摘要：4．单位换算: (1) 150cm = m = mm (2)3550 cm 3 = m3 (3) 54km = m= cm = μm (4) 2.5m2 = cm2= dm2 (5) 1ml= cm3 2.2L = dm3= m3= cm3 (6) 36kg= t= g= mg (7) 0.5h= s 15min= s= h (8)5m/s= km/h 72km/h= m/s
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nm= mm= dm