A:①②③④⑤⑥
B:①④⑤
C:①④⑤⑥
D:②④⑤
将点燃的蜡烛置于自制的小孔成像仪(如图所示)前,调节二者的位置,可以在屏上得到烛焰的____ (选填“倒立”或“正立”)的像,若只将塑料膜上的小圆孔改为三角形小孔,则像的形状____ (选填“改变”或“不变”)。
-- It's snowing. I really want to run outside and make a snowman.
-- Why not have a snow ball fight instead? It's more exciting.