A:汉高祖
B:汉文帝
C:汉景帝
D:汉武帝
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. ____
①有利于推动社会诚信建设 ②有助于维护市场秩序
③能够杜绝失信行为 ④能消除市场调节的弊端