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【单选题】
中国冰川学家和气候学家大河，长期从事冰冻圈与全球气候变化研究，多次主持赴南北极和喜马拉雅等地的科学考察，提出冰冻圈科学理论框架，并以此指导冰冻圈相关问题的研究。2013年10月，他获得了被誉为环境与可持续发展领域的“诺贝尔奖”——“沃尔沃环境奖”。大河的经历表明（） ①人生价值在于奉献社会并得到社会的承认 ②投身实践是实现人生价值的根本途径 ③从事科学研究能更好地实现人生价值 ④要在个人与社会的统一中实现人生价值A.
①②
B.
③④
C.
①③
D.
②④
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