1.长度单位1km=1000m1m=100cm1m=1000mm1km=0.6214mile1m=3.2808ft1ft=12in1in=2.54cm=25.4mm2.面积单位1hm2=10000m2=15亩=2.471acre1m2=10000cm2=10.7639ft23.容积单位1m3=1000L=220.09UKgal=264.2USgal1L=1000cm3=0.2201UKgal=0.2642USgal4.质量单位1t=1000kg=20担=2000斤=2204.61b1kg=1000 (共 566 字) [阅读本文] >>