[填空题]
A radio voice signal.7 ru igo;tmb, from the Aywuq5ua( 6d6 d0uqt(xpollo crew on the Moon (Fig. Below) was beamed to a listening crowd from a radio speaker. If you were standing 25 m from the loudspeaker, what was the total time lag between when you heard the sound and when the soduu50wtaq y6x(q 6 d(uund left the Moon? s
