若复数z=2-i,则.z+10z等于( ) A.2-i B.2+i C.4+2i D.6 发布时间:2017-04-11 21:11 │ 来源:www.tikuol.com 题型:选择题 问题: 若复数z=2-i,则.z+10z等于( )A.2-iB.2+iC.4+2iD.6+3i
题型:选择题 Helen ______ a book about China when I went to visit her last year but I haven't read it yet. [ ]A. has written B. wrote C. had written D. was writing 查看答案