* LeetCode 739. 每日温度
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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Авианосцы Военно-морских сил (ВМС) США, которые в прошлых операциях практически не сталкивались с рисками, могут стать целью в случае возможного конфликта с Россией или КНР. Потенциальную угрозу для американских авианесущих кораблей оценил обозреватель 19FortyFive Харрисон Касс.
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