在行政职务上未构成隶属关系时,行政职务高的是上级,行政职务低的是下级,行政职务相当的是同级。在相互不知道行政职务时,军衔高的是上级,军衔低的是下级,军衔相同的是同级。
参考答案:对
A neighbour helped to keep our dog. It______while we were on holiday. [ ]
A. was taken care
B. took care of
C. is taken care of
D. was taken care of
正态曲线下、横轴上,从均数到+∞的面积为()。
A.95%
B.50%
C.97.5%
D.99%
E.不能确定(与标准差的大小有关)