如图,AOE是一条直线,图中的角共有( )
A:4个
B:8个
C:9个
D:10个
已知:a2﹣3a+1=0,则a+1a﹣2的值为( )
5×3=____
4×6=____
6×3=____
5×6=____
9.56×8=____
____ ____ does Grace do online shopping?