1.EversinceNeilArmstrongfirstsetfootontheMoonbackon21st...
问题详情:1.EversinceNeilArmstrongfirstsetfootontheMoonbackon21stJuly,1969,peoplehavebecomeaccustomed________theideaofspacetravel.2.MillionsofpeoplewatchedthefirstmoonlandingonTV,theirheartsintheirmouths,awar...