单选题(Like) a motion picture, which presents (moving) images on a flat surface, a cyberspatial environment would convey realistic (detail) in three dimensions and (to) all five senses.

单选题Curriculum reforms in India took a more (nationalistic) turn (as) a (growing) number of foundation-sponsored private schools supplemented the government syllabus (by) studies of Indian culture, music, philosophy, and Sanskrit language.

单选题Even though you just got fired, remember______— at least you don't have to work for that grouchy boss anymore!

单选题For most companies and factories, the fewer the injury ______, the better their workman's insurance rate.

单选题The average young American now spends practically every waking minute — except for the time in school, though reluctantly — using a smart phone, computer, television or other electronic devices, according to a new study. Those ages 8 to 18 spend seven and a half hours a day with such devices, compared with less than six and a half hours five years ago. And that does not count the hour and a half that youths spend texting, or the half hour they talk on their cellphones. And because so many of them are multitasking — say, surfing the Internet while listening to music — they pack on average nearly 11 hours of media content into that seven and a half hours. The study's findings shocked its authors, who had concluded in 2005 that use could not possibly grow further, and confirmed the fears of many parents whose children are constantly tethered to media devices. It found, moreover, that heavy media use is associated with several negatives, including behavior problems and lower grades. Dr. Michael Rich, a pediatrician at Children's Hospital Boston who directs the Center on Media and Child Health, said that with media use so ubiquitous , it was time to stop arguing over whether it was good or bad and accept it as part of children's environment, "like the air they breathe, the water they drink and the food they eat." Contrary to popular wisdom, the heaviest media users reported spending a similar amount of time exercising as the light media users. Nonetheless, other studies have established a link between screen time and obesity. While most of the young people in the study got good grades, 47 percent of the heaviest media users — those who consumed at least 16 hours a day — had mostly C's or lower, compared with 23 percent of those who typically consumed media three hours a day or less. The heaviest media users were also more likely than the lightest users to report that they were bored or sad, or that they got into trouble, did not get along well with their parents and were not happy at school. The study could not say whether the media use causes problems, or, rather, whether troubled youths turn to heavy media use. "This is a stunner," said Donald F. Roberts, one of the authors of the study. "In the second report, I remember writing a paragraph saying we've hit a ceiling on media use, since there just aren't enough hours in the day to increase the time children spend on media. But now it's up an hour."

单选题Before deciding to litigate the matter, they had tried to negotiate a solution out of court.

单选题Few visitors care that the neighborhood is dominated by highrises and skyscrapers.

单选题"Common language" here usually means a foreign language, but the same point applies in principle ______ any encounter with unfamiliar dialects or styles within a single language.

单选题I called on him the morning after our arrival, and was ______ with his gay, precise manner and obvious power of decision.

单选题Non-Americans have a long way to go before they reach that level—720L of soft drinks a year—and that would ______ booming business for the two giants.

单选题Bubbles, flaws, and other irregularities diffuse the light that passes through stained glass, ______the glass sparkle.

单选题I don't______expert knowledge of this subject.

单选题She ______ fifty or so when I first met her at the conference. A. must be B. had been C. could be D. must have been

单选题Skilled technicians and advanced technologies enable us to build uncompromised quality into all our cars, because our first ______ is bringing you pleasure for years to come.

单选题The human skeleton consists of more than two hundred bones ______ together by tough and relatively inelastic connective tissues called ligaments.

单选题All flights______, we decided to take a greyhound.

单选题Despite her compassionate nature, the new nominee to the Supreme Court was single-minded and ______in her strict adherence to the letter of the law.

单选题Elephants are the only remaining family in their biological order. There are three living species of elephants. These are the African bush and forest elephants and the Asia. Other species have been extinct since the last ice age. Elephants are the largest land mammals alive today. Their pregnancy period is 22 months. It is the longest of any land animal. At birth, it is common for an elephant calf to weigh 120 kg. An elephant may live as long as 70 years, and some even live longer. The largest elephant ever recorded was shot in Angola in 1956. It was male and weighed about 12, 000 kg. The smallest elephants were about the size of a calf or a large pig. They were a prehistoric variant that lived on the island of Crete. They existed until between 3000 BC and 5000 BC. Elephants are increasingly threatened by humans. Human-elephant conflicts are often deadly. They kill 150 elephants and up to 100 people per year in Asia. The African elephant population has gone from 3 million in 1970 to about 600, 000 in 1989. The numbers of this beast then dropped even further. By 2000 the number was down to 272, 000. In recent years, efforts to save these animals have helped it rise. The elephant is now protected around the world. Many restrictions have been enacted for their benefit, strictly limiting their capture and domestic use. Trade in products such as ivory is also controlled. Some scientists believe the elephant family is distantly related to sea cows. They also think there is a link between elephants and hyraxes. The fossil evidence does not offer certain proof while many believe the genetic evidence shows this. One theory suggests that these animals spent most of their time underwater. They would have used their trunks like snorkels for breathing. Modern elephants still have this ability, and they are known to swim like that. They can swim for up to 6 hours and 50 km.

单选题A Small distinctions among stamps, B unimportant to C the person average , would mean D a great deal to the stamp collector.

单选题She came to New York when she was seventeen. Because her older sister lived there and she was influenced by her sister.