长度单位:
1km=1000m=103m;
1dm=0.1m=10-1m;
1cm=0.01m=10-2m;
1mm=0.001m=10-3m;
1μm=0.000001m=10-6m;
1nm=0.000000001=10-9m;
电容:
法(F)微法(μF)和皮法(pF)为单位。
三个单位之间的换算关系为:1F=10^6μF=10^12pF
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