A:+4
B:+5
C:+6
D:+7
抛物线y=2(x+1)2-3的顶点坐标是( )
《培根随笔》共有____篇.
设fx为定义在R上的奇函数,当x≥0时,fx=2x+2x+b(b是常数),则f(-1)=( )
A is a person going from one place to another in a public or private
vehicle (交通工具).