50) They may teach very well and more than earn their salaries but most of them make litt

学历类 公共英语 已帮助 人

50) They may teach very well and more than earn their salaries, but most of them make little or no independent reflections on human problems which involve moral judgment.

热搜:n维列向量组a1,an-1线性无关,且与非零向量正交