A.10.823gB.10 .8235gC.10.824gD.10.83g
A.100.0003MHzB.10000034MHzC.100.000341MHzD.100.0001413MHz
A.l s =(100.01280±0.00048)mm,k =2B.l s =(100.0128±0.0005)mm,k =2C.l s =(100.0128±0.00048)mm ,k =2D.l s =(100.013±0.0005)mm,k =2