推销只有在满足顾客利益的前提下，才能实现企业的经济效益和社会效益。
参考答案：对
If he my advice, he wouldn’t have lost his job.
A．followed
B．should follow
C．had followed
D．would follow
验算软弱下卧层强度时，软弱下卧层顶面的压力与承载力应符合下列( )的组合。
A．Pz+Pcz ≤fak B．Pz≤fazC．Pz+Pcz≤faz D．Pk≤faz
