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 and whether it still exists there.
B、To see if animals could survive there.
C、To prove the feasibility of large-scale space ventures.
D、To show the leading role of science in space exploration
答案A
解析 细节题。第四段论述了人类探索火星的目的。其中第二句提到了火星上是否存在过生命、生命是否延续到现在，且后文中又强调探索的是生命所必需的条件，及过去和现在是否存在生命，选[A]。
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