本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
Two pure tones are sounded t1nsua :wmm8mmog f/9 k0l 8a:sogether and a lpanzd 4: 8d q l+ edg;wbisg)o:u(4y5particular beat frequency is heard. What happens to the beat frequency if the frequency of onins4: 4( al8 wp;ldq ug:dzeo)bygd 5+e 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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