关于振动和波动下列说法正确的是 A单�做简谐运动的�期与�球的质量有关b部队过桥不能齐步走而要便步走是为了避免桥梁�生共振现象c Template




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tomski关于振动和波动下列说法正确的是 a单�做简谐运动的�期与�球的质量有关b部队过桥不能齐步走而要便步走是为了避免桥梁�生共振现象c coloring