Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
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第三十四条 组织、领导传销活动的，处十日以上十五日以下拘留；情节较轻的，处五日以上十日以下拘留。，更多细节参见服务器推荐
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04