单选题
已知复数z=a+bi,真中a,b∈R,且b≠0,则( )
- A.<img alt="" src="http://timg.fentiku.com/img/2019-06-04/5cf624cc3ff2c.png" /><br />
- B.<img alt="" src="http://timg.fentiku.com/img/2019-06-04/5cf624cb15fc9.png" /><br />
- C.<img alt="" src="http://timg.fentiku.com/img/2019-06-04/5cf624cd97afb.png" /><br />
- D.<img alt="" src="http://timg.fentiku.com/img/2019-06-04/5cf624cd4b647.png" /><br />
正确答案:D