本题目来源于试卷: Physics Unit11: Vibrations and Waves，类别为 国际高中通用物理
[单选题]
Resonance in a systemanwj f+a- xy6*, such as a string fir-37ptq gz*cyxed at both ends, occurs 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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