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当前学科:中国国防
题目:
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以下关于我国国防建设第一个阶段的陈述,正确的是()
A . 从1949到1953年
B . 取得了抗美援朝的顺利
C . 建立了100余所军事院校
D . 建立了海军、空军和各兵种部队
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