i-2的共轭复数是(    )A.2+I               B.2-I          

i-2的共轭复数是(    )

A.2+I               B.2-I            C.-2+I              D.-2-i

答案

思路解析

:本题考查复数及共轭复数的概念,应首先分清谁为虚部谁为实部;次之,互为共轭的两个复数实部相等,虚部互为相反数.

答案

:D

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