2017年英语六级选词填空巩固练习题
All the treasures of the earth would not bring back one lost moment.以下是小编为大家搜索整理的2017年英语六级选词填空巩固练习题,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!
A novel way of making computer memories, using bacteria FOR half a century, the (1) __________of progress in the computer industry has been to do more with e's law famously observes that the number of transistors which can be crammed into a given space (2)__________ every 18 months.
The amount of data that can be stored has grown at a similar rate.
Yet as (3)__________ get smaller, making them gets harder and more expensive.
On May 10th Paul Otellini, the boss of Intel, a big American chipmaker, put the price of a new chip factory at around $10 billion.
Happily for those that lack Intel's resources, there may be a cheaper option—namely to mimic Mother Nature,
who has been building tiny (4)__________, in the form of living cells and their components, for billions of years, and has thus got rather good at it.
A paper published in Small, a nanotechnology journal , sets out the latest example of the (5)__________.
In it, a group of researchers led by Sarah Staniland at the University of Leeds, in Britain, describe using naturally occurring proteins to make arrays of tiny magnets,similar to those employed to store information in disk researchers took their (6)__________ from Magnetospirillum magneticum, a bacterium that is sensitive to the Earth's magnetic field thanks to the presence within its cells of flecks of magnetite, a form of iron oxide.
Previous work has isolated the protein that makes these miniature compasses. Using genetic engineering, the team managed to persuade a different bacterium—Escherichia coli, a ubiquitous critter that is a workhorse of biotechnology—to (7)__________ this protein in bulk.
Next, they imprinted a block of gold with a microscopic chessboard pattern of chemicals.
Half the squares contained anchoring points for the protein.
The other half were left untreated as controls.
They then dipped the gold into a solution containing the protein, allowing it to bind to the treated squares, and dunked the whole lot into a heated (8)__________ of iron salts.
After that, they examined the results with an electron microscope.
Sure enough, groups of magnetite grains had materialised on the treated squares, shepherded into place by the bacterial protein.
In principle, each of these magnetic domains could store the one or the zero of a bit of information, according to how it was polarised.
Getting from there to a real computer memory would be a long road.
For a start, the grains of magnetite are not strong enough magnets to make a useful memory, and the size of each domain is huge by modern computing (9)__________.
But Dr Staniland reckons that, with enough tweaking, both of these objections could be dealt with.
The (10)__________ of this approach is that it might not be so capital-intensive as building a fab.
Growing things does not need as much kit as making the tweaking could be done, therefore, the result might give the word biotechnology a whole new meaning.
new meaning.
A) components B) advantage
C) standards D) compliments
E) essence F) inspiration
G) disadvantage H) doubles
I) solution J) resolution
K) devices L) manufacture
M) spirit N) product
O) technique
答案:1.E)essence2.H)doubles3.A)components4.K)devices5.O)technique
6.F)inspiration7.L)manufacture8.I)solution9.C)standards10.B)advantage
-
2015年6月英语六级考试高频词汇(三)
ic[]a.静的;停滞的n.静电;[-s]静力学2synthetic[sin.θetik]a.合成的,人造的;虚假的ral[:tr.l]a.中立的,不偏不倚的;中性的eval[.i:v.l]a.中世纪的,中古(时代)的ost[’prɑ,’pr..-/’pr.-]n.监管者;院长;教务长;教长nventional[’.n&rs...
-
勤勉英语六级作文500字(通用9篇)
无论是在学校还是在社会中,大家都接触过作文吧,作文是人们把记忆中所存储的有关知识、经验和思想用书面形式表达出来的记叙方式。那么,怎么去写作文呢?以下是小编收集整理的勤勉英语六级作文500字,仅供参考,大家一起来看看吧。勤勉英语六级作文500字篇1itisamatterof...
-
2016下半年英语六级长篇阅读匹配冲刺习题
六级中的阅读部分包括三种题型:选词填空、信息匹配和仔细阅读,分值比重分别为5%,10%,20%。信息匹配较为简单,同学们的得分率相对较高。下面是yjbys网小编提供给大家关于英语六级长篇阅读匹配冲刺习题,希望对大家的.备考有所帮助。SectionBDirections:Inthissection,y...
-
英语六级考试词汇练习精编版
forallpainhelpstomakeusrise,howevermuchwemayhateitatthetime.以下是小编为大家搜索整理的英语六级考试词汇练习精编版,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!epidemic流行性的;流行病equation(数学)等式;相等evoke引起,唤起,引发e...