单选题Even most imaginative people have to admit that _____.Ahuman societies are as advanced as those on some other planetsBplanets other than Earth are not suitable for life like ours to stayCit is difficult to distinguish between organic parts and inorganic parts of the human bodyDorganisms are more creative than machines
单选题
Even most imaginative people have to admit that _____.
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
参考解析
解析：
文章首段“Mars looks like the only planet where life like ours could exist, and even this is doubtful.”表达了对外星球上是否有地球人的置疑，第五段“If this is the case, they may be much more tolerant of their environment, multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar carbon cycle.”说明外星球不适合现在的人类居住，故B项正确。
文章首段“Mars looks like the only planet where life like ours could exist, and even this is doubtful.”表达了对外星球上是否有地球人的置疑，第五段“If this is the case, they may be much more tolerant of their environment, multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar carbon cycle.”说明外星球不适合现在的人类居住，故B项正确。
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