2. 职称英语
  3. [audioFiles]2015m8x/audio_ezfj_ezflisteningd_20157_071[/audioFiles]

[audioFiles]2015m8x/audio_ezfj_ezflisteningd_20157_071[/audioFiles]

游客2023-11-04  64
问题  
选项
答案                             Space Junk
    Space junk, also known as space waste, / is objects in orbit around the earth created by humans that no longer serve any useful purpose. / They consist of everything from entire spent satellites / to explosion fragments, deliberate insertion of small needles, and many other objects. / As orbits often overlap, the space junk is a potential collision risk for spacecraft. / (?) The vast majority of pieces of space junk are small particles. / Contact with these particles causes erosive damage. / The majority of the damage can be eased by adding a thin layer of metal / outside of the main spacecraft body. / However, certain portions of many satellites cannot be protected in this way, / the solar panels and windows for instance. / If a collision with larger pieces occurs, / many of the resulting fragments from the damaged spacecraft / will also be in the 1 kilogram mass range. / Consequently, these objects become an additional collision risk.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3156602.html
相关试题推荐
随机试题
最新回复(0)