附图中所画的是两个简谐振动的振动曲线。若这两个简谐振动可叠加,则合成的余弦振动的初相为((a 上学吧找答案 Template




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tomski附图中所画的是两个简谐振动的振动曲线。若这两个简谐振动可叠加,则合成的余弦振动的初相为((a 上学吧找答案 coloring