⑴What is this? ____           A. Thursday.

⑵What are these?____        B. Yes, it is.

⑶What is she wearing?____   C. They're shorts.

⑷Is this a new cap?____      D. She is wearing a blue skirt.

⑸What day is today?____     E. It's a new T-­shirt.

近几年来,轿车频频降价。然而,降价后消费者排队买车的景象并没有出现,持币待购现象似乎更严重了。对此认识正确的是(　　)

①降低价格必然会扩大销售量

②降价没有引起需求量的增多,反映了人们“买涨不买落”的消费心理

③降价对高档耐用品的影响比较小

④在通常情况下,轿车等高档耐用品的大幅度降价会导致消费者对其需求量的迅速增加

正n边形每个内角的大小都为108°，则n=（　　）