Early physical attractiveness predicts a more socially effective personality in adulthood. Early physical appearance may serve as a slight but consistent predictor of how well a person navigates social situations later in life.
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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// Hook the 'src' property setter on ALL media elements, forever
"command": "cmdFetchCart",
在手机不能缺席的未来，三星给出的答案