主页
学科
搜索
账户
常见问题
当前学科:M6维护技术基础
题目:
单选
下列哪种原因是晶间腐蚀产生的主要原因()。
A . 结构应力
B . 热处理不当
C . 在去应力退火过程中,钢不发生相变,残余应力主要是在加温中消除的
D . 组织成份不均
答案:
<查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索
推荐知识点:
踝背屈的主动肌是()
During initial days of computing, software was largely developed by small groups of people. When this software was to be maintained by another set of people, it used to be a nightmarish experience. When large commercial projects were to be handled, it used to be analmost impossible task to keep the time and budget under control, and projects used to get delayed and many projects were abandoned halfway. There was no systematic procedure forthe software development; everything was done on ad hoc basis. This ad hoc approach led tothe 'software crisis'.Over the last few decades there has been a tremendous growth in information technologyand its impact on everyday life. Complex software systems have become critical to theoperation of many systems in areas such as banking, communications, manufacturing,power generation, and transportation. Progress in computer science and accumulated experience with industrial production of software have led to the emergence of software engineering as a separate discipline. The software engineering discipline has been defined as"the application of systematic, disciplined, quantifiable approaches to the development,operation, and maintenance of software. " that is, the application of engineering to software .The computer science discipline concerns with developing large applications. Software engineering covers not only the technical aspects of building software systems, but also management issues, such as directing programming teams, scheduling, and budgeting.For developing a software product, the development process is divided into differentstages. A convenient way of splitting the whole process is to divide the development into thefollowing five stages:Requirements Analysis & Specification: define the system requirements in detailDesign: specify system architecture and modules in detailCoding: produce source codeTesting: deal with unit testing and system testingMaintenance: fix bugs, enhance features and adapt across platforms.{二)Tell whether the following statements are true (T ) or false ( F) according to the passage A.(根据上立的内容判断下列句子的正误。 )36. During initial days of the development of software, everything was done in discipline. ( )37. The definition of software engineering is "the application of systematic, disciplined,quantifiable approaches to the development, operation, and maintenance of software. " ( )38. For developing a software product, you need design, coding and testing. ( )39. software engineering is the application of engineering to software. ( )40. Software engineering only covers the technical aspects of building software systems. ( ) .
明煅法应煅至药物红透、质地酥脆为度。
患者男,35岁,因“体检发现左输尿管上段结石1周”来诊。患者1周前体检时检查泌尿系统B型超声发现左输尿管上段结石,长径约1cm。平时无明显症状,偶尔有左腰部酸胀不适感。既往体健,无排石史。为明确诊断应进行的检查是()。
从2001年1月向联合国东帝汶任务区派遣首批15名维和警察,到自2004年向海地陆续派出了8支维和警队,十年间中国维和警察们舍生忘死,不辱使命,向祖国和人民交上了完美答卷,赢得了国际社会的高度赞誉,也让世界人民认识了发展的中国。这表明()
抢救急性敌百虫中毒者,清洗皮肤宜用()
2010年广州亚运会排球比赛中,我国男排获得第()名,以历史最差成绩尴尬收官亚运会。
跌水多用于跌差小于()的陡坎处。
典型急性菌痢的临床症状是()
()一般是是指与评价对象的利益密切相关,关心评价对象业绩状况的相关利益人。