道路两旁栽树,一边栽了5棵,另一边栽了6棵,一共栽了多少棵?列式为 ( )
He is ________ in the pool. ( )
若1-2x2011=a0+a1x+a2x2+⋯+a2011x2011x∈R,则a0+a1+a0+a2+⋯a0+a2011=( )