评价目的
参考答案：
评价目的即系统评价所要解决的问题和所能发挥的作用
272. Because of the role he played in freeing the African-American from slavery, Abraham Lincoln is ______ as one of the _______ of all American presidents .
A．thought … great
B．thought … greatest
C．regarded … great
D．regarded … greatest
结构钢的用途是什么？
