三个样本率作比较,,可认为()
A.各总体率不等或不全相等
B.各样本率不等或不全相等
C.各总体率均不相等
D.各样本率均不相等
E.以上都不对
参考答案:A
It was ______ that they all went swimming in the river. [ ]
A. such a hot weather
B. such hot weather
C. so hot weather
D.so hot a weather
工程其他费用预算编制的方法是().
A.公司总部设定内控系数上限
B.省公司自行设定内控系数上限
C.以工程概算(估算)为基础
D.按照费用明细编制预算