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.

问答题简单介绍治疗支气管哮喘各类药物特点和临床使用方法，每类药以一个药代表。

问答题简述肝性脑病的临床分期。

问答题心室纤颤前有哪些预兆?

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.

A.出血坏死型胰腺炎 B.隐性心肌梗死 C.两者都是 D.两者都不是

A.中毒性结肠扩张 B.肠梗阻 C.两者均是 D.两者均非

男性，67岁，慢性咳嗽，咳少量白痰，活动后气短3年，近2个月气短加重，痰量较多，为脓l生痰。查体：口唇轻度发绀，双下肺可闻及Velcro音，有杵状指。

A.腹膜透析 B.应用强的利尿剂 C.两者均可用 D.两者均不用

A.壁细胞 B.主细胞 C.黏液细胞 D.G细胞 E.肥大细胞

A.生物毒类中毒 B.乙二醇中毒 C.氯酸盐中毒 D.格鲁米特(导眠能)中毒 E.短效巴比妥类中毒

A.依地酸二钠钙 B.亚甲蓝 C.二巯基丁二酸 D.氟马西尼 E.纳洛酮

判断题中度蛋白尿的急性链球菌感染后肾炎（ ）

判断题CVP的测定有助于鉴别心功能不全或血容量不足引起的休克。

判断题肾病综合征早期（ ）

多选题慢性阻塞性肺疾病的发生与下列哪些因素有关

多选题关于阵发性夜间呼吸困难发生的可能机制，下列正确的

多选题稳定型心绞痛患者发作时的典型体征可有

多选题慢性阻塞性肺疾病呼酸时，下列哪些药物能使用（ ）

多选题诱发吸入性肺脓肿的因素包括