用手按在自行车的铜铃上无论怎样用力敲打铃声也不会清脆这是因为a．手按在铃上声音传不出来b．手按在铃上铃根本不振c．手按在铃上影响了 Sketch Coloring Page

用手按在自行车的铜铃上无论怎样用力敲打铃声也不会清脆这是因为a．手按在铃上声音传不出来b．手按在铃上铃根本不振c．手按在铃上影响了 Template

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