A:ρ
B:
C:3ρ
D:
— Excuse me, but could you tell me when the banks will be open today? —_______. It's a public holiday.
我国是一个临海国,濒临的海洋从北到南依次是( )
为了灯泡经久耐用,常向灯泡充的气体是( )
要求:①文中不要泄露自己的信息。②字数:600 字以上。