A:relaxing as doing sport i
B:As doing sport is relaxing
C:relaxed as doing sport i
D:As doing sport is relaxed
1)校园位于山脚下,小河边,校内环境优美;
2)附近两年前建起了一家化工厂;
3)校园环境和师生健康受到严重影响;
4)请予以关注报道,引起有关部门重视。
话题参考词汇:排放污水: drain waste water 释放有毒气体: emit poisonous gas
有关部门 related departments
Dear editor,
I'm Li Hua,
Yours sincerely,
Li Hua
命题:“若-1<x<1,则x2<1”的逆否命题是( )