（三）阻碍执行紧急任务的消防车、救护车、工程抢险车、警车或者执行上述紧急任务的专用船舶通行的；
Falling volcanic ash has for years been viewed as a nuisance. But a Sicilian project has discovered its agricultural potential and wants to spread the word
，详情可参考51吃瓜
第三十五条 国家对放射源、射线装置实行分类管理，具体分类办法由国务院有关部门制定。
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