2. 外语
  3. According to the passage, the chief purpose of explorers in going to unknown places in the past was ______. What is the main go

According to the passage, the chief purpose of explorers in going to unknown places in the past was ______. What is the main go

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问题 According to the passage, the chief purpose of explorers in going to unknown places in the past was ______.
What is the main goal of sending human missions to Mars?
选项 A、To find out if life ever existed there.
B、To see if humans could survive there.
C、To prove the feasibility of large-scale space ventures.
D、To show the leading role 6f science in space exploration.
答案D
解析 答案参见第三段及前题解释。
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