We must remember that humans have some choice concerning our future.To some extent we can choose the direction in which our civilization develops.And choices that are made in the coming decades—such as the energy sources that we will or will not use—will have major,longterm influence on human life on Earth.We believe that,provided that research continues to show that SPS is environmentally and economically attractive,SPS will open the door to a much more attractive future for human civilization than any groundbased energy source;and one that the public will support;and that young people will find challenging and exciting.Furthermore energy from SPS can be readily used in developing countries,as the SPS 2000 project will demonstrate,thereby aiding economic development worldwide.In addition,by creating large commercial revenues(税收)for space engineering,SPS will open the frontier of space to economic development,thereby creating a limitless new field for growth of the world economy.
【解题导语】 什么是SPS?本文主要讲述了研究SPS的重要性以及其深远的意义。
40.What's the author's attitude toward the research on SPS?
A.Critical.
B.Puzzled.
C.Neutral.
D.Positive.
答案 D [全篇文章作者的语气及解说为什么要研究SPS都流露出对SPS的支持,尤其最后一段中说明它会带来世界经济的增长。因此作者的态度是positive“积极的;肯定的”。]
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