单选题Bill Clinton — one of the______American presidents gave a speech last week in Oxford University.

单选题Pedants are inclined to made ______ distinctions so they can show off their learning.

单选题If humans use up too much soil—which they have often done and are doing—then they will starve down to the carrying capacity of their habitat. This is nature's "indifferent"

单选题I had hardly sat down ______ he stepped in.

单选题Roy, who was supposed to on a diet, kept making ______ trips to the kitchen to nibbleon this and that, whenever he thought no one would notice.

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The mother is told that her child is desperately ill— the chances of survival are slim, and the treatment is as dreadful as the disease.(2003年春季电子科技大学考博试题)

单选题There's the fear that parents might clone a child to have " spare parts" ______ an organ transplant is needed.

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He used to ______ his parents to help with the expenses. A. count on B. take in C. look into D. get over

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{{B}}Text 3{{/B}} When it comes to the slowing economy, Ellen Spero isn't biting her nails just yet. But the 47-year-old manicurist isn't cutting, filling or polishing as many nails as she'd like to, either. Most of her clients spend $12 to $50 weekly, but last month two longtime customers suddenly stopped showing up. Spero blames the softening economy. "I'm a good economic indicator," she says. "I provide a service that people can do without when they're concerned about saving some dollars. " So Spero is downscaling, shopping at middle-brow Dillard's department store near her suburban Cleveland home, instead of Neiman Marcus. "I don't know if other clients are going to abandon me, too" she says. Even before Alan Greenspan's admission that America's red-hot economy is cooling, lots of working folks had already seen signs of the slowdown themselves. From car dealerships to Gap outlets, sales have been lagging for months as shoppers temper their spending. For retailers, who last year took in 24 percent of their revenue between Thanksgiving and Christmas, the cautious approach is coming at a crucial time. Already, experts say, holiday sales are off 7 percent from last year's pace. But don't sound any alarms just yet. Consumers seem only mildly concerned, not panicked, and many say they remain optimistic about the economy's long-term prospects, even as they do some modest belt-tightening. Consumers say they're not in despair because, despite the dreadful headlines, their own fortunes still feel pretty good. Home prices are holding steady in most regions. In Manhattan, "there's a new gold rush happening in the $4 million to $10 million range, predominantly fed by Wall Street bonuses," says broker Barbara Corcoran. In San Francisco, prices are still rising even as frenzied overbidding quiets. "Instead of 20 to 30 offers, now maybe you only get two or three," says John Tealdi, a Bay Area real-estate broker. And most folks still feel pretty comfortable about their ability to find and keep a job. Many folks see silver linings to this slowdown. Potential home buyers would cheer for lower interest rates. Employers wouldn't mind a little fewer bubbles in the job market. Many consumers seem to have been influenced by stock-market swings, which investors now view as a necessary ingredient to a sustained boom. Diners might see an upside, too. Getting a table at Manhattan's hot new Alain Ducasse restaurant used to be impossible. Not anymore. For that, Greenspan ＆ Co. may still be worth toasting.

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