----What’s your first impression ________ Mrs Wang?
----She looks serious. I think she’ll be strict _____ us _______her own work.
A.on; in; with
B.on; with; with
C.of; with; in
D.of; in; in