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  3. 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

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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.
Modern theories of the development of stars suggest that almost every star has some sort of family of planets.
选项 A、Y
B、N
C、NG
答案C
解析 通读全文我们可知文中并未提及有关星星的现代科学理论的发展，因此无从判断。
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