题目内容
（请给出正确答案）
[单选题]
振动三要素中的圆频率与频率有什么关系？ What is the relation between the circular frequency and frequency in the three elements of vibration？
A.圆频率是频率的6.28倍； The circular frequency is 6.28 times the frequency;
B.圆频率是频率的3.14倍； The circular frequency is 3.14 times the frequency;
C.频率是圆频率的6.28倍； The frequency is 6.28 times the circular frequency;
D.频率是圆频率的3.14倍； The frequency is 3.14 times the circular frequency;
答案
振幅；相位
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