下列的实验和实例中能说明声音的产生或传播条件的是�把�声的音叉放进水盆里看到溅出水花�二胡�声时用手按住琴弦琴声就消失了�拿一张硬 Template




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tomski下列的实验和实例中能说明声音的产生或传播条件的是�把�声的音叉放进水盆里看到溅出水花�二胡�声时用手按住琴弦琴声就消失了�拿一张硬 coloring