单选题Historically, a cornerstone of classical empiricism has been the notion that every true ______ must be confirmable by specific observations.

单选题Sino-foreign educational {{U}}program on business{{/U}} is popular in China now, and the demand for {{U}}high level interpretation{{/U}} is great.

单选题There is little learning involved when one is reprimanded two or three months after the deed. A. recommended B. reproached C. recompensed D. reversed

单选题 Smallpox was the first widespread disease to be eliminated by human intervention. A highly contagious viral disease, it was endemic in Europe, causing the death of millions of people until the development of vaccination by Edward Jenner around 1800. In many non- European nations, it remained a dreaded, often fatal illness until very recently. In May 1966, the World Health Organization (WHO), an agency of the United Nations, was authorized to initiate a global campaign to eradicate smallpox. The goal was to eliminate the disease in one decade. At the time, the disease posed a serious {{U}}threat{{/U}} to people in thirty nations. More than 700 physicians, nurses, scientists, and other personnel from WHO joined about 200,000 health workers in the infected nations to battle the disease. Because similar projects for malaria and yellow fever had failed, few believed that smallpox could actually be eradicated, but eleven years after the initial organization of the campaign, no cases were reported in the field. The strategy was not only to provide mass vaccinations but also to isolate patients with active smallpox in order to {{U}}contain{{/U}} the spread of the disease and to break the chain of human transmission. Rewards for reporting smallpox assisted in motivating the public to aid health workers. One by one, each smallpox victim was sought out, removed from contact with others and treated. At the same time, the entire village where the victim had lived was vaccinated. By April 1978, WHO officials announced that {{U}}they{{/U}} had {{U}}isolated{{/U}} the last known case of the disease, but health workers continued to search for new cases for two additional years to be completely sure. In May 1980, a formal statement was made to the global community. Today smallpox is no longer a threat to humanity. Routine vaccinations have been stopped worldwide.

单选题Some children display an unacceptable curiosity about every new thing they encounter.

单选题Although many modifications have been made in it, the game known in the United States as football can be traced directly to the English game of rugby.

单选题When be was told that be scored 58 in the final examination, he was in a comfort of remorse.

单选题According to the recent research of Northeastern University, our ______ sensitivity decreases with age. By age 60, most people have lost 40 percent of ability to smell and 50 percent of their taste buds. A. sensory B. sensitive C. sensible D. senseless

单选题 Questions 81-90 are based on the following passage. It sounds like a science fiction, but researchers say it's a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. {{U}}They{{/U}} might be making people sick, too. The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte- {{U}}literally{{/U}}, "fish killer. " It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding. Seemingly {{U}}prompted{{/U}} by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish's nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them. Whether humans are affected by the dinoflagellate's toxin remains to be seen. Researchers think it's unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation. To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack.

单选题When she returned {{U}}back{{/U}} abroad, Fay M. Zhang told us all about her experience as an illegal immigrant.

单选题What concern will the test-tube baby raise according to the passage?

单选题The doctor took X-rays to ______ the chance of broken bones． A．make sure B．rule out C．break down D．knock out

单选题Due to the fact that universities can not enroll all the candidates, ______ to university is competitive.

单选题The more people you know, the less you have time to see them but you can always reach them on the Internet.

单选题However great the joy with which he welcome a new discovery in some theoretical science of practical application perhaps it was as yet quite impossible to envisage, he experienced quite another kind of joy {{U}}to which{{/U}} {{U}}the discovery invloved{{/U}} immediate revolutionary changes in industry and in historical development in general. A. whose... when the discovery involved B. which... with which the discovery would involve C. for... when the discovery involving D. that... whereas the discovery had to involve

单选题The President of the corporation suggested hold an immediate meeting to disccuss the situation. A. to hold an immediate meeting B. to be holding an immediate meeting C. immediately hold a meeting D. immediately holding a meeting

单选题Some good wives can always get their money's worth. They seldom buy things that they are made to pay through the ______. A. arm B. leg C. nose D. face

单选题It is now clear that no such creatures as vampires have been seen and none been found in the world.

单选题The man had a rather shady occupation and made a lot of money within a short period of time.

单选题The recent findings are also applicable to other areas of design engineering. A. practical B. relevant C. convenient D. comparable