A:employing
B:having employed
C:to have been employed
D:having been employed
Computers_______ many things and we_______ these modern machines.
圆C1: x+22+y-22=1与圆C2: x-22+y-52=16的位置关系是( )
下列能直接体现公民积极参与我国政治生活的是( )