A:Therefore
B:And
C:However
D:Beside
x
1
2
3
4
5
f(x)
扇形AOB的周长为8cm.,它的面积为3cm2,求圆心角的大小.
A. spring B. farm the land
C. go on outings D. new green leaves
E. warmer and warmer F. fly kites
G. longer and longer H. four seasons