分析材料回答下列各题。
材料一、

材料二、故帝国主义者及卖国军阀之势力不被推翻，则不但统一政府之建设永无希望，而中华民国唯一希望所系之革命根据地，且有被帝国主义者及卖国军阀联合进攻之虞。本党为实现中国人民之唯一的需要——统一政府之建设——为巩固国民革命根据地，不能不出师以剿除卖国军阀之势力。
请回答：
（1）材料一中的“陆军军官学校”是国共合作后创办的哪所军校？
（2）依据材料二，国民革命军出师北伐的原因是什么？北伐的目的是什么?
（3）材料二中的卖国军阀是哪些人？

阅读理解

A

      People in different places eat different things.

　　In South China people like to eat rice. Sometimes they eat it twice or three times a day. They usually eat it with fish, meat and vegetables. It tastes very delicious.

      Japanese like to eat rice, too. They also eat a lot of fish. Sometimes they eat raw (生的) fish. It sounds strange but smells very fresh.

　　In western countries like Britain, Australia and the USA, the most important food is bread or potatoes. People usually make their bread at home. And they cook potatoes in different ways. In England the most popular food is fish and chips. Sometimes people eat this food at ho me, in their workplace, in the park or even on the street. People call it ”take­away” food.

　　In China today, there are also much ”take­away” food, and most children like to eat them.