名词解释题
等价类
发布日期：2020-12-11
试题解析
等价类质同像
等价类质同像是电价相等的离子进行置换所形成的类质同像。
无效等价类
无效等价类和有效等价类相反，无效等价类是指对于软件规格说明而言，没有意义的、不合理的输入数据集合。利用无效等价类，可以找出程序异常说明情况，检查程序的功能和性能的实现是否有不符合规格说明要求的地方。
- 中文名
- 无效等价类
- 外文名
- Invalid equivalent class
闭路同伦类
闭路同伦类是闭路的一种等价类。
- 中文名
- 闭路同伦类
- 所属学科
- 同伦论
- 外文名
- homotopic class of loops
标签： 等价
题王网让考试变得更简单
扫码关注题王，更多免费功能准备上线！
此试题出现在
Practice 1 You should spend about 20 minutes on this task. The diagram below shows a process that organic waste turn into garden fertiliser. Write a report for a university teacher describing the information shown below. You should write at least 150 words.
Today ,as in every other day of the year ,more than 3000 U.S. adlescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime,it can be expected that of these 3000 about 23 will be murdered,30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweithts all other factors, whether voluntary or involuntary, as a cause of death. Since the late 1970s, when daily smoking among high school seniors reached 30 precent , smoking rates among youth have declined . While the decline is impressive ,several important issues must be raised. First, in the past several years,smoking rates among youth have declined very little. Second,in the late 1970s ,smoking among male high school seniors exceeded that among female by nearly 10 percent . The statistic is reversing.Third ,several recent studies have indicate high school dropouts have excessively high smoking rates, as much as 75 percent . Finally, thouth significant declines in adolescent smoking have occurred in the past decade,no definite reasons for the decline exist. Within this context,the Naional Cancer Instiute (NCI) began its current effort to determine the most effecive measures to reduce smoking levesl among youth. According to the author, the deaths among youth are mainly caused by （）.
患者，男性，17岁，接触油漆后喘息1天，伴少量白痰，有过敏性鼻炎史2年，查体：双肺广泛哮鸣音，诊为支气管哮喘急性发作，经治疗后缓解出院，护士为其进行健康教育时应指出其可能的激发因素是（）
简述人力资源的特点。
某国有企业被依法宣告破产,该企业的下列财产中,属于破产财产的有:（ ）
一级检修限度，轮对踏面剥离一处，长度≤（）mm，踏面剥离二处，长度≤10mm。
转化
不属于类固醇激素的是（）
某施工单位承包一机电工程施工项目，工程内容包括工艺热力管道安装和一座钢结构框架安装。合同规定，钢材等主材由建设单位供货。施工单位安排由该单位的甲、乙两个施工队分别承担施工任务。施工中发生如下事件： 事件一：在工程中期进度质量大检查中，发现承担钢结构框架安装的乙施工队进度滞后严重，且存在材料、配件错用的情况。乙施工队作业人员回忆：乙队进场较晚，领料时领取了项目部库存所剩有的与框架钢结构施工相关的型钢和配件，发现规格型号不全，但材料库已经没有余料。材料管理员告知，材料被甲队全部领走。检查到甲队在管架预制完成后还剩余了大量材料。项目部材料供应部门将甲队剩余的余料调剂到乙队，乙队材料仍然有缺口，处于间歇停工待料状态。乙队为赶上进度，使用了部分甲队剩余的无标识配件和螺栓，导致图纸要求的合金连接螺栓多处用成普通碳钢螺栓。经查，甲、乙两队均未向项目部材料供应部门报送材料需用计划。 事件二：工艺热力管道组焊完成、水压试验前进行质量检查，发现：管道的主材（钢管）没有生产厂家的材质证明和出厂合格证，也没有进行过其他检查、检验的记录。据施工作业人员回忆：钢管由建设单位供应，工程当时由于材料供应滞后，已经影响到进度。 钢管到现场时没有出厂合格证，建设单位负责材料供应的人员表示，材料质量由建设单位 负责，先施工，合格证后补。施工单位因为是建设单位供应的材料，就没有进行其他检验，直接进行了施工，组焊完成后也无人落实合格证的事项。 从事件一中说明施工单位甲工程队在领取材料和材料管理中有哪些错误做法？应该怎么做才是正确的？
营改增试点企业按差额计算销售额时，允许扣减销售额而减少的销项税额应通过“应交税费——应交增值税”下的三级专栏（）进行核算。
暂无相关推荐~