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Even intelligent life on earth couldn’t send radio waves half a century ago. So it would be impossible for any intelligent being
Even intelligent life on earth couldn’t send radio waves half a century ago. So it would be impossible for any intelligent being
admin
2013-06-17
32
问题
Even intelligent life on earth couldn’t send radio waves half a century ago. So it would be impossible for any intelligent beings to exist on any other planet at that time.
The author says that silicones might replace protein on hot planets because silicones may remain stable under very high temperatures.
选项
A、Y
B、N
C、NG
答案
A
解析
由倒数第二段中的“There are molecules called silicones which could conceivably be built into complex structures able to survive high temperatures”及前面的“it could scarcely be based on ordinary protein”可知既然普通的蛋白质不能经受住高温,那么作者推断硅酮有可能取而代之。
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0
大学英语四级
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