—When is the ______ time to go to Dalian?
—Spring.
A:good
B:best
C:better
The old man lives __________, but he never feels _____________.
已知一元二次方程x2﹣8x+15=0的两个解恰好分别是等腰△ABC的底边长和腰长,则△ABC的周长为( )