本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
A music tuner uses a 550-Hz tuning fork to tutrwt8hjhofs,wc .* 13 ne the frequency of a musical 1leh qkmp7n y(63loh+instrument. If the tuner hears h ohlyq 7p3 6ek(l1mn+a beat frequency of 2 Hz, what is the frequency of the instrument?
A. It must be 552 Hz.
B. It must be 548 Hz.
C. It could be either 552 Hz or 548 Hz.
D. It is neither 552 Hz or 548 Hz.
参考答案: C
本题详细解析:
暂无
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