解析库 > 填空经典1290题
Compared to Earth over most of its 4 to 6-billion-year history, the world we live in today is quite (i)_____. Of course, it is human nature to regard the world that we are used to as (ii)_____. The oceans, prairies, and mountain chains---even the air we breathe---seem the norm and therefore (iii)_____.
atypical , permanent , eternal 显示答案