2015 National Question 1 Single-choice Differentiating 2015_新课标I Paper 1.(5分)设复数z满足 $\frac { 1 + z } { 1 - z } = i$ ,则|z|=( ) A. 1B. $\sqrt { 2 }$C. $\sqrt { 3 }$D. 2 Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →