如图,抛物线y=﹣x2+2x+m(m<0)与x轴相交于点A(x1,0)、B(x2,0),点A在点B的左侧.当x=x2﹣2时,y____ 0(填“>”“=”或“<”号).
I can swim, I can't swim very well.
You can go to the nature park ___________. It's not far.
已知变量x,y满足{x≥1y≤2x-y≤0则x+y的最小值是( )