• 2021-04-14
    ZHCS-B8-8*一平面简谐波沿ox轴正向传播,波动方程为y=0.1cos(0.5t-403c0x+03c0)(SI制),则在x1=0.5米处质点振动和比x2=1.0米处质点振动的位相超前()