A:Who is that little girl?
B:Who is that little boy?
反映我国长江流域农耕生活的文化遗址是( )
阅读如图所示的程序框图,运行相应的程序,若输入m=42,n=30,则输出的值为( )
圆是轴对称图形,它有____ 条对称轴,其对称轴是____ .