My name is Lu Sheng．I'm in Dalian．My favourite colour is white．This is my cat and it's white．What's on my chair? It's a yellow bag．Today is cold，but I still(仍然)swim in the morning．

    My name is Carla．I'm in New York．This is my dog and it's brown．It's my favourite colour．What's on the desk? It's a black pen. It's from my good friend Lisa．It's warm this afternoon．Let's play football in my school．

学习历史常常要对事件之间的因果关系进行分析，下列史实之间存在因果关系的是（    ）

①发展具有普遍性，一切事物都处在发展变化中，贵州的社会经济在不断发展

②矛盾具有普遍性，要坚持全面的观点、一分为二的观点看待贵州社会经济的发展

③主要矛盾决定事物的发展，办事情突出重点，贵州在发展中要集中力量解决主要矛盾

④矛盾具有特殊性，要坚持具体问题具体分析地看待贵州社会经济发展