I can’t decide ______.
You mean the purple blouse or the blue one?
A:what to buy
B:which to choose
C:which should I take
D:how I will make the choice
请结合图表完成下列各题:
下图是两条大河示意图,图中小岛因泥沙不断堆积而扩展,可能出现的情况是( )
如图是一个几何体的俯视图,则该几何体可能是( )