国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

An elementary school student in Shanghai will no longer have to worry about his father drinking and driving after he invented a gadget which automatically cuts off the power once it "smells" alcohols in the car.

The gadget Zhou invented functions as an alcohol-monitoring machine, which will be fastened to the metre board in front of the driver's seat. The device continuously samples the air exhaled by the driver. Once the percentage of alcohol in the air reaches a risky level, the gadget, which connects to the electric circuit of the car, automatically and immediately cuts the power. Zhou won a second-place prize at a national children's invention competition for the device a few days ago.

A local automotive expert said Zhou's invention was practical and should be introduced to the market soon.