求下图中阴影部分的面积.
面积是____cm2
有学者认为:“公元1500年前后,传统的地区自治便开始让位于全球统一。各个种族不再互相隔绝,因为成千上万的人自愿或不自愿地移居到新的大陆。”该论断表达的主旨是( )
A. She's my mother.
B. I have a happy family.
C. What's this?
D. This is my father.
Rose: ____
Tom: It's a picture (照片) of my family.
Rose: Who's this?
Tom: ____
Rose: Who's she?
Tom: ____ And this is me.
Rose: Are you happy?
Tom: Yes. ____