按照作图规则作一直线图,并计算直线斜率和-|||-重力加速度g(提示: 摆长L为自变量,原点可-|||-以取 L=45cm , ^2=(1.8{S)^2} )。-|||-摆长L 46.1 56.5 67.3 79.0 89.4 99.9-|||-(cm)-|||-周期-|||-^2((S)^2) 1.858|2.271|2.706|3 3.183|3.603|4.032|