This passage seems to be a (n) ______.A.book reviewB.advertisementC.news reportD.research

学历类 职业资格 已帮助 人

This passage seems to be a (n) ______.

A.book review

B.advertisement

C.news report

D.research paper

热搜:n阶方阵a与对角矩阵相似的充要条件