单选题Since ancient times people have found various ways to preserve meat.

单选题Her faith upheld her in times of sadness.

单选题Age is one of the {{U}}variables{{/U}} which seems to determine the attitude of an older person toward conformity.

单选题The oldest preserved manuscripts are those written on papyrus, which were found in Egyptian tombs. A．protected B．hidden C．sought D．discovered

单选题Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour. A．rates B．impacts C．ratios D．pulses

单选题Participation in intramural sports is required. A．within the school B．with outsiders C．overly strenuous D．extraordinary

单选题U.S. to Start $3.2 Billion Child Health Study in January A study that will cost $3.2 billion and last more than two decades to track the health of 100,000 U.S. children from before birth to age 21 will be launched in January, U.S. health officials said on Friday. Officials from the U. S. government's National Institutes of Health said they hope the study, to be conducted at 105 locations throughout the United States, can help identify early-life influences that affect later development, with the goal of learning new ways to treat or prevent illness. The study will examine hereditary and environmental factors such as exposure to certain chemicals that affect health. Researchers will collect genetic and biological samples from people in the study as well as samples from the homes of the women and their babies including air, water, dust and materials used to construct their residences, the NIH said. Officials said more than $200 million has been spent already and the study is projected to cost $3.2 billion. "We anticipate that in the long term, what we learn from the study will result in a significant savings in the nation's health care costs," Dr. Duane Alexander, who heads the NIH's Eunice Kennedy Shriver National Institute of Child Health and Human Development, told reporters. The study will begin in January when the University of North Carolina and the Mount Sinai School of Medicine in New York start signing up pregnant women whose babies will then be followed to age 21. Some of the early findings will be about factors behind pre-term birth, which has become more common in recent years, according to Dr. Peter Scheid of the NIH, who heads the study. The people taking part will be from rural, urban and suburban areas, from all income and educational levels and from all racial groups, the NIH said.

单选题After years of research,Charles Drew devised a procedure for preserving plasma.

单选题According to Paragraph 2, many people start small businesses in order to

单选题Many forms of cancer can be cured if detected early

单选题The committee comprises five persons.A. absorbsB. concernsC. excludesD. involves

单选题I enjoyed the play-it had a clever plot and very funny dialogues.

单选题The plane will be taking off in approximately 10 minutes. A. about B. possibly C. probably D. rarely

单选题The Street Violinist I got up and dressed, stuck my violin under my jacket, and went out into the streets to try my luck. I wandered about for an hour, looking for a likely spot, feeling as though I were about to commit a crime. Then I stopped at last under a bridge near the station and decided to have a try. I felt tense and nervous. It was the first time, after all. I drew the violin from under my coat like a gun. It was here, in Southampton, with trains rattling overhead, that I was about to declare myself. One morning I was part of the hurrying crowds, the next I stood apart, my back to the wall, my hat on the pavement before me, the violin under my chin. The fist notes I played were loud and raw, like a declaration of protest. Then they settled down and began to run more smoothly and to stay more or less in turn. To my surprise I was neither arrested nor told to shut up. Indeed, nobody took any notice at all. Then an old man, without stopping, surreptitiously tossed a penny into my hat as though getting out of some guilty evidence. I worked the streets of Southampton for several days, gradually acquiring the truths of the trade by trial and error. It was not a good thing, for instance, to let the hat fill up with money—the sight could discourage the patron. Nor was it wise to empty it completely, which could also confuse him, giving him no hint as to where to drop his money. Placing a couple of pennies in the hat to start the thing going soon became a regular ritual, making sure between tunes, to hide most of the earnings, but always leaving two pennies behind. Old ladies were most generous, and so were women with children, shopgirls, typists and barmaids. As for the man, heavy drinkers were always willing listeners and so were big guys with muscles. But never a man with a gentleman's hat, briefcase or dog. Respectable types were the meanest of all. Except for retired army officers, who would tell " why aren't you working, young man?" and then toss some money into the hat to hide their confusion.

单选题She was grateful to him for being so good to her.

单选题Among all the essays, his was picked out as the best one by the professors. A. selected B. labeled C. elected D. considered

单选题I support your decision, but I should also make it clear that I am not going to be restricted to it.

单选题When there is a(n) {{U}}slump{{/U}} in a country it is difficult to do trade, and many people are out of work.

单选题 The Cherokee Nation Long before the white man came to America, the land belonged to the American Indian nations. The nation of the Cherokees lived in what is now the southeastern part of the United States. After the white man came, the Cherokees copied many of their ways. One Cherokee named Sequoyah saw how important reading and writing was to the white man. He decided to invent a way to write down the spoken Cherokee language. He began by making word pictures. For each word he drew a picture. But that proved impossible—there were just too many words. Then he took the 85 sounds that made up the language. Using his own imagination and an English spelling book, Sequoyah invented a sign for each sound. His alphabet proved amazingly easy to learn. Before long, many Cherokees knew how to read and write in their own language. By 1828, they were even printing their own newspaper. In 1830, the US Congress passed a law. It allowed the government to remove Indians from their lands. The Cherokees refused to go. They had lived on their lands for centuries. It belonged to them. Why should they go to a strange land far beyond the Mississippi River? The army was sent to drive the Cherokees out. Soldiers surrounded their villages and marched them at gunpoint into the western territory. The sick, the old and the small children went in carts, along with their belongings. The rest of the people marched on foot or rode on horseback. It was November, yet many of them still wore their summer clothes. Cold and hungry, the Cherokees were quickly exhausted by the hardships of the journey. Many dropped dead and were buried by the roadside. When the last group arrived in their new home in March 1839, more than 4,000 had died. It was indeed a march of death.

单选题下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 Something Men Do Not Like to Do Eric Brown hates shopping. "It's just not enjoyable to me, " said the 28-year-old. Chicago man who was carrying several shopping bags along the city's main street, Michigan Avenue. " When I'm out{{U}} (51) {{/U}}, I basically know what I want to get. I rush in. I buy it. I{{U}} (52) {{/U}}." Common wisdom says that guys hate to shop. You can ask generations of men. But people who study shopping say that a number of social, cultural and economic factors are now{{U}} (53) {{/U}}this "men-hate- to-shop" notion. "{{U}} (54) {{/U}}social class, ethnicity(种族划分), age-men say they hate to shop, "says Sharon Zukin, a City University of New York sociology professor. "Yet when you ask them deeper questions, it turns out that they{{U}} (55) {{/U}}to shop. Men generally like to shop for{{U}} (56) {{/U}}, music and hardware. But if you ask them about the shopping they do for books or music, they'll say 'Well' that's not shopping. That's{{U}} (57) {{/U}}". In other words, what men and women call "buying things" and how they approach that task are{{U}} (58) {{/U}}.Women will{{U}} (59) {{/U}}through several 1,000-square-metre stores in search of the perfect party dress. Men will wander through 100 Internet sites in search of the{{U}} (60) {{/U}}digital camcorder (可携式摄像机). Women see shopping as a social event. Men see it as a mission or a{{U}} (61) {{/U}}to be won. "Men are frequently shopping to win, "says Mary Ann McGrath, a marketing professor at Loyola University of Chicago. "They want to get the best deal. They want to get the best one, The last one and if they do that it{{U}} (62) {{/U}}them happy." When women shop, "they're doing it in a way where they want{{U}} (63) {{/U}}to be very happy," says McGrath. "They're kind of shopping for love. " In fact, it is in clothing where we see a male-female{{U}} (64) {{/U}}most clearly. Why, grumble(发牢骚) some men, are all male clothes navy, grey, black or brown? But would they wear light green or pink? These days, many guys wear a sort of "uniform", says Paco Underhill, author of Why We Bye, "It's been hard for them to understand what it means to be fashion. Conscious in a business way. It becomes much, much easier if you{{U}} (65) {{/U}}your range of choices. "