单选题Defined most broadly, folklore includes all the customs, beliefs and traditions that people have handed down from generation to generation.

单选题Customers often defer payment for as long as possible. A. make B. demand C. postpone D. obtain

单选题California—a Land of Variety and Contrast California is a land of variety and contrast. Almost every type of physical land feature, sort of arctic ice fields and tropical jungles can be found within its borders. Sharply contrasting types of land often lie very close to one another. People living in Bakersfield, for instance, can visit the Pacific Ocean, the coastal plain, the fertile San Joaquin Valley, the arid Mojave Desert, and the high Sierra Nevada, all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day, without having to travel long distance. Contrast abounds in California. The highest point in the United States (outside Alaska) is in California, and so is the lowest point (including Alaska). Mount Whitney, 14,494 feet above sea level, is separated from Death Valley, 282 feet below sea level, by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles. California has deep, clear mountain lakes like Lake Tahoe, the deepest in the country, but it also has shallow, salty desert lakes. It has Lake Tulainyo, 12,020 feet above sea level, and the lowest lake in the country, the Salton Sea, 236 feet below sea level. Some of its lakes, like Owens Lake in Death Valley, are not lakes at all: they are dried up lake beds. In addition to mountains, lakes, valleys, deserts, and plateaus, California has its Pacific coastline, stretching longer than the coastlines of Oregon and Washington combined.

单选题Please let me know if you are unable to {{U}}attend{{/U}} the meeting. A. go to B. prepare for C. speak to D. do to

单选题We"ve seen a marked shift in our approach to the social issues.

单选题John survives on 100 pounds a month.

单选题Oseola MeCarty Late one Sunday afternoon in September 1999, Oseola McCarty, an elderly cleaning lady passed away in the little wooden flame house where she had lived and worked for most of her life. It may seem like an ordinary end to a humble life, but there was something quite exceptional about this woman. In the summer of 1995, McCarty gave $150, 000, most of the money she had saved throughout her life, to the University of Southern Mississippi in her hometown. The money was to help other African Americans through university. She had started her savings habit as a young child when she would return from school to clean and iron for money which she would then save. She led a simple, frugal existence, never spending on anything but her most basic needs. Her bank also advised her on investing her hard-earned savings. When she retired, she decided that she wanted to use the money to give children of limited means the opportunity to go to university. She had wanted to become a nurse, but had to leave school to look after ill relatives and work. When asked why she had given her life savings away, she replied, "I"m giving it away so that children won"t have to work so hard, like I did." After news of her donation hit the media, over 600 donations were made to the scholarship fund. One was given by media executive, Ted Turner, who reputedly gave a billion dollars. She didn"t want any fuss made over her gift, but the news got out and she was invited all over the United States to talk to people. Wherever she went, people would come up to her to say a few words or to just touch her. She met the ordinary and the famous, President Clinton included. In the last few years of her life, before she died of cancer, McCarty was given over 300 awards: she was honoured by the United Nations and received the Presidential Citizen"s Medal. Despite having no real education, she found herself with two honorary doctorates: one from the University of Southern Mississippi and the other from Harvard University. Her generosity was clearly an inspiration to many and proof that true selflessness does exist.

单选题It is (virtually) impossible to persuade him to apply forthe job,

单选题Attitudes to mental illness have shifted in recent years.

单选题The word “devastating” in the last paragraph could be best replaced by

单选题Stress level Tied to Education Level People with less education suffer fewer stressful days, according to a report in the current issue of the Journal of Health and Social Behavior. However, the study also found that when less-educated people did suffer stress it was more severe and had a larger impact on their health. From this, researchers have concluded that the day-to-day factors that cause stress are not random. Where you are in society determines the kinds of problems that you have each day, and how well you will cope with them. The research team interviewed a national sample of 1,031 adults daily for eight days about their stress level and health. People without a high school diploma reported stress on 30 percent of the study days, people with a high school degree reported stress 38 percent of the time, and people with college degrees reported stress 44 percent of the time. "Less advantaged people are less healthy on a daily basis and are more likely to have downward turns in their health," lead researcher Dr Joseph Grzywacz, of Wake Forest University Baptist Medical Center, said in a prepared statement. "The downward turns in health were connected with daily stressors, and the effect of daily stressors on their health is much more devastating for the less advantaged. " Grzywacz suggested follow-up research to determine why less-educated people report fewer days of stress when it is known their stress is more acute and chronic. "If something happens every day, maybe it's not seen as a stressor," Grzywacz says. "Maybe it is just life. /

单选题They agreed to settle the dispute by peaceful means.

单选题Concrete is a durable, watertight, and incombustible material that is, {{U}}moreover{{/U}}, inexpensive to make.

单选题In the last paragraph the statement "only one became Pele' indicates that

单选题The book took ten years of thorough research.

单选题Solar Power Without Solar Cells A dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power without traditional semiconductor-based solar cells. "The researchers found a way to make an optical 1 "said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics. Light has electric and magnetic components. Until now, scientists thought the 2 of the magnetic field were so weak that they could be ignored. What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity, the light field can generate magnetic effects that are 100 million times stronger than 3 expected. 4 these circumstances, the magnetic effects develop strength equivalent to a strong electric effect. "This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation," Rand said. "In solar cells, the 5 goes into a material, gets absorbed and creates heat. Here, we expect to have a very low heat load. Instead of the light being absorbed, energy is stored in the magnetic moment. Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power 6 ." What makes this possible is a previously undetected brand of "optical rectification," says William Fisher, a doctoral student in applied physics. In traditional optical rectification, light"s electric field causes a charge separation, or a pulling 7 of the positive and negative charges in a material. This sets up a voltage, similar to 8 in a battery. Rand and Fisher found that under the right circumstances and in right types of materials, the light"s magnetic field can also create optical rectification. The light must be shone through a 9 that does not 10 electricity, such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn"t this intense on its own, but new materials are being sought that would work at lower intensities, Fisher said. "In our most recent paper, we show that incoherent light like sunlight is theoretically almost as 11 in producing charge separation as laser light is," Fisher said. "This new 12 could make solar power cheaper, "the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in 13 solar power to useable energy. That"s equivalent to today"s commercial-grade solar cells. "To manufacture 14 solar cells, you have to do extensive semiconductor processing," Fisher said. "All we would need are lenses to focus the light and a fiber to guide it. Glass works for 15 . It"s already made in bulk, and it doesn"t require as much processing. Transparent ceramics might be even better."

单选题It was a magic night until the Uspell/U was broken.

单选题In the latter ease the outcome can be serious indeed. A. result B. judgment C. decision D. event

单选题She is sick .

单选题A Life with Birds For nearly 17 years David Cope has worked as one of the Tower of London's Yeoman Warders, (51) known to tourists as Beefeaters. David, 64, lives in a three-bedroomed flat right at the (52) of the Byward Tower, one of the gatehouses. " (53) our bedroom we have a marvellous view of Tower Bridge and the Thames. " says David. The Tower of London is famous (54) its ravens, the large black birds which have lived there for over three centuries. David was immediately fascinated by the birds and when he was (55) the post of Raven Master eight years ago he had no (56) in accepting it. "The birds have now become my life and I'm always (57) of the fact that I am (58) a tradition. The legend says that if the ravens leave the Tower, England will fall to enemies, and it's my job to (59) sure this doesn't happen!" David (60) about four hours a day to the care of the ravens. He has grown to love them and the (61) that he lives right next to them is ideal. "I can 62．a close eye on them all the time, and not just when I'm working. " (63) , David's wife Mo was not (64) on the idea of life in the Tower, but she too will be sad to leave when he retires next year. "When we look out of our windows we see history (65) around us, and we are taking it in and storing it up for our future memories. /