—I want to win the first prize in the coming school English competition.
—________.
A:I bet you do
B:What's it about
C:Nice work
D:I'll see to that
若函数fx=sin3x+φ,满足fa+x=fa-x,则fa+π6的值为( )
读图,回答下面小题
如图(1),在边长为a的大正方形中剪去一个边长为b的小正方形,再将图中的阴影部分剪拼成一个长方形,如图(2).这个拼成的长方形的长为30,宽为20.则图(2)中Ⅱ部分的面积是____.