阅读材料，回答下列问题。

    材料一  首届世界互联网大会于2014年11月19日在浙江乌镇举行。乌镇现已成为世界互联网大会的永久会址。

    材料二  图17为“乌镇镇聚落形态变迁示意图”，图18为“乌镇‘城在田中’城镇规划图”。

完型填空。

    My name 1Tim. I'm 16 years old. I'm a junior high school student. Tomorrow is the weekend. We have no classes. My parents2 going to work, but we are going to be very busy tomorrow. My mother is going to buy a sweater 3my grandmother. My father is going to visit my aunt and uncle. I'm going to4computer games with my cousin. Tomorrow evening we are going to have 5big dinner. After dinner we are going to the cinema to see a film by car. I think we are going to have a nice weekend.

A single-parent child should have the right to enjoy normal parental love from both just as his other peers, which some psychologists see as _____to their emotional well-being.

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？