正态曲线下面积有一定的规律,μ±2σ的面积占总面积的()
A.80.5%
B.85.5%
C.88.5%
D.90.5%
E.95.5%
参考答案:E
We have discussed the project for two hours. And after a short break, the discussion .
A.will carry on
B.will be carried on
C.has carried on
D.were carried on
表单的 【8】 是对象能够执行的、完成相应任务的操作命令代码的集合。