A.0.01cm B.0.01m C.-0.01m D.0.01mm
A.波速為C B.波長(zhǎng)為2π/C C.周期為1/B D.圓頻率為C
A.36m和6m/s B.36m和9m/s C.12m和6m/s D.12m和9m/s