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作者2023-07-14 04:08:05建筑工程题库 78 ℃

世界上第一台工业机器人是由()制造的。

世界上第一台工业机器人,命名为()

()年,机械与铸造公司制造出了世界第一台圆柱坐标型工业机器人。

日本第一台机器人由川崎重工开发的()机器人。

我国工业机器人起步于上世纪 ()年代。

下列()项不属于服务机器人的工作。

工业机器人是指面向()的多关节机械手或多自由度的机器装置。

下列()项不属于服务机器人。

下列()项不属于工业机器人的工作。

工业机器人“尤尼曼特”是由()生产的。

工业机器人首先应用于运输行业。

加工机器人,可以把机器人的终端执行器变为具有铣削、钻削、雕刻等功能的主轴系统,这样就使机器人成为机加工机床。

并联机器人是指一个轴运动不影响另一个轴的坐标原点的机器人,比如蜘蛛机器人。

串联机器人是指一个轴的运动会改变另一个轴的坐标原点的工业机器人,比如六关节机器人。

服务机器人是一种半自主或全自主工作的机器人,也包括从事生产的设备。

工业机器人按执行机构运动的控制机能,可分点位型和连续轨迹型。

对于工业机器人的分类,国际上还没有统一的标准。

目前,智能清洁机器人已经可以完全代替人工完成家庭清洁任务。

某些智能清洁机器人具备免碰撞感应系统、自救防卡死功能、自主导航路径规划等功能。

机器人(robot)是自动执行工作的机器装置。

家用机器人主要工作不包括( )。

不属于清洁机器人功能的是( )。

关于家用机器人,下列说法错误的是( )。

下列不属于医用机器人的是( )。

达芬奇手术机器人主要用于( )。

手术机器人的机器臂进入患者体内时,必须携带( )。

vex iq 教育机器人的材质主要采用( )材质,适合8-13岁的小学生、初中生入门学习。

vex edr教育机器人适合于( )学习。

通过对教育机器人程序的编写,能够培养( ),提高空间想象力。

教育机器人是以( )为目标的。

达芬奇的机器臂能让手术变得更为精准,特别是对精细部位的操作,更容易完成开腹手术和腔镜手术。

所有的教育机器人均不提供二次开发平台。

使用达芬奇手术机器人,医生可以在距离手术床3米远的操作台上进行手术。

对于教育机器人的学习,能够通过自己动手搭建、编程、调试、操作、运行培养孩子的动手能力。

达芬奇机器人是由外科医生控制台、床旁机械臂系统、成像系统和手术器物盛装台四部分组成。

清洗马桶的机器人,能根据需要自动调节高度,完成工作后,它会通过高温烘烤的方式将马桶壁烘干消毒。

长期不使用家用机器人时,要将电源线从插座上拔下,取出电池并整理好,收藏在干燥的地方。

现在的擦窗机器人主要有真空吸盘吸附和风机吸附两种。

智能家居是家用机器人未来的发展趋势。

扫地机器人,一般采用刷扫和大功率吹风方式,来完成地面清理工作。

robi机器人在步行方面,采用了( )公司所开发的无腰部关节步行专利技术「shin-walk」。

机器人“hrp-4c”,利用( )技术,通过电脑合成歌唱声音,就如同在模仿真正歌手的歌声一般。

优必选alpha 2机器人,由( )个专利伺服舵机构成,能像人一样行动自如。

现在竞技机器人主要有国际机器人奥林匹克竞赛和( )两大赛事。

nao机器人利用一个( ),可以保持在移动模式下的平稳。

乒乓球对打的机器人“forpheus”,能以( )的速度测算出对手的位置、球的旋转和速度。

波士顿动力公司的人形机器人atlas,通过头上的( )和立体摄像机可以使atlas规避障碍物、探测地面状况以及完成巡航任务。

yape快递机器人是一款全自动快递机器人,使用了( )技术收发货物,可以在无人监控的情况下,将快递准确的送达。

自动泊车机器人主要采用激光导航和( )技术来完成泊车工作。

港口运输机器人,可以达到每次定点停车误差不超过( )。

以后车主只需将车停在一个平台上,并在仓门处确认好车主信息,接下来的工作将由泊车机器人完成。

运输机器人可以提高生产过程的自动化程度并提高效率、改善劳动条件避免人身事故。

港口运输机器人,在众多引导车一起工作的时候,它们必须通过人工引导调整最佳路线。

atlas机器人是一种全液压驱动的人形机器人。

nao机器人完全由内置软件系统自动运作,没有外界控制,也没有人和电脑控制。

表演机器人的基本功能主要是使用超级ai技术、超绚声光技术、可视通话技术等。

优必选alpha 2机器人自带语wifi、蓝牙模块,但尚不可实现语音操作。

目前的表演机器人可以做到体形和真人大小相当,肤色与人类相近,但尚不能模仿出人类歌手的面部表情。

nao机器人动作灵活,还可以靠激光雷达传感器探测并绕过障碍物。

表演机器人是以供人观赏、娱乐为目的,可以像人,像某种动物,或小说中的人物,它可以走、跑、跳、会说话、会唱歌。

爬壁机器人常见吸附方式有( )和永磁吸附两种。

( )不是消防机器人的主要特点。

( )不是排爆机器人的主要特点。

爬壁机器人必须具备( )和移动两个基本功能。

排爆机器人主要应用于公安武警部门侦查、消防、( )、矿业等领域。

爬揽检修机器人的优点是可以( ),并且提高了工作效率。

电力挂轨式巡检机器人,可以沿着轨道倒挂行走,采用( )方式充电。

电力轮式巡检机器人,它主要有两大功能,一是( ),二是图像识别。

高压电线巡检机器人工作效率非常高,在水平导线上的行驶速度可以达到每分钟( )米。

( )不是安保机器人具备的功能。

爬壁机器人很适合在高大建筑外立面进行监控侦测。

军用机器人“大狗”,越野能力极强,可以翻山越岭。

采用负压吸附方式的爬壁机器人在部分壁面材料上是不能工作的。

消防机器人不仅能代替消防救援人员进入危险场所,还可以在灾害事故现场进行数据采集、处理、反馈。

常见的维护机器人主要有高压电线巡检机器人、电力巡检机器人、风电爬杆维护机器人、管道维护机器人、桥梁爬揽检修机器人等。

轮毂式管道机器人可以通过更换部件来执行多种清理及检测任务,如障碍物清理、管壁打磨钻孔等。

电力轮式巡检机器人可对设备表计、油位、油温、位置进行识别,判断设备状态是否异常。

高压电线巡检机器人可以在不切断电路的情况下通过远程操纵,近距离的检查电线。

安保机器人可以实时展示温度,湿度,烟感等环境参数,并且进行语音播报。但不能识别语音指令。

安保机器人进行人脸识别时,必须使人处于静态时才可完成识别。

喷涂机器人是可进行自动喷漆或喷涂其他涂料的工业机器人,( )年由挪威trallfa公司(后并入abb集团)发明。

焊接机器人的外围设备不包括(a)

使用一台通用机器人,要在作业时能自动更换不同的末端操作器,就需要配置( )。

弧焊机器人属于自动作业的工业机器人,其末端持握的工具是( )。

焊接机器人基本上属于( )。

焊接机器人工作站按工作性质可以分为箱体焊接机器人工作站、( )、轴类焊接机器人工作站和工作站的水下焊接上的应用等。

( )年,上海交通大学机器人研究所完成了“上海一号”弧焊机器人的研究,这是自主研制的第一台6自由度关节机器人。

焊接机器人诞生于上世纪( )年代。

( )年,第一台弧焊机器人在日本投入运行。

装配机器人是柔性自动化装配系统的核心设备,由机器人操作机、控制器、( )和传感系统组成。

喷涂机器人可分为有气喷涂机器人和无气喷涂机器人。

喷涂机器人是可进行自动喷漆或喷涂其他涂料的工业机器人。

喷涂机器人广泛用于汽车、仪表、电器、喷釉等工艺生产部门。

焊接机器人主要用于汽车车身焊接、汽车零部件焊接、管材焊接、箱体焊接等。

点焊机器人主要由操作机、控制系统和点焊焊接系统等组成。

目前焊接机器人中运用较为普遍的主要有点焊机器人、弧焊机器人和激光焊机器人。

焊接机器人是集机械、计算机、电子、传感器、人工智能等多方面知识技术于一体的现代化、自动化设备。

焊接器人是为完成装配操作而设计制造的工业机器人,它是柔性自动化装配系统的核心设备。

机器人代替人工进行装配作业,生产效率高,可以避免工伤事故的发生,且精度高,能够确保产品的质量。

与一般工业机器人相比,装配机器人具有精度高、柔顺性好、工作范围小、能与其他系统配套使用等特点。

( )就相当于两只手一起端东西,对他的研究起步较晚。

( )就像人的一只手拿东西,具有结构简单,成本低,控制简单,运动空间大等优点。

灌装机器人使用较广的是( )。

包装输送机器人是利用动力和特殊的构件实现产品的包装和输送,改变了传统的输送机构。使得输送速度( ),输送空间减小。

包装机器人的种类有很多,主要有:装袋机器人、装箱机器人、堆码机器人、( )、包装输送机器人和识别检测机器人。

涂胶机器人的涂胶精度能够控制在( )以内,能够对转弯及接口的胶轨迹进行更有序的控制。

搬运机器人由执行机构、( )和控制机构三部分组成。

搬运机器人最早出现在1960年的( )。

大部分分拣机器人通过( )来识别物品形状,机械手抓取物品,放到指定位置来实现货物快速分拣。

常见的分拣机器人有串联机器人、并联机器人和( )。

识别检测机器人主进行产品包装后的识别与检测技术的智能化机器人。

灌装机器人可以实现有无瓶不输料、不盖不输瓶、破瓶报警和自动剔除等功能。

堆码机器人稳定性和平衡性要求较高,是一种功率较大的机器人。

包装机器人具有适用性强、高可靠性、自动化程度高、准确性好、能耗小、效率高等优点。

机器人代替人的工作进行涂胶,从事的工作量大,而且做工精细,质量好,但是效率较低。

机器人自动涂胶设备主要包含机器人、对中台、固定式旋转涂胶枪、涂胶泵、输送系统、控制系统、检测装置、清洗装置等。

搬运机器人的主要垛搬运机器人、自动上下料搬运机器人、生产线冲压搬运机器人、铸造搬运机器人、注塑搬运机器人、集装箱搬运机器人等。

搬运码垛机器人一般是由机械本体、控制系统、传感器、驱动器和输入/输出系统等五部分组成。

分拣机器人通过目标识别、目标抓取、目标分拣来完成工作。

并联机器人具有刚度大,承载能力强,精度高,速度快,末端件惯性小等特点。

砂带打磨机器人属于( ).

机器人在上料位置抓取产品,是否抓住产品主要靠夹具上的( )来探测。

折弯机器人的夹具一般是把( )安装在一个金属框架上构成的。

折弯机器人的一个完整工作周期包括取料、折弯、( )三个阶段。

加工机器人采用的是( ),结构刚度不高。

工具型打磨机器人的刀库系统,一般要能存储( )把打磨工具。

( )打磨机器人,是通过机器人夹持打磨工具,主动接触工件,工件相对固定不动,来完成打磨的。

( )打磨机器人,是通过机器人抓手夹持工件,把工件分别送达到各种位置固定的打磨机床设备,进行磨削、抛光等不同工艺和工序的打磨。

打磨机器人主要工件型打磨机器人和( )两种。

打磨机器人一般要选用( )关节工业机器人。

折弯机器人定位精准、重复性好。

折弯阶段是整个工作周期的核心,由一系列折弯操作完成,折弯时,机器人一直跟随。

折弯机器人的优势体现在效率、安全和质量三方面。

一个折弯单元通常包括:折弯机、配有夹具的机器人、进料站、厚度传感器、定位台、翻面架和出料站等。

加工机器人的主要有提高加工的效率、增加加工的范围、节省加工的成本等优势。

加工机器人与cnc机床比较,结构完全不一样。

打磨机器人主要有自动作业省人力、连续运行提产能、品质稳定良率高、设计灵活柔性强、无人作业降危害等优点。

工件型打磨机器人,主要用于大型工件的打磨加工,例如大型铸件、叶片、大型工模具等。

打磨机器人主要由机器人本体和打磨机具、抓手等外围设备组成,通过系统集成,统一协调,实现各种打磨功能。

打磨机器人要选用具有一定刚性的工业机器人,以适应工具打磨形成的冲击力。

下列哪个参数是电化学分析中电位法的被测参数

下列不属于光谱法的是

助色团对谱带的影响是使谱带

仪器分析是高纯度原料药首选的含量测定方法

光谱法一般都可以作为定量分析方法使用

仪器分析技术不但可用于定性、定量分析,还可以进行结构解析。

光谱法是以被测物质对光的发射、吸收、散射或荧光为基础建立的分析方法。

仪器分析方法常作为独立的方法来使用。

仪器分析在食品检测工作发挥着重要的作用,广泛应用于食品中营养成分、添加剂、重金属、农药和兽药残留、微生物毒素等检测。

仪器分析的优点

关于ph值标准缓冲液以下说法错误的是

配制ph标准缓冲液选用的溶剂是

配制规格为ph6.86的标准缓冲液选用

配制规格为ph4.00的标准缓冲液选用

永停滴定法的测定参数是

化学电池的组成不包括

以下不符合电池符号的书写规则是

以下关于化学电池说法错误的是

关于电池电动势说法错误的是

不受溶液浑浊、有色限制是电位滴定法的优点之一。

紫外-可见分光光度法所使用的波长在下列哪一范围内

下列操作中,不正确的是

关于朗伯-比尔定律,说法错误的是

物质的吸光系数与( )因素无关。

某同学用紫外-可见分光度计测定样品含量,测定波长在540nm处,下列选择正确的是()

被测溶液浓度、最大吸收波长、吸光度三者的关系是

双波长分光光度计的输出信号是

486.0nm、486.2nm,其标准值是486.02nm则其波长准确度是

助色团对谱带的影响是使谱带波长变长。

在紫外吸收光谱曲线中,能用来定性的参数是最大吸收峰的波长及其摩尔吸光系数。

在红外光谱分析中,用 kbr制作为试样池,这是因为

红外光谱仪的样品池窗片是

用红外吸收光谱法测定有机物结构时,试样应该是

下列分子中,不能产生红外吸收的是

当用红外光激发分子振动能级跃迁时,化学键越强,则

下列分子的总振动数最少的是

下列关于红外光谱确的是

红外光谱是

红外吸收光谱的产生是由于分子振动-转动能级的跃迁。

电磁辐射(电磁波)按其波长可分为不同区域,其中中红外区波长区是。

波数是指每厘米距离内光波的数目。

原子吸收分光光度计由光源、( )单色器、检测器等主要部件组成。

原子吸收分光光度法是基于光的吸收符合( ),即吸光度与待测元素的含量成正比而进行分析检测的。

空心阴极灯的主要操作参数是

在原子吸收分光光度法分析中,测定元素的灵敏度、准确度及干扰等,在很大程度上取决于

下列哪一项不属于原子吸收分光光度法的特点

在原子吸收分析中,如怀疑存在化学干扰,例如采取下列一些补救措施,下列措施适当的是

在原子吸收分光光度法中,为了防止回火,各种火焰点燃和熄灭时,燃气与助燃气的开关必须遵守的原则是

原子吸收分光光度法定量方法有

原子吸收分光光度法测定钙时,为消除磷酸盐对钙的干扰可采用

关于高温石墨炉原子化器,下列正确的是

在分子荧光测量中,要使荧光强度正比于荧光物质的浓度,必要的条件是

下列化合物关于荧光效率由强至弱正确的是

苯胺在下列哪种溶液中不发生荧光?

关于荧光分光光度法,下列不正确的是

荧光量子效率是指

下面分析方法不属于发射光谱法的是

荧光分光光度计常用的光源是

激发光波长和强度固定后,荧光强度与荧光波长的关系曲线称为

下列关于分子荧光分析特点的叙述正确的是

下列说确的有

硅胶含水量越大吸附能力

在平面色谱中跑在距点样原点最远的组分是

平面色谱中被分离组分与展开剂分子的类型越相似,组分与展开剂分子之间的

用硅胶g的薄层层析法分离混合物中的偶氮苯时,以环己烷—乙酸乙酯(9:1)为展开剂,经1h展开后,测得偶氮苯斑点中心离原点的距离为4.5cm,其溶剂前沿距离为10.5cm。偶氮苯在此体系中的比移值rf为

色谱两相包括

以下说确的是

按色谱分离原理可分为

按操作形式可分为

常用的吸附剂有

色谱法特点包括

理论塔板数反映了

对柱效能n,下列哪些说确

tcd的基本原理是依据被测组分与载气( )的不同

色谱法中下列说确的是

色谱峰高或面积可用

不同组分进行色谱分离的条件是

下列可用于定性分析的参数是

气相色谱仪分离效率的好坏主要取决于

氢火焰检测器的检测依据是不同溶液折射率不同。

火焰光度检测器是通用型、浓度型检测器

在液相色谱法中,按分离原理分类,液固色谱法属于

在高效液相色谱流程中,试样混合物在( )中被分离

液相色谱流动相过滤使用过滤膜的粒径是

下列用于高效液相色谱的检测器,( )检测器不能使用梯度洗脱。

不是高液相色谱仪中的检测器是

下列哪种是高效液相色谱仪的通用检测器

高效液相色谱仪中高压输液系统不包括

在液相色谱中,为了提高分析效率,缩短分析时间,应采用高压泵。

在反相键合色谱法中流动相常用甲醇-水。

下列哪种因素将使组分的保留时间变短

在质谱图中,被称为基峰的是

电子轰击离子源的离子化试剂是

质谱图中出现准分子离子峰时采用的离子化方式是

表示大气压化学电离源的英文缩写是

要想获得较多碎片离子宜选用的离子源是

质量检测范围没有上限的质量分析器是

判断分子离子峰的错误方法是

已知某化合物的质谱图中m和m 2峰强度比近似于1:1,则该化合物中可能含有的元素是

测定有机物的相对分子质量,应采用

质量分析器真空度应达到

the play will soon over.

the guy in brown can not trust.

a strange flying object is seemingly in the backyard.

broadly speaking, human beings maybe ided into three classes.

the cat maybe on the roof or in the bushes.

after i had had lunch at a village pub. i looked for my bag to get money for my bill.

i am always nervous on the first day of classes.

stanley always ready for a fight.

lighting the dark sky for a few seconds.

pumas, large cat-like animals, are found in america. .

the searching went on for several weeks, but the murderer was not caught.

we'll say goodbye to him, because he’ll away for two months.

the team plans to stay here for five days. during this time, they will give five performances.

the beggar may ask you for money. but he will never asking you to feel sorry for him.

“oh, that,”he said with a ile as if he was talking about an old friend.

we have an old musical instrument. it is called a clavichord. it was made ingermany. it was made in 1681. we keep our clavichord in the living room. our family has it for a long time. my grandfather bought the instrument many years ago. recently a visitor damaged it. she tried to play jazz on it! she struck the keys too hard. she broke two of the strings. my father was shocked. now he does not allow us to touch it. a friend of my father's is repairing it now.

the man handed a photo of a girl. the photo was to me. he did that silently. the man was old. the girl was pretty.

we have moved into a house. we did that recently the house was new. it had single-storied.

it occurred a short while ago. my brother helped me. we carried a bookcase up the stairs. the bookcase was very heavy.

it happened this morning. a nurse examined the ground. she did that carefully.

a tree was planted forty years ago. it was a lemon tree. it was near the church. it was for the memory of their marriage.

the book will tell a great deal. it will tell us about the age of the universe. it will tell us about the size of the universe.

i felt pleased with my bargain my pleasure was especial. my bargain was wonderful.

people find this sort of joke. these people are foreign. this sort of joke are distasteful.

i was being tested. the test was for a driving license. it was the third time.

a murder crossed the road. the road was in front of me. he did that with a sudden.

linda is taller of the two sisters.

stephen’s house is so large as john's.

the area of our city is larger than your city.

no resource is as vital as water.

john is senior to me by two years.

this room is as twice large as that one.

the yellow river is the second long river in china.

i know you better than him.

there are more students in class one than in class two.

life was much harder than it is today.

her employee is a pleasant young woman with a ring named rebecca.

the homework scarcely took them an hour to complete.

the president has only two days to stay with his family.

they stood in line to buy tickets to the show for twenty minutes.

a dog was hit by a car running across the street.

i had lunch at a village pub. after that i looked for my bag. i had left it on a chair. the chair was beside the door. now it wasn't there! i looked for it. the landlord came in. he asked 'did you have a good meal?". i answered 'yes, thank you. i can't pay the bill. i haven't got my bag.' the landlord iled. he immediately went out. in a few minutes he returned. he had my bag in his hand. he gave it back to me. he said 'i'm very sorry. my dog had taken in into the garden. he often does this!'

the earth is big. the moon is all. about 50 moons equal to one earth.

my mother is sixty eight years old. my father is seventy four years old.

jeff was a business planner. jeff was at a fortune 500 company. jeff was successful.

pumas are animals. they are large. they are cat-like. they are found inamerica.

his boss lost a car last night. the car was white. the car was expensive. the car was very pretty.

he put forward a good suggestion. the suggestion is for students. the students are going to study abroad.

the hotel is not spacious. the hotel is not comfortable.

the word derives from latin. it is probable. the meaning of the word escapes me.

i want to visit the british museum. i want to visit the tower of london. the desire is particular.

technology has changed our life. it has done that over the past two decades. the change is total.

the reason why he didn’t come is because he was ill.

workers are constructing a building for storage.

although it has not yet been finished, i believe it will be carried on.

we grew many different vegetables including cabbages, beans, eggplants, potatoes, tomatoes, and etc.

each and every one of the flowers has their own colors and ells.

it is imperative that every one of us remold our world outlooks.

playing a musical instrument is a valuable experience for a child. they teach them many important things.

it is said that if anyone touches the tree, he or she will have bad luck.

there is no doubt that each of us has our own opinions.

seemingly, neither of them remembered their instruction.

either of the boys may take their bags in the front of the table.

the car drove slowly along the back road. it was quite muddy.

the mountains were covered with trees. they were many different varieties.

if you receive from a policeman a request like this, you cannot fail to obey him!

the instrument, which was bought by my grandfather, was sent to my house.

thomas jefferson may be less famous than george washington. thomas jefferson may be less famous than abraham lincoln. thomas jefferson is the third president of theunited states. (请使用同位语)

they put the tools in place. the tools are of their new business. the tools are currycomb, brush and pitchfork. (请使用同位语)

the team came onto the court. we jumped to our feet. we cheered. we were rocket fans. (使用同位语)

our department head will review the memo. after that the memo is circulated. our department head is a careful reader. our department head is an outspoken critic. (请使用同位语)

he had every chance of winning. he lost at last. (请使用连词)

we are in the same boat now. we have to cooperate. we have to back up each other. (请使用连词)

the wind was strong. the rain was unstoppable. i felt very cold. (请使用连接副词thus)

we wanted to arrive at the square. we wanted to do it on time. we were delayed. traffic resulted in our delay. (请使用连接副词however)

the workers have not been paid. we have given them no pay for two months. we owe our suppliers £50,000. (请使用连接副词in addition)

my mother has come. my father has come. i have not seen them. the train was delayed by snow. (请使用连词)

i like going out with her because she really made me feel important.

i used to think my parents were fussy, but as you grow older, you become more tolerant.

people like living in kunming because they have good weather all year long.

we tried to move around, but there is not too much we can do.

it’s wise for beginning drivers to stay out of heavy traffic until they have more experience.

jenney liked fishing, but hunting was also enjoyed by him.

some people like apples, but watermelons are preferred by others.

first rise to your feet and then you should address your guests.

while cleaning his gun, it went off unexpectedly.

approaching the woods, you will see a cabin.

after looking out the window for hours, i found the rain passed.

tearing the curtains apart, there was no one hiding there.

to swim properly, a course of instruction is necessary.

when a all boy, his parents were very strict with him.

while we were climbing the hill, the rain began to fall.

he was still mumbling something. these things were about hospitals. he was mumbling at the end of the party.

they had got away. they had taken diamonds. the diamonds are worth of thousands of pounds.

he was in hospital. he would have to stay there. he would have to spend another two weeks.

she must appear in the play. she must wear a dress. she must wear stockings. the dress is red. the stockings are long.

people must have been driven away. the number of the people excels a hundred. they have to leave their homes. the reason is the noise.

he was defeated by a boxer. the boxer was called gentleman jackson. people quickly forgot him.

the couple has seen their son off. they returned home. they didn’t say anything.

hollywood functions like a magnet. it draws young people. they are ambitious. they are from all over the world.

mary knelt. she shut her eyes. she prayed to the goddess.

you starve to death. you live like robinson crusoe.(either ... or) he waited for a boat. the boat never comes.

the desert had scarcely rained last summer.

i think the new political reform will not last barely a month.

do not coin terms that are intelligible to nobody.

he has neither talent nor the desire to learn.

the pilot could hardly find nowhere to land.

the castle burnt down a few years ago was never rebuilt.

many villagers, knowing all this, still insisted on my paying for the damage.

many students who followed the instructions mechanically failed to obtain satisfactory results.

columbia university the second-largest landowner in new york city is part of the ivy league.

the tortoise as far as i know has been on earth for thousands of years.

you should forgive him for his forgetfulness; after all he is over seventy.

the child needed sturdy shoes which were expensive.

the old lady has just retired from india, where she had lived for ten years.

darwin's most important book, on the origin of species, was the result of many years of research.

many countries, for example, mexico and japan, have a lot of earthquakes.

i got rid of him. it took me over half an hour.

i decided. i would not buy anything. then i got off the ship.

i pretended. i had not seen him it was no use.

the woman simply took the parcel. she walked out of the shop. she didn’t pay.

the man was arrested. after that he admitted. he had hidden in the box. he hid there before the plane left london

he lay at full length. he was upon his stomach. his head rested upon his left forearm. (请用独立主格结构)

he has finished her homework before he went to bed.

anybody, either a firm or an inidual, have a chance to open a current account.

neither volleyball nor basketball is a hundred years old.

not only you but (also) i am to blame.

there are an ocean of flowers.

at present, there is a lot of pilot projects in the whole country in every large telecommunication operator.

the great majority of the people behave according to the law rule.

the audience was impressed by his profound lecture.

a all fishing boat was carried miles out to sea by the powerful fish.

i used to travel by air a great deal when i was a boy.

there he was picked up by policeman and sent back to theenglandby local authorities.

in 1860, a better plan was put forward by an englishman, william low.

as soon as he opens the gate from the outside, he comes into the garden and waits until the gate shuts.

children were at school, my huand was at work and the house was quiet.

he slept very well for first two nights, but on third night, storm blew up.

the big clock used to strike the hours day and night. it was damaged many years ago.

a man broke his right leg. people took him to hospital. it happened a few weeks before christmas.

a desert island is a sort of paradise. there the sun always shines. we sometimes imagine so.

i bought a book of maps. i found it most helpful. it is helpful on the journey. the journey is cross country.

people work in offices. they are frequently referred to as "white-collar workers'. they usually wear a collar to go to work. they usually wear a tie to go to work

the teacher explained that passage. he did that again and again. every student might understand it.

the man slept on the floor. he was tired of that. he saved up for years. he wanted to buy a real bed.

this time, he managed to climb into the mouth of the volcano. he could take photographs. he could measure temperatures.

someone gave the alarm. the great ship turned. the turning is sharp. the ship wanted to avoid a collision. a collision was direct.

i had the breakfast and i sent the children to school.

i returned home but it was still early.

a iling policeman told him and his bicycle had been found.

the weather was very hot so he carried the bed on to the roof of his house.

over the years, the crash was forgotten when the wreck remained undisturbed.

the plane was late and detectives were waiting at the airport all morning.

nearly everybody enters for the competition each year, but linda wins every time.

when he iled, he remembered his hard early years and the long road to success.

we all have secrets, but we do not want even our closest friends to learn.

don’t stay up too late is a good living habit.

it is said that if anyone touches the tree, he or she will have bad luck.

there is needed that kind of capacity to cope with the problem.

in order to keep close relationship between friends is to pay respect to each other.

if two men whose interests are the same, they can make good friends.

though the sound could be heard clearly, it took me a long time to react.

my advice is this. you practice speaking english. you should do as often as possible.

you are coming to london. that is the best news. i have heard some news recently.

fashion differs from country to country. that may reflect the differences. the differences are of culture. the reflection is from one aspect.

the curious thing was this. the lake was not marked. it was not on the map.

what invariably happens? the question is this. a great number of things choose to go wrong. they occur at precisely the same moment.

one of the boxes was extremely heavy. no one could account for the fact.

experts confirmed this. a puma is cornered. it will attack a human being.

i rang the bell. i was not surprised to see this. mr. smith was still as fat as ever.

the wallet must have been found by one of the villagers. sam was sure of that. it was no returned to him.

people work in offices. they are frequently referred to as "white-collar workers'. that is for the simple reason. the reason is this. they usually wear a collar and tie to go to work.

pollution is the price. we pay for the price for our planet. it is overpopulated. it is over industrialized.

taking a path which led out of the town, we crossed a few fields until we came to a dense wood.

we could see the path continued on the other side, but we had no idea how we could get across the stream.

i looked up. i saw some children. they were in rags. they surrounded us. they were silent. they were looking at us. they saw us eating.

turning back down the main street, we quickened our pace and made our way rapidly towards the stream where we hoped the boatman was waiting.

after i had had lunch at a village pub, i looked for my bag. i had left it on a chair beside the door, but now it wasn't there.

my old friend, harrison, had lived in the mediterranean for many years before he returned toengland. he had often dreamed of retiring inenglandand had planned to settle down in the country.

adding sentence variety to your writing can give it life and rhythm. also, it can reduce repetition and add emphasis.

after they had a wonderful meal, they told stories and sang songs by the campfire, but some time later it began to rain and the boys felt tired so they put out the fire and crept into their tent.

towards evening, the boat struck a rock and the girl jumped into the sea. then she swam to the shore after she had spent in the water the whole nigh. during that time she covered a distance of eight miles.

dan was most surprised when he heard the news that his bicycle had been found and he was amused too, because he never expected the bicycle to be found, for it was stolen twenty years ago when dan was a boy of fifteen!

many people pretend that they understand modern art. they always tell you what a picture is 'about'. of course, many pictures are not 'about' anything. they are just pretty patterns. we like them in the same way that we like pretty curtain material.

the woman hesitated for a moment. she finally went in. and she asked to see a dress. that dress was in the window.

this time he also met misfortune. his engine broke down. he had to land on the sea. this was the second time.

many people came from many countries to see it and a lot of goods were sent to the exhibition from different places of the world, and also a lot of machinery were exhibited, among which the most wonderful machine was a steam hammer.

daniel heard the news. he was most surprised.

the god has the head of a cow. it was usually placed inside a mummy.

robert and i went into the living room. there we talked. our talk lasted for a couple of hours.

he returns home at night. he always finds this. someone has parked a car. the car is outside his gate.

a light plane flew off course. the plane carries passengers. it crashed in the mountains. its pilot was killed.

a week before, he had completed an overland flight. flight was successful. during the flight he covered twenty-six miles.

my nephew is named george. he has a box. the box is used to save money. it is always empty.

what can be eaten? what cannot be eaten? people try to make a decision. at that time, they usually become quite illogical.

he was greeted by a ell. the ell was unpleasant. the ell made him believe this. i was telling the truth.

you visit london. you will see many things. one of the first things is big ben. it is a famous clock. you can hear it all over the world. you can hear it on the b.b.c.

我国最高权力机关和最高权力机关的执行机关分别是什么()

行政管理的主要构成要素应该是行政权力、行政职能、行政组织、行政体制和行政手段方法等构成。其中()是政治权力的重要组成部分,是行政管理活动赖以展开的强制性依据。

行政管理的主要构成要素中,()是的职责和任务,也是行政机关设置的依据。

1887年学者、后来的第28位总统威尔逊发表文章(),文中首次提出并论证了要建立一门独立的行政科学。

德国学者()在上世纪20年代前后,对行政组织理论进行深入细致全面的研究,他提出的官僚制理论,成为行政组织的经典理论。

留有装订边的图样,装订边处宽度为( )mm。

标准规定尺寸标注应放在( )图层。

机械样板图应保存为( )格式。

机械图样中的比例就是用实物比图形的比例尺。

机械图样中的汉字采用的是3.5mm的仿宋体书写。

用尺规绘制或计算机画机械图样的实心箭头。

绘制a3样板图。

如下图中,为了保证准确作图,在画直线ac时,需要设置a点和c点的对象捕捉模式分别是( )。

机械制图当中基本图幅有a0、a1、a2、a3、a4五种,其中最小图纸a4的尺寸为210mm x 297mm。

当一条直线垂直于投影面时,在该投影面上反映( )。

当一条直线平行于投影面时,在该投影面上反映( )。

中间圆弧与已知的两圆弧外公切时,绘制完成后,需要将多余的弧去掉,应用到的操作是( )

选择三视图对应的立体( )。

1、2、3、4四个立体分别对应的左视图排序为( )。

斜度为1:5直线夹角比等于锥度1:5直线夹角大,且的刚好是两倍关系。

已知m点在主视图上的投影,则其在俯视图上的投影为( )

下图中,主、俯、左三个视图中错误的视图是( )

主、俯、左三个视图中正确的视图是( )

画三角形的内切圆,正确的操作是(   )

下述图形尺寸标注正确的是( )

已知三棱锥的三视图和表面点a的正面投影a',则它的水平投影a( ),侧面投影a"( )。

2.4-1(1)已知两圆柱相交的俯视图和左视图,它的主视图应为( )。

2.4-1(2)图示的三视图中,主视图应有( )相贯线。

主、俯、左三个视图中有错误的视图是( )

表示球面直径的缩写词为( )

主、俯、左、后视图中唯一错误的视图是( )

图中标注错误的尺寸个数有( )个

主、俯、左三个视图中错误的视图是( )

3.3-1已知主视图和俯视图是两个相同的矩形,若主、俯视图不能再添加任何的粗实线或虚线,除已有的四种方案,请问下面的( )方案是正确的?

图中标注错误的尺寸个数是( )

主、俯、左三个视图中有错误的视图是( )

下列叙述正确的是( )

在下图中,在图(1)的基础上完成图(2),需要使用什么编辑命令?在图(2)的基础上完成图(3)用什么编辑命令?

表示孔在圆周上均匀分布的缩写词为( )

4.1-1下图中a向斜视图和b向局部视图正确的是( )。

将物体的某一部分向基本投影面投射所得的视图称为( )。

局部视图分界线可用( )。

基本视图就是在三视图的基础上增加了仰视图、右视图和后视图的六个视图。

第三角画法中左视图放置在主视图的左侧。

物体向不平行于任何基本投影面的平面投射所得的视图称为斜视图,斜视图不能旋转配置。

将第三角画法转为第一角画法的三视图(请先下载附件再完成)。

将第三角画法转为第一角画法的三视图(做题前请先下载附件)。

关于gb/t 17452规定的三种剖切面的应用范围有四种说法,正确的说法是( )

e向视图的投影方向是( )

对机件的四种表达方案进行分析比较,其中正确的是( )

全剖视机件时虚线是需要保留的。

将机件半剖视后,一定要将剖切位置的投影画出来,即用粗实线来作为剖切与不剖切的分界线。

阶梯剖是全剖和半剖的一种补充剖切方法。

半剖就是将机件切去一半的剖切方法,绘制时应将图形的左边剖切,右边保持原样不变。

下列断面图中错误的一个是( )。

图示机件,a-a移出断面图绘制正确的是( )

作已知两圆的公切线,不会用到的命令是(   )。

主、俯、左三个视图中错误的视图是( )

移出断面图用细实线绘制,重合断面图用粗实线绘制。

肋板纵向剖切时断面要画剖面符号,横向剖切时断面不要画剖面符号。

在车削外螺纹工序中,检查螺纹中径较精确的方法是( )。

用于连续的普通螺纹与用于传动的丝杠相比较,其主要设计特点的差别是( )。

图样中一般不画出螺尾,此时,图样中标注的螺纹部分长度是指( )

下列内、外螺纹连接画法中正确的是( )。

述三个模型的视图中正确的是( )。

下图中,主、俯、左三个视图中错误的视图是( )

下列关于“对象捕捉”工具条操作不正确的是( )。

齿轮的分度圆应画成单点画线,齿根圆可省略不画。

内螺纹的大径应画成粗实线(01图层,白色),小径应画成细实线(02图层,绿色)。

查取标准可知,外螺纹的小径等于大径的0.85倍。

以下轴零件图两处采用了( )图,一处采用了( )图。

阅读支架的零件图,主视图用了( )表达方法。

零件的主视图应选择( )。

一张完整的零件图,就包括( )部分。

齿轮的分度圆在图纸上用单点画线表示。

滚动轴承的通用画法是用矩形线框及位于线框正立的十字符号表示,这个十字符号是细实线。

半圆键是一种紧键联接,半圆键的顶部与轮毂是没有缝隙的。

斜齿轮的画法与直齿轮相同,可用三条与齿轮旋向相同的细实线来表示。

一对齿轮啮合的图样中,在不反映圆的视图上,在啮合区域内,若一个齿轮的齿顶线画成粗实线,另一个齿轮的齿顶线应画成点画线。

请选择下图正确的左视图( )。

下列符号中表示强制标准的是( )。

局部视图分界线可用( )。

表示零件的结构形状、大小和有关技术要求是( )。

在下图中,先画出图(a),然后利用什么编辑命令完成图(b)?

抄画壳体零件图,并补齐c向视图,标注尺寸、尺寸公差和几何公差。 提示:c向视图是指主视图的外形视图,无须剖视,虚线可以不画。

表面粗糙度中的参数ra的名称是( )。

基孔制是基本偏差为( )的孔的公差带,它们的( )极限偏差为零。

轴和孔的端面上加工倒角的目的是为了便于安装和操作安全。

退刀槽和越程槽的设计主要是为了便于刀具退出,它的标注一般有两种形式,“槽宽x槽深”或“直径x槽深”。

ra的数据越小,表明该表面的精度越高。

在装配图中,对于紧固件以及轴、键、销等,当剖切面按( )时,这些零件按不剖绘制。

装配图中零件序号应自下而上,如标题栏上方位置不够时,可将明细栏顺序画在标题栏的( )方。

表示机器或部件的图样称为( )。

在装配图中,对于薄片零件或微小间隙,无法按其实际尺寸画出,或图线密集难以区分时,可采用( )。

制造和检验零件的依据是( )。

一张完整的装配图包括以下几项基本内容一组图形 、必要的尺寸、技术要求和标题栏、零件序号、明细栏。

装配图中对规格相同的零件组,可详细的至少画出三处,其余用细点画线表示其装配结构。

装配图中的尺寸种类有性能尺寸、装配尺寸、安装尺寸、外形尺寸和其它重要尺寸。

两个零件的接触表面,接触面用两条表示共有轮廓线;非接触面用一条轮廓线表示。

在装配图中,当某个零件的形状未表示清楚而影响对装配关系的理解时,可另外单独画出该零件的某一视图。

下列装配结构有错误的是( )。

下图中为防止各表面发生干涉,( )是错误的。

装配图中零件的序号应沿水平或垂直方向按顺时针顺次排列,并尽量使序号间隔相等。

装配图中不需要标注出每个零件的全部尺寸,一般只需标注规格尺寸、装配尺寸和安装尺寸即可。

装配图中相邻两个或多个零件的剖面线应有所区别,即使剖面线角度相同但间隔不等也可以,无需相互错开。

将立体三视图的左视图所漏线补齐,正确的是( )。

已知立体的主视图和俯视图,正确的左视图是( )。

已知立体的主视图和俯视图,正确的左视图是( )。

已知立体的主视图和左视图,它的俯视图是( )。

将下图的主视图全剖后,正确的是( )。

补齐下列三视图中主视图的相贯线,正确的是( )。

已知主视图和俯视图,正确的左视图是( )。

下列剖视图中,表达正确的是( )。

看懂主、俯视图,想象出组合体的形状,错误的左视图( )。

已知立体的主、俯视图,正确的左视图是( )。

下列四组视图中,主视图均为全剖视图,其中( )的主视图有缺漏的线。

已知圆柱体截切后主、俯视图,正确的左视图是( )。

根据已有的两个视图,( )是正确的左视图。

下图中正确的左视图是( )。

下图中正确的局部剖视图是( )。

机械样板图的文件后缀名为“.dwt”,它可以被多次调用,方便作图。

相交平面剖切的机件时,剖视图与其它视图一定要符合三等原则。

组合体的尺寸主要分定形尺寸、定位尺寸和总体尺寸三大类,定位尺寸确定各基本形体间的相对位置。

图样上尺寸标注要齐全,相贯线的半径和截交线的尺寸等不能遗漏。

图样的比例就是图形大小比实物大小,因此1:2是缩小的比例。

最小的图纸是a3,它的尺寸规格是297*420(单位:mm)。

基本视图就是三视图,包括主视图、俯视图和左视图。

斜视图和局部视图都是为了简化作图,表达某一局部的倾斜结构。

第三角画法画出的三视图是指主视图、俯视图和左视图。

几个平行平面的剖切与相交平面的剖切的实质就是全剖视图。

下列内螺纹的画法中正确的是( ) 。

下列剖视图中,画法和标记都正确的是( )。

下列断面图中错误的一个是( )。

按现行螺纹标准,特征代号g表示的螺纹,其名称是( )。

图示机件,a-a移出断面图绘制正确的是( )。

参考立体图和俯视图,关于该机件的表达方案下列叙述不正确的是( )。

主、俯、左三个视图中错误的视图是( )。

正六边形的尺寸标注正确的是( )。

关于配合尺寸ф30h7/f7下列叙述不正确的是( )。

对机件的四种表达方案进行分析比较,其中正确的是( )。

将下列视图中所缺的线条补齐。

将下列视图中所缺的线条补齐。

已知三视图中的两个视图,补画所缺的第三个视图。

将第三角画法的三视图改画为第一角画法的三视图。

按1:1比例抄画下列图形,不用标注尺寸。

将主视图改画为全剖视图。

抄画零件图的主视图并标注尺寸。

2.拉压杆应力公式的应用条件是( )

以下关于材料力学一般性能的结论中哪一个是正确的?( )

铸铁拉伸试验破坏由什么应力造成?破坏断面在什么方向?以下结论哪一个是正确的?

铸铁压缩试验破坏由什么应力造成?破坏断面在什么方向?以下结论哪一个是正确的?

铸铁拉伸试验破坏由什么应力造成?破坏断面在什么方向?以下结论哪一个是正确的?

关于材料的冷作硬化现象有以下四种结论,正确的是哪一个?

直径为d的圆截面钢杆受轴向拉力作用,已知其纵向线应变为,弹性模量为e,给出杆轴力的四种答案,问哪一种是正确的?( )

低碳钢试样的应力—应变曲线可以大致分为四个阶段。阶段ⅰ 阶段;阶段ⅱ 阶段;阶段ⅲ 阶段;阶段ⅳ 阶段。

低碳钢试件在拉伸和压缩时,在屈服阶段以前,两曲线基本重合。因此拉伸和压缩时的 极限与拉伸时基本相同,线性阶段,拉伸、压缩直线斜率近似相等,故其 也相同。

边长分别为和的两正方形截面杆,其两端作用着相同的轴向载荷,两杆横截面上正应力比为 。
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