中文字幕无码久久人妻_中国无码a一级刺激片_国产综合色产在线观看_色多黄片资源2020

Various activities held across China to greet annual day for science popularization

Source: Xinhua| 2018-09-15 21:02:44|Editor: mmm
Video PlayerClose

CHINA-SCIENCE POPULARIZATION-ACTIVITY (CN)

A staff member makes pottery during a science popularization activity in Hexi District of north China's Tianjin, Sept. 15, 2018. A variety of activities were held across the country to greet the annual day for science popularization in China. (Xinhua/Yue Yuewei)

   Prev 1 2 3 4 5 6 7 8 9 Next  

KEY WORDS: science
EXPLORE XINHUANET
010020070750000000000000011100001374702441