- Could you tell me ? - At 9:40 this Sunday.
A:what I should take
B:who you are coming with
C:where you are waiting
D:what time you are arriving
东北老工业基地出现经济发展滞后的现象,其主要原因有( )
①资源枯竭 ②设备老化 ③产业结构单一 ④距海远,对外联系不便.