A:2πR,2πR
B:0,2πR
C:2R,2R
D:2πR,2R
—I don't know ____ .—Because he has to look after his mother.
150×40=____ 603×24=____ 596×26=____
如果让你说出你最喜爱的一种动(植)物你会想到:你会怎样细心呵护它: