2021 National Question 2 Single-choice Differentiating 2021_全国乙卷 (2021·文) 2.设 $i z=4+3 i$ ,则 $z=()$ A. $-3-4 i$B. $-3+4 i$C. $3-4 i$D. $3+4 i$ 答案C Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →