— Are you cleaning my room, Serena?
— ______. I can't bear seeing your room in a mess!
A: You are clever
B:Not at all
C:I can't help it
D:No chance
亚洲与欧洲的分界线是( )
79×58+29×58 =( )
设x,y∈R,则“x=0”是“复数x+yi为纯虚数”的( )