A.成正比 B.成反比 C.無關(guān)
A.與電源電壓U12成正比,與臨界轉(zhuǎn)差率Sm無關(guān) B.與電源電壓U12成反比,與臨界轉(zhuǎn)差率Sm無關(guān) C.與電源電壓U12成正比,與臨界轉(zhuǎn)差率Sm有關(guān) D.與電源電壓U12成反比,與臨界轉(zhuǎn)差率Sm有關(guān)
A.Tmax不變,臨界轉(zhuǎn)差率Sm減小 B.Tmax減小,臨界轉(zhuǎn)差率Sm減小 C.Tmax不變,臨界轉(zhuǎn)差率Sm增大 D.Tmax增大,臨界轉(zhuǎn)差率Sm增大