A:surprising
B:was surprised
C:surprised
D:being surprised
写出反义词
相信—____ 裂开—____ 节省—____
亲密—____ 高明—____ 热闹—____
已知x=1,y=2,则代数式x﹣y的值为( )
There are no ________.( )
己知:(i) +2 →一定条件 +H2O
(ii) +SOCl2→ +SO2+HCl
(iii)+R′OH→ +HCl