本题目来源于试卷: Physics Unit12: Sound，类别为 国际高中通用物理
[单选题]
A sound source (normal frequency of 1000 Ha;ofm*5lwubd b 0*vtwuzpy24ec6m., z) approaches a stationary observer sik )d l+sk*zv7ry:k /d*uk p;yb 4ft6at one-half the speed ofbu*)64vy t7k* ;ssirdk f+y klpzdk/: sound. The observer hears a frequency of
A. 2000 Hz.
B. 500 Hz.
C. 1500 Hz.
D. none of the above
参考答案: A
本题详细解析:
暂无
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