A.0~10ms B.20~30ms C.10~20ms D.30~40ms E.40~50ms
A.方波與階梯波之比 B.階梯波與階梯波之比 C.三角波與方波之比 D.三角波與三角波之比 E.方波與方波之比
A.0~50s B.100~200s C.200~300s D.50~100s E.300~400s