复数2i1-i=2i(1+i)(1-i)(1+i)=-1+i.
故选A.
What is not a reason for companies to organize lessons learned
A) Lessons learned databases are an essential element of the organizational process assets. B) Lessons learned should focus on identifying those accountable for errors and failures. C) Lessons learned sessions should bring about recommendations to improve future performance on projects. D) Phase-end lessons learned sessions provide a good team building exercise for project staff members.
申请《特种设备作业人员证》的人员,应当符合的条件不包括()项。
A、在18周以上
B、身体健康满足申请从事的作业种类对身体的特殊要求
C、高中以上文化程度
D、有与申请作业种类相适应的工作简历