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[单选题]
1970年，新中国在科学技术领域取得的重大成就是
A
第一颗原子弹试验成功
B
第一颗氢弹试验成功
C
第一颗中近程地地核导弹发射成功
D
第一颗人造卫星发射成功
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试题答案：
D
答案解释：
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