Graphene's superstrength lies in the fact that .
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1 .According to the last two paragraphs, what did the previous researchers think about the human eye's light-sensing system?
A The human eye had two light-sensing systems. B The human eye had one light-sensing system. C The human eye could sense the light of day more quickly than the dark of night. D The human eye could reset our internal clocks in accordance with the alarm clocks.
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A Big technology. B Creative ways. C Graphene. D Both A and B.
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A It can be used to make paper. B It is possible to see it with our naked eye. C It is easy to find graphene. D It is possibly the thickest material in the world.
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A request B polish C use D put
5 .Which of the following is NOT meant in the last two paragraphs?
A Graphene is made of graphite, one of the softest materials in the world. B Graphite is made of layers of graphene, the thinnest material in the world. C When we get to the thinnest possible layer of graphite, we find graphene. D With a pencil, a sheet of paper and a piece of adhesive tape, we can ...
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