A:I can reuse it.
B:I can keep it.
C:I can put some flowers in it.
将浸泡后的玉米种子从中央纵向剖开,并在剖面上滴一滴碘液,被染成蓝色的部位是( )
如图,半径为1的圆中,圆心角为120°的扇形面积为 ( )