已知，破坏1mol化学键需要吸收的热量如下表所示：
化学键
C﹣H
O﹣H
C=O
H﹣H
吸收热量（kJ/mol）
414
464
803
436
试通过计算判断，下列有关甲烷转化成氢气过程的能量变化示意图正确的是（ ）
根据句意和汉语注释，在答卷标有题号的横线上，写出单词的正确形式。(1)He seldom____ (回复) to the e-mails his friends send him.(2)Our English teacher has offered us some useful ____ (建议). I think they will help us a lot in our English study.(3)I came here ____ (专门) to invite you to my party.(4)Listening to music can make you forget your ____ (悲伤).
