一容器内装有N1个单原子理想气体分子和N2个刚性双原子理想气体分子,当该系统处在温度为T的平衡态时,其内能为 A. <br/> (N1+N2) (<img src="https://static.zxtiku.com/wangke/imgs/topic/bacccc4f1a9a34c153be96c55541c049.jpg"/>kT+<img src="https://static.zxtiku.com/wangke/imgs/topic/32034d5aa9a777d4db363e6cd3374661.jpg"/>kT). B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/8591e1f03f4fccf9176d86207037d0a6.jpg"/>(N1+N2) (<img src="https://static.zxtiku.com/wangke/imgs/topic/bacccc4f1a9a34c153be96c55541c049.jpg"/>kT+<img src="https://static.zxtiku.com/wangke/imgs/topic/32034d5aa9a777d4db363e6cd3374661.jpg"/>kT). C. <br/> N1<img src="https://static.zxtiku.com/wangke/imgs/topic/bacccc4f1a9a34c153be96c55541c049.jpg"/>kT+N2<img src="https://static.zxtiku.com/wangke/imgs/topic/32034d5aa9a777d4db363e6cd3374661.jpg"/>kT. D. <br/> N1<img src="https://static.zxtiku.com/wangke/imgs/topic/32034d5aa9a777d4db363e6cd3374661.jpg"/>kT+ N2<img src="https://static.zxtiku.com/wangke/imgs/topic/bacccc4f1a9a34c153be96c55541c049.jpg"/>kT.