(i-1i) 2=i2-2+1i2
=-1-2-1=-4,
故选B.
. _______ the office, the foreign visitors were shown round the teaching building.
A.Having shown
B.Showing
C.Has shown
D.Having been shown
中药汤剂处方正文不包括的内容有()
A.药名
B.规格
C.剂量
D.剂数
E.费用