A、deteriorates
B、increases
C、are fouled
D、becomes better
更多“Electric insulation is made of organic substances and so gradually （） with age.”相关的问题
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A、A.draw a one line diagram of the circuitry B、B.test all fuses and measure the line voltage C、C.take megger readings D、D.insulate the apparatus from ground
A、heat-resisting acrylic B、heat-resisting aluminum C、insulating varnish D、insulating white lead
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A、After operation, start the electric motor. B、Before operation, stop the electric motor. C、Before operation, start the electric motor. D、After operation, stop the electric motor.
A、good insulation B、bad insulation C、high insulation power factor D、a high slot discharge factor
A、A.Megohm meter, insulation light and synchroscope B、B.Synchroscope, synchro light and megohm meter C、C.Shore power switch, insulation light and synchroscope D、D.Megohm meter, insulation light and shore power switch
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