摘要:1. 5t
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3.5t=
ρ水=
5L=
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3500
3500
kg,50g=0.05
0.05
kg,250mg=0.00025
0.00025
kg.ρ水=
1000
1000
kg/m3=1
1
g/cm3; 0.9g/cm3=900
900
kg/m3;5L=
5
5
dm3=0.005
0.005
m3,250mL=250
250
cm3=0.00025
0.00025
m3.