An important feature of a society in which people

外语类 已帮助 人

An important feature of a society in which people live a long life is that________.

A.it places more emphasis on educating the young

B.it is both wise and energetic

C.it lacks the curiosity to experiment what is new

D.it welcomes changes

热搜:n维列向量组a1,an-1线性无关,且与非零向量正交