单选题After flexing its mechanical arm and finding some puzzling chemistry in a patch of Martian soil,the robotic rover Spirit began investigating the composition of a rock named Adirondack yesterday with two science instruments and a microscopic camera. Following programmed instructions from flight controllers, the six-wheel rover made several short turns and moved forward about six feet. It stopped within inches of the pyramid-shaped rock, about the size of a football. It was the vehicle's second maneuver on the Martian surface since landing there on Jan. 3. Scientists at the Jet Propulsion Laboratory in Pasadena, Calif., said they did not expect results of the first rock examination until early today. But they were already both pleased and puzzled over the soil test results. "We're starting to put together a picture of what the soil at Gusev is really like," Dr. Steven W. Squyres of Cornell, the principal scientist of the mission, said at a news conference in Pasadena. He was referring to the Spirit's landing site in Gusev crater, near the Martian equator. Two of the Spirit's main science instruments, the M6ssbauer spectrometer and the alpha particle X-ray spectrometer, made a close examination of soil near the landing base. German scientists in charge of the studies reported that X-rays emitted by the surface soil indicated a chemical composition mainly of silicon and iron, with smaller amounts of sulfur, chlorine and argon. Argon is a noble gas that is part of the Martian atmosphere. Previous Martian sites visited by landing craft also contained significant amounts of sulfur and chlorine. Other members of the project's science team said the M6ssbauer spectrometer found considerable amounts of the mineral olivine in the soil. Olivine, which contains oxygen, iron and magnesium, is often found in volcanic rocks. The Martian soil may resemble the volcanic soil of Hawaii. "One possibility is that this soil is simply ground-up lava," Dr. Squyres said. "That would surprise me, but it's entirely possible that beneath .those grains there is solid rock and we are detecting some of that solid rock, not the s0il." Another property of the soil perplexed geologists. The fine grains of the Gusev surface seem to stick together in dry clumps. Geologists suspected static electricity as the clinging force. If so, they said, the soil should collapse and flatten out when the M6ssbauer spectrometer pressed against the ground. Nothing collapsed, leading Dr. Squyres to ask what force was. responsible for holding them together.

单选题Readers are required to {{U}}abide by{{/U}} the rules of the library and mind their manners.

单选题All our efforts to save her did not ______ anything.

单选题At the University of California at Los Angeles (UCLA) , a student loaded his class notes into a handheld e-mail device and tried to read them during an exam: a classmate turned him in. At the University of Nevada at Las Vegas (UNLV) students photographed test questions with their cell phone cameras and transmitted them to classmates. The university put in place a new examination-supervision system. "If they'd spend as much time studying, they'd all be A students," says Ron Yasbin, dean of the College of Sciences of UNLV. With a variety of electronic devices, American students find it easier to cheat. And college officials find themselves in a new game of eat and mouse. They are trying to fight would-he cheats in the exam season by cutting off Internet access from laptops(笔记本电脑), demanding the surrender of cell phones before tests or simply requiring that exams be taken with pens and paper. "It is annoying. My hand-writing is so bad," said Ryan Dapremont, 21 who just finished his third year at Pepperdine University in California. He had to take his exams on paper. Dapremont said technology has made cheating easier, but plagiarism(剽窃) in writing papers was probably the biggest problem. Students can lift other people's writings off the Internet without attributing them. Still, some students said they thought cheating these days was more a product Of the mindset, not the tools at hand. "Some people put too much emphasis on where they're going to go in the future, and all they're thinking about is graduate school and the next step," said Lindsay Nicholas, a third-year student at UCLA. She added that pressure to succeed "sometimes clouds everything and makes people do things that they shouldn't do. " Some professors said they tried to write exams for which it was hard to cheat, posing questions that outside resources would not help answer. Many officials said that they rely on campus honor codes. They said the most important thing was to teach students not to cheat in the first place.

单选题Although I felt suspicious Uat first/U, I have come to believe what she said that day.

单选题The boss felt suspicious about the truth of the account, therefore, he determined to get down to having a good check.

单选题 Leo Tolstoy was a Russian writer and moral philosopher, and one of the world's greatest novelists. He was born on April 30,1828 and died on Feb. 14, 1910. His writings {{U}}(1) {{/U}} influenced much of 20th-century literature, and his moral {{U}}(2) {{/U}} helped shape the thinking of several important {{U}}(3) {{/U}} and political leaders. Leo Nikolayevich Tolstoy was born {{U}}(4) {{/U}} a family of noble landowners at his family {{U}}(5) {{/U}} south of Moscow. His early education came from tutors at home, but after the deaths of his parents in the 1830s, he was {{U}}(6) {{/U}} by relatives. He entered Kazan' University when he was 16 but preferred to educate himself independently, and in 1847 he {{U}}(7) {{/U}} his studies without finishing his degree. His next 15 years were very {{U}}(8) {{/U}}. Tolstoy returned to manage the family estate, with the determination to improve himself {{U}}(9) {{/U}} and physically. Alter less than two years, however, he abandoned rural life {{U}}(10) {{/U}} the pleasures of Moscow. In 1851 Tolstoy traveled to the Caucasus, a region then part of southern Russia, {{U}}(11) {{/U}} his brother was serving in the army. He was {{U}}(12) {{/U}} as a volunteer, serving with distinction in the Crimean War from 1853 to 1856. Tolstoy began his literary career during his army service, and his first work, the semiautobiographical short novel Childhood {{U}}(13) {{/U}} was published in 1852, brought him fame. A series of other stories {{U}}(14) {{/U}} , and when he left the army in 1856 he was acknowledged as a rising new talent in literature. Tolstoy achieved great literary fame during his lifetime, both in Russia and abroad. Thirty-one translations of his works {{U}}(15) {{/U}} in the year 1887 alone. The most significant part of Tolstoy's legacy may be his defense of the individual personality.

单选题A: Daivd said he bought a new BMW for 5,000! B: ______ sounds pretty cheap to me! A: Well, that's what he said.

单选题Why did many American scholars become enthusiastic about humanistic studies after World War Ⅱ?

单选题Man: It's such a warm day. I think I'll do some reading in the sunshine. Woman: I'd like to join you but I find it easier to concentrate here. Question: What is the woman going to do?

单选题Woman: Does a half gallon of fresh milk still sell for $1.50? Man: Yes, but today if you buy two half-gallons, the second is only half price. Question: How much will the man pay for a gallon of fresh milk today?

单选题A: You know who came yesterday?B: Yao Ming ? We had a football match.A: ______ He came and watched the game!

单选题Man: I call to ask for some information about the cost of the trip to Los Angeles. Woman: I'm sorry, sir. I can't give you that information. The travel agent will be able to help you. Question: Where do you think the conversation most probably takes place?

单选题The government"s inability to ______ its own laws and regulations disappointed the electorate (选民).

单选题Money is a key element in economic and business activities and has been the theme of many witty remarks. Benjamin Franklin once wrote, "Money makes money, and the money (61) makes, makes more money." To most of us, money is (62) but the currency of a country. But to some people, money is either the best friend or the worst demon. To (63) ,however, money is a subject for study and for something to be money, it must at (64) have the following characteristics: portability, divisibility, stability, durability and acceptability. (65) , nowadays, money has got a lot of (66) : credit cards, debit cards, access cards, IC cards, etc, but they are usually (67) plastic money or electronic money, because they are used like money. (68) a credit card, for example, you can buy books and ties, pay your restaurant bills and taxi fares. You can (69) make a small overdraft if you cannot make your (70) meet this month. "Don't (71) home without it," American Express, one of the leading credit card issuers once (72) us. For many, (73) a reminder is no (74) necessary, because the plastic money is so safe and so convenient that many people (75) leave home without cash but never without a credit card.

单选题Man: I have called you several times, but you were not home. What have you been up to?Woman: I have joined a weight-loss support group, and now I feel great to be able to shop in the regular women's department.Question: What is the woman's aim to join the group?

单选题Children model themselves largely on their parents. They do so mainly through identification. Children identify (61) a parent when they believe they have the qualities and feelings that are (62) of that parent. The things parents do and say—and the (63) they do and say to them—strongly influence a child's (64) . A parent's actions (65) affect the self image that a child forms (66) identification. Children who see mainly positive qualities in their (67) will likely learn to see themselves in a positive way. Children who observe chiefly (68) qualities in their parents will have difficulty (69) positive qualities in themselves. Children may (70) their self image, however, as they become increasingly (71) by peer groups. In the case of a dramatic change in family relations, the (72) of an activity or experience depends on how the child interprets it. Children interpret such events according to their established attitudes and previous training. Children who know they are loved can, (73) , accept the divorce of their patents or a parent's early (74) . But if children feel unloved, they may interpret such events (75) a sign of rejection or punishment.

单选题A：We can make it 7 p.m. B: ______

单选题Man: Would you do me a favor by sitting next to Jane?Woman: Oh, I don't want the concert to be spoiled by her incessant long talk.Question: What does the woman's response mean?