电大中央广播电视大学期末复习机械专业机械CADCAM试题及参考答案小抄参考

上传人:1666****666 文档编号:37351802 上传时间:2021-11-02 格式:DOC 页数:5 大小:114.12KB
返回 下载 相关 举报
电大中央广播电视大学期末复习机械专业机械CADCAM试题及参考答案小抄参考_第1页
第1页 / 共5页
电大中央广播电视大学期末复习机械专业机械CADCAM试题及参考答案小抄参考_第2页
第2页 / 共5页
电大中央广播电视大学期末复习机械专业机械CADCAM试题及参考答案小抄参考_第3页
第3页 / 共5页
点击查看更多>>
资源描述
专业好文档第1题、填空1.图标菜单段标题固定为_,子菜单标题之下的第_项为图标菜单的标题,图标菜单只能通过_菜单或_菜单调用。 参考答案: (*IMAGE) (一) (屏幕) (下拉) 2.零件分类方法中的编码分类法可以细分为_法、_法和_法。 参考答案: (特征码位) (码位) (特征位码域) 3.数控机床的_环控制系统没有反馈测量系统,_环控制系统的测量元件装在丝杆或伺服马达端部,用来检测丝杆或伺服马达的回转角,间接测出机床运动部件的_,经反馈送回控制系统。 参考答案: (开) (半闭) (位移) 4.在零件分类方法中,生产流程分析法可以分为关键_法、顺序_法和_分析法。 参考答案: (机床) (分枝) (聚类) 5.若数学表达示为X=a*b/5,则其AutoLISP语言的表达形式为:(setq_),式中命令setq的含义为给变量X_ 参考答案: X(/(*a b)5) 赋值6.一般树的每一个结点可以有_个子树,在二叉树中每个结点的子树不能超过_个,而且二叉树中的子树有_之分,其次序不以颠倒。参考答案: (任意多) (二) (左右)7.数控机床的坐标系统分为两种:_坐标系统和_坐标系统。 参考答案: (绝对) (增量)8.CAPP系统按其工作原理可以分为三种基本类型分别是_式、_式和_式。参考答案: (检索) (派生) (创成)9.AutoLISP语言使用的数值型数据有_数和_数两类。 参考案: (整型) (实型)10.数据库中的数据模型一般分为三种,它们是_型、_型和_型。 参考答案: (层次) (网络) (关系)11.柔性制造系统是由_系统、_系统和_系统三大部分组成的。 参考答案: (加工) (物流) (信息)第2题、单项选择题1.在数控机床CNC系统的组成中,核心部分为( )。A 输入输出设备BCNC装置C PLCD伺服机构 参考答案: B2.(*20(-5 2)的运行结果为( )。A10B30C60D50参考答案: C3.在CIMS中,物料需求计划简称为( )。AMRPBMAP1.0CMRP-DMRP-参考答案: A4.(*20(+5 2)的运行结果为( )。A10 B60C140D100参考答案: C 5.下述CAD/CAM过程的操作中,属于CAD的范畴的是( )。ACAPPBCIMSCFMSD几何造型参考答案: D 6.在对话框结构中,按钮开关为( )。AtoggleBbuttonCimageDslider 参考答案: B 7.下述CAD/CAM过程的操作中,属于CAM的范畴的是( )。A优化设计 BCAEC数控加工 D几何造型参考答案: C8.线性表的顺序存储结构适合于存储的数据是( )。A设计结果数据B数据元素长度不同的数据C中间结果数据D工程手册中的数据表 参考答案: D9.AutoCAD绘图软件的菜单中常用的两种菜单是( )。A下拉菜单和图标菜单B下拉菜单和图形输入板菜单C屏幕菜单和图形输入板菜单D按钮菜单和图标菜单 参考答案: A10.在派生式CAPP系统中利用分类编码进行零件分类成组的主要依据是( )。A零件的材料B物征矩阵C典型工艺D零件的种类参考答案: B 11. FMS的管理控制系统的必备软件模块中不包括( )。A接口模块B系统管理程序模块C网络模块D调度模块 答案: C 12.语句(substr(“AutoCAD2 3)的执行结果是( )。AAutBCADCOcdDuto参考答案: D13.在对话框构件中,滚动条构件为( )。AbuttonBtoggleCimageDslider参考答案: D14.在AutoLISP中,(car(list x y z)的运算结果为( )。AX By Cz D(y z)参考答案: B 15.语句(max2.1 3.4 5 12.6)的执行结果是( )。A 2.1B3.4C5D12.6参考答案: D16.二叉树的遍历方式中,先左后右的方式不包括是( )。ADLR BLDRCRLDDLRD参考答案: C17.决策表又叫判定表,其中不包括( )。A分类B结构C性能D决策 参考答案: D 18.(*20(6 2)的运行结果为( )。A12B24C32D80 参考答案: D19.CIMS系统的构成有六个部分系统,但不是指()。A 信息管理系统B工程设计系统CCAD软件系统D制造自动化系统参考答案: C20.FMS的管理控制系统必需具备的部分中不包括( )。A中央处理装置B工件装卸工作站C程序装置D显示控制装置 参考答案: B21.弹出表(Popup_list)包括五个属性,下列不属于它的属性是( )。AlabelBvalueClistDallow 参考答案: D22.编辑框(Edit_box)包括五个属性,下列不属于编辑框的属性是( )。AlabelBallow_acceptClistDedit_width 参考答案: C23. 决策树又叫判定树,它不包括()。A. 根B. 干 C. 分枝 D. 节点 参考答案: B第3题、简答题1.简述OPITZ系统第二个横向分类环节至第五个横向分类环节中有关回转体类零件部分的结构。 参考答案: 对于无变异的正规回转体类零件,则按外部形状内部形状平面加工辅助孔、齿形和成形加工这样的顺序细分。对于有变异的非正规回转体零件,则按外部形状回转加工平面加工辅助孔、齿形和成形加工的顺序细分。2.指出数控加工中的绝对坐标系统和相对坐标系统的主要不同点。参考答案: 绝对坐标方式就是系统中所有运动命令都涉及到某一个基准点或叫做零点,给出的位置命令是对零点的绝对距离。增量坐标方式是指一个指令的基准点就是前一项操作的终点,每一个尺寸数据都用作系统的距离增量。3.简述图标菜单的主要特点。 参考答案: 图标菜单段标题固定为*IMAGE,子菜单标题之下的第一项为图标菜单的标题,图标菜单只能通过屏幕菜单或下拉菜单调用。4.CAD/CAM硬件系统的基本功能是什么? 参考答案: 1)快速计算和生成图形; 2)存储大量程序、信息及快速检索; 3)人机交互通讯的操作功能; 4)输入、输出图形及信息。5.简述在单向链表的第8个元素前插入一个数据的过程。 参考答案: 需先为第8个数据元素申请一个存储空间,得到一个新结点;找到第7个结点;将第7个结点的指针指向这个新结点的地址;再将这个新结点的指针指向第8个结点的地址。6.简述决策表的结构和作用。 参考答案: 决策表的结构:决策表是用符号描述事件之间逻辑关系的一种表格;它用双线和粗线将表格划分成四个区域;其中左上方列出所有条件,左下方列出根据条件组合可能出现的所有动作,双线右侧为一个矩阵,其中上方为条件组合,下方为对应的决策动作。矩阵的每一列可看成是一条决策规则。决策表的作用:是用表格结构来描述和处理“条件”和“动作”之间的关系和方法 7.分组技术,是现代化生产的基本内容,请简述顺序分技法原理及其工艺过程编码的三项基本规定。参考答案: 顺序分技法是按照全部零件的工艺过程逐个判别,实质归属相应的各级分枝组。三个基本规定: 1)若采用机床代码,规格相近的同类型机床用同一代码,同类机床用于不同性质加工工序应采用不同代码; 2)同一工艺过程中有若干工序使用相同代码,仅对最先工艺编码; 3)不需要特殊设备或采用低廉设备的辅助工序可以不予编码。 8.简述的四个意义?参考答案: 1)代替了手工劳动; 2)提高了设计质量; 3)设计周期短、效率高; 4)有利于计算机集成制造。 If we dont do that it will go on and go on. We have to stop it; we need the courage to do it.His comments came hours after Fifa vice-president Jeffrey Webb - also in London for the FAs celebrations - said he wanted to meet Ivory Coast international Toure to discuss his complaint.CSKA general director Roman Babaev says the matter has been exaggerated by the Ivorian and the British media.Blatter, 77, said: It has been decided by the Fifa congress that it is a nonsense for racism to be dealt with with fines. You can always find money from somebody to pay them.It is a nonsense to have matches played without spectators because it is against the spirit of football and against the visiting team. It is all nonsense.We can do something better to fight racism and discrimination.This is one of the villains we have today in our game. But it is only with harsh sanctions that racism and discrimination can be washed out of football.The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anniversary celebrations and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary proceedings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunda.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, hell be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end.Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him completely.If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes its not needed. Instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds.Even if everything goes as planned, it wont. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause there第 5 页 共 5 页
展开阅读全文
相关资源
相关搜索

最新文档


当前位置:首页 > 其他分类


copyright@ 2023-2025  zhuangpeitu.com 装配图网版权所有   联系电话:18123376007

备案号:ICP2024067431-1 川公网安备51140202000466号


本站为文档C2C交易模式,即用户上传的文档直接被用户下载,本站只是中间服务平台,本站所有文档下载所得的收益归上传人(含作者)所有。装配图网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。若文档所含内容侵犯了您的版权或隐私,请立即通知装配图网,我们立即给予删除!