What does the word "cheer" (Line 2, Para. 1) imply? Even most imaginative people have to admit that ______ .

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问题 What does the word "cheer" (Line 2, Para. 1) imply?
Even most imaginative people have to admit that ______ .

选项 A、human societies are as advanced as those on some other planets
B、planets other than Earth are not suitable for life like ours to stay
C、it is difficult to distinguish between organic parts and inorganic parts of the human body
D、organisms are more creative than machines

答案B

解析 细节题。B意为:“外星不适合地球上的生命存活下去。”文章的第一段说,即使火星与地球环境条件相似,我们也没有把握断定火星上会有类似于地球上的生命形式存在。另外,从第五段中对于发达的外星人的推测,外星也不适合现在的人类居住。所以B项是正确答案。
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