2012年9月以后，我国在科技领域实现的重大突破有①辽宁舰航

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2012年9月以后，我国在科技领域实现的重大突破有
①"辽宁舰"航母正式入列海军 ②"极地漫游者"风能机器人在南极"走"出第一步
③"蛟龙"号创载人深潜新纪录 ④"神九""天宫"手控交会对接成功

A．

①②

B．

①③

C．

②③

D．

③④

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A． where

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