As a young man , he’d rather have a room of his own, however small it is, than __ a room with someone else．

A．to share

B．to have shared

C．share

D．sharing

在烃分子中去掉两个氢原子形成一个双键是吸热反应,大约需要17kJ·mol^-1~125 kJ·mol^-1的热量,但1,3-环已二烯失去两个氢原子变成苯是放热反应,ΔH= -23．4 kJ·mol^-1,以上事实表明[ ]

A．1,3-环已二烯加氢是吸热反应

B．苯加氢生成环已烷是吸热反应

C．1,3-环已二烯比苯稳定

D．苯比1,3-环已二烯稳定