单项选择题
A.Φ(t-t1)Φ(t1-t0)B.Φ(t-t2)Φ(t2-t1)Φ(t1-t0)C.Φ(t-t3)Φ(t3-t2)Φ(t2-t1)Φ(t1-t0)D.Φ(t)Φ(-t0)
A.-Φ(t1)Φ(t2)B.Φ(-t2)Φ(t1)C.-Φ(t2)Φ(t1)D.Φ(t1)Φ(-t2)
A.Φ(-t)B.-Φ(t)C.Φ(0)D.-Φ(-t)