题目

已知复数满足（为虚数单位），则的模为______． 答案：【答案】【解析】由已知求得z，再由复数模的计算公式求解.解：∵∴z＝1+i，∴ His face           an embarrassed smile when he heard the result of the competition． A.came on       B.took up        C.took on            D.turned into