声源振动的 决定了它�出声音的音调.声源振动的越快�出声音的音调 声源振动的越慢�出声音的音调 填“越高 “越低 或“不变 题目和 Template




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tomski声源振动的 决定了它�出声音的音调.声源振动的越快�出声音的音调 声源振动的越慢�出声音的音调 coloring