若正常人尿铅分布是对数正态分布,现测定400名正常人的尿铅值,以尿铅过高为异常,则其95%正常值范围为()
参考答案:D
在民间流行,有一定疗效的简单处方()
A.栓剂
B.合剂
C.糖浆剂
D.胶囊剂
E.露剂
-We could invite John and Barbara to the Friday night party.
-Yes, _______? I'll give them a call right now.
A.why not
B.what for
C.why
D.what