专升本模拟题(一)

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专升本考试大学语文模拟试题一套(附答案)

专升本考试大学语文模拟试题一套(附答案)

专升本考试大学语文模拟试题一套(总分:100.00,做题时间:90分钟)一、单项选择题(总题数:10,分数:32.80)1.下列词语中,有两个错别字的一组是( )(分数:3.30)A.啜泣层峦叠嶂嗑碰义愤填膺B.辑拿额手称庆坍塌班师回朝C.秸杆大有稗益赘述披肝沥胆D.摩娑厝火积薪巨擘见风驶舵√解析:本题考查考生对现代汉语字形的正确识记。

A项中“嗑碰”应为“磕”。

B项中“辑拿”应为“缉拿”。

C项中“大有稗益”应为“大有裨益”。

D项中“摩娑”应为“摩挲”,“厝火积薪”:厝,放置;薪,柴草。

把火放到柴堆下面。

比喻潜伏着很大危险。

“巨擘”:大拇指,喻在某一领域最杰出的人物。

“见风驶舵”中的“驶”应为“使”。

2.下列各句中,画线的成语使用恰当的一句是( )(分数:3.30)A.许多农民巧妙地将服装厂剪裁后丢弃的“下脚料”做成帘子,当做蔬菜大棚的“棉被”,这真是一念之差,变废为宝B.王大伯十分喜爱小动物,只要见到流浪的小猫小狗,他都想办法把它们喂饱,有的人对此感到不解,他却乐此不疲√C.文艺演出现场,身着盛装的表演者光着脚,微笑着,一边跳着傣族舞,一边向人们泼水致意,在场群众纷纷拍手称快D.厂长动情地说:“为了扭转目前不利的局面,我们采用一种新的对策,希望大家共同努力。

功败垂成,在此一举。

”解析:重点考查考生正确使用词语(包括成语和熟语)的能力。

A项中“一念之差”多指引起严重后果的念头,此处不当;C项中“拍手称快”多用来形容仇恨得到消除,正义得到伸张,或目的实现时的痛快心情。

此处不当。

D项中“功败垂成”指的是事情在接近成功的时候遭到失败,此处不当。

3.下列各句中,没有语病的一句是( )(分数:3.30)A.青藏铁路纵贯青海、西藏两省区,跨越青藏高原,是连接西藏与内地的一条具有重要战略意义的铁路干线√B.这家老字号食品厂规模不大,但从选料到加工制作都非常讲究,生产的食品一直都是新老顾客倍受信赖的C.天安门广场等七个红色旅游景点是否收门票的问题,国家旅游局新闻发言人已在记者招待会上予以否认D.中央财政将逐年扩大向义务教育阶段家庭经济困难的学生免费提供教科书,地方财政也将设立助学专项基金解析:该题重点考查考生辨析病句的能力。

2024年成考专升本高等数学(一)-模拟押题卷

2024年成考专升本高等数学(一)-模拟押题卷

2024年成考专升本高等数学(一)-模拟卷一、选择题:1~12小题,每小题7分,共84分.在每小题给出的四个选项中,只有一项是符合题目要求的. 1. 221lim x x x x →∞+=+ ( )A. -1B. 0C. 12 D. 12. 设函数 3()5sin f x x x =+, 则 (0)f '= ( )A. 5B. 3C. 1D. 03. 设函数 ()ln f x x x =-, 则 ()f x '= ( )A. xB. 1x -C. 1x D. 11x -4. 函数 32()293f x x x =-+ 的单调递减区间是 ( )A. (3,)+∞B. (,)-∞+∞C. (,0)-∞D. (0,3) 5. 23 d x x =⎰ ( ) A. 23x C + B. 5335x C + C. 53x C + D. 13x C +6. 设函数 ()||f x x =, 则 11()d f x x -=⎰ ( )A. -2B. 0C. 1D. 27. 设 ()f x 为连续函数, 且满足 0()d e 1xx f t t =-⎰, 则 ()f x =() A. x e B. x e 1- C. e 1x + D. 1x +8. 设 ()2214z x y =+, 则 2zx y ∂=∂∂ ( ) A. 2xB. 0C. 2yD. x y +9. (2,1,2),(1,21)=--=-a b , 则 ⋅=a b ( )A. -1B. -3C. 3D. 210. 余弦曲线 cos y x = 在 0,2π⎡⎤⎢⎥⎣⎦ 上与 x 轴所围成平面图形的面积为 ( ) A. 0 B. 1 C. -1 D. 211. 若 lim 0n n a →∞=, 则数项级数 1n n a ∞=∑ ( )A. 收敛B. 发散C. 收玫且和为零D. 可能收玫也可能发散12. 如果区域 D 被分成两个子区域 12,D D , 且12(,)5,(,)1D D f x y dxdy f x y dxdy ==⎰⎰⎰⎰,则 (,)D f x y dxdy =⎰⎰ ( )A. 5B. 4C. 6D. 1二、填空题:13~15小题,每小题7分,共21分13. 32234x t y t ⎧=+⎨=-⎩ 在 1t = 相应的点处切线斜率为 . 14. 求 2x x y = 的全微分 .15. {(,)01,03}D x y x y x =≤≤≤≤-∣, 求D d σ=⎰⎰ .三、解答题:16~18小题,每小题15分,共45分.解答应写出文字说明、证明过程或演算步骤16. 求微分方程 220x y y e'--= 的通解. 17. 求由方程 2y y xe -= 所确定的隐函数 ()y y x = 的导数 0x dydx =.18. 证明: 当 0x 时, 2ln(1)2x x x +-.参考答案1.【答案】D【考情点拨】本题考查了函数极限的知识点.【解析】 222111lim lim 111x x x x x x x →∞→∞++==++. 2. 【答案】 A【解析】可求得 2()35cos f x x x '=+, 则 (0)5f '=.3. 【答案】D【解析】 1()(ln )1f x x x x''=-=-. 4.【答案】D【解析】由题可得 2()6186(3)f x x x x x '=-=-, 令 ()0f x '<, 得 03x <<, 故单调墄区间为 (0,3).5.【答案】B 【解析】 25333 d 5x x x C =+⎰. 6.【答案】C【解析】 01101221101011()d ()d ?d 122f x x x x x x x x ---=-+=-+=⎰⎰⎰. 7.【答案】A【解析】 0()d e 1xx f t t =-⎰ 两边同时求导, 得 ()()e 1e x x f x '=-=. 8. 【答案】B【解析】 12z x x ∂=∂, 所以 20z x y ∂=∂∂. 9.【答案】D【解析】 a 21(1)2(2)(1)2⋅=⨯+-⨯+-⨯-=b10.【答案】B【解析】由题意得 2200cos sin 1S xdx x ππ===⎰, 故选 B. 11.【答案】D 【解析】 lim 0n n a →∞= 是级数 1n n a ∞=∑ 收敛的必要条件, 但不是充分条件, 从例子 211n n ∞=∑收敛可知 B 错误, 由11n n ∞=∑ 发散可知 A, C 错误, 故选 D. 12.【答案】C 【解析】根据二重积分的可加性, (,)6D f x y dxdy =⎰⎰, 应选 C.13.【答案】 13【解析】 212,6,3dy dx dy dy dt t t dt dt dx dt dx t ===⋅=, 当1t =时, 13dy dx =, 故切线的斜率为 1314.【答案】 22xydx x dy +【解析】 22z z dz dx dy xydx x dy x y∂∂=+=+∂∂. 15.【答案】 52【解析】积分区域为梯形区域,此二重积分的一样即为求梯形面积,故 (23)1522D d σ+⨯==⎰⎰. 16.【答案】 22x x y xe Ce =+ (C 为任意常数)【解析】由通解公式可得,()(2)(2)222222dx dx x x x x x x y e e e dx C e e e dx C xe Ce ----⎡⎤⎰⎰=⋅+=⋅+=+⎢⎥⎣⎦⎰⎰ ( C 为任意常数). 17.【答案】 2e【解析】方程两边同时关于 x 求导得 0y y y e xe y ''--⋅=, 当 0x = 时, 2y =,代人得 200x x dyy e dx '==== 。

专升本(高等数学一)综合模拟试卷1(题后含答案及解析)

专升本(高等数学一)综合模拟试卷1(题后含答案及解析)

专升本(高等数学一)综合模拟试卷1(题后含答案及解析)题型有:1. 选择题 2. 填空题 3. 解答题选择题1.极限等于( )A.eB.ebC.eabD.eab+b正确答案:C解析:由于,故选C。

知识模块:极限和连续2.在空间直角坐标系中,方程x2-4(y-1)2=0表示( )A.两个平面B.双曲柱面C.椭圆柱面D.圆柱面正确答案:A解析:由于所给曲面方程x2-4(y-1)2=0中不含z,可知所给曲面为柱面,但是由于所给方程可化为x2=4(y-1)2,进而可以化为x=2(y-1)与-z=2(y-1),即x-2y+2=0,x+2y-2=0,为两个平面,故选A。

知识模块:空间解析几何3.级数是( )A.绝对收敛B.条件收敛C.发散D.收敛性不能判定正确答案:A解析:依前述判定级数绝对收敛与条件收敛的一般原则,常常先判定的收敛性,由于的p级数,知其为收敛级数,因此所给级数绝对收敛,故选A。

知识模块:无穷级数填空题4.若函数在x=0处连续,则a=________。

正确答案:-2解析:由于(无穷小量乘有界变量),而f(0)=a+2,由于f(x)在x=0处连续,应有a+2=0,即a=-2。

知识模块:极限和连续5.若f’(x0)=1,f(x0)=0,则=________。

正确答案:-1解析:由于f’(x0)存在,且f(x0)=0,由导数的定义有知识模块:一元函数微分学6.设y=xe+ex+lnx+ee,则y’=________。

正确答案:y’=ee-1+ex+解析:由导数的基本公式及四则运算规则,有y’=ee-1+ex+。

知识模块:一元函数微分学7.曲线y=ex+x上点(0,1)处的切线方程为________。

正确答案:由曲线y=f(x)在其上点(x0,f(x0))的切线公式y-f(x0)=f’(x0)(x-x0),可知y-1=2(x-0),即所求切线方程为y=2x+1。

解析:注意点(0,1)在曲线y=ex+x上,又y’=ex+1,因此y’|x=0=2。

专升本模拟试题及答案

专升本模拟试题及答案

专升本模拟试题及答案一、单项选择题(每题2分,共20分)1. 在下列选项中,哪一个是正确的?A. 地球是平的B. 地球是圆的C. 地球是三角形D. 地球是正方形答案:B2. 以下哪个选项不是计算机的输入设备?A. 键盘B. 鼠标C. 打印机D. 扫描仪答案:C3. 以下哪项不是中国四大发明之一?A. 造纸术B. 指南针C. 火药D. 望远镜答案:D4. 以下哪个选项是正确的数学表达式?A. 2 + 3 = 5B. 2 * 3 = 6C. 2 / 3 = 0.6D. 2 - 3 = -1答案:D5. 以下哪个选项是正确的化学方程式?A. H2 + O2 = H2OB. H2 + O2 = 2H2OC. 2H2 + O2 = 2H2OD. H2 + O2 = 2HO答案:C6. 在下列选项中,哪一个是正确的物理定律?A. 牛顿第一定律B. 牛顿第二定律C. 牛顿第三定律D. 所有选项答案:D7. 以下哪个选项是正确的生物分类?A. 动物界、植物界、微生物界B. 动物界、植物界、真菌界C. 动物界、植物界、细菌界D. 动物界、植物界、病毒界答案:B8. 在下列选项中,哪一个是正确的历史事件?A. 秦始皇统一六国B. 秦始皇统一七国C. 秦始皇统一八国D. 秦始皇统一九州答案:A9. 在下列选项中,哪一个是正确的地理概念?A. 赤道是最长的纬线B. 赤道是最短的纬线C. 经线是最长的纬线D. 经线是最短的纬线答案:A10. 在下列选项中,哪一个是正确的文学流派?A. 浪漫主义B. 现实主义C. 现代主义D. 所有选项答案:D二、多项选择题(每题3分,共15分)1. 以下哪些是计算机的输出设备?A. 显示器B. 打印机C. 键盘D. 鼠标答案:A、B2. 以下哪些是英语中的时态?A. 现在进行时B. 过去完成时C. 将来进行时D. 现在完成时答案:A、B、D3. 以下哪些是人体必需的微量元素?A. 铁B. 锌C. 钙D. 钠答案:A、B4. 以下哪些是常见的编程语言?A. JavaB. PythonC. C++D. Ruby答案:A、B、C、D5. 以下哪些是联合国的五个常任理事国?A. 中国B. 法国C. 俄罗斯D. 德国答案:A、B、C三、判断题(每题1分,共10分)1. 地球是太阳系中最大的行星。

计算机专升本考试模拟试卷(一)

计算机专升本考试模拟试卷(一)

计算机专升本考试模拟试卷(一)一、选择题(下列各题A)、B)、C)、D)四个选项中,只一个选项是正确的)1. 在Word的编辑状态,当前文档中有一个表格,选定列后,单击表格菜单中"删除列"命令后()。

A.表格中的内容全部被删除,但表格还存在B.表格和内容全部被删除C.表格被删除,但表格中的内容未被删除D.表格中插入点所在的列被删除2. 十进制数8000转换为等值的八进制数是()。

A.571(O)B.57100(O)C.175(O)D.17500(O)3. 下列设备中,既能向主机输入数据又能接受主机输出数据的是()。

A.显示器B.扫描仪C.磁盘存储器D.音响设备4. 下列操作中,()不能关闭FrontPage应用程序。

A.单击“关闭”按钮B.单击“文件”菜单中的“退出”C.单击“文件”菜单中的“关闭”D.双击标题栏左边的控制菜单框5. 在Excel 清单中,()。

A.只能将标题行冻结B.可以将任意的列或行冻结C.可以将A列和1、2、3行同时冻结D.可以将任意的单元格冻结6. CRT显示器的像素光点直径有多种规格,下列直径中显示质量最好的是()mm。

A.0.39B.0.33C.0.31D.0.287. 软盘不加写保护,对它可以进行的操作是()。

A.只能读盘,不能写盘B.只能写盘,不能读盘C.既能读盘,又能写盘D.不能读盘,也不能写盘8. 软件与程序的区别是()。

A.程序价格便宜、软件价格昂贵B.程序是用户自己编写的,而软件是由厂家提供的C.程序是用高级语言编写的,而软件是由机器语言编写的D.软件是程序以及开发、使用和维护所需要的所有文档的总称,而程序是软件的一部分9. 微型计算机中使用的人事档案管理系统,属下列计算机应用中的()。

A.人工智能B.专家系统C.信息管理D.科学计算10. 下列四个不同进制的无符号整数中,数值最小的是()。

A.10010010(B)B.221(O)C.147(D)D.94(H)11. 局域网的网络软件主要包括网络数据库管理系统、网络应用软件和()。

山西省2024年专升本考试模拟试题 机械设计基础(一)

山西省2024年专升本考试模拟试题 机械设计基础(一)

山西省2024年专升本考试模拟试题机械设计基础(一)作者:***来源:《山西教育·招考》2024年第02期三、判断题(本大题共10小题,每小题1分,共计10分)1.在铰链四杆机构中,若以最短杆为机架,则该机构为双曲柄机构。

2.弹性滑动是带传动中不可避免的固有属性。

3.带传动传动平稳,噪声小,可以用在运动精度要求高的场合。

4.所有构件一定都是由两个以上零件组成的。

5.铰链四杆机构中,传动角γ越大,机构传力性能越高。

6.凸轮机构中,从动件按等速运动规律运动时引起刚性冲击。

7.V带型号中,截面尺寸最小的是Z型。

8.定轴轮系的传动比等于始末两端齿轮齿数之反比。

9.蜗杆传动一般用于传动大功率、大速比的场合。

10.闭式蜗杆传动的主要失效形式是蜗杆齿面的胶合。

四、简答题(本大题共4小题,每小题5分,共计20分)1.说出凸轮机构从动件常用运动规律,冲击特性及应用场合。

试述螺纹连接防松的方法。

2.说明带的弹性滑动与打滑的区别。

3.为什么闭式蜗杆传动必须进行热平衡计算?4.轴上零件的轴向固定方法主要有哪些种类?各有什么特点?(指出四种以上)五、计算题(本大题共5小题,每小题10分,共计50分)1.计算如图所示机构的自由度,如有复合铰链、局部自由度或虚约束的地方请明确指出。

2.某标准直齿圆柱齿轮,已知齿距p=12.566mm,齿数z=25,正常齿制。

求该齿轮的分度圆直径d、齿顶圆直径da、齿根圆直径df、基圆直径db、齿高h及齿厚s。

4.某标准斜齿轮减速器低速轴布局如图所示。

已知选用外圈窄边相对安装的30206轴承支承,齿轮转矩T=969Nm,齿轮分度圆直径d=208mm,螺旋角14°(tan14°取0.2493),作用在A点和B点的径向力为:FrA=1747.5N,FrB=1747.5N,内部轴向力为Fs=Fr/(2Y),Y=1.6,判别系数e=0.37(当Fs /Fr≤e时,X=1,Y=0;当Fs /Fr>e时,X=0.4,Y=1.6)。

山西省2024年专升本考试模拟试题 建筑基础(一)

山西省2024年专升本考试模拟试题 建筑基础(一)

山西省2024年专升本考试模拟试题建筑基础(一)作者:薛鹏飞来源:《山西教育·招考》2024年第02期第一部分建筑力学一、单项选择题(本大题共5小题,每小题2分,共计10分)1.刚体A在外力作用下保持平衡,以下说法中错误的是A.刚体A在大小相等、方向相反且沿同一直线作用的两个外力作用下必平衡B.刚体A在作用力与反作用力作用下必平衡C.刚体A在汇交于一点且力三角形封闭的三个外力作用下必平衡D.刚体A在两个力偶矩大小相等且转向相反的力偶作用下必平衡2.关于力对点之矩的说法错误的是A.力对点之矩与力的大小和方向有关,而与距心位置无关B.力对点之矩不会因为力矢沿其作用线移动而改变C.力的数值为零,或力的作用线通过矩心时,力矩为零D.互相平衡的两个力,对同一点之矩的代数和等于零第二部分建筑结构一、单项选择题(本大题共5小题,每小题2分,共计10分)1.混凝土在双向压应力作用下,一向的强度随另一向压应力的增加而A.增加B.减小C.不变D.不能确定2.普通房屋和构筑物的设计使用年限为A. 25年B. 50年C. 60年D. 100年3.正常使用极限状态验算时,采用A.荷载标准值及材料强度设计值B.荷载设计值及材料强度设计值C.荷载标准值及材料强度标准值D.荷载设计值及材料强度标准值4.关于结构的功能要求,下列说法中错误的是A.能承受可能出现的各种作用B.具有良好的工作性能C.具有卓越的节能、环保性能D.具有足够的耐久性能5.下述状态中,不属于结构承载能力极限状态的是A.结构倾覆B.结构失稳C.结构出现裂缝D.结构变为机动体系二、填空题(本大题共5小题,每空1分,共计10分)三、简答题(本大题共4小题,每小题5分,共计20分)1.什么是混凝土的疲劳强度?2.为何规定混凝土梁、板中纵向受力钢筋的最小间距和最小保护层厚度?3.确定钢筋混凝土梁中纵向受力钢筋最小配筋率的原则是什么?4.在钢筋混凝土受弯构件中配置纵向受压钢筋有何作用?四、计算题(10分)第三部分工程測量一、单项选择题(本大题共5小题,每小题2分,共计10分)二、判断题(本大题共5小题,每小题2分,共计10分)1.三角点、导线点、GPS控制点等测量符号,都为非比例符号。

专升本《大学语文》模拟试题含答案

专升本《大学语文》模拟试题含答案

专升本《大学语文》模拟试题含答案《大学语文》模拟试题一一、填空题1.《水经注》是北魏(XXX/XXX)为《》作的注,此书既是一部地理著作,也是一部散文佳作。

2.XXX,字(XXX),号东坡居士,四川(成都/眉山)人,北宋著名文学家。

3.《哈姆雷特》的作者是(英国/意大利)剧作家。

4.《忆傅雷》的作者是(XXX/XXX),他/她的主要作品有长篇小说《》(围城/洗澡)等。

5.XXX,法国杰出的(浪漫/现实)主义诗人、戏剧家和小说家。

代表作有《》等。

二、解释下列加点的词语1.晋侯饮XXX酒.2.XXX从台上观,见且XXX,大骇.3.自非亭午夜分,略无阙处..4.茕茕孑立,形影相吊.5.老吾老,以及人之老.3、简答题1.简述《江水》一文的主要内容。

2.试简要分析XXX的《江雪》一诗。

附《江雪》:“千山鸟飞绝,万径人踪灭。

孤舟蓑笠翁,独钓XXX。

”四、论述题试分析《秋夜》中梦境描写的作用。

五、作文题以“难忘**”为题,写一篇记叙文,字数不少于800字。

《大学语文》模拟试题一一、填空题(每空2分,共计20分)1.XXX,水经2.XXX,眉山3.英国,XXX4.XXX,洗澡5.浪漫,XXX/九三年(等)(说明:有错别字该空不得分。

)二、说明下列加点的词语(每小题3分,共计15分)1.饮:给酒喝。

动词的使动用法,即“使……饮”。

2.且:将要。

3.XXX:正正午。

4.吊:慰问。

5.老:尊敬,赡养。

三、简答题(每小题15分,共30分)1.简述《江水》一文的主要内容。

参考谜底:XXX的《江水》主要描写了瞿塘峡、巫峡的开凿,巫山、巫峡的地理位置,新崩滩的构成,大巫山挺秀巍峨的气势,相关的汗青记录和神话传说,和三峡两岸艳丽如画的四序风光。

2.试阐发XXX的《江雪》一诗。

参考答案:学生的分析在感悟诗中意境的同时要注意揭示出“渔翁寒江独钓”与XXX政治遭遇及其傲岸不屈个性间的关系,具体视学生结合诗作的分析情况酌情给分。

(说明:参考答案仅供参考,凡学生有一己合理之理解即可酌情给分。

山西省2024年专升本考试模拟试题 法学基础(一)

山西省2024年专升本考试模拟试题 法学基础(一)

山西省2024年专升本考试模拟试题法学基础(一)作者:胡雪妍来源:《山西教育·招考》2024年第02期第一部分法理学一、单项选择题(本大题共6小题,每小题2分,共计12分)1.法律主要体现的是()的意志。

A.整个社会B.统治阶级C.政党D.全民2.有些单行法规中关于违法责任的规定,表述为“依照《治安管理处罚条例》第X条”处理。

这种法律法规是一种A.确定性规则B.委任性规则C.适用性规则D.准用性规则3.能够直接引起法律关系产生、变更和消灭的条件或情况是A.法律权利B.法律义务C.法律后果D.法律事实4.社会主义法律的实施,一般分为执法、司法、守法和法律监督,其中司法的主体是A.国家行政机关B.国家权力机关C.国家监察机关D.国家审判机关和检察机关5.下列各种法律解释中,其效力同被解释的法律一样,具有普遍约束力的是A.立法解释B.司法解释C.学理解释D.任意解释6.下列关于法律与政治的一般关系说法中不正确的是A.法律与政治都受制约和反作用于一定的经济关系B.政治对法律具有影响和制约作用C.法律对政治具有确认、调整和影响作用D.在政治和法律的关系中,法律处于主导地位二、填空题(每空2分,共计8分)1.按照法的创制方式和表达方式不同,把法分成和。

2.法律关系的要素包括主体、和。

三、简答题(本大题共2小题,每小题8分,共计16分)1.简述法的基本特征。

2.简述法律解释的基本原则。

四、论述题(10分)试述社会主义法治理念的基本内涵。

第二部分民法五、单项选择题(本大题共5小题,每小题2分,共计10分)1.接受定金的一方不履行合同的,定金应当A.返还B.上缴国库C.双倍返还D.三倍返还2.山西省律师协会属于A.企业法人B.事业单位法人C.国家机关法人D.社会团体法人3.下列属于无效民事行为的是A.6岁的小王将父亲的高级相机以5 000元的价格卖到了二手店B.小红的父亲将小红关押在房间里数日,逼其嫁给了小王C.小冯趁小朱家中急需用钱,说服小朱将家中的名画低价卖给了自己D.小强将500万元的合同价款打印成了500元,并与对方签订了合同4.孤寡老人胡某生前立下遗嘱,写明在其死后存款归其学生王某所有,胡某死后,王某接受了存款,则王某取得存款的方式是A.法定继承B.遗嘱继承C.遗赠D.遗赠扶养协议5.5月3日,甲与乙达成了购买房屋的意向,5月5日双方正式签订了买卖合同,5月10日乙向甲交了钥匙,6月18日办理了所有权变更登记手续。

专升本模拟考试试题及答案

专升本模拟考试试题及答案

专升本模拟考试试题及答案一、选择题(每题2分,共20分)1. 下列哪个选项是正确的描述?A. 地球是平的B. 太阳从西方升起C. 月球是地球的卫星D. 金星是太阳系中最大的行星答案:C2. 以下哪项不是计算机的基本组成部分?A. 处理器B. 存储器C. 输入设备D. 打印机答案:D3. 根据题目描述,下列哪个选项是正确的数学公式?A. 圆的面积= πr²B. 圆的周长= 2πrC. 圆的面积= 2πrD. 圆的周长= πr²答案:B4. 在中国历史上,被称为“诗圣”的是哪位诗人?A. 李白B. 杜甫C. 白居易D. 王维答案:B5. 以下哪种语言不属于联合国官方语言?A. 英语B. 法语C. 德语D. 汉语答案:C6. 以下哪个选项是正确的化学方程式?A. 2H₂ + O₂ → 2H₂OB. 2H₂ + O₂ → H₂OC. 2H₂O → 2H₂ + O₂D. H₂ + O₂ → H₂O₂答案:A7. 以下哪个选项是正确的物理定律?A. 牛顿第一定律B. 欧姆定律C. 热力学第一定律D. 所有选项都是正确的答案:D8. 以下哪个选项是正确的生物分类?A. 界、门、纲、目、科、属、种B. 门、纲、目、科、属、种C. 纲、目、科、属、种D. 目、科、属、种答案:A9. 以下哪个选项是正确的历史事件顺序?A. 法国大革命、美国独立战争、英国工业革命B. 美国独立战争、法国大革命、英国工业革命C. 英国工业革命、美国独立战争、法国大革命D. 法国大革命、英国工业革命、美国独立战争答案:B10. 以下哪个选项是正确的计算机术语?A. 硬件B. 软件C. 操作系统D. 所有选项都是正确的答案:D二、填空题(每空2分,共20分)1. 计算机的三大核心部件包括____、____和存储器。

答案:处理器、输入/输出设备2. 光合作用是植物通过____将光能转化为化学能的过程。

答案:叶绿素3. 牛顿的第二定律表达式为 F = ____。

2023年山东专升本大学语文模拟题一

2023年山东专升本大学语文模拟题一

2023年山东专升本大学语文模拟题一考试采用闭卷、笔试形式。

试卷满分100 分,考试时间120 分钟。

一、单项选择题(每小题1 分,共6 分)1、《左传》的记史方式是( )A、国别体B、编年体C、纪传体D、本末体2、下列作品不属于巴金的“爱情三部曲”的是( )A、《雾》B、《雨》C、《电》D、《家》3. “饮冰室主人”指的是( )A、康有为B、梁启超 C.、谭嗣同 D、黄遵宪4、下列有关文学常识的表述,正确的一项是( )A、《上尉的女儿》一普希金一短篇小说《长恨歌》一自居易一叙事诗B、《春晓》一孟浩然一绝句《寄小读者》一冰心一散文C、《悭吝人》一莫里哀一戏剧《羊脂球》一莫泊桑一戏剧D、《屈原》一郭沫若一小说《文心雕龙》一刘勰一理论著作5、成语“狡兔三窟”出自()A、《史记》B、《左传》C、《战国策》D、《孟子》6、“千金纵买相如赋,脉脉此情谁诉”出自()A.周邦彦之手B.辛弃疾之手C. 吴文英之手D.晏几道之手二、多项选择题(每小题2 分,共4 分)1、“汉赋四大家”指司马相如、杨雄、班固、张衡,四人都有代表性的名篇传世,在当时及后世文坛影响深远,文誉其名。

对“汉赋四大家”代表作概括正确的几项是()A、司马相如: 《子虚赋》B、杨雄:《长扬赋》C、班固: 《二京赋》D、张衡: 《两都赋》2、下列表述正确的几项是( )A、茅盾的代表作品有长篇小说《子夜》,短篇小说《林家铺子》、《农村三部曲》等。

B、鲁迅的杂文思想深刻,文字锋利。

其杂文集有《二心集》、《野草》、《南腔北调集》等。

C、老舍的作品北京味儿浓郁,他的代表作品有《骆驼祥子》、《月牙儿》、《茶馆》等。

D、《激流三部曲》---—《雾》、《雨》、《电》是巴金的代表作。

三、填空题(每题1 分,共10 分)1、保存乐府诗最完备的总集是宋人______的《乐府诗集》。

2、夫名不正则言不顺, ____________,事不成则礼乐不兴。

(《论语.子路》)。

辽宁省专升本考试计算机模拟练习题一

辽宁省专升本考试计算机模拟练习题一

辽宁省专升本考试计算机模拟练习题一The document was finally revised on 2021专升本计算机模拟试卷(一)第一部分:计算机基础知识一.选择(40分,每个2分)1、RAM的特点是()。

A)断电后,存储在其内的数据将会丢失 B)存储在其内的数据将永久保存C)用户只能读出数据,但不能写入数据 D)容量大但存取速度慢2、第一台电子计算机诞生于()。

A.1958年年年年3、一个完整的计算机系统应当包括()。

A.计算机与外设 B.硬件系统与软件系统C.主机、键盘与显示器D.系统硬件与系统软件4.第4代电子计算机使用的电子元件是()A.电子管B.晶体管C.中小规模集成电路D.大规模和超大规模集成电路5.在计算机存储器的术语中,一个“Byte”包含8个()A. 字母B. 字长C. 字节D. 比特(位)6.计算机辅助设计的英文缩写是()A. CAMB. CAIC. CADD. CAT7.在计算机中,用来传送、存储、加工处理的信息表示形式是()A. 拼音简码B. ASCII码C. 二进制码D. 十六进制码8.计算机中央处理器(CPU)是指()A. 控制器与运算器B. 控制器与外设C. 运算器与内存贮器D. 存贮器与控制器9.十进制数23转化为二进制为().10111 C10.微机在工作中尚未进行存盘操作,突然电源中断,则计算机 ( )全部丢失,再次通电也不能恢复。

A.硬盘中的信息B.软盘中的信息C.硬盘、软盘中所有信息D.内存RAM中的信息11.打印机是一种()A. 输出设备B. 输入设备C. 存贮器D. 运算器12.Word中(格式刷)按钮的作用是()。

A.复制文本 B.复制图形 C、复制文本和格式 D.复制格式13、为了将隐藏的文件显示出来,通常在“资源管理器”中选择 ( )菜单中的文件夹选项。

A.编辑B.查看C.工具D.文件14、计算机病毒破坏的主要对象是()。

A)磁盘片 B)磁盘驱动器 C)CPU D)程序和数据15、在Windows中,要把图标设置为缩略图方式,应选择下面()。

2023年成人专升本考试英语模拟题及答案一

2023年成人专升本考试英语模拟题及答案一

成人高考专升本英语模拟试卷及答案一Ⅰ. Phonetics (10 Points)Directions:In each of the following groups of words, there are four underlined letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet.1.A. captain B. various C. Atlantic D. metallic2.A. beach B. beat C. beast D. great3.A. heat B. health C. already D. pleasant4.A. waste B. paste C. voyage D. snake5.A. fortune B. public C. Russia D. suffer6.A. familiar B. family C. blanket D. factory7.A. thrown B. follow C. brown D. shown8.A. nineteenth B. ninth C. southern D. fifth9.A. pull B. pollute C. true D. truth10.A. correct B. discover C. comfort D. come(50 points)Directions:There are 40 incomplete sentences in this section. For each sentence there are four choices markedA, B, C and D. Choose one answer that best completes the sentence and blacken the corresponding letter on the Answer Sheet.11. The old man found _______ on the floor.A. lying deadB. lying deathC. laying deadD. laying death12. Grandma has no water, please ________ some for her.A. takeB. carryC. fetchD. bring13. The shoes he wore made his _______ look funny.A. feetB. footsC. handD. foot14. This restaurant always _______ delicious dishes.A. givesB. offersC. haveD. serves15. There is _______ sugar. You needn’t go to buy any.A. plenty ofB. a large number ofC. a great manyD. plenty16. Hardly _______ sat down when the telephone rang.A. did IB. had IC. ID. have I17. The ______ candle is still _______.A. lit…burnedB. lighted…burningC. lit…burningD. lighted…burned18. _______ come into leaf or bloom is obviously a sign of spring.A. TreesB. The treesC. That treesD. What trees19. _______ in the open air, wet clothes can get dry easily.A. HangB. HangedC. HungD. To hang20. He doesn’t spend much time _______ his homework.A. inB. withC. onD. for21.-What do you think of it?-It just happened _______ we had expected.A. thatB. whichC. itD. as22. Jane, what do you think of Mr. Green?As ______ teacher, he ought to set _______ good example to the pupils.A. the…aB. a…aC. a…theD. / …the23. They found a _______ old woman ________ on the ground when the door was broken open.A. dying…lyingB. dead…liedC. death…layingD. died…lain24. _______, the children went to the park.A. It was a fine dayB. Being a fine dayC. It being a fine dayD. Because the fine day25. ________ in the strange city, poor Bill fell to ________.A. Lost…cryingB. Lost…cryC. Having been lost…cryingD. To lese…cry26. Don’t get off the bus until it ________.A. has stoppedB. stoppedC. will stopD. shall stop27. I took _______ tea than you.A. lessB. fewC. fewerD. little28. The squirrel was lucky that it just missed _______.A. catchingB. to be caughtC. being caughtD. to catch29. I must be off now. It’s time I _______ to school.A. goB. wentC. will goD. am going30. To serve the people means giving as _______ and ask for as _______ as possible.A. much…littleB. much…fewC. many…a littleD. more…less31. What we are doing _______ good to the people.A. areB. have beenC. isD. be32. John is _______ of the two students.A. clevererB. the cleverC. the clevererD. the cleverest33. He used to be a heavy smoker, _______?A. used heB. didn’t heC. doesn’t heD. wouldn’t he34. Rather than _______, he ran all the way home.A. walkB. walkedC. walkingD. to walk35. Get to the top of hill, ______ you can see the whole city.A. orB. butC. andD. so36. What you said sounds right. I’m considering _______ this job.A. acceptingB. acceptC. to acceptD. will accept37. _______ I came into the office, the teachers were having a meeting.A. WhileB. WhenC. OnceD. Since38. Half of those books _______ best-sellers.A. isB. areC. amD. was39. _______ Chicago is a beautiful city today, but _______ Chicago of the 1920s was a very dirty place.A. The…theB. /…/C. A…theD. /…the40. ______ he is, Tom knows a lot of things.A. Child asB. Clever asC. Fool althoughD. A boy as41. Is that the reason _______ you are in favor of the proposal?A. whatB. of whichC. whyD. for42. The train will _______ Beijing at about half past seven.A. arriveB. getC. reachD. reach to43. Nearly everybody _______ colds in winter.A. suffer fromB. suffers inC. suffers fromD. suffer for44. ______ that your son is well again, you no longer have anything to worry about.A. WhenB. AfterC. BeforeD. Now45. We never dared to ask him a question, _______?A. did weB. didn’t weC. dared weD. daredn’t we46. You seldom have to do the cooking, ________?A. have youB. haven’t youC. do youD. don’t you47. _______ no exercise-book, he had to write on a piece of paper.A. There wasB. There isC. There beingD. There having48.-Where _______ the camera? I can’t see it anywhere.-I _______ it right here. But now it’s gone.A. did you put…putB. have you put…have putC. had you put…was puttingD. had you put…have put49. In another year or so, you ______ all about it.A. would forgetB. forgetC. have forgottenD. will have forgotten50.-If that’s not yours, _______?-Probably John’s.A. whose else can it beB. whose else’s can it beC. who’s else can it beD. who else can it beⅢ. Cloze (10 points)Directions:For each blank in the following passage there are four choices given below and marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.This is an old story. People tell it to children all over the world. Cinderella’s father and mother _51_. She lived with her aunt. Her aunt had two daughters. All of them Cinderella because she was beautiful. They made her _52_ in the house all day long.One day, the Prince was _53_. The king asked all the ladies in the land to come to a great dance._54_ the dance the Prince would choose his wife.When Cinderella heard about the dance, she wanted to go. Her aunt and the ugly sisters laughed and said, “You can’t go.”Then they went off to the dance. Poor Cinderella sat by the fire _55_. _56_ she heard a gentle voice saying, “Don’t cry, Cinderella, you shall go to the dance. I will help you.”Cinderella _57_ and saw a little old lady. She waved her stick at Cinderella. Suddenly she was wearing a wonderful dress. “Now go to the dance.”said the little lady.Cinderella enjoyed the dance very much. The Prince danced with her _58_. Suddenly the clock began to strike twelve. She hurried back home. She lost one of her glass shoes _59_. The next day, the Prince sent men to all parts of the country with the glass shoe.“If anyone can wear this small shoe,”he said, “She must be the beautiful lady, and I will marry her.”When the men brought the shoe to the ugly sisters, they both pretended _60_ the shoe, but their feet were big and the shoe was small. The man laughed. “Let Cinderella try.”Said one of the men. Cinderella put the shoe on easily. Then the Prince married her, and they lived happily ever after.51.A. both were dead B. were both death C. were both died D. were both dead52.A. to do all the work B. did all the work C. do all the work D. doing all the work53.A. old enough to be married with B. old enough to marryC. old enough to marry withD. old enough to be married54.A. During the night of B. At the night of C. One the night of D. In the night of55.A. to cry B. crying C. to be crying D. to be cried56.A. Sudden B. All on sudden C. On sudden D. All of a sudden57.A. looked up B. looked at C. looked for D. looked down58.A. at that time B. at times C. all the time D. at one time59.A. on the steps B. within the steps C. in the steps D. under the steps60.A. to put on B. putting on C. to wear D. to have onⅣ. Reading Comprehension (60 points)Directions:There are four reading passages in this part. Each passage is followed by five questions. For each question there are four suggested answers marked A, B, C and D. Choose one best answer and blacken the corresponding letter on the Answer Sheet.Passage OneWhat’s the best way to protect a tender, green seedling from the hungry stomach of deer? Give the seedling bad breath!The same chemical that gives people bad breath after they have eaten garlic can save small trees from being eaten by animals.A kind of chemical selenium(硒), which is also found in garlic, is planted in the soil near a young tree. The tree’s roots absorb the selenium which is then carried to the leaves.From there the selenium is used to form a chemical called dimethyl selenide (乙烷硒化物)-the same chemical made in the human mouth after eating garlic. As deer wander around looking forfood, they smell the seedlings’leaves and leave the plants alone.The selenium is important. Why? Because each year deer eat millions of dollars’worth of trees farm seedlings.So far, selenium has been tested only on Douglas fir (枞树) seedlings, but researchers think they could protect fruit trees and garden plants, too.61. When people eat garlic, ________.A. they send out a horrible smellB. they are out of breathC. they will feel sickD. it is hard for them to breathe62. According to this passage the bad smell given off from those leaves is that of ______.the young trees absorb garlicthe roots of the young trees smell like garlicthe young trees aren’t fit for the deer to eatthe leaves of the young trees smell like garlic64. Up till the time the news was announced, this kind of chemical was used _______.A. all over the worldB. all over the United StatesC. on fruit trees and garden treesD. on Douglas fir young trees65. The best title of this passage is ________.A. Hungry Deer and Young TreesB. Why Don’t Deer Eat Young Fruit TreesC. Plants Saved by “Bad Breath”D. How to Protect Young TreesPassage TwoHair loss is one of those things we still do not understand. Science has, of course, shown that men are more likely than women to suffer major hair loss. Some kinds of hair loss are temporary (临时旳), an effect of illness. In those cases we can expect the hair to grow back.It all depends on whether the hair root is alive. If it is not, hair loss is permanent and nothing will help.Some daily loss of hair is a normal, healthy sign. Most people lose between 40 to 50 scalp hairs each day.Each of these scalp hairs grows for from two to six years and then rests. About three months later it is pushed out by a new hair growing from the same root.This is not something that should cause great concern.Something else we know is that normal hair loss is seasonal, with the most hair loss occurring in the fall. Everyone experiences a normal cycle of loss and growth.The problem of hair loss results when loss is greater than growth.The main cause of hair loss in men seems to be accumulation (积累) of a hormone (荷尔蒙) in the body. When that hormone reaches a certain level, the hair growing period is shortened and hair loss is the result. This is no cure for most cases of hair loss. This, however, is not the end of the world.66. According to science, _________.hair loss is a normal, healthy signman should pay special attention to hair lossit’s likely that men have more problems of hair lossmen lose more hair than women do67. The writer thinks _______.illness causes hair losshuman beings have no way to cure hair losshair loss happening in the fall is an effect of illnesshair loss is permanent68. We now know that the most hair loss happening in the autumn is ________.A. permanentB. healthy signC. seasonalD. nothing serious69. The sentence “This, however, is not the end of the world”means _______.man is sure to find the best way of curing his hair loss in the futurethe writer believes the earth exists for everwe can’t destroy the world by any meansthe last day will never come to our people70. The best title for the passage may be ________.A. Loss or GrowthB. Hair LossC. Healthy SignD. Change with SeasonsPassage ThreeOn the morning of November 18,1755, an earthquake shook Boston, Massachusetts. John Winthrop, a professor at Harvard College, felt the quake and awoke. “I rose,”Winthrop wrote, “and lighting a candle, looked on my watch, and found it was 15 minutes after four.”JohnWinthrop went downstairs to the grandfather clock. It had stopped four minutes before, at 4:11. Except for stopping the clock, the quake had only thrown a key from the mantel (壁炉台) to the floor.The clock had stopped because Winthrop had put some long glass tubes he was using for an experiment into the case for care. The quake had knocked the tubes over and blocked the pendulum (钟摆). Winthrop, therefore, had the exact time that the earthquake had hit Boston. He looked at the key on the floor. The quake had thrown it forward in the direction of the quake’s motion (运动) by a shock coming from the northwest, perhaps in Canada.71. The text proves that _______.the power of nature is terribleearthquakes happen most often during nighttime hoursthe direction of an earthquake can be discovereduniversities study the cause of earthquakes72. The text suggests that _________.A. Boston was badly destroyedB. earthquakes are common in BostonC. John Winthrop had difficulty sleepingD. John Winthrop was a scientist73. Which of the following is true?________.Some tubes were broken into pieces and stopped the old clockThe professor lit a candle because of power failureBoston is in the southeast of CanadaThe shocks were slight in one way74. The earthquake happened ________.A. several minutes before the professor awokeB. and the professor awoke at 4:15C. in the centre of BostonD. when John Winthrop felt it75. Choose the right order according to the text.a. The bed was shaking and John Winthrop awoke.b. John Winthrop looked attentively at this watch.c. John Winthrop got up to light a candle.d. The earthquake happened in Boston in 1755.e. John Winthrop knew the quake’s direction.f. John Winthrop knew the exact quake’s time.g. John Winthrop looked at the key on the floor.A. g, d, e, a, c, b, fB. d, a, c, b, f, g, eC. a, e, d, c, b, f, gD. e, d, g, b, c, a, fPassage FourOceanography has been defined as “The application of all sciences to the study of the sea”. Before the nineteenth century scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work.For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, letalone to ask what lay beneath the surface. The first time that the question “What is at the bottom of the oceans?”had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineer had to know the depth profile (起伏形状) of the route to estimate the length of cable that had to be manufactured.It was to Maury of the US Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings (测水深) were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea.The cable was laid, but not until 1866 was the connection made permanent and reliable. At the early attempts, the cable failed and when it was taken out for repairs it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in deeper parts of the sea.Within a few years oceanography was under way. In 1872 Thomson led a scientific expedition (考察), which lasted for four years and brought home thousands of samples from the sea. Their classification and analysis occupied scientists for years and led to five-volume report, the last volume being published in 1895.76. The proposal to lay a telegraph cable from Europe to America made oceanographic studies take on ________.A. an academic aspectB. a military aspectC. a business aspectD. an international aspect77. It was ________ that asked Maury for help in oceanographic studies.A. the American NavyB. some early intercontinental travelersC. those who earned a living from the seaD. the company which proposed to lay an undersea cable78. The aim of the voyages Maury was responsible for in the 1840s was _______.to make some sounding experiments in the oceansto collect samples of sea plants and animalsto estimate the length of cable that was neededto measure the depths of the two oceans79. “Defied”in the 5th paragraph probably means “________”.A. doubtedB. gave proof toC. challengedD. agreed to80. This passage is mainly about _______.A. the beginnings of oceanographyB. the laying of the first undersea cableC. the investigation of ocean depthsD. the early intercontinental communicationsⅤ. Writing (20 points)Directions:For this part, you are allowed 20 minutes to write a letter of about 80 words according to the following situation.你是Helen,要写一封信给Julie,对她和她旳丈夫昨日请你和你丈夫吃饭表达感谢,表达要回请他们,以答谢他们旳盛情款待。

专升本高等数学(一)分类模拟36

专升本高等数学(一)分类模拟36

专升本高等数学(一)分类模拟36(总分:100.01,做题时间:90分钟)一、选择题(总题数:3,分数:6.00)1.微分方程y"=y"的通解是______∙ A.y=c1x+c2e x∙ B.y=c1+c2e x∙ C.y=c1+c2x∙ D.y=c1x+c2x2(分数:2.00)A.B. √C.D.解析:2.对于微分方程y"+3y"+2y=e -x,利用待定系数法求其特解y*时,下面特解设法正确的是______∙ A.y*=Ae-x∙ B.y*=(Ax+B)e-x∙ C.y*=Axe-x∙ D.y*=Ax2e-x(分数:2.00)A.B.C. √D.解析:3.对于微分方程y"+y=sinx,利用待定系数法求其特解y*时,下面特解设法正确的是______(分数:2.00)A.y*=asinxB.y*=acosxC.y*=x(asinx+bcosx) √D.y*=asinx+bcosx解析:二、填空题(总题数:4,分数:8.00)4.设y 1 (x),y 2 (x)是二阶常系数线性微分方程y"+py"+qy=0的两个线性无关的解,则它的通解为 1.(分数:2.00)解析:y=c 1 y 1 (x)+c 2 y 2 (x),其中c 1,c 2为任意常数.5.二阶常系数齐次线性微分方程y"+2y=0的通解为 1.(分数:2.00)6.二阶常系数齐次线性微分方程y"-4y"+4y=0的通解为 1.(分数:2.00)解析:y=(c 1 +c 2 x)e 2x.7.微分方程y"+y"=0的通解为 1.(分数:2.00)解析:y=c 1 +c 2 e -x.三、解答题(总题数:16,分数:86.00)麦尔萨斯(Malthus)是常数,y>0),(分数:3.00)(1).求它的通解;(分数:1.50)__________________________________________________________________________________________ 正确答案:()解析:解分离变量两端积分得即lny=rx+c,y=e rx +c,即为所求的通解.(2).若给定初始条件y| x=0 =y 0,求特解.(分数:1.50)__________________________________________________________________________________________ 正确答案:()解析:解利用初值条件y| x=0 =y 0,得y 0 =e r·0+c =e c,故所求特解为y=y 0 e rx.此即通常所说的指数模型.设方程y"+y=0,(分数:12.00)(1).验证y=c 1 cost+c 2 sint是它的通解.(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解因为y=c 1 cost+c 2 sint,则y"=-c 1 sint+c 2 cost,y"=-c 1 cost-c 2 sint,代入原方程可得y"+y=(-c 1 cost-c 2 sint)+(c 1 cost+c 2 sint)=0,故y=c 1 cost+c 2 sint是y"+y=0的解.由于c 1和c 2是两个任意常数,故y=c 1 cost+c 2 sint是y"+y=0的通解.(2).给定初始条件y| x=0 =1,y"| x=0 =1,求特解.(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解将y| x=0 =1代入通解得1=c 1 cos0+c 2 sin0=c 1;将y"| x=0 =1代入y"=-c 1 sint+c 2 cost得1=-c 1 sin0+c 2 cos0=c 2,故所求满足初始条件y=| x=0 =1,y"| x=0 =1的特解为y=cost+sint.逻辑斯谛(Logistic)是常数,k为大于y的常数,y>0),(分数:6.00)(1).求它的通解;(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解分离变量两端积分得lny-ln(k-y)=rx+c,为所求通解.(2).若给定初始条件y| x=0 =y 0,求特解.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解由初值条件y| x=0 =y 0,得,所求特解为此即Logistic模型,它在许多领域中都有不同程度的应用.8.求xyy"=1-x 2的通解.(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解分离变量得两端积分得即即为所求通解.9.解方程y"=(2x+2y+3) 2.(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解作变换u=2x+2y+3,对x求导得由原方程,故分离变量得两端积分将u=2x+2y+3代入得原方程的通解arctan(2x+2y+3)=2x+c,(c为任意常数).10.解方程(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解令y=ux,对x求导得代入原方程得故两端积分得将代入得原方程的通解11.设g(x)为连续函数且满足g(x).(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解这是一个积分方程,因g(x)连续,x连续,故可导;又x 2可导,故可导,因此g(x)可导.方程两端对x求导数,得xg(x)=g"(x)+2x即g"(x)-xg(x)=-2x.这是一阶线性微分方程,利用通解公式求解由于p(x)=-x,f(x)=-2x,故(用公式求解时,计算不定积分一律不写常数).因此,由所给方程可知当x=0时,g(0)=0,代入上式,可得c=-2,故所求函数为本题也可以用一阶线性方程的常数变易法求通解.先求对应的齐次方程g"(x)=xg(x)的通解.分离变量得两端积分得即使用常数变易法,设两端对x求导得代入原非齐次方程得即积分得代回f(x)可得(分数:6.00)__________________________________________________________________________________________ 正确答案:()解析:解对|y|≠1,(1)|x|<1,有两端积分得arcsiny=arcsinx+c,或y=sin(arcsinx+c),因,又,故c∈(-π,π),因为若c=π,y=sin(arcsinx+π)=-π不是解;同理,c≠-π.(2)|x|>1有两端积分得此外方程还有解y=±1,故原方程的解为求下列齐次线性方程的通解:(分数:14.01)(1).y"-2y"-3y=0;(分数:4.67)__________________________________________________________________________________________ 正确答案:()解析:解由特征方程求出特征根后,写出通解.特征方程r 2 -2r-3=(r+1)(r-3)=0,特征根r 1 =-1,r 2 =3,通解为y=c 1 e -x +c 2 e 3x.(2).y"-2y"+y=0;(分数:4.67)__________________________________________________________________________________________ 正确答案:()解析:解特征方程r 2 -2r+1=(r-1) 2 =0,特征根r 1 =r 2 =1,通解为y=(c 1 +c 2 x)e x.(3).y"-2y"+5y=0.(分数:4.67)__________________________________________________________________________________________ 正确答案:()解析:解特征方程r 2 -2r+5=0,特征根r 1 =1+2i,r 2 =1-2i,通解为y=e x (c 1 cos2x+c 2 sin2x).13.求方程y"-4y"+3y=0当y| x=0 =6,y"| x=0 =10的特解.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解先求通解,其特征方程r 2 -4r+3=(r-1)(r-3)=0,特征根r 1 =1,r 2 =3,通解为y=c 1 e x +c 2 e 3x,且y"=c 1 e x +3c 2 e 3x.将初始条件x=0,y=6,y"=10代入上式得所求特解为y=4e x +2e 3x =2(2e x +e 3x ).14.求以y=(c 1 +c 2 x)e x为通解的二阶常系数齐次线性微分方程.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解所给问题是求解微分方程的逆问题.常用的有两种求解方法.先由通解写出所求二阶常系数齐次线性微分方程的特征根r 1和r 2,再写出相应的特征方程(r-r 1 )(r-r 2 )=0,r 2 =(r 1 +r 2 )r+r 1 r 2 =0,最后,按特征方程写出相应的微分方程y"-(r 1 +r 2 )y"+r 1 r 2 y=0.或利用微分法,消去通解中的任意常数,得到相应的微分方程.在本题中,由于二阶常系数齐次线性微分方程的通解y=(c 1 +c 2 x)e x,知其特征根是二重根r=1.相应的特征方程是(r-1) 2 =0,即r 2 -2r+1=0,故知相应的微分方程是y"-2y"+y=0.另解由于二阶常系数齐次线性微分方程的通解是y=(c 1 +c 2 x)e x (7.13)y"=(c 1 +c 2 +c 2 x)e x (7.14)y"=(c 1 +2c 2 +c 2 x)e x (7.15)由(7.15)-2×(7.14)+(7.13)可消去c 1,c 2,得y"-2y"+y=0为所求微分方程.15.已知二阶常系数齐次线性微分方程的两个特解是y 1 =1和y 2 =e 2x,求相应的微分方程.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解由于二阶常系数齐次线性微分方程的特解是y 1=1,y 2=e 2x,则原方程有特征根r 1=0,r 2=2,其特征方程是(r-0)(r-2)=0,即r 2 -2r=0,相应的微分方程是y"-2y"=0.16.求微分方程y"+y"-2y=e -x的通解.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解先求出齐次方程y"+y"-2y=0的通解.它的特征方程是r 2 +r-2=(r-1)(r+2)=0,特征根r 1 =1,r 2 =-2.通解为Y=c 1 e x +c 2 e -2x.再求y"+y"-2y=e -x的一个特解.因f(x)=e -x,即n=0,α=-1,由α=-1不是特征根,设其特解为y*=Ae -x,y*"=-Ae -x,y*"=Ae -x,代原方程中得Ae -x -Ae -x -2Ae -x≡e -x比较两边的系数得到,故其特解为从而原方程的通解是17.求微分方程y"+y"=x的通解.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解对应的齐次方程y"+y"=0,特征方程r 2 +r=r(r+1)=0,特征根r 1 =0,r 2 =-1,通解为Y=c 1 +c -x.2 e由于f(x)=x=xe 0·x,因α=0是特征方程的单根,故设y"+y"=x的特解为y*=x(Ax+B),y*"=2Ax+B,y*"=2A,代入y"+y"=x,得2A+2Ax+B≡x,比较两边系数得.特解为将y"+y"=0的通解和y"+y"=x的特解相加,得y"+y"=x的通解为18.求微分方程y"+4y=2sin2x的通解.(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解 y"+4y=0的特征方程r 2 +4=0有共轭复根r=±2i,其通解为Y=c 1 cos2x+c 2 sin2x.因为f(x)=2sin2x=e 0·x(0·cos2x+2sin2x),即α=0,β=2,A=0,B=2,又0+2i是特征根,应设原方程的特解(取k=1)为y*=x(acos2x+bsin2x),y*"=(a+2bx)cos2x+(-2ax+b)sin2x,y*"=(4b-4ax)cos2x+(-4a-4bx)sin2x,代入原方程得4bcos2x-4asin2x≡2sin2x.比较两边cos2x和sin2x的系数,得,其特解为从而原方程的通解为f(x)是连续函数,求f(x).(分数:3.00)__________________________________________________________________________________________ 正确答案:()解析:解因为x 3 +1可导,x、f(x)均是连续函数,故均可导,所以f(x)可导,于是因为3x 2可导,可导,故f"(x)可导,于是f"(x)=6x-f(x). (7.16)上式是二阶常系数线性方程.f"(x)+f(x)=0的特征方程r 2 +1=0,特征根r=±i,其通解为F(x)=c 1 cosx+c 2 sinx.求f"(x)+f(x)=6x的特解.因0不是特征方程的根,设特解(取k=0)F*=ax+b,则F*"=a,F*"=0,代入(7.16)得ax+b=6x,比较两边系数a=6,b=0,特解为F*=6x.由此得(7.16)的通解为:f(x)=F(x)+F*=c 1 cosx+c 2 sinx+6x.考虑初始条件:f(0)=1,代入上式,得c 1=1;再由f"(0)=0,代入f"(x)=-c 1sinx+c 2cosx+6,得c 2=-6,故所求函数为f(x)=cosx-6sinx+6x。

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专升本模拟题(一)I.Phonetics. (10 points with each of 1 point)Directions: In each of the following groups of words, there are four underlined letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation.1. A. quality B. quote C. queue D. question2. A. towel B. bestow C. clown D. frown3. A. threw B. drew C. blew D. sew4. A. personify B. person C. prison D. diction5. A. purse B. nurse C. purify D. curse6. A. ceiling B. receive C. seize D. veil7. A. salt B. talk C. chalk D. hall8. A. sail B. tailor C. nail D. dairy9. A. piece B. diet C. belief D. niece10. A. champion B. choice C. challenge D. champagneII.Vocabulary and Structure (30 points with each of 1 point) Directions: There are 30 incomplete sentences in this section. For each sentence there are four choices marked A, B, C and D. Choose one answer that best completes the sentence.11. Because of Einstein’s Theory of Relativity, scientists never again regardedthe world _________.A. as before they didB. as they regarded beforeC. as they did beforeD. as they had before12. You never told me you had seen the film, _________?A. had youB. hadn’t youC. did youD. didn’t you13. What do you think of Tom’s proposal that _________ on a play at theEnglish evening.A. we putB. we must putC. we shall putD. we would put14. _________ should come first was not clear to every member at the outset.A. This qualityB. That qualityC. What qualityD. It’s quality15. The equipment _________ out of order, the experiment has to be put off.A. isB. has beenC. is to beD. being16. _________ has been mentioned above, the size of a canal depends on thekind of boats going through it.A. WhatB. ItC. ThatD. As17. I wonder whether he will go and help _________.A. to let to fall the heavy boxB. let fall the heavy boxC. the heavy box let fallD. let the heavy box to fall18. They were believed _________ the problem beforehand.A. to have discussedB. to discussC. in discussingD. to have been discussed19. When he was in Japan, he was considering _________ a trip to China.A. to makeB. makingC. goingD. to go on20. “Can I have some chocolate, Mom? I’m hungry.”“You ________ be hungry. You’ve just had dinner.”A. can’tB. mustn’tC. needn’tD. won’t21. Wood furniture does not fall in value _________ properly handled andprotected.A. thoughB. unlessC. ifD. since22. He sold the vegetables at half price _________ allowed them to go bad.A. more thanB. rather thanC. other thanD. instead of23. Without the computer, we _________ the tremendous advances in medicalscience in the last few decades.A. could not makeB. should not makeC. can’t have madeD. would not have made24. Flying demands a much greater supply of energy _________ other forms oftransportation.A. than do mostB. than most doC. more than mostD. more than most do25. Not until 1959 _________ in obtaining this compound.A. had chemists succeededB. did chemists succeedC. that chemists succeededD. chemists succeeded26. To such straits _________ by his extravagance _________ he took tobegging.A. was he reduced…whichB. he was reduced…withC. did he reduce…thatD. was he reduced…that27. _________ you work hard, the prospects of promotion are good.A. UnlessB. Provided thatC. ForD. Once28. She never really get _________ the shock of hearing that her son had beenkilled in a mining accident.A. onB. overC. throughD. off29. Ships are _________ than planes that people take them mainly for pleasure.A. much more slowerB. too much slowerC. so much slowerD. very much slower30. He had just gone out. You ________ him up a little earlier.A. ought to ringB. should ringC. should have rungD. would have rung31. I cannot give you _________ for the type of car you sell because there is nodemand for it in the market.A. an orderB. a chargeC. a purchaseD. an expense32. As the shortage of certain metals approaches, others must be found to taketheir _________.A. shareB. roleC. placeD. shape33. It was difficult to guess what her _________ to the news would be.A. impressionB. reactionC. commentD. opinion34. You can’t afford to let the situation get worse. You must take _________ toput it right.A. decisionsB. directionsC. stepsD. sides35. The manager lost his _________ just because his secretary was ten minuteslate.A. moodB. temperC. mindD. passion36. Shelly had prepared carefully for her biology examination so that she couldbe sure of passing it on her first _________.A. intentionB. attemptC. purposeD. desire37. They are building the dam in _________ with another firm.A. comparisonB. associationC. touchD. tune38. In the advanced course students must take performance tests at monthly_________.A. gapsB. lengthC. distanceD. intervals39. Over a third of the population was estimated to have no _________ to thehealth service.A. accessB. assignmentC. exceptionD. assessment40. Professor Taylor’s talk has indicated that science has a very strong_________ on the everyday life of non-scientists as well as scientists.A. motivationB. perspectiveC. impactD. impressionIII. Cloze (20 points with each of 1 point)Directions: For each blank in the following passage, there are four choices given below and marked A, B, C and D. Choose the one that is most suitable and mark your answer.In a telephone survey of more than 2,000 adults, 21% said they believed thesun revolved (旋转) around the earth. An ___41___ 7% did not know which revolved around ___42___. I have no doubt that ___43___ all of these people were ___44___ in school that the earth revolves around the sun; ___45___ may even have written it ___46___ a test. But they never ___47___ their incorrect mental models of planetary (行星的) ___48___ because their everyday observations didn’t support ___49___ their teachers told them: People see the sun “moving” ___50___ the sky as morning turns to night, and the earth seems stationary (静止的) ___51__ that is happening.Students can learn the right answers ___52___ heart in class, and yet never combined them ___53__ their working models of the world. The objectively correct answer the professor accepts and the ___54___ personal understanding of the world can ___55___ side by side, each unaffected by the other.Outside of class, the student continues to pursue the ___56___ model because it has always worked well ___57___ that circumstance. Unless professors address ___58___ errors in students’ personal models of the world, students are not ___59___ to replace them with the ___60___ one.41. A) excessive B) extra C) additional D) added42. A) what B) which C) that D) other43. A) virtually B) remarkably C) ideally D) preferably44. A) learned B) suggested C) taught D) advised45. A) those B) these C) who D) they46. A) on B) with C) under D) for47. A) formed B) altered C) believed D) thought48. A) operation B) position C) motion D) location49. A) how B) which C) that D) what50. A) around B) across C) on D) above51. A) since B) so C) while D) for52. A) to B) by C) in D) with53. A) with B) into C) to D) along54. A) adult’s B) teacher’s C) scientist’s D) student’s55. A) exist B) occur C) survive D) maintain56. A) private B) individual C) personal D) own57. A) in B) with C) on D) for58. A) general B) natural C) similar D) specific59. A) obliged B) likely C) probable D) partial60. A) perfect B) better C) reasonable D) correct IV. Reading Comprehension (20 points with each of 2 points)Directions: There are two reading passage in thia part. Each passage is followed by five questions. For each question there are four suggested answers marked A, B, C and D. Choose one best answer.Passage OneQuestions 61 to 65 are based on the following passage:Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing(裁判)decisions that denied victory to their team. A researcher was appointed to study the performance of some top referees.The researcher organized an experimental tournament(锦标赛)involving four youth teams. Each match lasted an hour, divided into three periods of 20 minutes during which different referees were in charge.Observers noted down the referees’ errors, of which there were 61 over the tournament. Converted to a standard match of 90 minutes, each referee made almost 23 mistakes, a remarkably high number.The researcher then studied the videotapes to analyse the matches in detail. Surprisingly, he found that errors were more likely when the referees were close to the incident. When the officials got it right, they were, on average, 17 meters away from the action. The average distance in the case of errors was 12 meters. The research shows the optimum(最佳的)distance is about 20 meters.There also seemed to be an optimum speed. Correct decisions came when the referees were moving at a speed of about 2 meters per second. The average speed for errors was 4 meters per second.If FIFA, football’s international ruling body, wants to improve the standard of refereeing at the next World Cup, it should encourage referees to keep their eyes on the action from a distance, rather than rushing to keep up with the ball, the researcher argues.He also says that FIFA’s insistence that referees should retire at age 45 may be misguided. If keeping up with the action is not so important, their physical condition is less critical.61. The experiment conducted by the researcher was meant to _______.A) review the decisions of referees at the 1998 World CupB) analyse the causes of errors made by football refereesC) set a standard for football refereeingD) reexamine the rules for football refereeing62. The number of refereeing errors in the experimental matches was _______.A) slightly above averageB) higher than in the 1998 World CupC) quite unexpectedD) as high as in a standard match63. The findings of the experiment show that _______.A) errors are more likely when a referee keeps close to the ballB) the farther the referee is from the incident, the fewer the errorsC) the more slowly the referee runs, the more likely will errors occurD) errors are less likely when a referee stays in one spot64. The word “officials” (Line 2, Para.4) most probably refers to _______.A) the researchers involved in the experimentB) the inspectors of the football tournamentC) the referees of the football tournamentD) the observers at the site of the experiment65. What is one of the possible conclusions of the experiment?A) The ideal retirement age for an experienced football referee is 45.B) Age should not be the chief consideration in choosing a footballreferee.C) A football referee should be as young and energetic as possible.D) An experienced football referee can do well even when in poorphysical condition.Passage TwoQuestions 66 to 70 are based on the following passage:While still in its early stages, welfare reform has already been judged a great success in many states —at least in getting people off welfare. It’s estimated that more than 2 million people have left the rolls since 1994.In the past four years, welfare rolls in Athens Country have been cut in half. But 70 percent of the people who left in the past tow years took jobs that paid less than $6 an hour. The result: The Athens County poverty rate still remains at more than 30 percent — twice the national average.For advocates(代言人)for the poor, that’s an indication much more needs to be done.“More people are getting jobs, but it’s not making their lives any better,”says Kathy Lairn, a policy analyst at the Center on Budget and Policy Priorities in Washington.A center analysis of US Census data nationwide found that between 1995 and 1996, a greater percentage of single, female-headed households wereearning money on their own, but that average income for these households actually went down.But for many, the fact that poor people are able to support themselves almost as well without government aid as they did with it is in itself a huge victory.“Welfare was a poison. It was a toxin(毒素)that was poisoning the family,”says Robert Rector, a welfare-reform policy analyst. “The reform in changing the moral climate in low-income communities. It’s beginning to rebuild the work ethic(道德观), which is much more important.”Mr. Rector and others argued that once “the habit of dependency is cracked,” then the country can make other policy changes aimed at improving living standards.66. From the passage, it can be seen that the author _______.A) believes the reform has reduced the government’s burdenB) insists that welfare reform is doing little good for the poorC) is overenthusiastic about the success of welfare reformD) considers welfare reform to be fundamentally successful67. Why aren’t people enjoying better lives when they have jobs?A) Because many families are divorced.B) Because government aid is now rare.C) Because their wages are low.D) Because the cost of living is rising.68. What is worth noting from the example of Athens County is that _______.A) greater efforts should be made to improve people’s living standardsB) 70 percent of the people there have been employed for two yearsC) 50 percent of the population no longer relies on welfareD) the living standards of most people are going down69. From the passage we know that welfare reform aims at _______.A) saving welfare fundsB) rebuilding the work ethicC) providing more jobsD) cutting government expenses70. According to the passage before the welfare reform was carried out,_______.A) the poverty rate was loverB) average living standards were higherC) the average worker was paid higher wagesD) the poor used to rely on government aidV. Error Correction. (10 points with each of 2 points)Direction: There are five sentences in this section, each of them containing one mistake. Point it out and correct it.71. I’d say whenever you are going after something that is belonging to you,A Banyone who is depriving you of the right to have it is criminal.C D72. According to Darwin, random changes that enhance a species’ ability forAsurviving are naturally selected and passed on to succeeding generations.B C D73. Neither rain nor snow keeps the postman from delivering our letters whichA Bwe so much look forward to receive.C D74. Having been robbed off economic importance, those states are not likely toA B Ccount for very much in international political terms.D75. The message will be that neither the market nor the government is capableA Bof dealing with all of their uncontrollable practices.C DVI.Translation. Put the following into English. (10 points with each of 2 points)76.人与兽类不同,因为人能思维而且会说话。

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