A:play
B:played
C:playing
D:are playing
设集合M={x|x=k2+12,k∈Z},N={x|x=k4+12,k∈Z}则( )
Is it _____ big apple? Yes.
下列划线词词义相同的两项是( )
①1m/s=____km/h
②120min=____h.