A.防火、防盜、防病、防雷 B.防火、防水、防雷、防盜 C.防雷、防災(zāi)、防水、防盜
A.PQ節(jié)點(diǎn) B.PV節(jié)點(diǎn) C.平衡節(jié)點(diǎn)
A.大于等于95% B.大于等于96% C.大于等于98%