文档介绍：同源高考
中国空间站开展首次太空授课活动，开启了“天宫课堂”第一课。“太空教师”翟
志刚、王亚平、叶光富在中国空间站为广大青少年带来了一堂精彩的太空科普课。
First live cla conditions. First, Ye demonstrated experiments related to cell growth in the
weightless environment in space with a video clip. They compared the growth and shape of
cells in artificial gravity and zero ⁃ gravity to study their changing rules and mechanisms.
They look amazing in space, as if they are beating, he said, explaining that the beating
“ ”
and gleaming occurred as the living cells had a bioelectrical reaction. Ye and Wang then
demonstrated and explained why astronauts cannot walk in space like they did on the Earth
and how they turn around in zero gravity. The team also conducted an experiment to show
how lack of gravity causes loss in buoyancy , an experiment using water refraction
（浮力）
in a weightless environment using a water ball.
At the end of the 60⁃minute class, the three astronauts tried to arouse students􀆳 curios⁃
ity through a real⁃time question and answer session. They answered the questions and
wrapped up the class with their best wishes. The secrets of space and science are bound⁃
“
less, and the future is yours, said Zhai, commander of the Shenzhou⁃13 mission.
”