新民主主义革命时期,国共两党两度携手,为反帝反封建作出了重大贡献。据此回答: |
①两次国共合作实现的共同原因是什么? |
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②两次合作中,国共两党各发生了怎样的变化? |
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③第二次合作中,中共的合作策略是什么?它产生了怎样的影响? |
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