We bought a bike for you.
质量为m的木块静止在一固定的斜面上,已知动摩擦因素为μ,斜面倾角为θ,木块所受摩擦力为( )
The company has produced a new type of computer. You will probably see the product _______ wherever you go.
设函数fx=2x,x<0gx,x>0若fx是奇函数,则g(2)的值是( )