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D:
如图,给定一个半径长为2的圆,圆心O到水平直线l的距离为d,即OM=d.我们把圆上到直线l的距离等于1的点的个数记为m.如d=0时,l为经过圆心O的一条直线,此时圆上有四个到直线l的距离等于1的点,即m=4,由此可知:
①当d=3时,m=____ ;
②当m=2时,d的取值范围是____ .
— Nora published her first poem when she was only seven!
— At seven? What a ! I knew few words at her age.