单选题Many factory workers find their jobs tiresome.A. difficultB. pointlessC. profitableD. boring

单选题The chemical is deadly to rats but safe to cattle.

单选题Colleges and universities usually give diplomas or certificates to students who complete course requirements {{U}}adequately{{/U}}. A. responsibly B. sufficiently C. patiently D. successfully

单选题The story was touching .

单选题Your hair is so {{U}}tangled{{/U}} that it looks as if it has not been combed for a month.

单选题The sea was calm and still.

单选题I want an appointment with a definite time and place.A. durableB. deliciousC. fixedD. favorable

单选题She put down her {{U}}skinny{{/U}} hand slowly.

单选题Since ancient times people have found various ways to {{U}}preserve{{/U}} meat. A. eat B. cook C. freeze D. keep

单选题This is the unique solution to our problem. A. only B. alone C. single D. lonely

单选题Do Patients Trust Doctors Too Much Earlier this year, the American College of Surgeons, the national scientific and educational organization of surgeons conducted a nationwide survey that found that the average patient devotes an hour or less to researching his or her surgery or surgeon. While prospective patients worry about the costs or complications of an operation, they don't necessarily look for information that would address their concerns. In fact, more than a third of patients who had an operation in the last five years never reviewed the credentials of the surgeon who operated. Patients are more likely to spend time researching a job change (on average, about 10 hours) or a new car (8 hours) than the operation they are about to submit to or the surgeon who wields (支配) the knife. And many patients are satisfied with the answers they receive from their surgeons or primary care doctors, whoever those individuals happen to be. I felt curious about the survey, so I called Dr. Thomas Russell, executive director of the American College of Surgeons. "There is a tendency for patients not to get particularly involved and not to feel compelled to look into their surgery or surgeons." he told me. There are consequences to that kind of blind trust. "Today, medicine and surgery are really team sports." Dr. Russell continued, "and the patient, as the ultimate decision maker, is the most important member of the team. Mistakes can happen, and patients have to be educated and must understand what is going on. " In other words, a healthy doctor-patient relationship does not simply entail good bedside manners and responsible office management on the part of the doctor. It also requires that patients come to the relationship educated about their doctors, their illnesses and their treatment. "If we are truly going to reform the health care system in the US," Dr. Russell said, "everybody has to participate actively and must educate themselves. That means doctors, nurses, other health care professionals, lawyers pharmaceutical companies, and insurance companies. But most of all, it means the patient." Trust is important. But as Sir Francis Bacon, who was among the first to understand the importance of gathering data in science, once observed, knowledge is power.

单选题Mysterious Nazca Drawings One of the most mysterious archaeological spectacles in the world is the immense complex of geometrical symbols, giant ground-drawings of birds and animals, and hundreds of long, ruler-straight lines ,some right across mountains, which stretch over 1,200 square miles of the Peruvian tablelands, at Nazca. Nazca was first revealed to modern eyes in 1926 when three explorers looked down on the desert from a hillside at dusk and briefly saw a Nazca line highlighted by the rays of the sun. But it was not until the Peruvian airforce took aerial photographs in the 1940s that the full magnificence of the panorama was apparent. Hundreds of what looked like landing strips for aircraft were revealed. There were eighteen bird-like drawings, up to 400 feet long; four-sided figures with two lines parallel; and long needle-like triangles which ran for miles. Among the many abstract patterns were a giant spider, a monkey, a shark, all drawn on the ground on a huge scale. The scale is monumental, but from the ground almost invisible and totally incomprehensible. The amazing fact about Nazca, created more than 1,500 years ago, is that it can only be appreciated if seen from the air. Many, therefore, regarded it as a prehistoric landing ground for visitors from outer space, but Jim Woodman, an American explorer, who was long fascinated by the mystery o{ Nazca, had a different opinion. He believed that Nazca only made sense if the people who had designed and made these vast drawings on the ground could actually see them, and that led him to the theory that the ancient Peruvians had somehow learned to fly, as only from above could they really see the extent of their handiwork. With this theory in mind, he researched into ancient Peruvian legends about flight and came to the conclusion that the only feasible answer was a hot-air balloon. To prove his theory, Woodman would have to make such a thing using the same fabrics and fibers that would have been available to the men of Nazca at the time. He started by gathering information from ancient paintings, legends, books and archaeological sites. After many attempts, Woodman built a balloon-type airship. It took him into the air, letting him have the sensation he had never had from viewing the same ground that he had seen many times. His flight was a modern demonstration of an ancient possibility.

单选题Accompanied by cheerful music, we began to dance.

单选题The secretary is expected to explore ideas for post-war reconstruction of the area.

单选题Obesity: the Scourge of the Western World Obesity is rapidly becoming a new scourge of the western world, delegates agreed at the 11th European Conference on the issue in Vienna Wednesday to Saturday. According to statements before the opening of the conference—of 2,000 specialists from more than 50 countries—1.2 billion people worldwide are overweight, and 250 million are obese. Professor Bernhard Ludvik of Vienna General Hospital said: "Obesity is a chronic illness. In Germany, 20 percent of the people are already affected, but in Japan only one percent." But he said that there was hope for sufferers thanks to the new scientific discoveries and medication. Professor Friedrich Hopichler of Salzberg said: "We are living in the new age (but) with the metabolism of a stone age man." "I have just been to the United States. It is really terrible. A pizza shop is springing up on every corner. We have been overrun by fast food and Coca-Cola-ization." Many of the experts stressed that obesity was a potential killer. Hopichler said: "80 percent of all diabetics are obese, also 50 percent of all patients with high blood pressure and 50 percent with adipose tissue complaints." "10 percent more weight means 13 percent more risk of heart disease. Reducing one"s weight by 10 percent leads to 13 percent lower blood pressure." Another expert Hermann Toplak said that the state health services should improve their financing of preventive programs. "Though the health insurance pays for surgery (such as reducing the size of the stomach) when the body-mass index is more than 40. That is equivalent to a weight of 116 kilograms for a height of 1.70 meters. One should start earlier." Ludvik said that prevention should begin in school. "Child obesity (fat deposits) correlates with the time which children spend in front of TV sets." The consequences were only apparent later on. No more than 15 percent of obese people lived to the average life expectancy for their population group.

单选题Afterwards there was just a feeling of let-down .

单选题A large sum of money has been {{U}}allocated{{/U}} for buying new books for the library. A. assigned B. persuaded C. asked D. ordered

单选题The government is (debating) the education laws.

单选题Azeri Hills Hold Secret of Long Life You can see for kilometers from the mountains where Allahverdi Ibadov herds his small flock of sheep amid a sea of yellow, red, and purple wildflowers. The view from Amburdere in southern Azerbaijan toward the Iranian border is spectacular, but Mr. Ibadov barely gives it a second glance. Why should he? He's been coming here nearly every day for 100 years. According to his carefully preserved passport, Mr. Ibadov, whose birth was not registered until he was a toddler, is at least 105 years old. His wife, who died two years ago, was even older. They are among the dozens of people in this beautiful, isolated region who live extraordinarily long lives. Mr. Ibadov's eldest son has just turned 70. He lost count long ago of how many grandchildren he has. "I'm an old man now I look after the sheep, and I prepare the wood for winter. I still have something to do. " A. lifetime of toil, it seems, takes very few people to an early grave in this region. Scientists admit there appears to be something in the Azeri mountains that gives local people a longer, healthier life than most. Miri Ismailov's family in the tiny village of Tatoni are convinced that they know what it is. Mr. Ismailov is 110, his great-great-grandson is four. They share one proud boast: Neither has been to a doctor. "There are hundreds of herbs on the mountain, and we use them all in our cooking and for medicines" ; explained Mr. Ismailov's daughter, Elmira. "We know exactly what they can do. We are our own doctors. " There is one herb for high blood pressure, another for kidney stones, and a third for a hacking cough. They are carefully collected from the slopes surrounding the village. Experts from the Azerbaijan Academy of Science believe the herbs may be part of the answer. They have been studying longevity in this region for years. It began as a rare joint Soviet-American project in the l980s,but these studies are not being funded any more. Azeri scientists have isolated a type of saffron unique to the southern mountains as one thing that seems to increase longevity. Another plant, made into a paste, dramatically increases the amount of milk that animals are able to produce. "Now we have to examine these plants clinically to find out which substances have this effect, " said Chingiz Gassimov, a scientist at the academy. The theory that local people have also developed a genetic predisposition to long life has been strengthened by the study of a group of Russian émigrés whose ancestors were exiled to the Caucasus 200 years ago. The Russians' life span is much shorter than that of the indigenous mountain folk — though it is appreciably longer than that of their ancestors left behind in the Russian heartland. "Over the decades, I believe local conditions have begun to have a positive effect on the new arrivals" ,Professor Gassimov said. "It's been slowly transferred down the generations. " But Mr. Ismailov, gripping his stout wooden cane, has been around for too long to get overexcited. "There's no secret, " he shrugged dismissively. "I look after the cattle and I eat well. Life goes on. /

单选题Practically all animals communicate either through sounds or through soundless codes.