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1гÿһλԱS
2һεÿһſƽAòԱΪ100/A
3εԵ÷͵IJŷΪ1Ȩ֣ԲȨֳԱһε÷ֵöε÷ 4
עȨֲҪһε߷+ͷ֣/2*ͷ֣ڸȨֿã
磺߷Ϊ119ͷΪ71.4ȨֲӦڣ119+71.4/(2*71.4)=1.33,˴ȨΪ1.214,ֱʹ,ȨΪ11.211.3691.44ߴﵽ1.44ӦȨȫʹãȨӦΪ11.11.171.2ŵ÷֡òžҵ÷֡
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