单项选择题

Hunting for a job late last year, lawyer Gant Redmon stumbled across CareerBuilder, a job database on the Internet. He searched it with no success but was attracted by the site’’ s "personal search agent". It’’s an interactive feature that lets visitors key in job criteria such as location, title, and salary, then E-mails them when a matching position is posted in the database. Redmon chose the keywords legal, intellectual property, and Washington, D. C. Three weeks later, he got his first notification of an opening. "I struck gold," says Redmon, who E-mailed his resume to the employer and won a position as in-house counsel for a company. With thousands of career-related sites on the Internet, finding promising openings can be time- consuming and inefficient. Search agents reduce the need for repeated visits to the databases. But although a search agent worked for Redmon, career experts see drawbacks. Narrowing your criteria, for example, may work against you: "Every time you answer a question you eliminate a possibility," says one expert. For any job search, you should start with a narrow concept what you think you want to do--then broaden it. "None of these programs do that," says another expert. "There’’ s no career counseling implicit in all of this." Instead, the best strategy is to use the agent as a kind of tip service to keep abreast of jobs in a particular database; when you get E-mail, consider it a reminder to check the database again. "I would not rely on agents for finding everything that is added to a database that might interest me," says the author of a job-searching guide. Some sites design their agents to tempt job hunters to return. When CareerSite’’ s agent sends out messages to those who have signed up for its service, for example, it includes only three potential jobs--those it considers the best matches. There may be more matches in the database; job hunters will have to visit the site again to find them--and they do. "On the day after we send our messages, we see a sharp increase in our traffic," says Seth Peets, vice president of marketing for CareerSite. Even those who aren’’ t hunting for jobs may find search agents worthwhile. Some use them to keep a close watch on the demand for their line of work or gather information on compensation to ann themselves when negotiating for a raise. Although happily employed, Redmon maintains his agent at CareerBuilder. "You always keep your eyes open," he says. Working with a personal search agent means having another set of eyes looking out for you. Which of the following can be a disadvantage of search agents

A． Lack of counseling
B．Limited number of visits.
C．Lower efficiency.
D．Fewer successful matches.

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You borrowed some recent issues of U. S. business magazine from your professor a month ago, but delayed returning them. Write a letter of apology to your professor, stating your reasons for the delay and expressing your thanks.Write your letter in no less than 100 words. Write it neatly on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use Li Ming instead. You do not need to write the address. (10 points)

填空题

A large proportion of the studies of behavior used animals as subjects, especially pigeons, rats, and rabbits. There are a number of reasons why researchers in this field frequently choose to conduct their experiments with nonhuman subjects. First of all, the possibility of a placebo effect is minimized with animal subjects. 46)Whereas a human subject’’s behavior may be drastically altered by the knowledge that he or she is being observed, this is unlikely with animal subjects because most studies with animal subjects are conducted in such a way that the animal does not know its behavior is being monitored and recorded. Furthermore, it is unlikely that an animal subject will be motivated either to please or displease the experimenter, a motive that can ruin a study with human subjects. A second reason for using animal subjects is convenience. The species most commonly used as subjects are easy and inexpensive to care for, and animals of a specific age and sex can be obtained in any quantities the experimenter needs. 47)Once animal subjects are obtained, their participation is as regular as the experimenter’’s--animal subjects never fail to show up for their appointments, which is unfortunately not the case with human subjects.48) Probably the biggest advantage of domesticated animal subjects is that their environment can be controlled to a much greater extent than is possible with either wild animals or human subjects. This is especially important in experiments on learning, where previous experience can have a large effect on a subject’’s performance in a new learning situation. Likewise, if a human subject tries to solve some mystery as part of a learning experiment, the experimenter cannot be sure how many similar problems the subject has encountered in his lifetime. 49) When animals are bred and raised in the laboratory, however, their environments can be constructed to make sure that they have no contact with objects or events similar to those they will encounter in the experiment.A final reason for using animal subjects is that of comparative simplicity. 50)Just as a child trying to learn electricity is better off starting with a flashlight than a radio, researchers may have a better chance of discovering the basic principles of learning by examining creatures that are less intelligent and less complex than human beings The assumption here is that although human beings differ from other animals in some respects, they are also similar in some respects, and it is these commonalities that can be investigated with animal subjects.