含有极性键且分子中各原子都满足8电子稳定结构的化学式是
[ ]
A. CH4
B. CH2=CH2
C. CO2
D. N2
答案：C
mother, businessman, student, name, doctor, family, father
MME时处理（）和（）吉安信令交互的控制节点
My ___________ lives in China. 
I am a ___________. My ___________ is Li Ming.
My ___________ is a ___________. His ___________ is Li Daming.
My ___________ is a ___________. Her ___________ is Liu Yun.