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The most exciting question of all is "Does life exist beyond the earth?" In
The most exciting question of all is "Does life exist beyond the earth?" In
游客
2025-07-31
17
管理
问题
The most exciting question of all is "Does life exist beyond the earth?" In recent years the trend has been toward the hypothesis (假设) that life is probably a normal phenomenon wherever the conditions are fight, with the added qualification that proper conditions are not necessarily only those of the earth. It was long held, for example, that life on the planet Jupiter (木星) is impossible because of its extreme cold, crushing gravity (重力) and poisonous atmosphere. But there is evidence that the giant planet is warmer below the outer, cold layers than was first thought. The combination of gases in its atmosphere could produce organic (有机的) or preorganic (有机生物的) molecules. Since no one really knows all combinations of conditions under which life can evoke (产生), it is best to be conservative (保守的) about denying the existence of life on any planet.
选项
A、does not exist
B、should not be ruled out
C、excites all scientists
D、has never been explored
答案
B
解析
由文章第二句话In recent years the trend has been toward the hypothesis(假设)that life is probably a normal phenomenon wherever the conditions are right,with the added qualification that proper conditions are not necessarily only those of the earth。“最近几年的趋势是倾向于这样的假设:只要情况适当,生命就可能是一种正常现象,所附带的条件是,适当的情况并不一定仅限于地球上的那些而已”。而文章又举例说,虽然“长久以来大家都认为,木星上因为极度的寒冷、极大的重力和有毒的大气,是不可能有生命存在的”。“但是有证据显示,…”作者最后的结论是:让is best to be conservative(保守的)about denying the existence of life on any planet.“那么对于否认其他行星上有生命存在这件事,最好还是保留些”。由此推断选项[B]“木星上由生命是不应该被排除的可能性”是正确答案。
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