题目

根据短文内容，选择最佳答案。Dear Tim,Today is Saturday. It's 7:00 in the evening here. I'm writing to tell you something about my life. My father is watching CCTV news. That's his favorite program. My brother is playing computer games. My dog Dick is taking the hat to me. He wants me to put it on and go out for a walk with him. What a clever dog! My little sister is practicing playing the piano. It sounds beautiful today. Outside, I can hear cars and buses coming and going quickly. Also there are some boys playing ball games. It's really a noisy but happy evening.复数Z=3+i1-i在复平面内对应的点位于（　　）A．第一象限B．第二象限C．第一象限D．第二象限