下面是某同学在测肺活量时,记下的三次数值,分别是:3200mL、3500mL、3800mL,则该同学的肺活量应为( )
A:3200 mL
B:3500 mL
C:3800 mL
D:10500 mL
儒家学派的创始人是( )
It was a difficult time for the relatives of Missing MH370 passengers when they heard the bad news , but they didn't ________ hope.
六个正方形(如图)重叠,连接点正好是正方形的中点,正方形边长是a,则图的周长是____ .