問題詳情

6. The figure shows four situations in which a source of sound S and a detector D are either movingor stationary. The arrows indicate the directions of motion. The speeds (when not zero) are all thesame. (Note that the detector in situation ③ is stationary). Rank the situations according to theapparent frequency of the source, lowest to highest.


(A) ①,②,③,④
(B) ④,③,②,①
(C) ①,③,②,④
(D) ②,①,④,③
(E) ②,①,③,④

參考答案

答案：A
難度：計算中-1
書單：沒有書單，新增