A. 100% B. 75% C. 50% D. 25%
A. 短路的瞬間 B. 短路以后0.01s C. 短路以后0.02s D. 短路進(jìn)入穩(wěn)態(tài)以后
A. 100%,100% B. 100%,50% C. 100%,70% D. 50%,50%