人造地球卫星、宇宙飞船、航天飞机等航天器进入轨道后,其中的人和物将处于完全失重状态.你能想象出完全失重的条件下会发生什么现象吗?物体将飘在空中;液滴呈绝对球形;宇航员站着睡觉和躺着睡觉一样舒服;走路务必小心,稍有不慎,将会“上不着天, After orbiters such as man-made earth satellites, spacecraft, and space shuttles enter orbit, people and things in them will be in complete weightlessness. Can you imagine what will happen under conditions of total weightlessness? Objects will float in the air; droplets Absolutely spherical; the astronaut stands sleeping and is as comfortable as lying down to sleep; he must be careful when he walks, if he is careless, he will “get out of the sky.”