单项选择题
A.5sB.10sC.5s/dD.10s/d
A.-0.8s/d ~0.8s/dB.-1.5s/d ~1.5s/dC.-1.8s/d ~1.8s/dD.-2.0s/d ~2.0s/d
A.-0.8s/(d·V)~0.8s/(d·V)B.-1.5s/(d·V)~1.5s/(d·V)C.-2.0s/(d·V)~2.0s/(d·V)D.-2.5s/(d·V)~2.5s/(d·V)
A.-2.5B.-2.0C.1.5D.2.5
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