[衛(wèi)生法規(guī)]期望繼續(xù)享有所獲得的利益是

原題:
[衛(wèi)生法規(guī)]期望繼續(xù)享有所獲得的利益是

---

A.mean
B.variance
C.percentile
D.standard deviation
E.coefficient of variation