A.0.5 B.1 C.3 D.6
A.諧波次數(shù)越高,其幅度越高 B.諧波次數(shù)越高,其幅度越低 C.諧波次數(shù)越低,其幅度越低 D.以上說(shuō)法都不對(duì)
A.3.3 B.1.5 C.1.8 D.4.8