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皮损为半球形丘疹，中央有脐窝，表面有蜡样光泽
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M: What are you looking forW: We’re studying the basic structure of molecules.M: Just any molecules There are quite a few of them!W: Yes, far too many. We’re only working with certain molecules that contain carbon and hydrogen.M: What do you expect to learn from thatW: We’re trying to see the kinds of carbon molecules in which we can use silicon as a substitute.M: What difference would that makeW: Silicon has a lot of the same properties as carbon, hut it’s much more common than carbon.M: Oh, I see. What is the woman studying().
70岁男患者，尿频，进行性排尿困难，尿线细，直肠指诊前列腺如鸡蛋大小，中央沟变平，应诊断为
Up to now, we’ve focused on the positive impact of the automobile on society in the United States. Today we’ll look at some of the negative effects. A number of sociologists blame the automobile for the decline of the downtown areas of major cities. In the 1950’s and 1960’s,the automobile made it possible to work in the city and yet live in the suburbs many miles away. Shopping patterns changed. Instead of patronizing downtown stores, people in the suburbs went to large shopping malls built in the open areas outside the cities, where everything is cheaper. Merchants in the city failed. stores closed. Downtown shopping areas became deserted. In recent years, there has been a rebirth for a number of downtown areas, as suburb especially young married couples, have moved into the city to avoid road clogged with traffic between the suburbs and cities every morning and evening. Now let’s look at some slides that illustrate these trends. By the way, tomorrow I’ll explain the effect of all these automobiles on the environment, for example, what happens to the atmosphere as a result of burning gasoline and depletion of natural resources like fossil fuels What did the speaker probably talk about previously().
国家标准《计算机软件产品开发文件编制指南GB8567—88》中规定，一项软件开发过程一般地说应该产生14种文件，其中管理人员主要使用的有 (1) 、 (2) 、 (3) 、开发进度月报、项目开发总结报告。开发人员主要使用的有 (1) 、 (2) 、 (4) 、数据要求说明书、概要设计说明书、详细设计说明书、数据库设计说明书、测试计划和 (5) 。维护人员主要使用的有设计说明书、 (5) 和 (3) 。 3（）
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