问答题Directions: Fenghua is one of your good friends and schoolmates. He has been addicted to smoking for a long time2 During a lecture this week, you learned a lot about great dangers involved in heavy smoking, and now you decide to write a letter to him. Your letter should be based on the following outline. 1) your concern about his health, 2) and your advice and suggestions. Write your letter in no less than 100 words. Write it neatly on ANSWER SHEET 2. Do not sign your own name at the end of the letter, use "Li Ming" instead. Do not write the address.

问答题(46) For centuries the smoking of tobacco in cigarettes, cigars, and pipes has produced controversy over possible health hazards, but only since the 1950's has sufficient scientific evidence accumulated to make possible a thorough evaluation of the health risk. Scientific investigation of the relationship of smoking and health gained impetus after the beginning of the 20th century, then an increase in lung cancer was noted. As the use of tobacco increased, studies improved. (47) Although some gaps in knowledge still exist, the information now available is sufficient to permit making sound judgments, based on the converging lines of evidence. (48) Investigators have directed their principal consideration to cigarette smoking because the health consequences attributed to it far exceed those due to smoking cigars and pipes. The widespread popularity of cigarettes is comparatively recent in man's use of tobacco. The smoking pattern began to change at the beginning of the 20th century. Since then, cigarettes have steadily become more popular than cigars and pipes. (49) In the United States. per capita cigarette consumption — calculated for all persons 15 years of age and older, regardless of whether they smoked—rose from 49 per year in 1900 to 3,888 in 1960. Per capita consumption of cigars, pipe tobacco, and chewing tobacco declined sharply in the same period. Data presented in 1966 indicated a sharp reduction in cigarette smoking in the United States for men under the age of 55 with the trend continuing to 1970. Further increase in cigarette consumption for women of all ages was reported in 1966 and no further increase was noted 1966 and 1970. However, in 1970 overall per capita cigarette consumption rose. By 1962 the Royal College of Physicians of London reported:" Cigarette smoking is a cause of lung cancer and bronchitis, and various other less common diseases. It delays healing of gastric and duodenal ulcers." Some scientists, however, expressed dissenting opinions. The most widely publicized report in the United States was issued in 1964 by the Surgeon General's Advisory Committee on Smoking and Health. (50) The principal judgment in the committee's 150,000-word report was: "Cigarette smoking is a health hazard of sufficient importance in the United States to warrant appropriate remedial action." The smokers of pipes and cigars were found to incur less health risk. However, the incidence of cancer and heart disease among them was found to be greater than among nonsmokers.

问答题简述按类别举例常用抗心绞痛的药物，并说明各类药物的作用机制。

问答题试述泌尿系局部对尿路感染防御机制。

问答题简述肾小管调节机体酸碱平衡机制。

问答题You want to invite Susan to a party. Write an invitation letter to her, elaborating on the reason why such a party should be held and what activities will be arranged for them. Do not sign your own name at the end of the letter. Use "Li Ming" instead. Do not write the address.

问答题You are a salesman in a pharmacy company. Write a letter to Mr. Wang, one of your customers, to introduce a new medicine to him. Do not sign your own name at the end of the letter. Use "Li Ming" instead. Do not write the address.

问答题慢性肾衰竭分几个阶段?如何划分这几个阶段?透析前慢性肾衰竭病人的处理原则有哪些?慢性肾衰竭病人血透治疗的指征是什么?

问答题简述肾病综合征常见的病理类型及其临床表现特点。

问答题引起肾病综合征的主要继发性肾小球疾病有哪些?

问答题People today all over the world are beginning to hear and learn more and more about the problem of pollution. (46) Pollution is caused by either the release by man of completely new and often artificial substances into the environment, or by releasing greatly increased amounts of a natural substance, such as oil from oil tankers into the sea. (47)The whole industrial process which makes many of the goods and machines we need and use in our daily lives, is bound to create a number of waste products which upset the environmental balance, or the ecological balance as it is also known. (48) Many of these waste products can be prevented or disposed of sensibly, but clearly while more and more new goods are produced and made complex, there will be new, dangerous wastes to be disposed of, for example, the waste products from nuclear power stations. (49)Whatever its underlying reasons, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the home there is an obvious need to control litter and waste. Food comes wrapped up three or four times in packages that all have to be disposed of; drinks are increasingly sold in bottles or tins which cannot be reused. This not only causes a litter problem, but also is a great waste of resources, in terms of glass, metals and paper. Advertising helped this process by persuading many of us not only to buy things we neither want nor need, but also to throw away much of what we do buy. (50)Pollution and waste combine to be a problem every one can help to solve by cutting out unnecessary buying, excess consumption and careless disposal of the products we use in our daily lives.

问答题One thing that distinguishes the online world from the real one is that it is very easy to find things. To find a copy of The Economist in print, one has to go to a newsstand, which may or may not carry it. Finding it online, though, is a different proposition. Just go to Google, type it in" economist" and you will be instantly directed to economist.com. (46) Indeed, until Google, now the world's most popular search engine, came on to the scene in September 1998, searching online was a hit-or-miss affair. Google was vastly better than anything that had come before: so much better, in fact, that it changed the way many people use the web. (47) Almost overnight, it made the web far more useful, particularly for non-specialist users, many of whom regard Google as the Internet's front door. It's now a worldwide phenomenon. Not only has it made the Internet into an extremely fast and valuable research tool, it's become a common word and has even created a new verb" to google." (48)The recent fuss over Google's stock market flotation obscures its far wider social significance: few technologies, after all, are so influential that their names have become a household verb such as the cloning technology creates the verb" to clone". Google began in 1998 as an academic research project by Sergey Brin and Lawrence Page, who were then graduate students at Stanford University in Palo Alto, California. It was not the first search engine, of course. (49) Existing search engines were able to scan a large portion of the web, build an index, and then find pages that matched particular words, but were less good at presenting those pages, which might number in the hundreds of thousands, in a useful way. Mr. Brin's and Mr. Page's accomplishment was to devise a way to sort the results by determining which pages were likely to be most relevant. They did so by using a mathematical program, called PageRank. (50) This program is at the heart of Google's success, distinguishing it from all search engines and accounting for its apparently magical ability to find the most useful web pages. With this powerful ability. Google distinguished itself from among all the search engines and became an established standing research tool in the online world.

问答题白血病

问答题原发性肥厚型心肌病病理改变有哪些特点?

问答题Directions:Writeacompositionaccordingtothefollowingpictureandrequirements.A.Title:GoodMannersB.Wordlimit:160～200words.Outline:(1)Describethepicture.(2)Similarsituationsinotheraspectsofdailylife.(3)Yourcomments.

问答题There's a human liver sitting in a lab dish in Madison, Wis. Also a heart, a brain and every bone in the human body even though the contents of the dish are a few cells too small to be seen without a microscope. But these are stem cells, the most immature human cells ever discovered, taken from embryos before they had decided upon their career path in the body. (46) If scientists could only figure out how to give them just the right kick in just the right direction, each could become a liver, a heart, a brain or a bone. (47) When a team from the University of Wisconsin announced their discovery, doctors around the world looked forward to a new era of medicine one without organ-donor shortages or the tissues-rejection problems that bedevil transplant patients today. Doctors also saw obstacles, though. One of them was a U. S. Congress skittish about research on stem cells taken from unwanted human embryos and aborted fetuses. Indeed, 70 lawmakers asked in a firmly worded letter that the Federal Government ban all such work. Yet the era of "grow your own" organs is already upon us, as researchers have sidestepped the stem cell controversy by making clever use of ordinary cells. Today a machinist in Massachusetts is using his own cells to grow a new thumb after he lost part of his chest wall in an accident. A teenager born without half of his chest wall is growing a new cage of bone and cartilage within his chest cavity. Scientists announced that bladders, grown from bladder cells in a lab, have been implanted in dogs and are working. Meanwhile, patches of skin, the first "tissue-engineered" organ to be approved by the U. S. Food and Drug Administration, are healing sores and skin ulcers on hundreds of patients across the U. S. How have scientists managed to do all this without those protean stem cells? Part of the answer is smart engineering. (48) Using materials such as polymers with pores no wider than a toothbrush bristle, researchers have learned to sculpt scaffolds in shapes into which cells can settle. The other part of the answer is just plain cell biology. (49) Scientists have discovered that they don't have to teach old cells new tricks; given the right framework and the right nutrients, cells will organize themselves into real tissues as the scaffolds dissolve. "I'm a great believer in the cells. They're not just lying there, looking stupidly at each other," says Francois Auger, an infectious disease specialist and builder of artificial blood vessels at Laval University in Quebec City. "They will do the work for you if you treat them right." Replacement hearts—or even replacement heart parts—are at least a decade off, estimates Kiki Hellman, who monitors tissue-engineering efforts for the FDA. "Any problem that requires lots of cell types 'talking' to one another is really hard," she notes. Bone and cartilage efforts are much closer to fruition, and could be ready for human trials within two years. (50) And what of those magical stem cells that can grow into any organ you happen to need—if the law and biologists' knowledge permit? "Using them," says Sefton, "is really the Holy Grail./

问答题室上性心动过速主要包括哪几种?试阐明阵发性室上性心动过速的发病机制?特点及发作期的处理?

问答题Directions: Suppose you have a friend, Paul, who is about to attend college. He wants you to advise him on which subject to major in—history, in which he is very interested, or computer science, which offers a better job prospect. You should write a letter to tell him your suggestion. Write your letter in no less than 100 words. Write it neatly on ANSWER SHEET 2. Do not sign your own name at the end of the letter; use " Li Ming " instead. Do not write the address.

问答题简述急性心肌梗死溶栓疗法的机理、药物分类、适应证、禁忌证以及疗效判断指标。

问答题Directions:Writeanessayofabout160-200wordsbasedonthefollowingdrawing.Inthisessay,youshould:1)describethepicturesbriefly,2)interpretthemeaning,and3)giveyourcomment.