单选题{{B}}Text 3{{/B}} The "MyDoom" virus could presage a generation of computer attacks by organised gangs aiming to extract ransoms from online businesses, experts said yesterday. The warning came as the website run by SCO, a company that sells Unix computer software, in effect disappeared from the web under a blizzard of automated attacks from PCs infected by the virus, which first appeared a week ago. The "MyDoom-A" version of the virus is reckoned to be the worst to have hit the internet, in terms of the speed of its spread, with millions of PCs worldwide believed to be infected. Such "zombie" machines begin to send out hundreds of copies of the virus every hour to almost any e-mail address in their files. On Sunday they began sending automated queries to SCO's website, an attack that will continue until 12 February. The attack is the web equivalent of ringing the company's doorbell and running away a million times a second, leaving its computers unable to deal with standard requests to view its pages. "You have to wonder about the time limit," said Graham Cluley, senior technology consultant at the antivirus company Sophos. "Someone could go to SCO after the 12th and say, 'If you don't want this to happen again, here are our demands'." Raimund Genes, European president of the security software firm Trend Micro, said: "Such a programme could take out any major website on the internet. It's not terrorism, but it is somebody who is obviously upset with SCO" SCO has earned the enmity of computer users through a lawsuit it has filed against IBM. SCO claims ownership of computer code it says IBM put into the free operating system Linux, and is demanding licence fees and damages of $1bn. Mr. Cluley said: "It might be that whoever is behind this will say to SCO, 'if you don't want the next one to target you, drop the lawsuit'." SCO has offered $250,000 (￡140,000) for information leading to the arrest of the person or people who wrote and distributed MyDoom. Nell Barrett, of the security company Information Risk Management, said, "I would give a lot of credence to the idea of gangs using viruses to extort money. It's hard for law enforcement to track them down, because they're using machines owned by innocent people." A second variant of MyDoom will start attacking part of Microsoft's website later today. The antivirus company MessageLabs said it had blocked more than 16 million copies of the virus in transit over the net so far. But millions more will have reached their targets.

单选题Losing the job was bad, but even worse was the feeling that I had ____ my dear wife and children.

单选题It's a pity that some of the people cannot come to the party. A. inviting B. invited C. to invite D. were invited

单选题Point out which item does not fall under the same category as the rest, and explain the reason in ONE sentence. (南京大学2007研)

单选题Not one of all the purple hostWho took the flag to-day Can tell the definition, So clear, of victory! As he, defeated, dying, On whose forbidden earThe distant strains of triumph Burst agonized and clear!The first line of the following poem is______.

单选题If x is a positive number and 1/2 the square root of x is the cube root of x, then x= A. 64 B. 32 C. 16 D. 4 E. 1

单选题I ______ asleep because it took me a long time to realize that the telephone was ringing.A. could have fallenB. should have fallenC. must have fallenD. mustn't have fallen

单选题They all ______ mentioning that girl.

单选题On a ______ memory system, the logical memory space available to the program is totally independent of the physical memory space. A．cache B．virtual C．RAM D．ROM

单选题In order to ______ our business to your country, we are writing to you to ______ possibilities of cooperation. A．expand, leek B．extend, leek C．extend, seek D．expand, seek

单选题It can be inferred from the passage that the author most probably believes which of the following to be true concerning those historians who study the history of women?

单选题He showed great interest in my field of work. He asked me ______ fresh developments. A. informing him of B. to inform him C. to keep him informed of D. keeping him informed of

单选题Any student having a ______ interest in sports can apply for membership in the club.

单选题During the past generation, the American middle-class family that once could count on hard work and fair play to keep itself financially secure had been transformed by economic risk and new realties. Now a pink slip, a bad diagnosis, or a disappearing spouse can reduce a family from solidly middle class to newly poor in a few months. In just one generation, millions of mothers have gone to work, transforming basic family economics. Scholars, policymakers, and critics of all stripes have debated the social implications of these changes, but few have looked at the side effect: family risk has risen as well. Today's families have budgeted to the limits of theirs new two-paycheck status. As a result, they have lost the parachuted they once had in times of financial setback—a back-up earner (usually Mom) who could go into the workforce if the primary earner got laid off or fell sick. This "added-worker effect" could support the safety net offered by unemployment insurance or disability insurance to help families weather bad times. But today, a disruption to family fortunes can no longer be made up with extra income from an otherwise-stay-at-home partner. During the same period, families have been asked to absorb much more risk in their retirement income. Steelworkers, airline employees, and now those in the auto industry are joining millions of families who must worry about interest rates, stock market fluctuation, and the harsh reality that they may outlive their retirement money. For much of the past year, President Bush campaigned to move Social Security to a saving-ac- count model, with retirees trading much or all of their guaranteed payments for payments depending on in- vestment returns. For younger families the picture is not any better. Both the absolute cost of healthcare and the share of it borne by families have risen—and newly fashionable health-saving plans are spreading from legislative halls to Wal-Mart workers, with much higher deductibles and a large new dose of investment risk for families' future healthcare. Even demographics are working against the middle class family, as the odds of having a weak elderly parent-and all the attendant need for physical and financial assistance—have jumped eightfold in just one generation. From the middle-class family perspective, much of this, understandably, looks far less like an opportunity to exercise more financial responsibility, and a good deal more like a frightening acceleration of the whole- sale shift of financial risk onto their already overburdened shoulders. The financial fallout has begun, and the political fallout may not be far behind.

单选题______, the distinction between creators and users of corporate television is blurring.

单选题Though she isn"t British by birth, she is a British citizen by ______ of her marriage to an Englishman.

单选题Australia is struggling to cope with the consequences of a devastating drought. As the world warms up, other countries should pay______.(北京大学2009年试题)

单选题The word elude in the second paragraph probably means ______. A．help B．tell C．confuse D．answer

单选题Much of the language used to describe monetary policy,such as"steering the economy to a soft landing"or"a touch on the brakes"．makes it sound like a precise science．Nothing could be further from the truth．The link between interest rates and inflation is uncertain．And there are long, variable lags before policy changes have any effect on the economy．Hence the analogy that likens the conduct of monetary policy to driving a car with a blackened windscreen, a cracked rear view mirror and a faulty steering wheel． Given all these disadvantages．central bankers seem to have had much to boast about of late． Average inflation in the big seven industrial economies fell to a mere 2.3%last year, close to its lowest level in 30 years．before rising slightly to 2.5%this July．This is a long way below the double digit rates which many countries experienced in the 1970s and early 1980s． It is also less than most forecasters had predicated．In late 1994 the panel of economists which The Economist polls each month said that America's inflation rate would average 3.5%in 1995．In 1995, in fact, it fell to 2.6%in August, and expected to average only about 3%for the year as a whole．In Britain and Japan inflation is running half a percentage point below the rate predicted at the end of last year．This is no flash in the pan；over the past couple of years, inflation has been consistently lower than expected in Britain and America． Economists have been particularly surprised by favorable inflation figures in Britain and the United States, since conventional measures suggest that both economies, and especially America's, have little productive slack．America's capacity utilization, for example, hit historically high levels earlier this year,and its jobless rate(5.6%in August)has fallen below most estimates of the natural rate of unemployment—the rate below which inflation has taken off in the past． Why has inflation proved so mild? The most thrilling explanation is, unfortunately,a little defective．Some economists argue that powerful structural changes in the world have up—ended the old economic models that were based upon the historical link between growth and inflation．

单选题According to the context, the word "effluents" in Para. 1 is closest in meaning to