下列关于高分子化合物的组成、结构、性质的说法正确的是(　　)

根据短文阅读，选择正确答案。

    I'm Mary. This is my friend. Polly. Look! It is yellow and brown. It's fat. Its ears are small. Its eyes are big. Its tail is long. Polly likes fish and milk. It doesn't like fruit. Polly can hop and run. But it can't swim. It likes playing with a ball. I usually go to the park at the weekend(周末). Polly follows(跟随)me. I fly my kite in the park. Polly runs after me. What is Polly? Do you know? It's a cat.

位于武汉CBD的华中互联网金融产业基地，目前已有25家互联网金融企业进驻。为了抢占互联网金融高地，在政府部门倡导下，2015年8月，国内首个互联网金融“常青盟”成立。其宗旨是形成合力，共谋发展，推动互联网金融产业发展。从哲学上看，“常青盟”的成立表明（    ）

①人们可以根据自己的需要建立事物之间的联系

②人们发挥主观能动性可以建立有利于实践的联系

③离开了人为事物的联系，将弱化自在事物的联系

④我们应立足整体、统筹全局，实现整体功能最大化