A.Y2=Acos[2πt-π/2] B.Y2=Acos[2πt-π] C.Y2=Acos[2πt+π/2] D.Y2=2Acos[2πt-0.1π] A.Y2=Acos[2πt-π/2] B.Y2=Acos[2πt-π] C.Y2=Acos[2πt+π/2] D.Y2=2Acos[2πt-0.1π] 分类:电气工程师 题型:选择题 查看答案