题目

复平面上矩形的四个顶点中，所对应的复数分别为,,.则D点对应的复数是（）A. B. C. D. 答案：【答案】B【解析】分析：先设D(x,y),再根据得到点D的坐标，即得D对应的复数.详解：D(x,y),由题得，因为，所以所以D(-3，-2).所以点D对应的复数为，故答案为：B阅读短文,写一写下列物品的数量。Hello, I'm Tim. I'm a boy. Tom is my brother. We are twins. We are nine. We are from the USA. We have twenty pencils, twelve books, eleven pens, seventeen crayons and fifteen erasers.【1】_________【2】_________【3】_________【4】_________【5】_________