在报表系统中,系统已经预先设置的关键字有()
A.单位名称
B.计量单位
C.年
D.月
E.季
参考答案:A, C, D, E
-If only there were no examinations!
- We all need more rest. [ ]
A.Why do you think so?
B.For what?
C.I could agree more.
D.You can say that again.
抽样误差是指
A.个体值和总体参数值之差
B.个体值和样本统计值之差
C.样本统计值和总体参数之差
D.样本统计值和总体测量值之差
E.总体测量值和总体参数之差