在传统的中国社会里,()是社会生活的基本单位。
参考答案:家庭
When I arrived at the company, the manager ______, so we had only time for a few words.
A.just went away
B.had gone away
C.was just going away
D.has just gone away
应用分凝分离器技术的脱甲烷系统会增加三机及脱乙烷塔等的投资。