A.60B.80C.100D.120
A.-10V-0VB.0V-10VC.-10V-10VD.-5V-5V
A.風(fēng)喇叭B.制動(dòng)系統(tǒng)C.換擋機(jī)構(gòu)D.水路清理機(jī)構(gòu)