_______ Lily _______ Sam likes popular songs, so they went to Lin Feng's concert together last night.
A:Neither; nor
B:Not only; but also
C:Both; and
D:Either; or
下列说法中符合生活实际的是( )
已知扇形的半径为4cm,圆心角为120º,则此扇形的弧长是____cm.
如果直线a、直线b都和直线c平行,那么直线a和直线b的位置关系是( )