国内精品一区二区三区最新_不卡一区二区在线_另类重口100页在线播放_精品中文字幕一区在线

Several children experience the "air shot" at a science show promoting the concept of energy conservation, environmental protection, and other science knowledge, in Kunming, northwestern Yunnan Province, on Sunday, Sept. 16, 2007.

Children experience the "human body conductor" at a science show promoting the concept of energy conservation, environmental protection, and other science knowledge, in Kunming, northwestern Yunnan Province, on Sunday, Sept. 16, 2007.

(CRI.cn September 17, 2007)