—She is_____ a picnic.
A:have
B:has
C: having
—Thanks for reminding me of it. I will.
设U=R,若集合A=x|y=logx-x2+x,则CUA等于( )
已知:(□+△)×0.3=4.2 □÷0.4=12
求:□=____
△=____