函数y=2x2-8x+1，当x=（ ）时，y的最（ ）值等于（ ）。
2；小；-7
---It's 10 o'clock now. You must go to bed now.
--_________, mum and dad.
--See you tomorrow. [ ]
A. Good evening
B. Good afternoon
C. Good night
D. Good morning
体循环的血液最后流入（）
A.左心房
B.右心房
C.左心室
D.右心室
E.肺静脉
Good evening