若复数(a2-4a+3)+(a-1)i是纯虚数,则实数a的值为______. 发布时间:2017-05-19 13:32 │ 来源:www.tikuol.com 题型:填空题 问题: 若复数(a2-4a+3)+(a-1)i是纯虚数,则实数a的值为______.
题型:填空题 So difficult _____ it to live in an English-speaking country that I determined to learn English well. [ ]A. I did feel B. did I feel C. I have feltD. have I felt 查看答案
题型:填空题 长期左心衰竭患者导致慢性肺淤血,临床表现为缺氧、发绀、气促等症状。图中胞浆内含褐色颗粒的心衰细胞实质是哪种细胞()A.中性粒细胞B.嗜酸性粒细胞C.单核巨噬细胞D.淋巴细胞E.以上均不是 查看答案