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±í7-2 x(m) y(m) 60 24.95 0 37.71 70 22.42 10 34.96 80 19.56 20 33.20 90 16.20 30 31.34 100 11.94 40 29.37 110 4.75 50 27.25 110.85 3.42 Õý³£Ðîˮλʱ°Ó¶¥¸ß³ÌΪ608.6m£¬Õý³£ÐîˮλΪ607.4 m£¬ºÓ´²¸ß¶ÈΪ591.3 m£¬°Ó¶¥¿í¶ÈΪ8m£¬°Ó¸ßΪ38m£¬m1=3.0m2=2.5¡£

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