(Ⅱ)设x,y∈R,复数z=x+yi,且满足|z|2+(z+ z¯ )i= 3−i2+i ,试求x,y的值.
北方和南方的界限与多少毫米降水量线吻合?( )
我国濒临的海洋,从北到南依次是( )
The most important thing ______we should think about is ______ we should do next.