在图1-58所示的电路中,图1-58(a)中U ab =-5V,试问a、b两点哪点电位高?在图1-58(b)中U 1 =-6V,U 2 =4V,试问U ab 等于多少
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【多选题】The value of the Aerodynamic Particle Diameter of a 1μm diameter spherical particle with density 4g/cm 3 is ______. Assume that the Cunningham correctionfactor can be neglected。
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