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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通过远程视频方式询问的，应当向被询问人宣读询问笔录，被询问人确认笔录无误后，询问的人民警察应当在笔录上注明。询问和宣读过程应当全程同步录音录像。，详情可参考im钱包官方下载
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A separate claim that his co-host John Torode had used a severely offensive racist term was also substantiated. Torode has said he has "no recollection" of the incident.