xcKevin
幼苗
共回答了17个问题采纳率:94.1% 举报
7、At present,the human in the solar system detected nine (eight)major planets,but only in the nearest to the Earth Mars might just have the existence of life.
8、Human life exploring the energies of most on the study on Mars,and try to transform it into human livable planet.
1年前
7