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英語六級(jí)考試選詞填空專項(xiàng)練習(xí)題
在平平淡淡的日常中，我們都可能會(huì)接觸到練習(xí)題，通過這些形形色色的習(xí)題，使得我們得以有機(jī)會(huì)認(rèn)識(shí)事物的方方面面，認(rèn)識(shí)概括化圖式多樣化的具體變式，從而使我們對(duì)原理和規(guī)律的認(rèn)識(shí)更加的深入。一份好的習(xí)題都具備什么特點(diǎn)呢？以下是小編整理的英語六級(jí)考試選詞填空專項(xiàng)練習(xí)題，僅供參考，歡迎大家閱讀。
英語六級(jí)考試選詞填空專項(xiàng)練習(xí)題 1
Directions: In this section, there is apassage with ten blanks. You are required to select one word for each blankfrom a list of choices given in a word bank following the passage. Read thepassage through carefully before making your choices. Each choice in the bankis identified by a letter. Please mark the corresponding letter for each itemon Answer Sheet 2 with a single line through the centre. You may not use any ofthe words in the bank more than once.
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 less.
Moores 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 Intels 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 drives.
The researchers took their (6)__________ from Magnetospirillum magneticum, a bacterium that is sensitive to the Earths 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 them.
If the tweaking could be done, therefore, the result might give the word biotechnology a whole 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)essence
2.H)doubles
3.A)components
4.K)devices
5.O)technique
6.F)inspiration
7.L)manufacture
8.I)solution
9.C)standards
10.B)advantage
英語六級(jí)考試選詞填空專項(xiàng)練習(xí)題 2
ALTHOUGH he is still (1)__________ things up at Dell, an ailing computer-maker, Carl Icahn has found time to tilt at another tech titan. On August 13th the veteran shareholder activist (2) __________that he had built up a stake in Apple, though he stayed mum about exactly how many shares he had bought. Mr Icahn’s intentions, however, are crystal clear: he wants the consumer-electronics behemoth to expand plans to return some of its whopping $147 billion of cash and marketable securities to shareholders.
Mr Icahn is also after more money at Dell, where he has been lobbying with allies against a (3)__________ buy-out plan put forward by Michael Dell, the firm’s founder, and Silver Lake, a private-equity firm. His pressing has already forced the buy-out group to raise its initial offer by over $350m, to $24.8 billion and he has taken his (4)__________ to the courts in a bid to extract an even higher price.
Other tech firms have been attracting the attention of activist investors too. Earlier this year ValueAct Capital, an investment fund, said it had built up a $2 billion stake in Microsoft. Jaguar Financial, a Canadian bank, has been (5)__________ fresh thinking at troubled BlackBerry, which announced on August 12th that it is exploring various (6) __________options, including alliances and a possible sale. And Elliott Management, a hedge fund, has been lobbying for change at NetApp, a data-storage firm that it thinks could do more to improve returns to (7)__________.
One reason tech firms have found themselves in activists’ crosshairs is that, like Apple, some built up big cash piles during the economic downturn and have been slow to use the money. Financiers hope to get them to loosen their purse-strings faster and to pocket some of the cash. Mr Icahn wants Apple to increase and (8)__________ a share buy-back programme that is currently set to return $60 billion to shareholders by the end of 2015.
Another reason that tech firms make tempting targets for shareholder activists is that swift changes in technologies can trip up even the mightiest. Witness the case of Microsoft, which ruled the roost during the personal-computer era but has struggled to adapt to a world in which tablets and smartphones are all the rage. Investors hope to mint money by pushing companies to change more rapidly in response to such upheavals in their markets.
The rewards can be substantial. Egged on by Third Point, an activist hedge fund, Yahoo (9) __________Marissa Mayer as its new chief executive in July 2012. By the time she celebrated a year in the job last month, the troubled web giant’s share price had risen by over 70%. In July the hedge fund sold a big chunk of shares back to Yahoo. Mr Icahn thinks Apple’s share price, which closed at $499 on August 14th, could soar too if the firm follows his advice on buy-backs. He tweeted this week that he had had a “nice (10)__________” with Tim Cook, Apple’s boss, about his idea, though he did not say what Mr Cook thought of it. If Apple drags its feet, expect things to turn nasty.
A) shareholders
B) strategic
C) communication
D) battle
E) conversation
F) encouraging
G) exciting
H) stirring
I) appointed
J) race
K) revealed
L) method
M) accelerate
N) proposed
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