选词填空专项练习
【选词填空1】
Two astronauts face a not-so-merry Christmas after being told to ration their food and hope a cargo ship with extra supplies docks on Dec. 21. Russian cosmonaut Salizhan Sharipov and American Leroy Chiao have been asked to cut out calories equal to three cans of Coke from their daily diet—around 10 percent of their daily 1 and an amount that would be little noticed, NASA said.
Russian officials, quoted in the local media, have 2 blamed the previous crew for overeating during their one-month mission earlier this year, leaving a 3 of meat and milk and a surplus of juice and confectionery (糖果).
The Dec. 24 launch of the next Progress is now 4 for the crew, stationed in orbit since October. It is due to 5 with the ISS on Dec. 21.
NASA officials said their situation was not so different from being cut off on Earth, and their l
ives were not at risk. If they do not receive 6 supplies, the astronauts would have to 7 the station and return to Earth on the Soyuz capsule that is docked there.
Russia has been the sole lifeline to the ISS for almost two years when the United States grounded its 8 fleet after the fatal Columbia accident.
Russia has often 9 of its financial struggle to keep the ISS fully serviced single-handedly. Shuttle flights could 10 in May, officials have said, but in the meantime Russia will continue to launch all manned and cargo ships.
A) deficit I) adequate
B) complained J) dock
C) severely K) resume
D) allowance L) vital
E) considerately M) trivial
F) shuttle N) evaluate
G) evacuate六级新题型 O) fresh H) absently
【选词填空2】
What is it about Americans and food? We love to eat, but we feel 1 about it afterward. We say we want only the best, but we strangely enjoy junk food. We‘reface an unprecedented epidemic of obesity(肥胖矛盾情结) lies in our history. The first Europeans came to this continent searching for new spices but went in vain. The first cash crop(经济作物) wasn‘t eaten but smoked. Then there was Prohibition, The immigrant experience, too, has been one of inharmony. Do as Romans do means eating what ―real Americans‖ eat, but our nation‘s food has come to be—pizza, say, or hot dogs. And some of the country‘s most treasured cooking comes from people who arrived here in shackles.
Perhaps it should come as no surprise then that food has been a medium for the nation‘s defining struggles, whether at the Boston Tea Party or the sit槠渀猀 at southern lun
ch counters. It is integral to our concepts of health and even morality whether one refrains from alcohol for But strong opinions have not brought 7 . Americans are ambivalent about what they put in their mouths. We have of our foods, especially as we learn more about what they contain.
The 9 in food is still prosperous in the American consciousness. It‘s no coincidence, then, that the first Thanksgiving holds the American imagination in such bondage(束缚). It‘s what we eat—and how with friends, family, and strangers—that help define America as a community today.
A. answer I. creative
B. result J. belief
C. share K. suspicious
D. guilty L. certainty
E. constant M. obsessed
F. defined N. identify
G. vanish H. adapted O. ideals
【选词填空3】
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. Moore'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 chip-maker, 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 o
f 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 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 magnet
ic 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.
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