单选题At midnight, we were Uaroused/U by a knock at the door.

单选题Skin Cancer Melanoma (黑素瘤), the deadliest kind of skin cancer, is now the most common cancer in (51) British women, the country's leading cancer organization said Wednesday. Skin cancer has (52) cervical (子宫颈的) cancer as the top cancer striking women in their 20s, according to the latest data from Cancer Research United Kingdom. The trend is particularly (53) since younger people are not generally those most susceptible (易患的) to melanoma. Rates of skin cancer are (54) highest in people over age 75. But experts worry that increasing numbers of younger people being diagnosed with skin cancer could be the (55) of a dangerous trend. Women in their 20s make (56) a small percentage of all patients diagnosed with melanoma in Britain, but nearly a third of all cases occur in people younger than 50. Based on current numbers, Cancer Research UK predicts that melanoma will become the fourth (57) common cancer for men and women of all ages by 2024, and that cases will jump from about 9,000 cases a year to more than 15,500. Cancer experts (58) the rising number of skin cancer cases largely to the surge in people using tanning salons. "Spending time on sun beds is just as (59) as staying out too long in the sun," said Caroline Cerny of Cancer Research UK. The organization is starting a SunSmart (60) to warn Britons of the dangers of being too bronzed. "The intensity of ultraviolet rays in some sun beds can be more than 10 (61) stronger than the midday sun," Cerny said. In the United States, several states require parental approval (62) minors can use tanning salons. Wisconsin bans people 16 and (63) from using tanning beds, and others ban children under 14. At least 29 states have regulations governing minors' use of tanning salons. In the U. K. , Scottish politicians passed legislation banning those under 18 from using tanning beds, though it hasn't yet been implemented. There are no plans for (64) in the rest of the U. K. The World Health Organization has previously recommended that tanning beds be regulated because of their potential to damage DNA in the skin. Experts said most deadly skin cancers could be (65) if people took the proper precautions when in the sun and avoided tanning beds.

单选题This kind of animal became {{U}}extinct{{/U}} about 500 years ago.

单选题In Britain and many other countries, {{U}}appraisal{{/U}} is now a tool of management. A. evaluation B. production C. efficiency D. publicity

单选题His kidney was given to his daughter so as to save her life.A. transformedB. transportedC. transmittedD. transplanted

单选题Please {{U}}ensure{{/U}} that your seatbelts are fastened while driving.

单选题By investing wisely she accumulated a fortune.

单选题The police managed to {{U}}track down{{/U}} the man in New York.

单选题Enamel,the hardest substance in a human being's body,covers the entire crown of the tooth.

单选题Beyond the Pap Scientists have known for some time that virtually all cases of cervical cancer are triggered by a family of viruses called human papillomavirus, or HPV. Most women who become infected with HPV are able to shake off the virus and suffer no apparent long-term consequences to their health. But a few women develop a persistent infection that can, for reasons that are not entirely clear, eventually lead to cancerous changes in the cervix. Now researchers at the Digene Corp. of Beltsville, Maryland, have developed a test that detects an active HPV infection by looking for its genetic byproducts in the vagina. The HPV test was better than the standard Pap test at finding cervical cancer at any stage, according to two studies published this month in the Journal of the American Medical Association. So far, so good. Unfortunately, the test's false-positive rate — how often it indicated that there was a problem when none existed — was almost twice as high as that for the Pap smear. In these cases, a biopsy of the woman's cervix showed no sign of disease. And that's the crux of the problem. How many women should undergo what is, when it comes right down to it, unnecessary treatment to find a few more cases of cervical cancer? Shouldn't health officials focus instead on making sure that more women undergo regular Pap-smear examinations? After all, Pap smears, though far from perfect, have helped dramatically lower the death toll from cervical cancer, taking it from the No. 1 cause of death due to cancer in American women to the 10th. Complicating matters is the fact that HPV is a very common infection. In some parts of the US as many as half of all women under age 35 have an active case. Yet 99 out of 100 women who are HPV-positive will never get cervical cancer, estimates Dr. Joanna Cain, vice president of the American College of Obstetricians and Gynecologists. "If those 99 women live their lives as if they're going to develop cancer, " she says, "we're not necessarily doing them any good. " At present, the HPV test is approved in the US only to help resolve ambiguous results from a Pap-smear test. Many gynecologists believe that HPV will eventually replace the pap. But they're not willing to abandon it without a lot more detailed information and neither should you.

单选题Migrant Workers In the past twenty years, there has been an increasing tendency for workers to move from one country to another. 1 some newly independent countries have understandably restricted most jobs to local people, others have attracted and welcomed migrant workers. This is particularly the case in the Middle East, 2 increased oil incomes have enabled many countries to 3 outsiders to improve local facilities. 4 the Middle East has attracted oil-workers from the USA and Europe. It has brought in construction workers and technicians from many countries, 5 South Korea and Japan. In view of the difficult living and working conditions in the Middle East, it is not 6 that the pay is high to attract suitable workers. Many engineers and technicians can earn at least 7 money in the Middle East as they can in their own country, and this is a major attraction. An allied benefit is the low taxation or complete lack of it. This increases the net amount of pay received by visiting workers and is very popular with them. Sometimes a disadvantage has a compensating advantage. 8 , the difficult living conditions often lead to increased friendship when workers have to depend on each other 9 safety and comfort. 10 , many migrant workers can save large sums of money partly 11 the lack of entertainment facilities. The work is often complex and full of problems but this merely presents greater challenge to engineers who prefer to find solutions 12 problems rather than do routine work in their home country. One major problem which 13 migrant workers in the Middle East is that their jobs are temporary ones. They are nearly always on contract, so it is not easy for them to plan ahead with great confidence. This is to be expected since no country welcomes a large number of foreign workers as permanent residents. 14 , migrant workers accept this disadvantage, along with others, because of the 15 financial benefits which they receive.

单选题A series of rifle shots disturbed the {{U}}tranquility{{/U}} of the camp grounds. A. solidarity B. peacefulness C. equanimity D. propinquity

单选题He lacked the strength to deal with all these problems.A. think ofB. talk aboutC. copy downD. cope with

单选题Yesterday, I encountered one of my old friends on the street by chance.A. incidentallyB. eventuallyC. temporarilyD. accidentally

单选题We cannot permit such conduct .

单选题Over six million citizens of the United States benefit from private pension plans each year.A. unauthorizedB. confidentialC. nontransferableD. non-governmental

单选题Not all member states abided by the principle they had agreed on previously.

单选题Michael is now merely a good friend.

单选题Police have still found no clues as to the whereabouts of the missing child.A. reasonsB. signsC. answersD. marks

单选题Researchers say at least four patients have died after liposuction in New York and one in another US city, raising questions about the safety of the nation's most popular type of cosmetic surgery. Until now, there have been occasional news stories of patients dying after liposuction, in which unwanted body fat is vacuumed out. But a report in yesterday's issue of the New England Journal of Medicine is the first detailed account in a medical journal. Doctors reviewing six years of autopsy records in New York City found four patients who had died after liposuction. At least how many patients have died after liposuction in the US?A. FourB. FiveC. SixD. Nine