选择单词,补全短文
hot China winter people old east
Shanghai is the biggest city in ____.It's in the ____ of China. It's got a lot of ____.It's an ____ city. It's very ____ in summer and it's cold in ____.
伴随着生理发育,我们的心理也会不断发生变化,出现矛盾和困惑,导致我们出现矛盾心理的变化有( )
①自我意识不断增强 ②认知能力得到发展
③情感世界愈加丰富 ④说话声音发生变化
促进森林古猿进化成为人类的根本原因是( )
如图,则多边形的周长为 ( )
下列各式能用完全平方公式分解因式的是( )