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石墨烯——改变世界的神奇新材料

一片碳,看似普通,厚度为单个原子,却使两位科学家海姆和诺沃肖洛夫赢得2010年度诺贝尔物理学奖.这种全新材料名为“石墨烯”.

石墨烯不仅“最簿、最强”,作为电导体,它和铜有着一样出色的导电性;作为热导体,它比目前任何其他材料的导热效果都好.利用石墨烯,科学家能够研发一系列具有特殊性质的新材料.比如,石墨烯晶体管的传输速度远远超过目前的硅晶体管,因此有希望应用于全新超级计算机的研发;石墨烯还可以用于制造触摸屏、发光板,甚至太阳能电池.如果和其他材料混合,石墨烯还可用于制造更耐热、更结实的电导体,从而使新材料更薄、更轻、更富有弹性,从柔性电子产品到智能服装,从超轻型飞机材料到防弹衣,甚至未来的太空电梯都可以以石墨烯为原料.因此其应用前景十分广阔.

(1)这种新材料属于____(填“导体”或“绝缘体”).

(2)石墨烯应用于超级计算机的研发,是因为__________.

(3)石墨烯的应用领域十分广泛,请你从材料中找出两例_____________.

答案

(1) 导体(2)石墨烯晶体管的传输速度远远超过目前的硅晶体管(3)柔性电子产品、智能服装、超轻型飞机材料、防弹衣、太空电梯 (只写一个不给分)

(1)石墨烯和铜一样具有出色的导电性,所以石墨烯是导体.

(2)石墨烯应用于超级计算机的研发,石墨烯晶体管的传输速度远远超过目前的硅晶体管.

(3)石墨烯的应用领域十分广泛,柔性电子产品、智能服装、超轻型飞机材料、防弹衣、太空电梯等.

单项选择题

Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright.
Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (98) .
Is there an adaptive value to (99) intelligence That’s the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we’ve left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I’ve ever met.
Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in (110) the results are inconclusive.

A.off

B.behind

C.over

D.along

判断题