营养不良患儿应用苯丙酸诺龙的主要作用是（）
A.促进消化功能
B.促进食欲
C.促进糖原合成
D.促进蛋白质合成
E.增强机体免疫功能
参考答案：D
已知某地正常人某定量指标的总体均值μ=5，今随机测得该地某人群中80人该指标的数值，若资料满足条件使用，检验来推断该人群该指标的总体均值μ与μ之间是否有差别，则自由度为（）
A.4
B.5
C.76
D.79
E.80
Her sister（）a rich man. They（）for twenty years.
A. married with; have married
B. married to; have married
C. married; have been married
D. had married; have been married
