2021 National Question 2 Single-choice Differentiating 2021_全国乙 Paper 2.设$iz i= +4 3$ ,则 $z =$ ( ) A. - -3 4iB. –3 4+ iC. 3 4- iD. 3 4+ i Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →