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【原文及譯文】
Since early times, people have been fascinated with the idea of life existing somewhere else besides earth. Until recently, scientists believed that life on other planets was just a hopeful dream. But now they are beginning
to locate places where life could form. In 1997, they saw evidence of planets near other stars like the sun. But scientists now think that life could be even nearer in our own solar system. One planet scientists are studying very
closely is Europa, a moon of Jupiter. Space probes have provided evidence that Europa has a large ocean under its surface. The probes have also made the scientists think that under its surface Europa has a rocky core giving off
volcanic heat. Water and heat from volcanic activity are two basic conditions needed for life to form. A third is certain basic chemicals such as carbon, oxygen and nitrogen. Scientists believe there might be such chemicals lying
at the bottom of Europa’s ocean. They may have already created life or may be about to. You may wonder if light is also needed for life to form. Until recently, scientists thought that light was essential. But now, places have
been found on earth that are in total blackness such as caves several miles beneath the ocean. And bacteria, primitive forms of life have been seen there. So the lack of light in Europa’s sub-surface ocean doesn’t automatically
rule out life forming.
26. What did scientists once believe according to the passage?
27. What have scientists found about Europa, a moon of Jupiter?
28. What have scientists come to know recently about the formation of life?
從很早以前，人們一直迷戀著地球以外的地方也存在生命的想法。直到近來，科學家們認為在其他星球上存在生命只不過是個充滿希望的夢。但是，現在他們開始查找可能有生命的地方。1997年，科學家們在恒星附近，例如太陽，
發現了行星的蹤跡?？茖W家們現在認為生命可能我們更近，就在太陽系內?？茖W家們正密切關注的地方是木衛二，木星的一個衛星。太空探測器提供了證據表明木衛二表層之下有一個海洋。探測器也讓科學家們認為木衛二表層有散發出火
山熱的巖石核心?；鹕交顒拥乃蜔崃渴巧纬傻膬蓚€基本條件。第三個是一些基本的化學物質，如碳、氧和氮。科學家們認為在木衛二海洋底部可能存在這樣的化學成分。他們可能已經創造了生命或即將產生生命。你可能在想光也是
生命形成的必要條件。直到最近，科學家們仍認為光是不可或缺的。但現在已經在地球上發現，海洋幾英里之下的黑暗的洞穴內有細菌，即原始生命形式的存在。所以不能排除缺乏光的木衛二地下海洋有生命形成的可能性。
26. 根據短文，科學家曾相信什么?
27. 科學家們發現關于木衛二的什么信息?
28. 最近，科學家就生命的形成了解到什么?
