全国2007年4月高等教育自学考试机械设计基础试题

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全国2007年4月高等教育自学考试

全国2007年4月高等教育自学考试

全国2007年4月高等教育自学考试信号与系统试题课程代码:02354一、单项选择题(本大题共12小题,每小题2分,共24分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。

错选、多选或未选均无分。

1.如题1图所示,二端口网络Z 参数中的Z 22为( ) A .10Ω B .7.5ΩC .5.5ΩD .9.375Ω2.计算ε(3-t)ε(t)=( ) A .ε(t)- ε(t-3) B .ε(t) C .ε(t)- ε(3-t) D .ε(3-t)3.已知f (t ),为求f (t 0-at )则下列运算正确的是(其中t 0,a 为正数)( )A .f (-at )左移t 0B .f (-at )右移a tC .f (at )左移t 0D .f (at )右移a t4.已知f (t )=δ′(t ),则其频谱F (j ω)=( )A .ωj 1B .)(1ωπδω+j C .ωjD .)(21ωπδω+j 5.信号f (t )的带宽为Δω,则信号f (2t -1)的带宽为( ) A .2Δω B .Δω-1 C .Δω/2D .(Δω-1)/26.已知周期电流i (t )=1+t t 2cos 22cos 22+,则该电流信号的平均功率P T 为 ( ) A .17W B .9W C .4WD .10W7.如题7图所示的信号,其单边拉普拉斯变换分别为F 1(s ), F 2(s ), F 3(s ),则( )A .F 1(s )= F 2(s )≠F 3(s )B .F 1(s )≠F 2(s )≠F 3(s )C .F 1(s )≠F 2(s )= F 3(s )D .F 1(s ) = F 2(s )= F 3(s )8.某系统的系统函数为H (s ),若同时存在频响函数H (j ω),则该系统必须满足条件( ) A .时不变系统 B .因果系统 C .稳定系统D .线性系统9.已知f (t )的拉普拉斯变换为F (s ),则dtt df )(的拉普拉斯变换为( ) A .sF (s ) B .sF (s )-f (0-)C .sF (s )+f (0-)D .⎰-∞-+0)(1)(ττd f s s sF10.已知某离散序列,其它 ⎩⎨⎧=≤=n N n n f ,0||,1)(该序列还可以表述为( )A .)()()(N n N n n f --+=εεB .)()()(N n N n n f ---+-=εεC .)1()()(---+=N n N n n f εεD .)1()()(----+-=N n N n n f εε11.已知某离散系统的系统模拟框图如题11图所示,则该系统的差分方程为( )A .)()1(31)(n f n y n y =-+B .)()1(31)(n f n y n y =--C .)()(31)1(n f n y n y =-+ D .)()(31)1(n f n y n y =++ 12.若f (n )的z 变换为F (z ),则)(n f a n 的z 变换为( ) A .)(az F B .)(z aF C .)(1z F aD .⎪⎭⎫ ⎝⎛a z F二、填空题(本大题共12小题,每小题2分,共24分)请在每小题的空格中填上正确答案。

全国2007年4月高等教育自学考试

全国2007年4月高等教育自学考试

全国2007年4月高等教育自学考试计算机软件基础(二)试题课程代码:02365一、单项选择题(本大题共20小题,每小题1分,共20分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。

错选、多选或未选均无分。

1.下面关于软件概念表述正确的是()A.软件就是程序B.软件是程序加说明书C.软件是程序加文档D.软件是程序加数据2.描述客观事物的数、字符和所有能输入到计算机中并能被计算机程序加工处理的符号的集合称为()A.数据元素B.数据C.数据项D.数据对象3.由3个结点可以构造出形状不同的二叉树的个数共有()A.2个B.3个C.4个D.5个4.二维数组A的每个元素是由6个字符组成的串,行下标i的范围从0到8,列下标j的范围是从1到10。

存放数组A的全部元素所需存储空间的字节数至少为()A.90 B.180C.240 D.5405.一棵n个结点的满二叉树,有m个叶子结点,t个分支结点,则下面所给的关系式中,正确的是()A.n=2m-1 B.n=2(t+1)C.n=2t-1 D.n=m+t+16.下列查找、排序方法中时间复杂度为0(nlog2n)的方法是()A.直接插入排序B.线性查找C.二分插入排序D.二分查找7.在采用虚拟存储技术的系统中,由于受到某个限制,用户的虚拟存储空间并不能无限增大,这种限制来自()A.外存储器大小和指令中允许的地址长度B.指令中允许的地址长度和内存大小C.外存储器大小和内存大小D.内存大小和指令中允许的地址长度8.在页式存储管理中,完成用户程序的逻辑地址转换成内存的物理地址这一工作的是()A.用户程序B.操作系统C.地址转换机构D.工具软件9.DOS对存储区管理所采用的方式是()A.单一连续分配B.简单页式存储管理C.段式存储管理D.段页式存储管理10.在采用连续结构的文件系统中,文件的起址(物理块号)是存放在()A.文件的目录项中B.索引表中C.文件分配表中D.索引文件中11.在一个采用页式存储管理的操作系统中,页的大小是2048字节,程序地址为3249的页内相对地址是()A.147 B.1201C.1236 D.205512.DBA是数据库系统中的()A.数据库B.数据库管理员C.数据分析员D.数据库用户13.实体模型中必须定义()A.实体和关键字B.属性和关键字C.实体和属性D.关键字14.根据采用的数据模型来考虑,数据库管理系统Foxpro属于()A.层次型B.关系型C.网状型D.面向对象型15.在建立数据库结构的structure对话框中键入一个字段名时,其字段类型Type自动显示出可选项类型。

中南大学2007年上学期机械设计基础试卷

中南大学2007年上学期机械设计基础试卷

---○---○------○---○---………… 评卷密封线 ……………… 密封线内不要答题,密封线外不准填写考生信息,违者考试成绩按0分处理 ……………… 评卷密封线 ………… 中南大学考试试卷 2006~2007 学年二学期 机械设计基础课程 时间110分钟一、判断题(请在后面的括号中,正确的填√,错误的填×) (10分) 1. 如果机构的自由度F =2,则机构无确定性运动。

( ) 2. 作相对运动的三个构件的三个瞬心不一定在一条直线上。

( ) 3. 在凸轮机构中,其压力角越小,效率越高。

( ) 4. 渐开线的形状取决于基圆的大小。

( ) 5. 行星轮系的自由度为2。

( ) 6. 受轴向力的紧螺栓联接中,螺栓所受总载荷是预紧力与轴向力的和。

( ) 7. 在蜗杆蜗轮机构中,传动比121212d d z z i ==。

( ) 8. 由于弹性滑动,主动带轮的圆周速度大于从动带轮的圆周速度。

( ) 9. 当链条节数为奇数时,链条需用过渡链节,这将产生附加弯矩。

( ) 10.滑动轴承轴瓦的油沟应该开在承载区,以便于进油和润滑。

() 二、选择填空题(20分) 1. 平面机构中若引入一个高副将带入 个约束,而引入一个低副将带入 个约束。

① 1;② 2;③ 3。

2. 减小滚子半径,滚子从动件盘形凸轮实际轮廓线外凸部分的曲率半径将 ;若增大基圆半径,则凸轮机构的压力角将 。

① 变大;② 变小;③ 不变。

3. 标准渐开线齿轮传动在标准安装时,分度圆将 节圆;啮合角将 分度圆压力角。

① 大于;② 小于;③ 等于。

4. 螺纹常用于双向传动; 螺纹常用于联接。

① 三角形;② 锯齿形;③ 梯形。

5. 在键联接中,平键的工作面是 ;楔键的工作面是 。

① 上面;② 下面;③ 上、下两面;④ 两侧面。

6. 一铰链四杆机构满足杆长条件,当以最短杆为机架时,该机构为机构,当以最长杆为机架时,又为机构。

全国2003年4月高等教育自学考试机械设计基础试卷

全国2003年4月高等教育自学考试机械设计基础试卷

全国2003年4月高等教育自学考试机械设计基础试题课程代码:02185第一部分选择题(共40分)一、单项选择题(本大题共20小题,每小题2分,共40分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。

错选、多选或未选均无分。

1.在如图所示的单缸四冲程内燃机中,序号1和10的组合是()2.若两构件组成低副,则其接触形式为()A.面接触B.点或线接触C.点或面接触D.线或面接触3.平面运动副的最大约束数为()A.1 B.2 C.3 D.54.在设计直动滚子从动件盘形凸轮机构时,若发生运动失真现象,可以()A.增大滚子半径B.减少基圆半径C.增大基圆半径D.增加从动件长度5.在下列凸轮机构中,从动件与凸轮的运动不在同一平面中的是()A.直动滚子从动件盘形凸轮机构B.摆动滚子从动件盘形凸轮机构C.直动平底从动件盘形凸轮机构D.摆动从动件圆柱凸轮机构6.在槽轮机构中,为避免圆销与轮槽发生突然撞击,槽轮在开始和终止转动的瞬时角速度应()A.等于零B.大于等于零C.小于零D.小于等于零7.普通紧螺栓联接在承受横向外载荷F∑作用时,其螺杆()A.仅受到预紧力F′的作用B.仅受到一个横向外载荷F∑的作用C.仅受到摩擦力F f的作用D.既受到预紧力F′又受到横向外载荷F∑的作用8.普通平键的长度应()A.稍长于轮毂的长度B.略短于轮毂的长度C.是轮毂长度的三倍D.是轮毂长度的二倍9.在多级减速传动中,带传动在传动系统中的设计位置( )A .宜在低速级B .宜在中间级C .宜在高速级D .不受限制10.单个渐开线齿轮( )A .分度圆等于节圆B .分度圆小于节圆C .分度圆大于节圆D .没有节圆11.闭式硬齿面齿轮传动的主要失效形式是( )A .齿面胶合B .轮齿疲劳折断C .齿面磨粒磨损D .轮齿过载折断12.在开式齿轮传动的设计中,通常将计算出的模数加大5~10%,这主要考虑( )A .轮齿疲劳点蚀的影响B .轮齿胶合的影响C .轮齿磨粒磨损的影响D .轮齿受冲击载荷的影响13.蜗杆传动的传动比i 等于( )A .12d d B .12n n C .21d d D .21n n14.蜗轮的螺旋角β与蜗杆( )A . 分度圆处的导程角γ大小相等,方向相反B .分度圆处的导程角γ大小相等,方向相同C .齿顶圆处的导程角γ1大小相等,方向相反D . 齿顶圆处的导程角γ1大小相等,方向相同15.在下列联轴器中,通常所说的刚性联轴器是( )A .齿式联轴器B .弹性套柱销联轴器C .弹性柱销联轴器D .凸缘联轴器16.在计算轴的当量弯矩M v =22)(aT M 公式中,a 是为了考虑扭矩T 与弯矩M 产生的应力( ) A .方向不同 B .类型不同 C .位置不同 D .循环特征不同17.高速、重载下工作的重要滑动轴承,其轴瓦材料宜选用( )A .锡基轴承合金B .铸锡青铜C .铸铝铁青铜D .耐磨铸铁18.滚动轴承在一般转速下的主要失效形式是( )A .过量的塑性变形B .过度磨损C .疲劳点蚀D .胶合19.滚动轴承工作时,固定套圈的应力变化特征为( )A .对称循环B .脉动循环C .恒定不变D .随机变化20.在机械中安装飞轮,可以( )A .减小周期性速度波动B .消除周期性速度波动C .减小非周期性速度波动D .消除非周期性速度波动第二部分 非选择题(共60分)二、填空题(本大题共10小题,每空1分,共10分)请在每小题的空格中填上正确答案。

2007年4月自学考试自考全国管理会计(一)历年试卷试题真题

2007年4月自学考试自考全国管理会计(一)历年试卷试题真题

2007年4月自学考试自考全国管理会计(一)历年试卷试题真题2007年4月自学考试自考全国管理会计(一)历年试卷试题真题.doc 试卷内容预览网站收集有1万多套自考试卷,答案已超过2000多套。

我相信没有其他网站能比此处更全、更方便的了。

2007年4月高等教育自学考试全国统一命题考试管理会计(一)试卷(考试时间:4月21日上午8:30-11:00)本试卷分为两部分,满分100分;考试时间为150分钟。

第一部分为选择题,1页至3页,共40分。

应考者必须在“答题卡”上按要求填涂,不能答在试卷上。

第二部分为非选择题,4页至10页,共60分。

应考者必须在试卷上直接答题。

第一部分选择题(共40分)一、单项选择题(本大题共20小题,每小题1分,共20分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其选出并将“答题卡”的相应代码涂黑。

未涂、错涂或多涂均无分。

1.财务会计的服务对象侧重于()A.企业内部管理人员B.企业外部信息使用者C.CEO和CFO D.企业董事会2.企业的生产经营能力一旦形成,在短期内难以作重大改变。

属于这种经营能力成本的是()A.约束性固定成本B.酌量性固定成本C.重置成本D.沉没成本3.某公司2005年预计的固定成本总额为200000元,单位变动成本为4元,单位销售价格为6元,其盈亏临界点的实物销售量为()A.600000件B.200000件C.100000件D.50000件4.有关亏损产品是否停产或转产的决策分析,一般可采用的方法是()A.差别盈利分析法B.贡献毛益分析法C.安全边际法D.线性规划法5.某公司有一项投资,预计收益的期望值是200万元,标准离差率是18.25%。

若该项目的风险系数为80%,有关年度的货币时间价值为7%,则其预期风险报酬为()A.110.2万元B.135.2万元C.187.3万元D.200万元6.内部转移价格的制定应该公平合理,即内部价格的制定应该遵循()A.全局性原则B.激励性原则C.自主性原则D.可控性原则7.采用指数平滑法进行预测时,选取的权数应该是()A.越是远期的资料,权数应该越大B.越是近期的资料,权数应该越小C.越是近期的资料,权数应该越大D.远期和近期的资料的权数应该相等8.在确定制造费用的标准成本时,其中的数量标准就是生产单位产品所需用的直接人工工时,而价格标准则是指()A.销售量标准B.制造费用预算标准C.生产状况标准D.制造费用分配率标准9.在单价和单位变动成本不变的情况下,变动成本总额的变动率与贡献毛益总额的变动率的关系是()A.前者大B.相等C.后者大D.无法确定10.产品单位售价下降的最大限度是()A.边际收入=边际成本B.边际收入>边际成本C.边际收入<边际成本D.边际收入=011.成本中心与费用中心的区别在于()A.前者主要为企业提供一定的专业性劳务,而后者可以为企业提供一定的物质产品B.费用中心在企业外部没有相应的销售市场C.对二者的考核与评价的依据不同D.成本中心在外部有相应的销售市场12.某投资中心2004年实现利润20000元,投资额为100000元,预期最低投资收益率为12%,则该中心的剩余利润为()A.2400元B.8000元C.96000元D.97600元13.下列表述中正确的是()A.安全边际量与安全边际率都是正指标,其数值越大,企业经营的安全程度越大B.安全边际率是保本作业率的倒数C.安全边际率越小越好,而保本作业率越大越好D.安全边际率与保本作业率均越大越好14.投资利润率指标的不足之处在于()A.不反映盈利能力B.不具有可比性C.缺乏全局观念D.引起短期行为15.在经济订货量控制模型中,随订货次数的增加而增加的成本是()A.订货成本B.平均库存量C.储存成本D.采购成本16.下面关于现金............。

完整版机械设计基础考试题库及答案

完整版机械设计基础考试题库及答案

《机械设计基础》考试题库一、名词解释1. 机械:2.机器:3.机构:4.构件:5.零件:6.标准件:7•自由构件的自由度数:8•约束:9.运动副:10.低副:11.高副:23.机构具有确定运动的条件:24.死点位置:25. 急回性质:26 .间歇运动机构:27.节点:28.节圆:29.分度圆:30.正确啮合条件:31.连续传动的条件:32.根切现象:33. 变位齿轮:34.蜗杆传动的主平面:35.轮系:36.定轴轮系:37.周转轮系:38螺纹公称直径:螺纹大径。

39 .心轴:40.传动轴:41.转轴:二、填空题1. 机械是(机器)和(机构)的总称。

2. 机构中各个构件相对于机架能够产生独立运动的数目称为(自由度)。

3. 平面机构的自由度计算公式为:(F=3n-2H-P H)。

4. 已知一对啮合齿轮的转速分别为m、n2,直径为D1、D2,齿数为Z1、Z2,则其传动比i= (m/n2)= (D2/D1)= (Z2/ Z1)。

5. 铰链四杆机构的杆长为a=60mm,b=200mm,c=100mm ,d=90mm。

若以杆C为机架,则此四杆机构为(双摇杆机构)。

6. 在传递相同功率下,轴的转速越高,轴的转矩就(越小)。

7. 在铰链四杆机构中,与机架相连的杆称为(连架杆),其中作整周转动的杆称为(曲柄),作往复摆动的杆称为(摇杆),而不与机架相连的杆称为(连杆)。

8. 平面连杆机构的死点是指(从动件与连杆共线的)位置。

9. 平面连杆机构曲柄存在的条件是①(最短杆与最长杆长度之和小于或等于其它两杆长度之和)②(连架杆和机架中必有一杆是最短杆)。

10. 平面连杆机构的行程速比系数K =1.25是指(工作)与(回程)时间之比为(1.25 ),平均速比为(1: 1.25 )o11. 凸轮机构的基圆是指(凸轮上最小半径)作的圆。

12. 凸轮机构主要由(凸轮)、(从动件)和(机架)三个基本构件组成。

13. 带工作时截面上产生的应力有(拉力产生的应力)、(离心拉应力)和(弯曲应力)。

全国2007年4月高等教育自学考试基础会计学试题

全国2007年4月高等教育自学考试基础会计学试题课程代码:00041一、单项选择题(本大题共20小题,每小题1分,共20分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。

错选、多选或未选均无分。

1.在借贷记账法下,账户借方登记增加数或减少数取决于()A.记账规则B.资金的平衡关系C.核算方法D.账户反映的经济内容性质2.科目汇总表核算形式的缺点之一是()A.只适用于经济业务量小的单位B.不能简化登记总账的工作量C.不能试算平衡D.不能反映经济业务的来龙去脉3.下列记账错误,可以通过试算平衡发现的是()A.重记某项经济业务B.漏记某项经济业务C.借贷方向相反D.借贷金额不一致4.下列各项中,会引起资产和负债同时增加的是()A.将现金存入银行B.赊购原材料C.以银行存款归还银行借款D.向银行借款偿还应付账款5.“预提费用”账户的期末借方余额,其性质属于()A.预提费用B.待摊费用C.期间费用D.生产费用6.下列账簿中,各单位都需设置的是()A.租入固定资产登记簿B.材料明细账C.现金日记账D.生产成本明细账7.编制资产负债表的理论依据是()A.复式记账B.记账规则C.会计等式D.试算平衡8.材料明细账账页的格式应采用()A.三栏式B.数量金额式C.借方多栏式D.贷方多栏式9.在借贷记账法下,账户的借方表示()A.费用的增加和收入的减少B.收入的增加和资产的减少C.利润的增加和负债的减少D.利润的增加和费用的减少10.“利润分配”账户年终结转后,借方余额表示历年积存的()A.未分配利润额B.已分配利润额C.未弥补亏损额D.已实现利润额11.融资租入固定资产视为承租企业的资产,体现了会计的()A.配比原则B.权责发生制原则C.谨慎原则D.实质重于形式原则12.简单会计分录是指()A.有借有贷的分录B.一借一贷的分录C.一借多贷的分录D.多借一贷的分录13.期初和期末余额均在借方的账户,一般属于()A.资产类账户B.负债类账户C.所有者权益类账户D.收入类账户14.下列各项中,属于负债的是()A.待摊费用B.预提费用C.管理费用D.财务费用15.在我国会计法规制度体系中,属于最高层次地位的是()A.《会计法》B.《企业会计准则》C.《企业财务通则》D.《企业会计制度》16.将某项经济业务所涉及的会计科目集中填列在一张记账凭证上的是()A.单式记账凭证B.复式记账凭证C.一次凭证D.记账编制凭证17.对财产清查结果进行账务处理的主要目的是保证()A.账表相符B.账实相符C.账证相符D.账账相符18.下列各项中,不应..直接计入当期损益的是()A.制造费用B.财务费用C.所得税D.管理费用19.将记账凭证分为收款凭证、付款凭证和转账凭证的依据是()A.凭证的来源B.凭证填制的手续C.凭证所包括的会计科目是否单一D.凭证所记录的经济业务是否与货币资金收付业务有关20.租入固定资产登记簿属于()A.备查账簿B.分类账簿C.序时账簿D.联合账簿二、多项选择题(本大题共10小题,每小题2分,共20分)在每小题列出的五个备选项中至少有两个是符合题目要求的,请将其代码填写在题后的括号内。

全国某年4月自考历年真题机械设计基础试题

全国2008年4月自考历年真题机械设计基础试题课程代码:02185一、单项选择题(本大题共20小题,每小题2分,共40分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。

错选、多选或未选均无分。

1.机器中各制造单元称为()A.零件B.构件C.机件D.部件2.在平面机构中,每增加一个高副将引入()A.0个约束B.1个约束C.2个约束D.3个约束3.铰链四杆机构的死点位置发生在()A.从动作与连杆共线位置B.从动件与机架共线位置C.主动件与连杆共线位置D.主动件与机架共线位置4.在铰链四杆机构中,若最短杆与最长杆长度之和小于其它两杆长度之和,则要获得双摇杆机构,机架应取()A.最短杆B.最短杆的相邻杆C.最短杆的对面杆D.无论哪个杆5.凸轮机构的从动件选用等加速等减速运动规律时,其从动件的运动()A.将产生刚性冲击B.将产生柔性冲击C.没有冲击D.既有刚性冲击又有柔性冲击6.在单圆销的平面槽轮机构中,当圆销所在构件作单向连续转动时,槽轮的运动通常为()A.双向往复摆动B.单向间歇转动C.单向连续转动D.双向间歇摆动7.当两个被联接件均不太厚,便于加工通孔时,常采用()A.螺栓联接B.螺钉联接C.双头螺栓联接D.紧定螺钉联接8.普通平键传递扭矩是靠键的()A.顶面B.底面C.侧面D.端面9.V带传动工作时,与带轮轮槽接触的是带的()A.底面B.顶面C.两侧面D.底面和两侧面10.一对渐开线标准圆柱齿轮要正确啮合,一定相等的是()A.直径B.宽度C.齿数D.模数11.高速重载齿轮传动中,当散热条件不良时,齿轮的主要失效形式是()A.轮齿疲劳折断B.齿面疲劳点蚀C.齿面磨损D.齿面胶合12.一对双向运转的齿轮传动,工作时在轮齿根部所受的弯曲应力变化特征可简化为()A.对称循环变应力B.脉动循环变应力C.静应力D.无规律变应力13.对比较重要的蜗杆传动,最为理想的配对材料组合是()A.钢和铸铁B.钢和青铜C.钢和铝合金D.钢和钢14.在蜗杆传动中,当其它条件相同时,减少蜗杆头数,则传动效率()A.提高B.降低C.保持不变D.或者提高,或者降低15.在下列联轴器中,属于刚性联轴器的是()A.万向联轴器B.齿式联轴器C.弹性柱销联轴器D.凸缘联轴器16.按承受载荷的性质分类,双万向联轴器的中间轴属于()A.传动轴B.心轴C.转轴D.钢丝软轴17.高速、重载下工作的重要滑动轴承,其轴瓦材料宜选用()A.锡基轴承合金B.铸锡青铜C.铸铝铁青铜D.耐磨铸铁18.一向心角接触球轴承,内径85mm,正常宽度,直径系列3,公称接触角15°,公差等级为6级,游隙组别为2,其代号为()A.7317B/P62 B.7317AC/P6/C2C.7317C/P6/C2 D.7317C/P6219.角接触球轴承和圆锥滚子轴承的轴向承载能力随公称接触角α的减小而()A.增大B.减小C.不变D.增大或减小随轴承型号而定20.回转件动平衡条件是分布在回转件上的各个偏心质量的()A.离心惯性力合力为零B.离心惯性力的合力矩为零C.离心惯性力合力及合力矩均为零D.离心惯性力的合力及合力矩均不为零二、填空题(本大题共10小题,每小题1分,共10分)请在每小题的空格中填上正确答案。

全国2007年4月高等教育自学考试

全国2007年4月高等教育自学考试英美文学选读试题Ⅰ.1.The work that presented, for the first time in English literature, a comp rehensive realistic picture of the medieval English society and created a whole gallery of vivid characters from all walks of life is most likely ____________. A.William Langland’ s Piers PlowmanB.Geoffrey Chaucer’s The Canterbury TalesC.John Gower’s Confession AmantisD.Sir Gawain and the Green Knight2.The tragedy of Dr. Faustus, the protagonist in Christopher Marlowe’s The Tragic History of Dr. Faustus , is the very fact that______________. A.man is confined to time B.he tried to join Africa to SpainC.he became a man without soul after he sold itD.he conjured up Helen, the lady who was partially responsible for the breaking-up of the Trojan War3.The sentence “Shall I compare thee to a summer’s day?” is the beginning line of one of Shakespeare’s ______________. A.comedies B.tragedies C.sonnets D.histories4.Paradise Lost is actually a story taken from ______________.A.the Renaissance B.the Old TestamentC.Greek Mythology D.the New Testament5.Spenser’s masterpiece _____________ is a great poem of its time.A.The Faerie Queene B.The Shepheardes CalenderC.The Canterbury Tales D.Metamorphoses6.______________ is the essence of the Renaissance.A.Poetry B.Drama C.Humanism D.Reason7.The most famous dramatists in the Renaissance England are Christopher Marlow e, William Shakespeare and ______________.A.John Milton B.John Marlowe C.Ben Jonson D.Edmund Spenser8.“To be, or not to be—that is the question”is a line taken from______________.A.Hamlet B.Othello C.King Lear D.The merchant of venice9.Francis Bacon’s essays are famous for their brevity, compactness and ______________. A.complicity B.complexity C.powerfulness D.mildness10.Literature of Neoclassicism is different from that of Romanticism in that _ _____________.A.the former celebrates reason, rationality, order and instruction while the l atter sees literature as an expression of an individual’s feeling and experiencesB.the former is heavily religious but the latter secularC.the former is an intellectual movement, the purpose of which is to arouse th e middle class for political rights while the latter is concerned with the pers onal cultivationD.the former advocates the “return to nature” whereas the latter turns to th e ancient Greek and Roman writers for its models.11.Daniel Defoe describes ______________ as a typical English Middle- class ma n of the eighteenth century, the very prototype of the empire builder or the pi oneer colonist.A.Tom Jones B.Gulliver C.Moll Flanders D.Robinson Crusoe12.______________ is a typical feature of Swift’s writings.A.Bitter satire B.Elegant styleC.Casual narration D.Complicated sentence structure13.The Pilgrim’s Progress by John Bunyan is often said to be concerned with the search for ___ ___________.A.material wealth B.spiritual salvationC.universal truth D.self- fulfillment14.Alexander Pope strongly advocated ______________ , emphasizing that literar y works should be judged by rules of order, reason, logic, restrained emotion, good taste and decorum.A.Sentimentalism B.Romanticism C.Idealism D.Neoclassicism15.“Metaphysical poetry” refers to the works of the 17th- century writers wh o wrote under the influence of ______________.A.John Donne B.Alexander Pope C.Christopher Marlowe D.John Milton16.It is generally regarded that Keats’ s most important and mature poems are in the form of ______________.A.ode B.elegy C.epic D.sonnet17.______________ is the most outstanding stream of consciousness novelist, wi th ___________ as his encyclopedia – like masterpiece .A.James Joyce, Ulysses B.E.M. Foster, A Passage to India C.D.H. Lawrence, Sons and Lovers D.Virginia Woolf, Mrs Dalloway18.Which of the following poems is a landmark in English poetry?A.Lyrical Ballads by William Wordsworth and Samuel Taylor ColeridgeB.“I Wandered Lonely as a Cloud” by William WordsworthC.“Remorse ”by Samuel Taylor ColeridgeD.Leaves of Grass Walt Whitman19.The literary form which is fully developed and the most flourishing during the Romantic Period is ______________.A.prose B.drama C.novel D.poetry20.Which of the following poems by T.S. Eliot is hailed as a landmark and a mo del of the 20th century English poetry?A.Poems 1909-1925 B.The Hollow ManC.Prufrock and Other Observations D.The Waste Land21.“My last Duchess” is a poem that best exemplifies Robert Browning’s ______________.A.sensitive ear for the sounds of the English languageB.excellent choice of wordsC.mastering of the metrical devicesD.use of the dramatic monologue22.Dickens’ works are characterized by a mingling of ______________ and patho s.A.humor B.satire C.passion D.metaphor23.Walt Whitman, whose ______________ established him as the most popular Amer ican poet of the 19th century.A.Leaves of Grass B.Go Down, MosesC.The Marble Faun D.As I Lay Dying24.______________ has always been regarded as a writer who “perfected the bes t classic style that American Literature ever produced”.A.Edgar Ellen Poe B.Walt WhitmanC.Henry David Thoreau D.Washington Irving25.The Romantic Period, one of the most important periods in the history of Am erican literature, stretches from the end of ______________ to the outbreak of ____________.A.the 17th century…the American War of IndependenceB.the 18th century…the American Civil WarC.the 17th century…the American Civil WarD.the 18th century…the U.S. – Mexican War26.Which of the following statements is NOT true of American Transcendentalism ?A.It can be clearly defined as a part of American Romantic literary movement. B.It can be defined philosophically as “the recognition in man of the capacit y of knowing truth intuitively”.C.Ralph Waldo Emerson was the chief advocate of this spiritual movement. D.It sprang from South America in the late 19th century.27.The theme of Washington Irving’s Rip Van Winkle is ______________.A.the conflict of human psycheB.the fight against racial discriminationC.the familial conflictD.the nostalgia for the unrecoverable past28.The unofficial manifesto for the Transcendental Club was ______________, Em erson’s first little book, which established him ever since as the most eloquent spok esman of New England Transcendentalism.A.The American Scholar B.Self— reliance C.Nature D.The Over—Soul29.Nathaniel Hawthorne held an unceasing interest in the “interior of the hea rt ”of man’s being. So in almost every book he wrote, Hawthorne discusses______________. A.love and hatred B.sin and evilC.frustration and self—denial D.balance and self—discipline30.In Young Goodman Brown by Hawthorne, the name of Goodman Brown’s wife is ______________, which also contains many symbolic meanings.A.Ruth B.Hester C.Faith D.Mary31.Which of the following statements might be true of the theme of Song of Mys elf by Whitman?A.This poem describes the growth of a child who learned about the world around him and improved himself accordingly.B.This poem shows the author’s cynical sentiments against the American Civil War.C.This poem reflects the author’s belief in Unitarianism or Deism.D.This poem reflects the author’s belief in the singularity and equality of all beings in value.32.In Moby---Dick, the white whale symbolizes ______________ for Melville, for it is complex, unfathomable, malignant, and beautiful as well.A.nature B.human society C.whaling industry D.truth33.Realism was a reaction against Romanticism or a move away from the bias tow ards romance and self—creating fictions, and paved the way to ______________. A.Cynicism B.Modernism C.Transcendentalism D.Neo—Classicalism34.Hemingway once described Mark Twain’s novel ______________ the one book from which “all modern American literature comes”.A.The Adventures of Huckleberry Finn B.The Adventures of Tom Sawyer C.The Gilded Age D.The Man That Corrupted Hadleyburg35.__________ is generally regarded as the forerunner of the 20th—century “stream—of—consciousness” novels and the founder of psychological realism.A.Theodore Dreiser B.William Faulkner C.Henry James D.Mark Twain36.Which of the following statements is NOT true of Emily Dickinson and her poetry?A.She remained unmarried all her lifeB.She wrote, 1,775 poems, and most of them were published during her life time C.Her poems have no titles, hence are always quoted by their first lines. D.Her limited private world has never confined the limitless power of her crea tivity and imagination.37.As a genre, naturalism emphasized ______________ as important deterministic forces shaping individualized characters who were presented in special and det ailed circum-stances.A.theological doctrines B.heredity and environmentC.education and hard work D.various opportunities and economic success38.Ezra Pound, a leading spokesman of the “______________” , was one of the most important poets in his time.A.Imagist Movemen B.Cubist Movement C.Reformist Movement D.Transcendentalist Movement39.Eugene O’Neill’s first full—length play, ______________, won him the first Pulitzer Prize. Its theme is the choice between life and death, the interaction of subjective and objective fac tors.A.Bound East for Cardiff B.The Hairy ApeC.Desire Under the Elms D.Beyond the Horizon40.Hemingway’s “Indian Camp ” is one of the fourteen short stories collected under the tit le of ______________. This title is very ironic because there is no peace at al l in the stories.A.Three Stories and Ten Poems B.Across the River and into the Trees C.The Green Hills of Africa D.In Our TimeⅡ.Reading Comprehension (16 points, 4 for each)41.“For oft, when on my couch I lieIn vacant or in pensive mood,they flash upon that inward eye”Questions:A.Identify the anthor and the title.B.What does the phrase “inward eye” mean?C.Write out the main idea of the passage in plain English.42.“The duties of her married life, contemplated as so great beforehand, seem ed to be shrinking with the furniture and the white vapour—walled landscape. The clear heights where she expected to walk in full communio n had become difficult to see even in her imagination; the delicious repose of the soul on a complete superior had been shaken into uneasy effort and alarmed with dim presentiment. When would the days begin of that active wifely devotion which was to strengthen her husband’s life and exalt her own?”Questions:A.Identify the author and the title of the story from which the passage is tak en.B.Explain the meaning of “the white vapour—walled landscape”C.How do you undersdand “the delicious repose of the soul on a complete super ior”?43.“It was you that broke the new wood,Now is a time for carving.We have one sap and one root—Let there be commerce between us.”Questions:A.Whom does the “us” refer to?B.What does the phrase “broke the new wood ” mean here?C.What is the intention of the poet in writing the poem “A Pact” from which these lines are taken?44.“There was music from my neighbor’s house through the summer nights. In his blue gardens men and girls came and w ent like moths among the whisperings and the champagne and the stars. At high t ide in the afternoon I watched his guests diving from the tower of his raft, or taking the sun on the hot sand of his beach while his two motor—boats slit the waters of the Sound, drawing aquaplanes over cataracts of foam. On week—ends his Rolls—Royce became an omnibus, bearing parties to and from the city between nine in t he morning and long past midnight, while his station wagon scampered like a bri sk yellow bug to meet all trains. And on Mondays eight servants, including an e xtra gardener, toiled all day with mops and scrubbing—brushes and hammers and garden—shears, repairing the ravages of the night before.”Questions:A.Identify the author and the title of the novel from which this passage is ta ken.B.What can you imply by reading this passage?C.What do the “moths ” symbolize?Ⅲ.Questions and Answers (24 points in all, 6 for each)45.William Shakespeare is one of the most remarkable playwrights the world has ever known.(1)Name his four greatest tragedies.(2)What are the characteristics of the four tragedies in common?(3)Briefly summarize each hero’s weakness of nature.46.“Though his fair daughter’s self, as I avowedAt starting, is my object. Nay, we’ll goTogether down, sir. Notice Neptune, though,Taming a sea horse, though a rarity,Which Claus of Innsbruck cast in bronze for me! ”The lines above are taken from Robert Browning’s “My Last Duchess.” Taking the whole poem into consideration, what kind of p erson do you think the duke is?47.What is generally the view Washington lrving expressed in his “Rip Van Win kle” about the radical changes that happened to the American society in his ti me?48.What is the most famous theme in Henry James’s fiction? And what is his favourite approach in characterization, which makes him different from Mark Twain and W.D. Howells as realists? Give two titles of his works in which this theme and this approach are employed.Ⅳ. Topic Discussion (20 points in all, 10 for each)49.Analyze the character of Jane Eyre based on the selection taken from Chapte r X X Ⅲ of Jane Eyre.50.Symbolism is an important literary practice in literature and it has been w idely used by many American writers. Discuss the way symboliom is used in Faulk ner’s story “A Rose for Emily.”2007年4月英美文学选读试题答案l.B 2. A 3.C 4.B 5. A 6. C 7. C 8. A 9. C 10. A 11. D 12. A 13. B 14.D 15. A 16. A 17. A 18. A 19. D 20. D 21. D 22. A 23. A 24. D 25.B 26. D 27. D 28.C 29. B 30. C 31.D 32. A 33. B 34. A 35. C 36.B 37. B 38. A 39. D 40. DII. Reading Comprehension (16 points in all, 4 for each)41. A. Wordsworth; I wondered lonely as a cloud B. human soul C. The poet expressed his love for the daffodils.42. A. George Eliot; Middlemarch B. The landscape covered with white snow.C. It refers to Dorothea' s dream of fulfilling something great by marrying somebody superior, some¬body who can guide her.43. A. Whitman and Pound (the Imagists) B. Made experiments with the conventions of the traditional poetryC. In this poem, Pound started to find some agreement between "Whitmanesque" free verse, which he had attacked for its carelessness in composition, and the " verse libre" of the Imagists who showed more concern for formal values.44. A. F. Scott Fitzgerald; The Great Gatsby? B. This passage describes Gatsby' s extravagance.C. Moths are used metaphorically to refer to those people who are drawn to the party simply for its glamour, for the wealth of Gatsby.III. Questions and Answers (24 points in all, 6 for each)45. A. Shakespeare's four greatest tragedies are: Hamlet, Othello, King Lear,and Macbeth.B. Each portrays somke noble hero, who faces the injustice of human life and is caught in a difficult situation and whose fate is closely connected with the fate of the whole nation.C. Each hero has his weakness of nature: Hamlet, the melancholic scholar; Othello' s inner weak¬ness is made use of by the outside evil force; the old king Lear who is unwilling to totally give up his power; and Macbeth' s lust for power stirs up his ambition and leads him to incessant crimes.46. A. His apparent intelligence, excellent taste for art superiority and aristocratic manners are paradoxi¬cal.B. hispride,jealousy and brutality.47. A. living laments the radical changes in his time, thinking that the changes have taken away some of the most endeared values in American life.B. Irving' s pervasive theme of nostalgia for the unrecoverable past is unforgettable.48. A. His most fanous theme is international theme.B. Psychological approachC. The Portrait of A Lady; Daisy MillerⅣ. Topic Discussion ( 20 points in all, 10 for each )49. A. Jane Eyre, an orphan child with a fiery spirit and a longing to love and be loved, a poor, plain,little governess who dares to love her master.B. In Chapter X X Ⅲ, Jane finds herself hopelessly in love with Mr. Rochester but she isaware that her love is out of the question. When forced to confront Mr. Rochester, she desperately and open¬ly declares her equality with him and her love for him.50. A. Rose, as a symbol of love, may refer to the love between Emily and the Northerner, yet used rath¬er ironically, in the way it is associated with decay and death in the story.B. Rose could also stand for the pity, sympathy, or the lament" we "shows for Emily.C. The pity and lament goes not only to Emily but all those who are imprisoned in the past and fail to adapt to the change.D. Discuss in relation to the story.。

2007年4月高等教育自学考试全国统一命题考试

2007年4月高等教育自学考试全国统一命题考试高等数学基础 试卷(考试时间:4月22日上午8:30-11:00)本试卷分为两部分,满分100分;考试时间150分钟.第一部分为选择题,1页至4页,共4页.应考者必须在“答题卡”上按要求填涂,不能答在试卷上. 第二部分为非选择题,5页至11页,共7页.应考者必须在试卷上直接答题.第一部分 选择题(共30分)一、单项选择题(本大题共30小题,每小题1分,共30分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其选出并将“答题卡”的相应代码涂黑.错涂、多涂或未涂均无分.1.已知点A(1,-1,2)和B(-2,1,0),则的坐标为( )A .{-3,-2,-2}B .{-3,2,-2}C .{3,-2,2}D .{3,2,2}2.已知a =2i +j ,b =-i -k ,,则3a -2b =( )A .8i -3j -2kB .3i -8j +2kC .8i +3j +2kD .2i -8j +3k3.空间坐标轴上的单位向量i ,j ,k 有性质( )A .x ×k =0, k ×j =0 , j ×i =0B .i ×j =k , k ×j =i , k ×i =jC .i ×j =k , j ×k =i , i ×k =-jD .i ×j =-k , j ×k =i , i ×k =j4.点(1,-2,1)到平面x +2y -2z -1=0的距离为( )A .2B .2C .35 D .6 5.平面x -z =0的位置特点是( )A .过x 轴B .过y 轴C .过z 轴D .平行于xz 面6.直线332211-=-=-z y x 与平面3x -z =0的位置关系是( ) A .平行 B .互相垂直 C .相交而不垂直 D .直线在平面上7.方程4922y x +=1在空间直角坐标系中表示( ) A .双曲线 B .双曲柱面 C .椭圆 D .椭圆柱面8.已知f (x )=⎩⎨⎧≥-<0,0,2x x x x ,则f (x 2)=( )A .-x 4B .-x 2C .x 2D .x 49.对于函数y =cos x ,限制x ∈〔0,π〕,则它的反函数y =arc cos x 的定义域和值域分别为( )A .〔-1,1〕和〔0,π〕B .〔0,π〕和〔-1,1〕C .〔-2π,2π〕和〔-1,1〕D .〔-1,1〕和〔-2π,2π〕 10.数列21,-32,43,- 54……,(-1)n +11+n n ,……( ) A .极限是1 B .极限是-1C .有两个极限1和-1D .没有极限11.已知∞→n lim a n =a ,则∞→n lim (a 2n +2a n +1)=( ) A .a 2+1 B .2a +1 C .1 D .(a +1)212.当x →0时,下列函数中极限为1的是( )A .f (x )=xx sin B .f (x )=sin x C .f (x )=x x cos D .f (x )=x 1 13.已知0lim x x →f (x )=a ,0lim x x →g (x )=b ,若f (x )≤g (x ),x ∈(-∞,+∞),则必有( )A .a <bB .a ≠bC .a ≤bD .a ≥b14.下列数列中n →∞时为无穷小量的是( )A .{n 1sin n }B .{n sin n1| C .{n sin n } D .{sin n } 15.下列函数中,x =1是f (x )的可去间断点的是( ) A .f (x )=x 1 B .f (x )= 11+x C .f (x )=⎪⎪⎩⎪⎪⎨⎧=≠1,211,1x x x D .f (x )= ⎪⎪⎩⎪⎪⎨⎧=≠+1,211,11x x x 16.已知f (x )= ⎩⎨⎧≥<0,30,0x x x ,在点x =0处f (x )( ) A .既不连续也不可导 B .不连续但可导C .连续但不可导D .既连续也可导17.已知f (x )=e cos x ,则f '(x )=( )A .e cos xB .e sin xC .sin x ·e cos xD .-sin x ·e cos x18.已知x +y =a ,则dxdy =( ) A .x y B .-x y C .y x D .-yx 19.设y =f (u )是可微函数,u 是x 的函数,则dy =( )A .f '(u )udxB .f '(u )dxC .f '(u )duD .f (u )du20.设f (x )在(a ,b )内可导,x 0∈(a ,b ),则( )A .f '(x 0)=0时,f (x 0)是极值B .f (x 0)是极值时,f '(x 0)=0C .f (x 0)是极小值时,f ″(x 0)>0D .f (x 0)是极大值时,f ″(x 0)<021.若函数F (x )是f (x )的一个原函数,则( )A .⎰F (x )dx =f (x )+CB .⎰F '(x )dx =f (x )+CC .⎰f (x )dx =F (x )+CD .⎰f '(x )dx =F (x )+C22.下列计算正确的是( ) A .⎰-221x a dx =arc sin x +C B .⎰+221x a dx =arc tan x +CC .⎰xdx sec =cscx +CD .⎰tan xdx =-1n | cos x |+C23.下列不等式成立的是( )A .B .C .D . 24.设f (x )为可导函数,且⎰03xf (t )dt =x 3,则f (3)=( )A .3B .1C .0D .32 25.设=0,则该等式成立的充分必要条件为( )A .k =0B .k =2C .k =-2D .k =2或-226.n 级排列n n -1 n -2…3 2 1的逆序数是( )A .0B .n -1C .n (n -1)D .2)1(-n n 27.矩阵的逆阵为( )A .B .C .D .28.矩阵A =的秩为( )A .3B .2C .1D .429.设矩阵A m ×n 有r (A)=r ,若r (A)<r (A b ),则线性方程组Ax =b ( )A .有解B .无解C .有无穷多解D .有唯一解30.齐次线性方程组Ax =0是线性方程组Ax =b 的导出组,则下列说法正确的是( )A .Ax =b 有无穷多个解时,Ax =0有非零解B .Ax =0只有零解时,Ax =b 有唯一解C .Ax =0只有零解时,A 可逆D .Ax =0一定有解第二部分 非选择题(共70分)二、填空题(本大题共10小题,每小题1分,共10分)请在每小题的空格中填上正确答案.错填、不填均无分.31.已知|a |=3,|b |=2,∠(a ,b )=3π,则a ·b =________________. 32.过点(1,-2,-1)且垂直于平面x -y +2z -5=0的直线的标准式方程为________________.33.已知f (x )在[-1,1]上连续,且取到最大值1,最小值0,则f (x )在[-1,1]上的值域为________________.34.已知f (x )=⎪⎪⎩⎪⎪⎨⎧=≠+1,311,1x x a x 是定义域上的连续函数,则常数a =________________. 35.若f (x )=3x 2-e x ,则f ″(0)=________________.36.若变换x =ψ(t )使⎰+x dx 1=⎰+dt t t 12,则ψ(t )=________________.37.设f (x )为(-∞,+∞)内周期为T 的连续函数,且,则=________________. 38.设n 阶行列式D =|a ij |=1,A ij 是D 中元素a ij 的代数余子式,则a 11A 11+a 21A 21+…+a n 1A n 1=________________.39.设A =,B =,则矩阵AB =________________.40.如果非齐次线性方程组Ax =b 的增广矩阵(A b )经初等行变换后化为,则该非齐次线性方程组的一般解为________________.三、计算题(一)(本大题共4小题,每小题4分,共16分)41.求通过点(2,1,-3)且平行于平面x -8y +2z +3=0的平面方程.42.求极限. 43.计算. 44.用公式A -1=|A |1A*,求A =的逆.四、计算题(二)(本大题共4小题,每小题7分,共28分)45.求以点(1,2,3)与点(-1,6,-5)所连线段为直径的球面方程.46.设y =ln(2-sin x ),求y ″|x =π.47.计算.48.若线性方程组有解,求a 的值.五、解答题(本大题共2小题,每小题8分,共16分)49.求函数y =2)1(4x x -的极值与拐点. 50.设平面图形由曲线y =sin x ,x 轴及直线x =0,x =2π围成. 1)求该图形的面积S .2)求该图形绕x 轴旋转形成的旋转体的体积V .。

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全国2007年4月高等教育自学考试

机械设计基础试题
课程代码:02185
一、单项选择题(本大题共20小题,每小题2分,共40分)
在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的
括号内。错选、多选或未选均无分。
1.一曲柄摇杆机构,若改为以曲柄为机架,则将演化为( )
A.曲柄摇杆机构 B.双曲柄机构
C.双摇杆机构 D.导杆机构
2.铰链四杆机构ABCD中,AB为曲柄,CD为摇杆,BC为连杆。若杆长lAB=30mm,lBC=70mm,
lCD=80mm,则机架最大杆长为( )
A.80mm B.100mm
C.120mm D.150mm
3.在下列平面四杆机构中,一定无急回特性的机构是( )
A.曲柄摇杆机构 B.摆动导杆机构
C.对心曲柄滑块机构 D.偏置曲柄滑块机构
4.在设计直动滚子从动件盘形凸轮机构时,若发生运动失真现象,可以( )
A.减少基圆半径 B.增大滚子半径
C.增大基圆半径 D.增加从动件长度
5.带传动正常工作时不能保证准确的传动比是因为( )
A.带存在弹性滑动 B.带容易变形和磨损
C.带在带轮上打滑 D.带的材料不符合虎克定律
6.在承受横向载荷的普通紧螺栓联接中,螺栓杆所受应力为( )
A.扭切应力 B.拉应力
C.扭切应力和拉应力 D.扭切应力或拉应力
7.普通平键长度的主要选择依据是( )
A.传递转矩的大小 B.轮毂的宽度
C.轴的的直径 D.传递功率的大小
8.链传动与带传动相比较,其主要优点是( )
A.工作时平稳、无噪声 B.制造费用低
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C.对环境要求高 D.能保持准确的平均传动比
9.渐开线齿轮的齿廓曲线形状取决于( )
A.分度圆 B.基圆
C.齿根圆 D.齿顶圆
10.在单向运转的齿轮上,如果齿轮的弯曲疲劳强度不够,首先出现疲劳裂纹的部位是
( )
A.受压侧的节线部分 B.受压侧的齿根部分
C.受拉侧的节线部分 D.受拉侧的齿根部分
11.开式齿轮传动的主要失效形式是( )
A.过载折断 B.齿面胶合
C.齿面点蚀 D.齿面磨损
12.设计一对渐开线标准斜齿圆柱齿轮传动,不应圆整的参数是( )
A.分度圆直径 B.齿轮宽度
C.传动中心距 D.齿数
13.蜗杆传动比的正确表达式为( )
A.1221ddnni B.2121ddnni

C.1221zznni D.1221ddi
14.对闭式蜗杆传动进行热平衡计算的主要目的是( )
A.防止润滑油受热后膨胀外溢,造成环境污染
B.防止润滑油温度过高而使润滑条件恶化
C.防止蜗轮材料在高温下机械性能下降
D.防止蜗轮蜗杆发生热变形后,正确啮合条件受到破坏
15.在下列联轴器中,属于刚性联轴器的是( )
A.万向联轴器 B.齿式联轴器
C.弹性柱销联轴器 D.凸缘联轴器
16.轴的强度计算公式22v)T(MM中折算系数是考虑( )

A.计算公式不准确 B.弯矩和转矩的循环特性不同
C.材料抗弯与抗扭的性能不同 D.强度理论的要求不同
17.型号为6310的滚动轴承,其类型名称为( )
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A.深沟球轴承 B.调心球轴承
C.滚针轴承 D.圆锥滚子轴承
18.轴承在基本额定动载荷作用下,运转106转时,发生疲劳点蚀的概率为( )
A.10% B.50%
C.70% D.90%
19.对于小型、低速或间歇运转的不重要的滑动轴承,应采用的润滑方式是( )
A.人工供油润滑 B.压力润滑
C.浸油润滑 D.滴油润滑
20.机械运转不均匀系数是用来描述机械运转不均匀程度的重要参数,其表达式为( )
A.2minmax B.minmax

C.minmaxminmax D.mminmax
二、填空题(本大题共10小题,每空1分,共10分)
请在每小题的空格中填上正确答案。错填、不填均无分。
21.当机构的原动件数目___________其自由度时,该机构具有确定的运动。
22.平底垂直于导路的直动推杆盘形凸轮机构,其压力角等于___________。
23.在外啮合槽轮机构中,主动拨盘与从动槽轮的转向___________。
24.根据工作原理分类,螺栓联接采用开口销与六角开槽螺母防松是属于___________防松。
25.带传动的主要失效形式是___________和打滑。
26.渐开线直齿圆柱齿轮传动的可分性是指___________不受中心距变化的影响。
27.闭式蜗杆传动的主要失效形式是___________或点蚀。
28.滚动轴承的典型结构是由内圈、外圈、保持架和___________组成。
29.工作时既承受弯矩又传递转矩的轴叫___________轴。
30.调节机械周期性速度波动的方法是在机械的转动构件上加一个转动惯量很大的
___________。
三、分析题(本大题共2小题,每小题6分,共12分)
31.已知在某一级蜗杆传动中,蜗杆为主动轮,转动方向如题31图所示,蜗轮的螺旋线方
向为左旋。试将两轮的轴向力Fa1、Fa2,圆周力Ft1、Ft2,蜗杆的螺旋线方向和蜗轮的
转动方向标在图中。
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32.已知某气缸用z个小径为d1的普通螺栓联接,作用在汽缸盖上的总轴向载荷为FΣ,单
个螺栓所受预紧力为F′,剩余预紧力为F″,螺栓的许用应力为[σ]。分析单个螺栓
所受总拉力F0的大小,并写出其强度条件公式。

四、计算题(本大题共4小题,每小题6分,共24分)
33.计算题33图所示机构的自由度,若含有复合铰链、局部自由度和虚约束,请明确指出。
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34.已知一对外啮合标准直齿圆柱齿轮传动的标准中心距a=200mm,传动比i12=4,大齿轮
齿数z2=80,*ah=1.0。试计算小齿轮的齿数z1,齿轮的模数m,分度圆直径d1、d2,齿

顶圆直径da1、da2。
35.在题35图所示复合轮系中,已知各轮均为标准齿轮,各轮齿数为:z1=18,z2=51,z2′=17,
z4=73,试求该轮系的传动比i1H,并说明轮1与系杆的转向关系。

36.某工程机械传动中轴承配置形式如题36图所示。已知轴承型号为30311,判别系数
e=0.35,内部轴向力为Fs=Fr/2Y,其中Y=1.7。当Fa/Fr≤e时,X=1,Y=0;当
Fa/Fr>e时,X=0.4,Y=1.7,两轴承的径向载荷Fr1=4000N,Fr2=5000N,外加轴向载
荷FA=2000N,方向如题36图,试画出内部轴向力Fs1、Fs2的方向,并计算轴承的当量
动载荷P1、P2。
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五、设计题(本大题共2小题,每小题7分,共14分)
37.题37图所示偏置直动尖端从动件盘形凸轮机构,凸轮廓线为一个圆,圆心为O1,凸轮
的转动中心为O。
(1)在图上作出基圆rb、偏距圆e。
(2)利用反转法原理,求凸轮从图示位置转过90°后,从动件的位移s、机构的压力
角α,在图上标注出来。
(不必作文字说明,但必须保留作图线。)

38.题38图所示轴系结构,按示例①所示,编号指出其他错误(不少于7处)。(注:不考
虑轴承的润滑方式以及图中的倒角和圆角)。
示例:①——缺少调整垫片
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