G____ speaking, almost all the kids are curious about how everything around them works.
将适当的物理名词填在方框中.
①____;
②____.
设0<a<1,函数fx=logaa2x-2ax-2,则使f(x)<0的x的取值范围是( )
已知函数fx=cos2x+φ满足fx≤f1对x∈R恒成立,则( )