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According to the passage, the chief purpose of explorers in going to unknown places in the past was ______. By saying "With Mar
According to the passage, the chief purpose of explorers in going to unknown places in the past was ______. By saying "With Mar
admin
2009-06-24
21
问题
According to the passage, the chief purpose of explorers in going to unknown places in the past was ______.
By saying "With Mars the scientific stakes are arguably higher than they have ever been" in the fourth paragraph, the author means that ______.
选项
A、with Mars the risks involved are much greater than any previous space ventures
B、in the ease of Mars, the rewards of scientific exploration can be very high
C、in the case of Mars, much more research funds are needed than ever before
D、with Mars, scientists argue, the fundamental interests of science are at issue
答案
A
解析
由第三段可知:正如证据所能证明的一样,对火星的探索在科学领域的利害关系比以往都高。越来越多的证据表明火星上曾经有充足稳定的液体水,地球上的化石还表明这是来自火星的陨石。这些使我们更关注火星上是否有生命,生命是否会持续至今这样的问题。无论过去还是现在,对火星上是否存在生命这一问题更富总结性的回答会给研究者们提供非常宝贵的资料,以研究在何种条件范围内一颗行星能够产生复杂的使生命存在的化学条件。如果能够证明生命独立地存在于火星和地球上,这一结果会对所有科学的最深层的奥秘,即宇宙中生命是普遍存在的提供最早的具体线索。
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