单项选择题
A.0.5 B.0.6 C.0.7 D.0.4
A.24V,0.1s B.24V,0.15s C.220V,0.1s
A.0.35 B.0.1—0.35 C.0.1—0.3 D.0.15
A.1.5 B.1.2 C.2.5 D.1.3
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