题干
1 morning, everyone. 2 Grace. Look (看).This is a 3 .It’s a nice quilt. What 4 is it? 5 yellow and white. And 6 this in English？It’s 7 .It’s 8 jacket. That’s a ruler. 9 ruler is 10 .
1 morning, everyone. 2 Grace. Look (看).This is a 3 .It’s a nice quilt. What 4 is it? 5 yellow and white. And 6 this in English？It’s 7 .It’s 8 jacket. That’s a ruler. 9 ruler is 10 .
是虚数单位，复数
的共轭复数
在复平面内对应点落在第（ ）象限． （ ）
