earthquake prediction，in satellites for weather forecasting and in communication systems.Even non­stick pans and mirrored sunglasses are by­products (副产品) of technological developments in the space industry!

　　While many resources are spent on what seems a small return，the exploration of space allows creative，brave and intelligent members of our species to focus on what may serve to save us.While space may hold many wonders and explanations of how the universe was formed or how it works，it also holds dangers.The danger exists，but knowledge can help human beings to survive.Without the ability to reach out across space，the chance to save ourselves might not exist.

　　While Earth is the only planet known to support life，surely the adaptive ability of humans would allow us to live on other planets.It is true that the lifestyle would be different，but human life and cultures have adapted in the past and surely could in the future.

　　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.

　　解析　推理判断题，是对作者写作目的和意图的推断。作者提出这些问题是为了引出下文要讨论的观点，故选C。

　　2．What is the reason for exploring space based on Paragraph 2?

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