According to the passage, the chief purpose of explorers in going to unknown places in the past was ______. At present, a proba

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问题 According to the passage, the chief purpose of explorers in going to unknown places in the past was ______.
At present, a probable inducement for countries to initiate large-scale space ventures is ______.

选项 A、international cooperation
B、nationalistic reasons
C、scientific research
D、long-term profits

答案C

解析 作者在第三段指出,火星是今天人类的下一个伟大的未探明之地。在人们不为短期回报,淡忘冷战,在大型太空探险中更加注重国际合作的情况下,除了利益或国家利益,人类探索火星显然还有别的动机。是不是科学最终会在探索中起主要作用?这一问句实则是作者的观点。
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