问题
选择题
| — How long has she ______? — Since 1998. |
A.lived here B.come here C.met Li Lei D.joined the club |
答案
答案：A
搜题请搜索小程序“爱下问搜题”
| — How long has she ______? — Since 1998. |
A.lived here B.come here C.met Li Lei D.joined the club |
答案：A
2NH3（g）△H=-38.6kJ·mol-1；将1.5NA的H2和过量N2在此条件下充分反应，放出热量19.3kJ