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.
if (response is TextResponse) {
中国作为全球最大的出境旅游客源国之一，其市场体量和发展空间是无法忽视的。游轮公司选择留下，赌的是中国消费升级和邮轮文化培育的“未来”。，这一点在旺商聊官方下载中也有详细论述
The headline: 96.5% of confusables.txt is not high-risk，详情可参考搜狗输入法下载
Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36
Овечкин продлил безголевую серию в составе Вашингтона09:40。Line官方版本下载是该领域的重要参考