---The beef in this restaurant tastes nice.
--- You can't find better beef in any other restaurant.
A:Why?
B:I can’t agree.
C:Are you sure?
D:Exactly.
下列诸项均是有关显微镜操作的表述,其中错误的操作是( )
已知函数fx=-x2,x≥0x2+2x,x<0,则f(2)=____ ;不等式f(x)<3的解____
在真空中传播的电磁波具有相同的()