19th National Science and Technology Week starts

Source: Xinhua| 2019-05-20 07:47:25|Editor: Liangyu
Video PlayerClose

#CHINA-TECHNOLOGY-WEEK (CN)

A visitor participates in an electrical conduction experiment at the Binzhou Science and Technology Museum in Binzhou, east China's Shandong Province, May 19, 2019. The19th National Science and Technology Week is held from May 19 to 26. (Xinhua/Zhang Chunfeng)

   Prev 1 2 3  

KEY WORDS:
EXPLORE XINHUANET
010020070750000000000000011100001380726341
国产无码在线观看免费在线,37pao国产成视频,日韩一区二区视频在线,国产国产人免费人成免费视频麻豆
在线香港三级日本三级人妇 | 思思久99在热线女精品视频 | 亚洲精品国产超清 | 中文文字幕文字幕永久免费 | 亚洲国产午夜久久久久 | 在线播放中文有码国产 |