2008 National Question 1 Single-choice Differentiating 2008_退役省自主命题 (2008·理) 1.复数 $\frac{i(2+i)}{1-2 i}$ 等于 A. $i$B. $-i$C. 1D. -1 Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →