【多选题】下列各项中,属于计算机操作系统的有( )。
【单选题】This memorial was built _______ those heroes who laid down their lives for the liberation of the poor people. [ ]
【单选题】Migration is usually defined as 'permanent or semipermanent change of residence'. This broad definition, of course, would include a move across the street or across a city. Our concern is with movemen...
A.
are all related to economic considerations
B.
are not as decisive as push factors
C.
include a range of considerations
D.
are more important than push factors
【判断题】行政复议决定书需要经当事人确认签字后生效。 2
【单选题】Migration is usually defined as 'permanent of sempermanent change of residence'. This broad definition, of course, would include a move across the street or across a city. Our concern is with movement...