单选题Millions of Americans flock to their drugstores to buy vitamins and minerals, ______ that these pills can help to prevent serious illnesses.

单选题中国著名的芭蕾舞表演艺术家( )被称为中国的第一只“白天鹅”。

单选题The winter vacation ______ over, he got down to his work again. A. was B. were C. had been D. being

单选题Dow Jones News is important because ______.

单选题All things ______, the planned trip will have to be called off. A. considered B. be considered C. considering D. having considered

单选题A: This is one of a pair, isn't it? B: Yes, madam. A. Well, can I see the other one, please? B: ______ A. Certainly, madam, here it is. B. Fancy meeting you here. C. That's right, but you are late. D. How can I help you?

单选题______ in the United States, St. Louis has now become the 24th largest city. A. Being the fourth biggest city B. It was once the fourth biggest city C. Once the fourth biggest city D. The fourth biggest city it was

单选题Passage Four Science is an enterprise concerned with gaining information about causality, or the relationship between cause and effect. A simple example of a cause is the movement of a paddle as it strikes a ping-pong ball; the effect is the movement of the ball through the air. In psychology and other sciences, the word "cause" is often replaced by the term "independent variable". This term implies that the experimenter is often "free" to vary the independent variable as he or she desires (for example, the experimenter can control the speed of the paddle as it strikes the ball). The term "dependent variable" replaces the word "effect", and this term is used because the effect depends on some characteristic of the independent variable (the flight of the ball depends on the speed of the paddle). The conventions of science demand that both the independent and dependent variables be observable events, as is the case in the ping-pong example. In the case of biorhythm theory, the independent variable is the number of days that have elapsed between a person's date of birth and some test day. The dependent variable is the person's level of performance on some specified task on the test day. Notice that although the experimenter is not free to choose a birthday for a given individual, persons with different dates of birth can be tested on the same day, or a single subject can be tested on several different days. In order to predict the relationship between independent and dependent variables, many scientific theories make use of what are called intervening variables. Intervening variables are purely theoretical concepts that cannot be observed directly. To predict the flight of a ping-pong ball, Newtonian physics relies on a number of intervening variables, including force, mass, air resistance, and gravity. You can probably anticipate that the intervening variables of biorhythm theory are the three bodily cycles with their specified time periods. It should be emphasized that not all psychological theories include intervening variables, and some psychologists object to their use precisely because they are not directly observable. The final major component of a scientific theory is its syntax, or the rules and definitions that state how the independent and dependent variables are to be measured, and that specify the relationships among independent variables, intervening variables, and dependent variables. It is the syntax of biorhythm theory that describes how to use a person's birthday to calculate the current status of the three cycles. The syntax also relates the cycles to the dependent variable, performance, by stating that positive cycles should cause high levels of performance whereas low or critical cycles should cause low performance levels. To summarize, the components of a scientific theory can be divided into four major categories: independent variables, dependent variables, intervening variables, and syntax.

单选题Cathleen: Let's take a coffee break, shall we? Yolanda: ______but I can't. A. We shall B. Yes, let's C. You will D. I wish I could

单选题Patient: I strained my back the other day working in the garden. Doctor: ______ A. Why so careless? B. Well, you need an X-ray. C. When did it start? D. Well, go and stay in bed.

单选题At the end of the discussion, he Usummed up/U and added a few points.

单选题The two passengers ______ the crash and were given emergency treatment at the scene of the crash.

单选题Speaker A: I'm so worried about this job interview. speaker B: Don't worry. ______.

单选题When Mr. Green retired his son ______ the business from him.

单选题The Supreme Court's decisions on physician-assisted suicide carry important implications for how medicine seeks to relieve dying patients of pain and suffering. Although it ruled that there is no constitutional right to physician-assisted suicide, the Court in effect supported the medical principle of "double effect," a centuries-old moral principle holding that an action having two effects--a good one that is intended and a harmful one that is foreseen--is permissible if the actor intends only the good effect. Doctors have used that principle in recent years to justify using high doses of morphine to control terminally ill patients' pain, even though increasing dosages will eventually kill the patient. Nancy Dubler, director of Montefiore Medical Center, contends that the principle will shield doctors who "until now have very, very strongly insisted that they could not give patients sufficient medication to control their pain if that might hasten death." George Annas, chair of the health law department at Boston University, maintains that, as long as a doctor prescribes a drug for a legitimate medical purpose, the doctor has done nothing illegal even if the patient uses the drug to hasten death. "It's like surgery," he says. "We don't call those deaths homicides because the doctors didn't intend to kill their patients, although they risked their death. If you're a physician, you can risk your patient's suicide as long as you don't intend their suicide." On another level, many in the medical community acknowledge that the assisted-suicide debate has been fueled in part by the despair of patients for whom modern medicine has prolonged the physical agony of dying. Just three weeks before the Court's ruling on physician-assisted suicide, the National Academy of Science (NAS) released a two-volume report, Approaching Death: Improving Care at the End of Life. It identifies the undertreatment of pain and the aggressive use of "ineffectual and forced medical procedures that may prolong and even dishonor the period of dying" as the twin problems of end-of-life care. The profession is taking steps to require young doctors to train in hospices, to test knowledge of aggressive pain management therapies, to develop a Medicare billing code for hospital-based care, and to develop new standards for assessing and treating pain at the end of life. Annas says lawyers can play a key role in insisting that these well-meaning medical initiatives translate into better care. "Large numbers of physicians seem unconcerned with the pain their patients are needlessly and predictably suffering," to the extent that it constitutes "systematic patient abuse." He says medical licensing boards "must make it clear...that painful deaths are presumptively ones that are incompetently managed and should result in license suspension./

单选题{{B}}Text 1{{/B}} Office jobs are among the positions hardest hit by compumation. Word processors and typists will lose about 93,000 jobs over the next few years, while 57,000 secretarial jobs will vanish. Blame the PC Today, many executives type their own memos and carry their "secretaries" in the palms of their hands. Time is also hard for stock clerks, whose ranks are expected to decrease by 68,000. And employees in manufacturing firms and wholesalers are being replaced with computerized systems. But not everyone who loses a job will end up in the unemployment line. Many will shift to growing positions within their own companies. When new technologies shook up the telecomm business, telephone operator Judy Dougherty pursued retraining. She is now a communications technician, earning about $64,000 per year. Of course, if you've been a tollbooth collector for the past 30 years, and you find yourself replaced by an E-ZPass machine, it may be of little consolation(安慰) to know that the telecomm field is booming. And that's just it: The service economy is fading; welcome to the expertise economy. To succeed in the new job market, you must be able to handle complex problems. Indeed, all but one of the 50 highest-paying occupations-air-traffic controller-demand at least a bachelor's degree. For those with just a high school diploma, it's going to get tougher to find a well-paying job. Since fewer factory and clerical jobs will be available, what's left will be the jobs that compumation can't kill: Computers can't clean offices, or care for Alzheimer's patients(老年痴呆病人). But, since most people have the skills to fill those positions, the wages stay painfully low, meaning compumation could drive an even deeper wedge(楔子) between the rich and poor. The best advice now: Never stop learning, and keep up with new technology. For busy adults, of course, that can be tough. The good news is that the very technology that's reducing so many jobs is also making it easier to go back to school—without having to sit in a classroom. So-called Internet distance learning is hot, with more than three million students currently enrolled, and it's gaining credibility with employers. Are you at risk of losing your job to a computer? Check the federal Bureau of Labor Statistics' Occupational Outlook Handbook, which is available online at bls.gov.

单选题The young man dreamed that a rich relative would die and leave him a Ulegacy/U.

单选题Birds (whose) coloring blends in with the leaves (do not) seen (as easily as) (those) with brighter feathers.