外出旅游最常用的地图有( )①导游图 ②地形图 ③政治地图 ④交通图
A：②③
B：③④
C：①④
D：①②
A：Look! This is the flag of ____. Do you know?
B：Yes, I ____ about it. It has five yellow stars.
A：What is the capital ____ of China?
B：It's Beijing. Tian'anmen Square is in Beijing. It's ____ .
A：What do you ____ ?
B：Chinese.
A：Great！
随着我国民主政治的发展，公民的民主监督意识日益增强。
下列各式从左边到右边的变形是因式分解的为（ ）
