① ____ A. cold
② ____ B. outside
③ ____ C. hot
④ ____ D. inside
张明读书不用功,经常不按时完成作业,考试成绩也十分不理想,老师批评他,他却总是抱怨老师对他不够宽容。
请回答:
②C(s)+O2(g)═CO2(g);△H=﹣393.51kJ•mol﹣1
则反应C(s)+CO2(g)═2CO(g)的△H为( )
_________ he was very tired, he continued working in his office.