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 music tuner uses a 5506jydop9 gbqn +9x64gs -Hzfwg0kc fl 7+s8q:pi8i tuning fork to tune the frequency of a musical instrument. If the tuner hears a beas qw8g+7i pfk08cilf:t 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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