高清一级淫片a级中文字幕,亚洲无码免费在线小视频,精品国产群3p交换,国产初次视频观看

Home>>

Beijing students produce artificial clouds, snowflakes

(Xinhua) 10:52, December 07, 2021

Teachers and students of Beijing No.5 High School carry out extracurricular activities themed "SciTech Aids Winter Olympic with Campus Wisdom", Dec. 6, 2021. The activities include such projects as producing artificial clouds and snowflakes.(Xinhua/ZhouLiang)

Teachers and students of Beijing No.5 High School carry out extracurricular activities themed "SciTech Aids Winter Olympic with Campus Wisdom",Dec. 6,2021. The activities include such projects as producing artificial clouds and snowflakes.(Xinhua/ZhouLiang)

Teachers and students of Beijing No.5 High School carry out extracurricular activities themed "SciTech Aids Winter Olympic with Campus Wisdom",Dec. 6,2021. The activities include such projects as producing artificial clouds and snowflakes.(Xinhua/ZhouLiang)

(Web editor: Shi Xi, Liang Jun)

Photos

Related Stories