客户维系和挽留工作在客户入网后企业必须掌握详实的客户资料，作为客户行为分析的基础信息。（）
参考答案：错
In relation to the Companies Law:
(b) describe the circumstances in which the rule relating to separate personality may be ignored, with personal liability imposed on members or directors. (6 marks)
离心泵叶轮的主要作用是对液体做功增加液体的压能力。
