问题详情

Which of the following can best describe the first paragraph？
A．An assertion is made and a specific supporting example is given.
B．A conventional model is dismissed and an alternative introduced.
C．The results of recent research are introduced and summarized.
D．Two oppos to points of view are presented and evaluated.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！