动物社会行为的特征不包括( )
A:群体内部成员之间分工合作
B:有的群体中还形成等级
C:群体内部成员各自独立生活
D:群体内部成员之间能够进行信息交流
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!
历史学家钱穆说:中国“学术思想最灿烂的时期是秦以前,政治社会最理想安定时期莫过于汉唐”。秦以前“学术思想最灿烂”是指( )