单选题The Salk polio vaccine provides Uimmunity/U from that disease.

单选题 BQuestions 25—27 are based on the following conversation. You now have 15 seconds to read questions 25—27./B

单选题The WTO leaders had been urged some countries to make necessary concession to promote their mutual negotiations.

单选题One of the recurrent frustrations and tragedies in the history of thought is caused by the uncertainty______to solve a given problem by traditional methods previously applied to problems which seem to be of the same nature. A. that is possible B. that it is possible C. whether it is possible D. about what is possible

单选题The two psychologists had to {{U}}modify{{/U}} the American Sign Language somewhat in order to accommodate the chimpanzees' spontaneous gestures.

单选题What is the major problem with using animals as body for growing human organs?

单选题After the music had ______ there was a storm of applause. A. died out B. died hard C. died off D. died away

单选题Mishima became a well-known writer after he had ______.

单选题Breast cancer is second only to skin cancer as the most common malignancy diagnosed in women in the United States. In 2001, about 192,200 new cases of invasive breast cancer were diagnosed and 40,200 women died of the disease. Only lung cancer accounts for more cancer deaths in women. The incidence of breast cancer has increased over the last 20 years. Although some of the increase can be attributed to changes in reproductive patterns, such as delayed childbearing and having fewer children, much of the rise is due to the increased detection of smaller, earlier-stage cancers with the widespread adoption of mammography screening in asymptomatic women. According to data from the Surveillance, Epidemiology, and End Results Program, incidence rates of tumors less than 2.0cm in diameter more than doubled from 1980 to 1987, whereas rates of tumors greater than 3.0cm decreased by 27%. In particular, incidence rates of in situ breast cancer have risen dramatically over the last 25 years. The annual increase in age-adjusted ductal carcinoma in situ incidence rates from 1983 to 1992 was 17.5%. Although the incidence of breast cancer has been increasing, there has been a decline in breast cancer mortality. Death rates decreased 1.6% annually between 1989 and 1995, then 3.4% annually between 1995 and 1998. This improvement in the mortality rate has been attributed to both mammography screening and improvements in breast cancer treatment. Breast cancer has a number of identifiable risk factors. Aside from a personal history of breast cancer, the most important risk factor in women is age. Between 1994 and 1998, 77% of new cases of breast cancer and 84% of breast cancer deaths occurred in women older than 50 years. Other nonmodifiable risk factors include family history, age at birth of the woman"s first child, early menarche, and late menopause. Potentially modifiable risk factors include alcohol consumption, use of postmenopausal hormones, and obesity after menopause. Risk factors and their relative risk are listed in table 1 in order of the strength of their association. Although most breast cancer cases are sporadic, up to 10% are linked to genetic predisposition. Women with a family history of breast cancer, especially in a first-degree relative (ie, mother, sister, or daughter), have an increased risk of breast cancer. In general, a "positive family history" of breast cancer confers a relative risk of 2.0 to 3.0, with the degree of risk varying directly with the closeness of the relationship. Paternal and maternal relatives with breast cancer contribute similarly to the increased risk. Most women with a family history of breast cancer do not have a history striking enough to suggest the presence of an inherited breast cancer syndrome. In many cases, primary care physicians can readily distinguish between families with heritable cancers and those with several sporadic cases. Women at high risk of inherited breast cancers typically have several relatives with breast cancer diagnosed before age 45 to 50 and may also have a family history of bilateral breast cancer, ovarian cancer, or male breast cancer.

单选题"Gangnam Style", the ______ popular song from South Korean recording artist PSY has just become the most watched video on YouTube ever. A. sanely B. insanely C. rationally D. insatiably

单选题Because of various burdens, the 1980s in Ecuador became a decade of______It was made worse by bad floods in 1983, the collapse of world oil prices in 1985 and 1986, and a devastating earthquake in 1987.

单选题The men were ______ to cheat the government by bringing jewels in without paying duty. [A] scheming [B] sufficing [C] scouting [D] subduing

单选题 Who won the World Cup 2004 football game? What happened at the United Nations? How did the critics like the new play? {{U}}(61) {{/U}}an event takes place, newspapers are on the street{{U}} (62) {{/U}}the details wherever anything happens in the world, reporters are on the spot to{{U}} (63) {{/U}}the news. Newspapers have one basic{{U}} (64) {{/U}}to get the news as quickly as possible from its source, from those who make it to those who want to{{U}} (65) {{/U}}it. Radio, television, and{{U}} (66) {{/U}}inventions brought competition for newspapers. So did the development of magazines and other means of communication. {{U}}(67) {{/U}}, the competition merely spurred the newspapers on. They quickly made use of the newer and faster means of communication to improve the{{U}} (68) {{/U}}and thus the effciency of their own operations. Todey more newspapers are{{U}} (69) {{/U}}and read than ever before. Competition also led newspapers to branch out into many other fields. Besides keeping readers{{U}} (70) {{/U}}of the latest news, today's newspapers{{U}} (71) {{/U}}and influence readers about politics and other important and serious matters. Newspapers influence readers' economic choices{{U}} (72) {{/U}}advertising. Most newspapers depend on advertising for their very{{U}} (73) {{/U}}. Newspapers are sold at a price that{{U}} (74) {{/U}}even a small fraction of the cost of production. The main{{U}} (75) {{/U}}of income for most newspapers is commercial advertising. The{{U}} (76) {{/U}}in selling advertising depends on newspaper's value to advertisers. This{{U}} (77) {{/U}}in terms of circulation. How many people read the newspaper? Circulation depends{{U}} (78) {{/U}}on the work of the circulation department and on the services or entertainment{{U}} (79) {{/U}}in a newspaper's pages. But for the most part, circulation depends on a newspaper's value to readers as a source of information{{U}} (80) {{/U}}the community, city, county, nation and world—and even outer space.

单选题It is only when you watch A(the dense mass) of thousands of ants, B(crowded together) around the Hill, C(that)you begin to see the whole beast, and now you observe it D( to think, plan, calculate.)

单选题If we say something is ______ , we mean that we find it extremely pleasant or enjoyable. A. gracious B. gloomy C. gigantic D. gorgeous

单选题______ for your advice, I would have been taken in.

单选题Jane was hit on the head by a robber and was knocked______.

单选题Since the package was ______, the damage was paid for. A. ensured B. insured C. assured D. promised

单选题By bare feet, we recognize God, the angels, Jesus Christ and the apostles, but for an artist to have depicted the Virgin Mary with bare feet ______ heresy. A. were tantamount with B. has been tantamount with C. would have been tantamount to D. would be tantamount to