单选题I came across one of my former classmates the other day while shopping.A. metB. greetedC. missedD. contacted

单选题France has kept intimate links with its former African territories.

单选题After-birth Depression Blamed for Woman's Suicide A. new mother apparently suffering from postpartum mental illness fell to her death from a narrow 12th-floor ledge of a Chicago hotel, eluding the lunging grasp of firemen called to help. The Chicago Tribune reported Tuesday that the mother of a 3-month-old daughter, Melanie Stokes, 41, was said to be suffering from a severe form of after-birth depression called postpartum psychosis, an extremely rare biological response to rapidly changing hormonal levels that can result in hallucinations, delusions, severe insomnia and a drastic departure from reality. "That was a monster in my daughter's brain, " said Stokes' mother, Carol Blocker. "The medicine took no effect at all, while her grief was so strong that nothing could make up for it. I'm just glad she didn't take her daughter with her. " Virtually all new mothers get postpartum blues, also called the "baby blues". which are brief episodes of irritability, moodiness and weepiness. About 20 per cent of birthing women experience postpartum depression, which can be triggered by hormonal changes, sleeplessness and the pressures of being a new mother. It is often temporary and highly treatable. But The Tribune said what scientists suspect Stokes was battling, postpartum psychosis, is even more extreme and is considered a psychiatric emergency. During postpartum psychosis — a very real disorder that affects less than I percent of women, according to the National Institute of Mental Health — a mother might hear voices, have visions, feel extremely agitated and be at risk of harming the child or herself. Often the consequences are tragic. In 1987, Sheryl Masip of California told a judge that postpartum psychosis made her drive a Volvo over her 6-week-old son. Latrena Pixley of Washington, D. C. , said the disorder was why she smothered her 6-week-old daughter in 1992. And last year, Judy Kirby, a 31-year-old Indianapolis mother allegedly suffering from postpartum psychosis, sped into oncoming traffic and plowed into a minivan, killing seven youngsters. including three of her own.

单选题The success of the technique depends on_____

单选题He lacked the strength to deal with all these problems.

单选题 IQ-gene In the angry debate over how much of IQ comes from the genes that children inherit from parents and how much comes from experiences, one little fact gets overlooked: no one has identified any genes (other than those that cause retardation) that affect intelligence. So researchers led by Robert Plomin of London's Institute of Psychiatry decided to look for some. They figured that if you want to find a "smart gene", you should look in smart kids. They therefore examined the DNA of students like those who are so bright that they take college entrance exams four years early—and still score at Princeton-caliber levels. The scientists found what they sought. "We have," says Plomin, "the first specific gene ever associated with general intelligence." Plomin's colleagues drew blood from two groups of 51 children each, all 6 to 15 years old and living in six counties around Cleveland. In one group, the average IQ is 103. All the children are white. Isolating the blood cells, the researchers then examined each child's chromosome 6. Of the 37 landmarks on chromosome 6 that the researchers looked for, one jumped out: a form of gene called IGF2R occurred in twice as many children in the high-IQ group as in the average group—32 percent versus 16 percent. The study, in the May issue of the journal Psychological Science, concludes that it is this form of the IGF2R gene that contributes to intelligence. Some geneticists see major problems with the IQ-gene study. One is the possibility that Plomin's group fell for "chopsticks fallacy". Geneticists might think they've found a gene for chopsticks flexibility, but all they've really found is a gene more common in Asians than, say, Africans. Similarly, Plomin's IQ gene might simply be one that is more common in groups that emphasize academic achievement. "What is the gene that they've found reflects ethnicity?" asks geneticist Andrew Feinberg of Johns Hopkins University. "That alone might explain the link to intelligence, since IQ tests are known for being culturally sensitive and affected by a child's environment." And Neil Risch of Standford University points out that if you look for 37 genes on a chromosome, as the researchers did, and find that one is more common in smarter kids, that might reflect pure chance rather than a causal link between the gene and intelligence. Warns Feinberg: "I would take these findings with a whole box of salt."

单选题The washing- machine can operate by itself.A. personallyB. automaticallyC. manuallyD. quickly

单选题The food is inadequate for ten people.

单选题Mary evidently is the most Udiligent/U student among us.

单选题All the children came through the cave {{U}}safe and sound. {{/U}}

单选题Sleeping for less than 5 hours each night is better than sleeping for 5 hours.

单选题The climate and soil as far north as the Arctic Circle permit farmers to raise livestock and grow barley, potatoes and other crops.

单选题Marsha confessed that she knew nothing of computer.A. reportedB. hopedC. answeredD. admitted

单选题He replied that this was absolutely impossible.

单选题The river widens considerably as it begins to turn west.

单选题The union representative put across her argument very effectively.

单选题The union representative {{U}}put across{{/U}} her argument very effectively. A. explained B. invented C. considered D. accepted

单选题Right and Wrong Suppose you work in a library, checking people's books as they leave, and a friend asks you to let him steal a hard-to-find reference book that he wants to own. You might hesitate to agree for various reasons. You might be afraid that he'll be caught, and that both you and he will then get into trouble. You might want the book to stay in the library so that you can read it yourself. But you may also think that what he proposes is wrong--that he shouldn't do it and you shouldn't help him. If you think that, what does it mean and what, if anything, makes it true? To say it's wrong is not just to say it's against the rules. There can be bad rules which stop what isn't wrong--like a company rule against criticizing the boss. A rule can also be bad because it requires something that is wrong--like a law that looks down upon black people in hotels and restaurants. The ideas of wrong and right are different from the ideas of what is and is not against the rules. If you think it would be wrong to help your friend steal the book, then you will feel uncomfortable about doing it: in some way you won't want to do it, even if you are also unwilling to refuse to help a friend. Where does the desire not to do it come from? What is its motive behind it? There are various ways in which something can be wrong, but in this case, if you had to explain it, you'd probably say that it would be unfair to other users of the library. They may be just as interested in the book as your friend is, but read it in the reference room, where anyone who needs it can fred it. These thoughts have to deal with effects on others--not necessarily effects on their feelings, since they may never find out about it, but some kind of damage. In general, the thought that something is wrong depends on its impact not just on the person who does it but on other people.

单选题He replied that this was absolutely impossible.A. statedB. saidC. answeredD. claimed

单选题It is understandable that early civilizations blamed storms on the gods.A. bad weatherB. unsuccessful harvestsC. illnessD. warfare