一九七六年的夏天，暴风雨连续不断，大沟里的水越涨越高，已经被村人训服的山洪，突然兽性大发，泄洪孔早已容不下这只猛兽，洪水翻过高高的拦洪大坝，怒吼着向下游席卷而来，真正变成咆哮的“黄河”，那几十道厚石墙就象薄纸做的一样，被它一一撕破、踢开，惊心动魄的怒吼声持续了好几个昼夜。
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