小明所在班级共有50名同学,在期末班级民主推选“校先进班干部”时,他获得了42张选票,则小明得票的频数是( ),频率是( ).
42;0.84
—Are they about to have dinner?
—Yes, it ________ in the dinning room.
A.is serving
B.is served
C.is being served
D.serve
劳动保障监察最主要的管辖方式是()。
A.约定管辖
B.上级部门指定管辖
C.地域管辖
D.属人管辖