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 so.f r0c gk1 o1eas/:v1a oxrxn9unded together and a -99da 0vuhl)5yplw h akqd +uzu vm*.:particular beat frequency is heard. What happens to the beat frequency if th9uwmzuv 9 a:*ayl.ld)d-0phk5q + uv he 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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