问题
选择题
— ______________________
— I have a headache. [ ]
A. What are you doing?
B. What do you like?
C. What's wrong with you?
D. What are you going to do?
答案
答案：C
搜题请搜索小程序“爱下问搜题”
— ______________________
— I have a headache. [ ]
A. What are you doing?
B. What do you like?
C. What's wrong with you?
D. What are you going to do?
答案：C
N2(g)+
H2(g)====NH3(g) ΔH＝_________________。