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2017年6月英语四级阅读理解100篇精析（13）
英语四级阅读理解分值占整个考试的35%，比重很大。英语四级备考中后期建议考生们每天进行英语四级阅读模拟练习，严格把控做题时间，下面是新东方网考研频道英语四级频道为大家整理的2017年6月英语四级阅读理解100篇精析。
The stone age, The Iron Age. Entire epochs have been named for materials.
So what to call the decades ahead? The choice will be tough. Welcome to the age
of superstuff. Material science -- once the least sexy technology – is bursting
with new, practical discoveries led by superconducting ceramicsthat may
revolutionize electronics. But superconductors are just part of the picture:
from house and cars to cook pots and artificial teeth, the world will someday be
made of different stuff. Exotic plastics, glass and ceramics willshape the
future just as surely as have genetic engineering and computer science.
The key to the new materials is researchers’ increasing ability to
manipulate substances at the molecular level. Ceramics, for example, have long
been limited by their brittleness. But by minimizing the microscopic
imperfections that cause it, scientists are making far stronger ceramics that
still retain such qualities as hardness and heat resistance. Ford Motor Co. now
uses ceramic tools to cut steel. A firm called Kyocera has created a line of
ceramic scissors and knives that stay sharp for years and never rust or
corrode.
A similar transformation has overtaken plastics. High-strength polymers now
form bridges, ice-skating rinks and helicopter rotors. And one new plastic that
generates electricity when vibrated or pushed is used in electric guitars, touch
sensors for robot hands and karate jacketsthat automatically record each punch
and chop. Even plastic litter, which once threatened to permanently blot the
landscape, has proved amenable to molecular tinkering. Several manufacturers now
make biodegradable forms; some plastic six-pack rings for example, gradually
decompose when exposed to sunlight. Researchers are developing ways to make
plastics as recyclable as metal or glass. Besides, composites – plastic
reinforced with fibers of graphite or other compounds – made the round-the-world
flight of the voyager possible and have even been proved in combat: a helmet
saved an infantryman’s life by deflecting two bullets in the Grenada
invasion.
Some advanced materials are old standard with a new twist. The newest
fiberoptic cable that carry telephone calls cross-country are made of glass so
transparent that a piece of 100 miles thick is clearer than a standard window
pane.
But new materials have no impact until they are made into products. And
that transition could prove difficult, for switching requires lengthy research
and investment. It can be said a firmer handle on how to move to
commercialization will determine the success or failure of a country in the near
future.
1. How many new materials are mentioned in this passage?
[A] Two
[B] Three
[C] Four
[D] Five
2. Why does the author mention genetic engineering and computer
science?
[A] To compare them with the new materials.
[B] To show the significance of the new materials on the future world.
[C] To compare the new materials to them.
[D] To explain his view point.
3. Why is transition difficult?
[A] Because transition requires money and time.
[B] Because many manufacturers are unwilling to change their equipment.
[C] Because research on new materials is very difficult.
[D]Because it takes 10 years.
4. Where lies success of a country in the New Age of superstuff?
[A] It lies in research.
[B] It lies in investment.
[C] It lies in innovation.
[D] It lies in application.
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发表于 2017-5-2 18:01:51