本题目来源于试卷: Physics Unit11: Vibrations and Waves，类别为 通用国际物理
[单选题]
Resonance in a system, such as a string fixed atg5ihm *b0o1 xd both ends, occursugftgff7, 26qy ( 0rbb when
A. it is oscillating in simple harmonic motion.
B. its frequency is the same as the frequency of an external source.
C. its frequency is greater than the frequency of an external source.
D. its frequency is smaller than the frequency of an external source.
参考答案: B
本题详细解析:
暂无
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