∵复数2-i1+i=(2-i)(1-i)(1+i)(1-i)=1-3i2，
故选D．
In my opinion, it is not so helpful to give someone some bread as it is to teach him how to ________. [ ]
A. make sense
B. make progress
C. make a life
D. make his way
需要他人帮助转移的患者，其关键肌力一般小于（）
A.1级
B.2级
C.3级
D.4级
E.5级
