a report on/about/of sth的区别a report ona report abouta report of的区别.

问题描述:

a report on/about/of sth的区别
a report on
a report about
a report of
的区别.

1 根据...做一份报告
2 一份关于...(大概范围)的报告
3 谁谁谁的一份报告