1.Why does the author mention the questions in Paragraph 1?
A.To express his doubts.
B.To compare different ideas.
C.To introduce points for discussion.
D.To describe the conditions on Earth.
2.What is the reason for exploring space based on Paragraph 2?
A.Humans are nature-born to do so.
B.Humans have the tendency to fight.
C.Humans may find new sources of food.
D.Humans don’t like to stay in the same place.
3.The underlined word “spin-offs” in Paragraph 4 probably refers to ________.
A.survival chances
B.potential resources
C.unexpected benefits
D.physical
possessions
4.What makes it possible for humans to live on other planets?A.Our genetic makeup.
B.Resources on the earth.
C.The adaptive ability of humans.
D.Byproducts in space exploration.
本文是一篇议论文,向我们阐述了人类进行太空探索的原因。人类的基因构成决定了人类探索其他领域包括太空的能力。人类探索太空可能暂时没有多大用处,但是在将来这可能会帮助人类生存下去。
1.解析:选C。推理判断题。作者在第一段提出问题目的是引出下面要讨论的话题。
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