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]
Two pure tones are sounded togetherh f2-btw+/glls xw 68qn*8ecur4 7.(gwer livb+:go7 ) eolr v and a particular beat frequency is heard. What happens to the beat frequency if tho7e igrv n(:gu4e)w* r7v orcb+.8ell e frequency of one of the tones is increased?
A. It increases.
B. It decreases.
C. It does not change.
D. It could either increase or decrease.
参考答案: D
本题详细解析:
暂无
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