用一根长1 m的轻质细绳将一幅质量为1 kg的画框对称悬挂在墙壁上。已知绳能承受的最大张力为10 N。为使绳不断裂,画框上两个挂钉的间距最大为(g取10 m/s2)( ) A.m B.m C.m D.m 答案:A 4.The new kind of car is _____ dear,I don't have _____ money.( )A.too much; much tooB.much too; too muchC.too much; too muchD.much too; much too