Reasons: the unity and cooperation of the two parties and the unprecedented unity of the revolutionary classes are the fundamental reasons; Clear business objectives and correct policies;

Strong support from the workers' and farmers' movements; Soldiers of the Northern Expeditionary Army fought bravely, especially party member, who was born in * * * *, and played a vanguard and exemplary role. wait for

Influence: The cooperation between the state and the Communist Party of China (CPC) established the revolutionary united front and promoted the vigorous development of the national revolution. At the same time, the two parties, the state and the Communist Party of China (CPC), formulated the correct Northern Expedition policy, which provided a solid foundation for the successful March of the Northern Expedition.

(2) A: During the Northern Expedition, imperialism openly intervened in the China Revolution, and successively created the Wanxian Massacre, the Ming Tombs Massacre and the Nanjing Massacre. (√)

B: Wang Jingwei launched a counter-revolutionary coup in Shanghai on July 15th. (×)

C: With the victory of the Northern Expedition, Wuhan once became the revolutionary center of the whole country. (√)

This topic requires writing a review, which is full of life and well reflects this requirement. The first question should be answered from three aspects: object, reason and influence. The second question is a judgment question, which is novel and requires candidates to accurately grasp historical facts.