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要将正实数x保留两位小数，若采用Int()函数完成，则表达式为______。
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在一个查询集中，要将指定的记录设置为当前记录，应该使用的宏操作命令是______。
Once found "almost entirely in the western United States and in Asia, dinosaur fossils are now being discovered on all seven continents. A host of new revelations emerged in 1998 that promise to reshape scientists’ views of dinosaurs, including what they looked like and when and where they lived. It is doubtful that Tyrannosaurus Re had lips or that Triceratops had cheeks, says Lawrence Witmer, an assistant professor of anatomy at Ohio University in Athens, Ohio. Witmer was a leading researcher for a study on dinosaur anatomy that was presented at the annual meeting of the Society for Vertebrate Paleontology, which concluded on October 3 in Snowbird, Utah. Witmer’s study reached its conclusions by using high - tech computerized aial tomography (CT or CAT) scans along with comparative anatomy studies. For example, the theory that Triceratops and similar dinosaur species had cheeks was based on past comparisons with mammals such as sheep. But Witmer’s careful analysis found the structure of the Triceratops jaw and skull made it more likely that Triceratops had a beak like that of an eagle. Witmer said that scientists should use birds and crocodiles as models when researching the appearance of dinosaurs. In early October scientists announced that they had confirmed the discovery of a new type of ceratopsian dinosaur. The dinosaur’s bones, found in New Mexico in 1996, are forcing paleontologists to rethink their theories about when ceratopsians migrated to what is now North America. Scientists previously thought that ceratopsians, the group that included the well - known Triceratops, arrived in North America from Asia between 70 million and 80 million years ago. During this time, the late Cretaceous Period, the earth’s two supercontinents -- Laurasia in the north and Gondwanaland in the south -- were in the process of pulling apart, cutting dinosaur populations off from each other and interrupting migratory patterns. The fossilized bones, found by eight - year - old Christopher Wolfe and his father, paleontologist Doug Wolfe of the Mesa Southwest Museum in Arizona, date to about 90 million years ago. This could mean that ceratopsians originated in North America and migrated to Asia rather than the reverse, paleontologists said. Doug Wolfe named the important new species of dinosaur Zuniceratops Christopher after his son. An expedition from the University of Alaska in Anchorage and Fairbanks has discovered a region in remote northern Alaska so rich in fossilized dinosaur tracks that team members dubbed it the "dinosaur epressway". The trampled area was found during the summer of 1998 on Alaska’s North Slope near the Brooks Range. The team found 13 new track sites and made casts from the prints of five different types of dinosaurs. The rock in which the prints were found dates to more than 100 million years ago, or about 25 million years older than the previously discovered signs of dinosaurs in the Arctic region. Paleontologists said that the new findings provide important evidence that dinosaurs migrated between Asia and North America during the early and mid -Cretaceous Period, before Asia split off into its own continent. Two rich fossil sites in the hills of Bolivia have been recently discovered, exciting paleontologists and dinosaur buffs. This discovery includes one of the most spectacular dinosaur trackways ever found. The discovery of a large site in the mountain region of Kila Kila in southern Bolivia was announced in early October. Here scientists found the tracks of at least two unknown species of dinosaur. These included a large quadruped dinosaur that was probably about 20m (about 70ft) long. The other site, located not far from the Bolivian city of Sucre, was uncovered in a cement quarry by workers several years ago but was not brought to paleontologists’ attention until the middle of 1998. The site features a vertical wall covered with thousands of dinosaur prints representing more than 100 different species. The tracks date back to between 65 million and 70 million years ago. Since dinosaurs are believed to have died out around 65 million years ago, the prints were likely made by some of the last dinosaurs on earth. Scientists speculated that the tracks were made at the edge of a lake or swamp and were then hardened and preserved. The rock containing the tracks was then pushed into a vertical position over millions of years of geologic activity. Dinosaur eggs have also been found at the site, which paleontologists are working to preserve before it falls victim to erosion. Paleontologists hope to study the site and learn about the diet and physical characteristics of the dinosaurs that are represented there. The discovery of a new type of ceratopsian dinosaur suggests ceratopsians ______.
[听力原文]8-10M: Hello, Lucy. This is Mac. How are youW: Fine, thank you. A bit too busy, though, you know, I’ m trying to put everything in order in my new apartment.M: Oh, I sec. Well, I was wondering if you’ d like to go to a concert tomorrow evening. I think it’ll be good. And if I remember correctly, you did say you like pop music.W: Yes, that’ s right. I do. It’ s nice of you to ask me, Mac. But I don’ t think I can. Margaret has already asked me to see a friend and then we’ll go to the cine ma together. In fact, she’ s getting the tickets this evening.M: Oh, well. Never mind. What about next weekend This concert is still on then, I think, if you’ re free next Saturday.W: Oh, I’ d tike to very much, but what time exactlyM: Well, it starts at 7:00 p.m., I think.W: Oh, good, that’ll be fine. The basketball match will be over by 5: 30, I’ m sure.M: Good, I’ll call you again when I get the tickers.W: Sure. Bye for now. When will the basketball match be over（）
I was born in Feb. 12,1809,in Hardin County, Kentucky. My parents were both born in Virginia, of undistinguished families--second families, perhaps I should say. My mother, who died in my tenth year, was of a family of the name of Hanks, some of whom now reside in Adams, and others in Macon countries, Illinois. My paternal grandfather, Abraham Lincoln, emigrated from Rockingham County, Virginia, to Kentucky, about 1781 or 1782, where, a year or two later, he was killed by Indians, not in battle, but by stealth, when he was laboring to open a farm in the forest. His ancestors, who were Quakers, went to Virginia from Berks County, Pennsylvania. An effort to identify them with the New - England family of the same name ended in nothing more definite, than a similarity of Christian names in both families, such as Enoch, Levi, Mordecei, Solomon, Abraham, and the like. My father, at the death of his father, was but six years of age, and he grew up, literally without education. He removed from Kentucky to what is now Spencer County, Indiana, in my eighth year. We reached our new home about the time the State came in the Union. It was a wild region, with many bears and other wild animals still in the woods. There I grew up. There were some schools, so-called, but no qualification was ever required of a teacher, beyond "reading, writing, and ciphering" to the Rule of Three. If a struggler supposed to understand Latin, happened to sojourn in the neighborhood, he was looked upon as a wizzard. There was absolutely nothing to excite ambition for education. Of course when I came of age I did not know much. Still somehow, I could read, write, and cipher to the Rule of Three, but that was all. I have not been to school since. The little advance I now have upon this store of education, I have picked up from time to time under the pressure of necessity. I was raised to farm work, which I continued till I was twenty-two. At twenty-one I came to Illinois, and passed the first year in Illinois--Macon County. Then I got to New-Salem( at that time in Sangamon, now in Menard County), where I remained a year as a sort of clerk in a store. Then came the Black-Hawk War; and I was elected a Captain of volunteers--a success which gave me more pleasure than any I have had since. I went the campaign ,was elated, ran for the Legislature the same year (1832) and was beaten--the only time I have been beaten by the people. The next, and three succeeding biennial elections, I was elected to the Legislature. I was not a candidate afterwards. During this legislative period I had studied law, and removed to Springfield to practice it. In 1846, I was once elected to the Lower House of Congress. Was not a candidate for reelection From 1849 to 1854, both inclusive, practiced law more assiduously than ever before. Always a Whig in politics, and generally on the Whig electoral tickets, making active canvasses. I was losing interest in politics, when the repeal of the Missouri Compromise aroused me again. What I have done since then is pretty well-known. If any personal description of us is thought desirable, it may be said, I am, in height, six feet four inches, nearly; lean in flesh, weighing on an average, one hundred and eighty pounds; dark complexion, with coarse black hair, and grey hair, grey eyes--no other masks or brands recollected. The general tone of this passage can be described as ______.
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