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2020-05-23View Original

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{"일일 문제"理论基础}
Reply #22020-05-23
{"선택 문제:下面几种说法中,正确的说法是() (A)波源不动时波源的振动周期与波动的周期在数值上是不同的。(B)波源振动的速度与波速相同。(C)在波传播方向上的任一质点振动相位总是比波源的相位滞后。(D)在波传播方向上的任一质点振动相位总是比D源的相位超前。 �答案:C 提示:能阐述出解题过程的给予额外奖励,答案回复可见!"}
Reply #32020-05-23
6
Reply #42020-05-24
7)在波传播方向上的任一质点振动相位总是比D源的相位D前
Reply #52020-05-24
6

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