A.0.3mB.0.6mC.0.9mD.1.8m
A.IΔ>30mA,TΔ=0.1S B.IΔ=30mA,TΔ>0.1 C.IΔ>30mA,TΔ>0.1S D.IΔ>30mA,TΔ>0.1S,IΔ·TΔ≯30mA·0.1S
A.1.5mB.1.0mC.0.8mD.0.5m