-- Well, my daughter takes great interest in most of the food on the menu.
-- Thanks. _____
-- Salad, fried fish and orange juice, please.
A:Shall I take your order?
B:At your service.
C:What to follow?
D:With pleasure.
z是纯虚数;
如图所示,正弦曲线y=sinx,余弦曲线y=cosx与两直线x=0,x=π所围成的阴影部分的面积为( )
数学课上同桌互相出题,小红用⊗和△遮住“方程组2x+y=⊗2x-y=12的解为x=5y=△”中两个数让同桌猜,则⊗和△这两个数分别为( )