1000 B=nul ×1400×4x×10-×0.7≈1.31 2丌×0.15 =NBS=100031×x(0.02)≈1.63 L=y=2.34H (2R-0.001)0+×0.001 B ≈0.258 (2zR-0.00)+×0001 L-y NBs 0.943H( ) ( ) ( ) ( ) ( ) 7 2 0 0 1 1000 1400 4 10 0.7 1.31 2 0.15 1000 1.31 0.02 1.63 2.34 H 2 2 0.001 0.001 0.258 1 1 2 0.001 0.001 0.943 H B n I NBS L I B B NI R NI B R NBS L I I              − = =       = =    = = = − +  =  − +  = = =