There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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“本来应该从从容容、游刃有余！现在是匆匆忙忙、连滚带爬！”这本来是台湾地区一位民意代表王世坚批评台北市市政管理混乱说的话，但是由于他讲话的语气相当有节奏感，富有张力，后来还被博主改编成了歌曲《没出息》，于是迅速火爆全网。不过最近，国务院台办发言人表示，这个人一边靠着“没出息”的改编热度，在网络上蹭眼球，一边又大放厥词刷存在，这种自相矛盾的作秀，真是没出息。