06试卷及答案
微积分下册期末试卷及答案
评 阅 人
13、由确定,求.
评 分
评 阅 人
14、用拉格朗日乘数法求 在条件下的极值.
评 分
评 阅 人
15、计算.
评 分
评 阅 人
16、计算二重积分 ,其中 是由 轴及圆周 所围成的在第一象限内的区域.
评 分
评 阅 人
17、解微分方程.
评 分
评 阅 人
18、判别级数的敛散性.
评 分
评
阅
二、选择题(每小题3分,共15分) 分
卷 人
6、
的值为( ).
(A) (B) (C) (D)不存在
7、和在存在且连续是函数在点可微的( ).
(A) 必要非充分的条件 (C) 充分且必要的条件
(B) 充分非必要的条件 (D) 即非充分又非必要的条件
8、由曲面和及柱面 所围的体积是( ). (A) (B) (C) (D)
, 于是
,所以是函数的极大值点,且
…(4分) 对
有
,
,
, 于是
,
不是函数的极值点。
…(6分)
5、某公司可通过电台及报纸两种方式做销售某商品的广告.根据统计资
料,销售收入(万元)与电台广告费用(万元)的及报纸广告费用(万元)之间
的关系有如下的经验公式: .若提供的广告费用为万元,求相应的最优广
告策略.
的反函数为
。且时,。于是
12、求二重极限 .
解:原式
(3分)
(6分)
13、由确定,求.
解:设
,则
, ,
, (3分)
(6分) 14、用拉格朗日乘数法求 在条件下的极值. 解:
令 ,得 , , 为极小值点. (3分)
06-07大学物理A2试卷A及答案
中国计量学院200 6 ~ 200 7 学年第 1 学期《大学物理A(2) 》课程考试试卷( A )一、选择题(33分,每题3分)1、(4095)一定量的某种理想气体起始温度为T,体积为V,该气体在下面循环过程中经历三个准静态过程:(1)绝热膨胀到体积为2V;(2)等容变化使温度恢复到T;(3)等温压缩到原来的体积V,则在此循环过程中[]A、气体向外放热B、气体对外作正功C、气体内能增加D、气体内能减少2、(3151)一向右传播的简谐波在t时刻的波形如图所示,BC为波密介质的反射面,波由P点反射,则反射波在t时刻的波形图为[]3、(4089)有两个相同的容器,容积固定不变,一个盛有氨气,另一个盛有氢气(都看成刚性分子的理想气体),它们的压强和温度都相等,现将5J的热量传给氢气,使氢气温度升高,如果使氨气也升高同样的温度,则应向氨气传递的热量是:[]A、6 J.B、5 J.C、3 J.D、2 J.4、(3356)在单缝夫琅和费衍射实验中,若将单缝沿透镜光轴方向向透镜平移,则屏幕上的衍射条纹将如何变化[ ]A、间距变大B、间距变小C、不发生变化D、间距不变,但明暗条纹的位置交替变化5、(4383) 用频率为ν 的单色光照射某种金属时,逸出光电子的最大动能为E K;若改用频率为2ν 的单色光照射此种金属时,则逸出光电子的最大动能为:[]A、2 E K.B、2hν - E K.C、hν - E K.D、hν + E K.6、(3072)如图所示,一平面简谐波沿x轴正向传播,已知P点的振动方程为)cos(φω+=tAy,则波的表达式为[]A、}]/)([cos{φω+--=ulxtAy.中国计量学院200 6 ~200 7 学年第 1 学期《 大学物理A (2) 》课程试卷( A )第 2 页 共 5 页f )1-⋅s D 、}]/)([cos{0φω+-+=u l x t A y .7、 (3253) 一质点作简谐振动,周期为T .当它由平衡位置向x 轴正方向运动时,从平衡位置到二分之一最大位移处所需要的时间为 [ ] A 、T /12. B 、T /8.C 、T /6.D 、T /4.8、 (3165)在相同的时间内,一波长为λ的单色光在空气中和在玻璃中比较 [ ] A 、传播的路程相等,走过的光程相等. B 、传播的路程相等,走过的光程不相等. C 、传播的路程不相等,走过的光程相等. D 、传播的路程不相等,走过的光程不相等.9、 (4146) 理想气体向真空作绝热自由膨胀. [ ]A 、膨胀后,温度不变,压强减小.B 、膨胀后,温度降低,压强减小.C 、膨胀后,温度升高,压强减小.D 、膨胀后,温度不变,压强不变.10、(3639)自然光以布儒斯特角由空气入射到一玻璃表面上,反射光是 A 在入射面内振动的完全线偏振光.B 平行于入射面的振动占优势的部分偏振光.C 垂直于入射面振动的完全线偏振光.D 垂直于入射面的振动占优势的部分偏振光. [ ]11、 (5326) 两块平玻璃构成空气劈形膜,左边为棱边,用单色平行光垂直入射.若上面的平玻璃以棱边为轴,沿逆时针方向作微小转动,则干涉条纹 [ ] A 、间隔变小,并向棱边方向平移.B 、间隔变大,并向远离棱边方向平移.C 、间隔不变,向棱边方向平移.D 、间隔变小,并向远离棱边方向平移.二、填空题(27分,每空3分)12、(4040)图示的曲线分别表示氢气和氦气在同一温度下的麦克斯韦分子速分布情况。
A考试试卷06-07二
试卷第 1 页 共6 页承德医学院2006–2007学年第二学期期末临床医学、麻醉学、影像学专业(本)科2006级《组织学与胚胎学》课程考试试卷(A )一、单项选择题:本类型共50小题;每小题0.5分,共25分。
在每小题给出的四个选择中,只有一项是符合题目要求的,把所选择项前的字母填在答题卡上。
1、组成粗肌丝的蛋白的是A 、肌球蛋白B 、肌动蛋白C 、原肌球蛋白D 、肌钙蛋白E 、肌原蛋白2、下列哪种结构不属于细胞侧面连接A 、桥粒B 、中间连接C 、缝隙连接D 、紧密连接E 、半桥粒3、 中枢神经系统内有吞噬功能的神经胶质细胞是;A 、少突胶质细胞B 、星型胶质细胞C 、小胶质细胞D 、雪旺细胞E 、卫星细胞4、骨骼肌纤维收缩时,肌节的变化正确的是A 、I 带缩短B 、A 带缩短C 、I A 带均缩短D 、细肌丝缩短E 、粗肌丝缩短5、成人生精小管上皮细胞是A 、支持细胞和生精细胞B 、支持细胞和间质细胞C 、支持细胞和精原细胞D 、支持细胞和精子细胞E 、支持细胞和精子6、存在于肝的窦周隙的细胞是A 、嗜酸性细胞B 、嗜碱性细胞C 、肝巨噬细胞D 、贮脂细胞E 、浆细胞7、下列哪个器官被覆单层柱状上皮?A 、血管B 、小肠C 、皮肤D 、膀胱E 、食管 8、淋巴结内T 细胞聚集区是A 、淋巴小结B 、淋巴小结生发中心C 、副皮质区D 、髓索E 、淋巴窦9、下列那一项结构与扩大小肠的表面积无关A 、绒毛B 、微绒毛C 、小肠腺D 、纹状缘E 、环形皱襞10、关于壁细胞哪项错误A 、又称盐酸细胞B 、仅分布在胃底腺,以体、颈部多C 、细胞体积大,呈圆锥形或三角形D 、胞质嗜酸性E 、细胞核圆形居中11、关于中性粒细胞哪项错误A 、白细胞中数量最多的B 、核呈肾形C 、胞质中含有嗜天青颗粒D 、比红细胞大E 、有吞噬功能12、过碘酸希夫(PAS )反应显示A 、蛋白质B 、多糖C 、脂肪D 、核糖核酸E 、脱氧核糖核酸13、关于假复层纤毛柱状上皮哪项错误A 、细胞的表面均有纤毛B 、所有细胞都附于基膜上C 、属于单层上皮D 、细胞核位置高低不齐E 、含有分泌功能的杯状细胞14、下列哪一种细胞是从其它组织迁入疏松结缔组织的细胞A 、成纤维细胞B 、巨噬细胞C 、脂肪细胞D 、间充质细胞E 、纤维细胞试卷第 2 页 共6 页15、下列关于成纤维细胞描述错误的是A 、胞体较大,扁平有突起B 、胞质呈弱嗜碱性C 、功能为形成纤维和基质D 、处于功能旺盛状态时称纤维细胞E 、胞核较大,卵原形,可见核仁16、消化道管壁由内到外可分为A 、 内膜、中膜、外膜B 、内膜、中膜、浆膜C 、内膜、中膜、纤维膜D 、内皮、肌膜、纤维膜E 、黏膜、黏膜下层、肌层、外膜 17、气管腺位于A 、上皮B 、粘膜下层C 、外膜D 、固有层E 、中膜 18、主要组成肺泡结构的细胞是A 、Ⅰ型细胞B 、Ⅱ型细胞C 、巨噬细胞D 、柱状细胞E 、肥大细胞19、下列不属于含氮类激素的是A 、胺类B 、氨基酸衍生物C 、肽类D 、肾上腺皮质激素E 、蛋白质类激素20、关于甲状腺滤泡哪项错误A 、滤泡由单层上皮构成B 、上皮的形态一般为立方形 B 、 滤泡中央为滤泡腔,内充满胶质 D 、胶质为滤泡旁细胞合成C 、 E 、在滤泡上皮细胞之间或滤泡之间有滤泡旁细胞 21、骨骼肌纤维储存钙离子的结构是A 、肌浆B 、横小管C 、肌浆网D 、线粒体E 、肌红蛋白22、胎盘的组成是A 、基蜕膜与丛密绒毛膜B 、壁蜕膜与丛密绒毛膜C 、基蜕膜与平滑绒毛膜D 、包蜕膜与丛密绒毛膜E 、包蜕膜与平滑绒毛膜 23、下列不属于嗜碱性粒细胞的是A 、 胞质内含有嗜碱性颗粒B 、细胞核常呈"S"形或不规则形C 、胞质内含有肝素,组胺D 、参与抗过敏反应E 、在白细胞中数量最少24、神经元的下列特征哪个错误A 、细胞有突起B 、核大而圆C 、核仁明显D 、胞体内有神经原纤维E 、胞体及轴突内均有尼氏体 25、关于血管球,下列哪项不正确A 、位于肾小球内的一团盘曲的毛细血管B 、由入球微动脉和出球微动脉构成C 、入球微动脉较出球微动脉细D 、血管球内血压较高E 、毛细血管为有孔型26、小管位于皮质迷路内,管壁较薄,管腔大且规则,由单层立方上皮围成,核圆近腔面,胞质弱嗜酸性,刷状缘不明显,基底有纵纹。
大学英语(A)模拟试卷及答案2011Test06
全国高校网络教育公共基础课统一考试大学英语(A)模拟试卷(2010年修订版)Test 6(根据全国高校网络教育考试委员会2011年1月新颁考试大纲和题型进行了相应调整)Information for the Examinees:This examination consists of FOUR parts. They are:Part Ⅰ: Reading Comprehension (30 points, 25 minutes)Part Ⅱ: Vocabulary and Grammar (30 points, 25 minutes)Part Ⅲ: Translation (20 points, 10 minutes)Part IV: Writing (20 points, 30 minutes)The total marks for this examination is 100 points. Time allowed for completing this examination is 90 minutes).Section I: Reading Comprehension [30 points]Part 1: Questions 1-5 are based on this part. (15 points)Read the following passage and choose the best answer from A, B, C and D.Since World War II, there has been a clearly discernible trend, especially among the growing group of college students, toward early marriage. Many youths begin dating in the first stages of adolescence, “go steady” through high school, and marry before their formal education has been completed. However, emotional maturity is no respecter of birthday; it does not arrive automatically at twenty-one or twenty-five. Some achieve it surprisingly early, while others never do, even in three score years and ten.Many students are marrying as an escape, not only from an unsatisfying home life, but also from their own personal problems of isolation and loneliness. And it can almost be put down as s dictum that any marriage seldom solves one’s problems, more often, it merely makes them worse. Furthermore, it is doubtful whether the home is an institution that is capable of carrying all that the young are seeking to put into it. Young people correctly understand that their parents are wrong in believing that “success” is the ultimate good, but they erroneously believe that they themselves have found the true center of life’s meaning. Their expectations of marriage are essentially utopian and therefore incapable of fulfillment. They want too much, and disappointments are often bound to follow.Shall we, then, join the chorus of “Miseries” over early marriage? One cannot generalize: allearly marriage are not bad any more than all later ones are good. Satisfactory marriages are determined not by time, but by the emotional maturity of the partners. Therefore, each case must be judged on its own merits. If the early marriage is not an escape, if it is entered into with relatively few illusions or false expectations, and if it is economically feasible, why not? Good marriages can be made from sixteen to sixty, and so are bad ones. (301 words)1. According to this article the trend toward early marriage ______.A. was the result of the Great Depression of the 1930’sB. could not be easily determinedC. is one that could be clearly seenD. is a result of the emotional maturity of the young2. The author suggests that many of today’s early marriage are a result of ______.A. escapismB. theological dictumC. lack of formal educationD. convenience3. More often than not, early marriage will ______.A. not affect one’s problemsB. solve a person’s problemsC. intensify one’s problemsD. ease one’s problems4. The author states that the home as an institution is ______.A. overratedB. unworthy of worshipC. a god who can grant everything that you wish forD. probably not capable of being what many young people expect it to be5. Many young people who marry early believe that ______.A. their parents have found the true meaning of lifeB. they have found the true center of life’s meaningC. “success” is the ultimate goodD. to succeed is not at all importantPart 2: Questions 6-10 are based on this part. (15 points)Read the following passage and choose the best answer from A, B, C and D.It was 1985, and Rafe Esquith was beginning his third year of teaching in Los Angeles public schools. He faced a class of 40 sixth-graders from low-income homes where English rarely was spoken, and the best reader among them was two years below grade level.But to everyone’s surprise, he decided to teach them Shakespeare.Five families agreed to let their children play “Macbeth”for two hours after school. This proved to be so much fun that, within weeks, Esquith had 28 kids happily soaking up the drama of blood and betrayal in medieval Scotland. They were learning many words they had never heard before.But when Esquith asked a school district supervisor for official approval, he received this note: “Mr. Esquith, it is not appropriate that you stay after school to teach Shakespeare. It would be better if you did something with the children that is academic.”It would not be the last time that the narrow thinking of big-city school administration got in Esquith’s way. Yet the bearded, 6-foot-tall cyclone has proved that a teacher who thinks very big-much harder lessons, larger projects, extra class time can help disadvantaged children in ways most educators never imagine.This was difficult at first, until he stumbled upon a concept of teaching that is at the core ofhis success. American children, even those from hardworking immigrant cultures, have in Esquith’s view been wrongly taught that learning should always be fun, but teachers who think hard lessons are bad for kids from low-income homes. When faced with something difficult, such students don’t know what to do.The Declaration of Independence says Americans are entitled to the pursuit of happiness, but the emphasis in public schooling has been on the happiness, he believes. “What happened to pursuit?” Esquith said. So he has created an entirely new universe in his classroom, cherishing effort and the slogan, “There Are No Shortcuts”.As for their own dramatic performances, Esquith got around the original ban on his after- school “Macbeth”rehearsals by switching to Thornton Wilder’s “Our Town”. When that class finally performed the Shakespeare play, a school district supervisor showed up. The high-ranking district administrator came up afterwards and shook his hand. “Rafe”, she said, “I’ve never seen Shakespeare done better.”(376 words)6. It can be learned from the passage that Esquith’s students ______.A. liked the traditional teaching betterB. were relatively poor in intelligenceC. were mainly from immigrant familiesD. refused to cooperate with the new teacher7. At first, Esquith’s Shakespeare-teaching ______.A. won the support of the school authorityB. got slow response from the school authorityC. did not draw attention from the school authorityD. was not allowed by the school authority8. It is implied that most educator ______.A. fail to realize the potential of disadvantaged studentsB. fail to introduce fun into the learning of disadvantaged studentsC. are reluctant to admit the unfair treatment to disadvantaged studentsD. are unaware of the difficulty faced by disadvantaged students9. Esquith’s principle of teaching is different from the general one in that ______.A. he insists on giving harder lessons to more advanced studentsB. he places greater emphasis on hard work in students’ learningC. he pays less attention to students’ academic performancesD. he dismisses the concept of extra homework for students10. What is the main idea of the passage?A. An inspiring teacher wins the love and respect of his students.B. An experienced teacher contributes to the school and the students.C. An innovative teacher makes changes in the students.D. An optimistic teacher helps build confidence in the students.Section II: Vocabulary and Grammar [30 points]Part 1: Questions 11- 20 are based on this section. (10 points)Read the following sentences and choose the best answer from A, B, C and D.11. Scarcely had the car stopped ______ the cell phone began to ring.A. thanB. whenC. afterD. before12. The worst thing ______ television is that many people have become its slaves.A. aboutB. inC. withD. from13. When the girl heard the news, she could do nothing but ______ back home.A. goingB. wentC. to goD. go14. Her determination to ______ her goal of life motivated her to greater effort.A. retainB. attainC. maintainD. entertain15. This couple has two daughters, ______ of whom is working in the U.S.A. the youngerB. the youngestC. a youngerD. the young16. They ______ thankful to have the opportunity to further their studies.A. would like to beB. ought to beC. would rather beD. had better be17. Large fish usually ______ small fish.A. gatherB. take onC. feed onD. organize18. All I got was a busy ______ when I dialed his number.A. signB. noiseC. signalD. voice19. You should take care that you have not ______ any detail in the design.A. disappearedB. thrownC. deliveredD. neglected20. I won’t complain as long as I ______ where I want to go.A. will getB. getC. gotD. would getPart 2: Questions 21 - 30 are based on this section. (20 points)Read the following passage and fill in each blank by choosing the best answer from A, B, C and D.It is believed that the responsibilities for learning lie with the students. The (21) ______ student is considered to be one who is motivated to learn for the sake of (22) ______, not the one interested only in getting high grades. Sometimes homework is returned (23) ______ brief written comments but without a grade. Even if a grade is not given, the student is (24) ______ for learning the material assigned. When research is assigned, the professor expects the students to take it actively and complete it with minimum guidance. It is the (25) ______ responsibility to find books, magazines, and articles in the library. Professors do not have the time to explain how a university library works. Professors will help students who need it but (26) ______ that their students should not be too dependent on them. In the United States professors have many other duties (27) ______ teaching, such as administrative or research work. (28) ______, the time that a professor can spend with a student outside of class is (29) ______. If a student has problems with classroom work, the student should either (30) ______ a professor during office hours or make an appointment.21. A. poor B. ideal C. average D. disappointed22. A. fun B. work C. learning D. prize23. A. by B. in C. for D. with24. A. criticized B. innocent C. responsible D. dismissed25. A. student’s B. professor’s C. assistant’s D. librarian’s26. A. hate B. dislike C. like D. prefer27. A. but B. except C. with D. besides28. A. However B. Therefore C. Furthermore D. Nevertheless29. A. plentiful B. limited C. irregular D. flexible30. A. get B. annoy C. approach D. attachSection III: Translation [20 points]Translate the following four sentences into English.31.正是由于他在面试中表现不错,他才获得了这份工作。
06年南京南通中考试题及答案
2006年南通市初中毕业、升学考试数学本试卷分第Ⅰ卷(选择题)和第Ⅱ卷两部分.第Ⅰ卷1至2页,第Ⅱ卷3至8页.共130分.考试时间120分钟.考试结束,将本试卷和答题卡一并交回.第Ⅰ卷(选择题共28分)注意事项:1.答第Ⅰ卷前,考生务必将自己的姓名、考试号、科目名称用2B铅笔涂写在答题卡上.2.每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑.如需改动,用橡皮擦干净后,再选涂其它答案.不能答在试卷上.一、选择题(本题共12小题;第1~8题每小题2分,第9~12题每小题3分,共28分.每小题只有一个选项是正确的)1.某市今年1月份某一天的最高气温是3℃,最低气温是—4℃,那么这一天的最高气温比最低气温高A.—7℃B.7℃C.—1℃D.1℃2.64的立方根等于A.4 B.—4 C.8 D.—83.已知∠α=35°19′,则∠α的余角等于A.144°41′B.144°81′C.54°41′D.54°81′4.根据国家信息产业部2006年5月21日的最新统计,截至2006年4月底,全国电话用户超过7.7亿户.将7.7亿用科学记数法表示为A.7.7×1011B.7.7×1010 C.7.7×109 D.7.7×108 5.如图,AB∥CD ,直线EF分别交AB,CD于E,F两点,∠BEF的平分线交CD于点G,若∠EFG=72°,则∠EGF等于A.36°B.54°C.72 °D.108°数学试卷第1页(共8页)G(第5题)6. 某市对2400名年满15岁的男生的身高进行了测量,结果身高(单位:m )在1.68~1.70这一小组的频率为0.25,则该组的人数为A . 600人B . 150 人C .60人D . 15人7. 如图,已知P A 是⊙O 的切线,A 为切点,PC 与⊙O 相交于B .C 两点,PB =2㎝,BC=8㎝,则P A 的长等于 A . 4㎝ B . 16㎝ C . 20㎝ D . 25㎝8. 二元二次方程组⎩⎨⎧-==+10,3xy y x 的解是A . ⎩⎨⎧-==⎩⎨⎧=-=5,22,52211y x y x B . ⎩⎨⎧==⎩⎨⎧==5,22,52211y x y x C . ⎩⎨⎧=-=⎩⎨⎧-==5,22,52211y x y x D . ⎩⎨⎧-=-=⎩⎨⎧-=-=5,22,52211y x y x 9. 如图, ABCD 的周长是28㎝, ABC 的周长是22㎝,则AC 的长为A .6㎝B . 12㎝C .4㎝D . 8㎝10. 如图为了测量某建筑物AB 的高度,在平地上C 处测得建筑物顶端A 的仰角为30°,沿CB 方向前进 12 m 到达D 处,在D 处测得建筑物顶端A 的仰角为 45°,则建筑物AB 的高度等于A .6(3+1)mB . 6 (3—1) mC . 12 (3+1) mD .12(3-1)m11. 已知圆锥侧面展开图的圆心角为90°,则该圆锥的底面半径与母线长的比为A . 1∶2B . 2∶1C . 1∶4D .4∶112. 已知二次函数y =2 x 2+9x+34,当自变量x 取两个不同的值x 1、x 2时,函数值相等,则当自变量x 取x 1+x 2 时的函数值与A .x =1 时的函数值相等B . x =0时的函数值相等C . x =41时的函数值相等 D . x =-49时的函数值相等 ACP ·O第7题DCB A(第9题)(第10题)数学试卷 第2页 (共8页)第Ⅱ卷(共102分)注意事项:除作图可使用2B 铅笔外,其余各题请使用钢笔或圆珠笔直接答在试题卷中. C题号 二三Ⅱ卷总分 结分人 核分人 19~20 21~22 23~24 25~26 27 28 得分二、填空题 (本题共6小题;每小题3分,共18分.请把最后结果填在题中横线上) 13. 一个篮球需要m 元,买一人排球需要n 元,则买3个篮球和5个排球共需要_______元. 14. 正六边形的每一个内角的度数是___________°. 15. 在函数52-=x x y 中,自变量x 的取值范围是_____________.16.如图,DE 与△ABC 的边AB ,AC 分别相交于D ,E 两点,且DE ∥BC .若DE=2㎝,BC =3㎝,EC =32㎝,则AC =________㎝. 17. 用换元法解方程4112=-+-x x x x ,若设y x x=-1, 则可得关于的整式方程_______________________. 18. 如图,直线y =kx(k >0)与双曲线xy 4=交于A (x 1,y 1), B (x 2,y 2)两点,则2x 1y 2-7x 2y 1=___________. 三、解答题 (本题共10小题;共84分)(19~20题,第19题10分,第20题6分,共16分) 19.(1)计算0)15(282218-+--(2)解不等式组⎪⎩⎪⎨⎧+<+->+)6(3)4(4,5351x x xx数学试卷 第3页 (共8页)E D CBA第16题第18题20. 已知:△ABC (如图)求作:△ABC 的外接圆(要求:用尺规作图,保留作图痕迹,写出作法,不要求证明).BAC(21~22题,第21题 6分,第22题7分,共13分)21. 张栋同学到百货大楼买了两种型号的信封,共30个,其中买A 型号的信封用了1元5角,买B 型号的信封用了1元2角,B 型号的信封每个比A 型号的信封便宜2分.两种型号的信封的单价各是多少?22. 已知关于x 的一元二次方程x 2-(m -1)x +m +2=0.(1) 若方程有两个相等的实数根,求m 的值;(2) 若方程的两实数根之积等于m2-9m +2,求6 m 的值.数学试卷 第4页 (共8页)23.2006年2月23日《南通日报》公布了2000年~2005年南通市城市居民人均可支配收入情况(如图所示)根据图示信息:(1)求南通市城市居民人均可支配收入的中位数;(2)哪些年份南通市城市居民人均可支配收入比上一年增加了1000元以上?(3)如果从2006年开始,南通市城市居民人均可支配收入每一年比上一年增加a 元,那么到2008年底可达到18000元,求a的值.24.如图,已知AB是⊙O的直径,直线CD与⊙O相切于点C,AC平分∠DAB.(1)求证:AD⊥DC;(2)若AD=2,AC=5,求AB的长.DCA BO数学试卷第5页(共8页)25.已知抛物线y=a x2+b x+c经过A,B,C三点,当x≥0时,其图象如图所示.(1)求抛物线的解析式,写出抛物线的顶点坐标;(2)画出抛物线y=a x2+b x+c当x<0时的图象;(3)利用抛物线y=a x2+b x+c,写出为何值时,y>0.26.已知A=a+2,B= a 2-a+5,C=a 2+5a-19,其中a>2.(1)求证:B-A>0,并指出A与B的大小关系;(2)指出A与C哪个大?说明理由.数学试卷第6页(共8页)27. 已知:如图,O正方形ABCD的中心,BE平分∠DBC,交DC于点E,延长BC到点F,使CF=CE,连结DF,交BE的延长线于点G,连结OG.(1)求证:△BCE≌△DCF;(2)OG与BF有什么数量关系?证明你的结论;(3)若GE·GB=4-22,求正方形ABCD的面积.数学试卷第7页(共8页)28.如图,在平面直角坐标系中,O为坐标原点为,B(5,0),M为等腰梯形OBCD底边OB上一点,OD=BC=2,∠DMC=∠DOB=60°.(1)求直线CB的解析式;(2)求点M的坐标;(3)∠DMC绕点M顺时针旋转α(30°<α<60°)后,得到∠D1MC1(点D1,C1依次与点D,C对应),射线MD1交直线DC于点E,射线MC1交直线CB于点F,设DE=m,BF=n .求m与n的函数关系式.数学试卷第8页(共8页)2006年南通市初中毕业、升学考试数学试题参考答案一、选择题1 2 3 4 5 6 7 8 9 10 11 12 BACDBADCDACB二、填空题13. 3m +5n 14. 120 15. x >5 16. 2 17. 2y 2-4y +1=0 18. 20 三、解答题 19.12+ 1<x <2 20. 略 21. A 型号的信封单价是1角,B 型号的信封单价是8分 22. (1) -1或7 (2)4 23.(1)中位数是9119元 (2)2004、2005年南通市城市居民人均可支配收入比上一年增加了1000元以上 (3)1872 24.(1)略 (2)2.5 25. 抛物线y =223212++-x x 顶点(23,825) 当-1<x <4时, y >0 26. (1)B -A =(a -1)2+2 >0 所以 B >A (2)C -A =(a +7)(a -3) 因为a >2,所以a +7>0 从而当2<a <3时,A >C , 当a =2时, A =C ,当 a >3时,A <C27. (1)(2)略 (3)设BC=x ,则DC =x ,BD =x 2,CF =(2-1)x GD 2=GE ·GB=4-22 DC 2+CF 2=(2GD)2 即 x 2+(2-1)2x 2=4(4-22) (4-22)x 2=4(4-22) x 2=4 正方形ABCD 的面积是4个平方单位 28. (1)BC 解析式:y=353+-x (2) 略证 △ODM ∽△BMCMCDMBC OM BM OD == 设OM=x ,2×2=x (5-x ), x =1或4 M (1,0)或(4,0) (3)当M (1,0)时,△DME ∽△CMF ,42===BM OD CM DM CF DE CF =2+n ,DE =m ,∴2+n =2m ,即m =1+2n)40(<<n 当M(4 ,0) 时2===BM OD CM DM CF DE ∴m =2(2-n ),即m =4-2n )121(<<n。
2008-2009财务管理试卷及答案A卷(06工商) 景德镇陶瓷大学
C.普通年金终值系数D.普通年金现值系数3.在资本市场上向投资者出售金融资产如借款,发行股票和债券等,从而取得资金的活动是( )A.筹资活动B.投资活动C.收益分配活动D.资金运营活动 4. 若某股票的β系数为1,则下列表述正确的昰( ) A.该股票的市场风险大于整个市场股票的风险 B.该股票的市场风险小于整个市场股票的风险 C.该股票的市场风险等于整个市场股票的风险 D 该股票的市场风险与整个市场股票的风险无关5.根据营运资金管理理论,下列各项中不属于企业应收账款成本内容的是( )。
A.机会成本B.管理成本C.短缺成本D.坏账成本6.在不考虑筹款限制的前提下,下列筹资方式中资金成本最高的通常是( )。
A.发行普通股B.留存收益筹资C.长期借款筹资D.发行公司债券 7.现金作为一种资产,它的( )院(系) 班级 学号姓名A.流动性差,营利性差B.流动性差,营利性强C.流动性强,营利性差D.流动性强,营利性强8.在下列各项指标中能够从动态角度反应企业偿债能力的是( )A.现金流动负债比率B.资产负债率C.流动比率D.速动比率9.制定利润分配时,应该考虑的投资者股东的因素( ) A.现金流量 B.筹资成本 C.资产的流动性 D.控制权的稀释 10.在下列股利分配政策中能使企业保持理想的资本结构,使综合成本最低并实现企业价值最大化的是( ) A.剩余股利政策 B.固定股利政策 C.固定比例政策 D.正常加额外股利政策二、名词解释(每小题4分,共20分)1、年金2、财务杠杆3、风险报酬率4、资本成本5、货币时间价值三、判断题:(每小题1.5分,共15分)1.财务管理昰组织财务管理活动,处理财务关系的一项经济管理工作。
( )2.企业价值最大化目标是单纯强调实现所有者或股东权益最大化。
( )3.对于多个方案而言,无论各方案的期望值是否相通,标准里离差率最大的方案一定是风险最大的方案。
( )4.两种正相关的证券组合不能抵消任何风险。
河南2006年对口升学机电与机制类基础课试卷及答案
2006 年河南省普通高等学校对口招收中等职业学校毕业生考试机电与机制类基础课试卷机械基础(130 分)一、填空题(每空 2 分,共32 分)1.金属材料在静载荷作用下产生永久变形而不破坏的能力称为。
2.V 带的张紧方法有调和加。
3.液压泵按结构不同可分为、、。
4.滚动轴承的代号由、和组成。
5.普通单向阀的作用是控制油液只能流动,不能流动。
6.表面热处理可使金属表面有高,心部又具有足够的。
7.光滑接触面对物体的约束反力作用于,方向沿接触面的,并指向。
二、选择题(每小题 3 分,共21 分。
每小题选项中只有一个答案是正确的,请将正确答案的序号填在题后的括号内)8.08F 牌号中,08F 表示其平均含碳量为()A.0.08% B.0.8%C.≤ 0.8% D.8%9.凸轮机构从动件的运动规律取决于凸轮的()A.大小B.形状C.厚度D.表面质量10.牛头刨床的横向走刀机构采用了间歇机构。
()A.齿轮B.槽轮C.棘轮D.曲柄滑块11.下列三种钢中,钢的弹性最好。
()A.T10 B.20 钢C.65Mn D.T10A12.螺纹联接采用弹簧垫圈的目的是为了()A.增大接触面积B.防松C.增大螺母高度D.方便拆卸13.轴端的倒角是为了()A.美观B.减少应力集中C.便于加工D.装配方便14.圆头平键为平键。
()A.A 型B.B 型C.C 型D.D 型三、判断题(每小题 2 分,共20 分。
正确的,在题后括号内打“√”,错误的打“×”)15.硅、锰是碳素钢中的有害元素。
()16.分力可能比合力大。
()17.合力作用与它的各分力同时作用的效果相同,故合力也是一个分力。
()18.构件受外力越大,则内应力也一定越大。
()19.35 钢采用正火处理可改善其切削加工性。
()20.标准普通螺纹的牙型角为60°。
()21.普通平键的宽度和厚度主要由轮毂厚度决定。
()22.机车主动轮联动机构采用了平行双曲柄机构。
2006级操作系统期末试卷B卷及答案
漳州师范学院_计算机科学与工程_系_计算机科学与技术_专业_06_级《计算机操作系统》课程期末考试卷(B)(2007—2008学年度第一学期)班级_________学号____________姓名__________考试时间:一、单项选择题(每小题1分,共 20分)1.( c )不是操作系统设计目标。
A. 方便性B.有效性C.及时响应D.可扩充性和开放性2.下列进程状态的转换中,不正确的是(d )A.就绪到运行B.运行到就绪C.阻塞到就绪D.就绪到阻塞3.信号量S的初值为5,在S上执行了9次P操作,6次V操作后,S的值为( d)。
A.10B.8C.6D. 24.在下列那种情况下,可使进程从阻塞状态转换到就绪(b )。
A.时间片用完了B.等待的某事件已经发生C.分配到必要的资源并获得了处理机D.等待某事件5.作业调度的关键是( c)。
A.用户作业充分准备B.有较好的操作环境C. 选择恰当的作业调度算法D. 选择恰当的作业管理程序6.下面不是预防死锁方法的是(a )。
A.把资源的互斥访问改成可共享访问B.使进程运行前申请所需的资源和在等待时不占有资源C.占有一些资源的进程再申请新的资源而不能满足时,释放以前占有的资源D.对系统中的资源必须按照某种顺序申请。
7.把进程从就绪状态队列调出运行,是属于(a )。
A.低级调度B.中级调度C.高级调度D.作业调度8.下面那种调度算法可能引起长作业长期不能调度( b)。
A. FCFSB.SJFC.高响应比优先D.时间片轮转9.在程序的装入方式中,下面那种装入方式是在程序运行过程中把逻辑地址转换成物理地址(c)。
A. 绝对装入方式B.可重定位装入C.动态运行时装入方式D.装入时动态链接10.在请求分页存储管理系统中,凡未装入过的页都应从( B )调入主存。
A. 系统区B.文件区C. 对换区D.页面缓冲区11.在请求分页存储管理方式中,下面关于缺页中断描述不正确的是( d)A.只有进程所访问的页不在内存时才会产生缺页中断。
2000年06月大学英语四级考试听力真题及答案
2000年6月大学英语四级(CET-4)听力真题试卷Section A1. A) She is not interested in the article. B) She has given the man much trouble.C) She would like to have a copy of the article.D) She doesn’t want to take the trouble to read the article.2. A) He saw the big tower he visited on TV. B) He has visited the TV tower twice.C) He has visited the TV tower once. D) He will visit the TV tower in June.3. A) The woman regrets having taken up much of the professor’s time.B) The woman regrets having taken up much of the professor’s time.C) The woman knows the professor has been busy.D) The woman knows the professor has run into trouble.4. A) He doesn’t enjoy business trips as much as he used to.B) He doesn’t think he is capable of doing the job.C) He thinks the pay is too low to support his family.D) He wants to spend more time with his family.5. A) The man thought the essay was easy. B) They both had a hard time writing the essay.C) The woman thought the essay was easy. D) Neither of them has finished the assignment yet.6. A) In the park. B) Between two buildings. C) In his apartment. D) Under a huge tree.7. A) It’s awfully dull.B) It’s really exciting.C) It’s very exhausting.D) It’s quite challenging.8. A) A movie. B) A lecture. C) A play. D) A speech.9. A) The weather is mild compared to the past years.B) They are having the coldest winter ever.C) The weather will soon get warmer.D) The weather may get even colder.10. A) A mystery story. B) The hiring of a shop assistant.C) The search for a reliable witness. D) An unsolved case of robbery.Section B11. A) They want to change the way English is taught.B) They learn English to find well-paid jobs.C) They want to have an up-to-date knowledge of English.D) They know clearly what they want to learn.12. A) Professionals. B) College students. C) Beginners. D) Intermediate learners.13. A) Courses for doctors. B) Courses for businessmen.C) Courses for reporters. D) Courses for lawyers.14. A) Three groups of learners. B) The importance of business English.C) English for Specific Purposes. D) Features of English for different purposes. Passage Two15. A) To show off their wealth. B) To feel good.C) To regain their memory. D) To be different from others.16. A) To help solve their psychological problems. B) To play games with them.C) To send them to the hospital. D) To make them aware of its harmfulness.17. A) They need care and affection. B) They are fond of round-the-world trips.C) They are mostly form broken families. D) They are likely to commit crimes.Passage Three18. A) Because it was too heavy. B) Because it did not bend easily.C) Because it did not shoot far. D) Because its string was short.19. A) It went out of use 300 years ago. B) It was invented after the short bow.C) It was discovered before fire and the wheel. D) It’s still in use today.20. A) They are accurate and easy to pull. B) Their shooting range is 40 yards.C) They are usually used indoors. D) They took 100 years to develop.参考答案1. C2. C3. B4. D5. B6. D7. A8. C9. D 10. D 11. D 12. A 13. B 14. C 15. B 16. A 17. A18. C 19. B 20. A2000年6月大学英语四级听力原文Section A1.M: Would you like a copy of professor Smith's article?W: Thanks, if it's not too much trouble.Q: What does the woman imply?2.W: Did you visit the Television Tower when you had your vacation in Shanghai last summer?M: I couldn't make it last June. But I finally visited it two months later. I plan to visit it again sometime next year.Q: What do we learn about the man?3.M: Prof. Kennedy has been very busy this semester. As far as I know, he works until midnight every day.W: I wouldn't have troubled him so much if I had know he was so busy.Q: What do we learn from the conversation?4.W: If I were you, I would have accepted the job.M: I turned down the offer because it would mean frequent business trips away from my family.Q: Why didn't the man accept the job?5.M: How are you getting on with your essay, Mary? I'm having a real hard time with mine.W: After two sleepless nights, I'm finally through with it.Q: What do we learn from this conversation?6.W: Where did you say you found this bag?M: It was lying under a big tree between the park and the apartment building.Q: Where did the man find the bag?7.M: Wouldn't you get bored with the same routine year teaching the same things to children?W: I don't think it would be as boring as working in an office. Teaching is most stimulating.Q: What does the woman imply about office work?8.M: I was terribly embarrassed when some of the audience got up and left in the middle of the performance.W: Well, some people just can't seem to appreciate real-life drama.Q: What are they talking about?9.W: Oh, it's so cold. We haven't had such a severe winter for so long, have we?M: Y es, the forecast says it's going to get worse before it warms up.Q: What do we learn from the conversation?10.M: Y ou were seen hanging about the store on the night when it was robbed, weren't you?W: Me? Y ou must have made a mistake. I was at home that night.Q: What are they talking about?Section B Passage One:There are three groups of English learners: beginners, intermediate learners, and learners of special English. Beginners need to learn the basics of English. Students who have reached an intermediate level benefit from learning general English skills. But what about student who want to learn specialist English for their work or professional life? Most students, who fit into this third group have a clear idea about what they want to learn. A bank clerk, for example, wants to use this specialist vocabulary and technical terms of finance. But for teachers, deciding how to teach specialist English is not always so easy. For a start, the variety is enormous. Every field from airline pilots to secretaries has its own vocabulary and technical terms.Teachers also need to have an up-to-date knowledge of that specialist language, and not many teachers are exposed to working environments outside the classroom. These issues have influenced the way specialist English is taught in schools. This type of course is usually known as English for Specific Purposes, or ESP and there isn't ESP courses for almost every area of professional and working life. In Britain, for example, there are courses which teach English for doctors, lawyers, reporters travel agents and people working in the hotel industry. By far, the most popular ESP courses are for business English.Questions 11 to 14 are based on the passage you have just heard.11. What is the characteristic of learners of special English?12. Who needs ESP courses most?13. What are the most popular ESP courses in Britain?14. What is the speaker mainly talking about?Passage Two:The first step to stop drug abuse is knowing why people start to use drugs. The reasons people abuse drugs are as different as people are from one to another. But there seems to be one common thread: people seem to take drugs to change the way they feel. They want to feel better or feel happy or to feel nothing. Sometimes, they want to forget or to remember. People often feel better about themselves when they are under the influence of drugs. But the effects don't last long. Drugs don't solve problems. They just postpone them. No matter how far drugs may take you, it's always around trip. After a while, people who miss drugs may feel worse about themselves, and then they may use more drugs. If someone you know is using or abusing drugs, you can help. The most important part you can play is to be there. Y ou can let your friends know that you care. Y ou can listen and try to solve the problem behind your friend's need to use drugs. Two people together can often solve a problem that seems too big for one person alone. Studies of heavy abusers in the United States show that they felt unloved and unwanted. They didn't have close friends to talk to. When you or your friends take the time to care for each other, you're all helping to stop drugs abuse. After all, what is a friend for?Questions 15 to 17 are based on the passage you have just heard.15. Why do some people abuse drugs?16. According to the passage, what is the best way to stop friends from abusing drugs?17. What are the findings of the studies about heavy drug users?Passage Three:Bows and arrows, are one of man's oldest weapons. They gave early man an effective weapon to kill his enemies. The ordinary bow or short bow was used by early all early people. This bow bad limited power and short range. However, man overcame these faults by learning to track his targets at a close range. The long bow was most likely discovered when someone found out that a five-foot piece of wood made a better bow than a three-foot piece. Hundreds of thousands of these bows were made and used for three hundred years. However, not one is known to survive today. We believe that a force of about one hundred pounds was needs to pull the string all the way back on a long bow. For a long time the bow was just a bent stick and string. In fact, more changes have taken place in a bow in the past 25 years than in the last 7 centuries. Today, bow is forceful. It is as exact as a gun. In addition, it requires little strength to draw the string. Modern bows also have precise aiming devices. In indoor contests, perfect scores from 40 yard are common. The invention of the bows itself ranks with discovery of fire and the wheel. It was a great-step-forward for man.Questions 18 to 20 are based on the passage you have just heard.18. Why did man have to track his target at a close range when using a short bow?19. What does the passage tell us about the long bow?20. What do we know about modern bows?。
高等数学II试卷及答案
06/07试卷(B )(本试卷共4页)1、函数⎪⎩⎪⎨⎧=≠+=0001sin 1sin ),(xy xy x y y x y x f ,则极限),(lim 00y x f y x →→=。
(A)不存在(B)等于1(C)等于零 (D)等于2 2、设函数221y x z +-=,则点(,)00是函数z 的(A )极大值点但非最大值点(B )极大值点且是最大值点(C )极小值点但非最小值点(D )极小值点且是最小值点3、设f (x ,y )为连续函数,则积分可交换积分次序为4、 级数()∑∞=⎪⎭⎫ ⎝⎛--1cos 11n n n α(常数0>α)(A )发散;(B )条件收敛;(C )绝对收敛;(D )敛散性与α有关。
5、幂级数n n n x n 2131-∞=∑⎪⎭⎫ ⎝⎛+的收敛半径是 (A)1;(B)3e ;(C)3-e ;(D)1-.6、微分方程x x y y 2cos =+''的一个特解应具有形式(A )x D Cx x B Ax 2sin )(2cos )(+++(B )x Bx Ax 2cos )(2+(C )x B x A 2sin 2cos +(D )x B Ax 2cos )(+一. 1、设函数xy y x y x y x f =+=),(,),(22ϕ,则[]),(),,(y x y x f f ϕ=??????。
2、曲线3231,2,t z t y t x ===在点)31,2,1(处的切线方程是。
3、曲线上任一点),(y x 处的切线斜率为该点横坐标的平方,则此曲线的方程是。
4、如果幂级数()∑∞=-01n n n x a 在1-=x 处收敛,在3=x 处发散,则它的收敛域是. 二. 解答下列各题(本大题共2小题,总计12分) 1、(5分)设)tan ln(x y z =,求y x z z ,。
2、(7分)求函数xy z e u z +-=在点(2,1,0)处沿曲面3=+-xy z e z 法线方向四、解答下列各题(本大题共2小题,总计14分) 1、(7分)计算二重积分224+-⎰⎰D xy dxdy 其中D :x2+y 2≤9.f (x ,y )为连续函数,写出积分在极坐标系中先积r 后积θ的二次积分。
六级英语真题2017年6月(第一套)试卷及答案详解
Questions 9 to 12 are based on the passage you have just heard.
9. A) Marketing strategies.
B) Holiday shopping.
C) Shopping malls.
D) Online stores.
10. A) About 50% of holiday shoppers.
B) About 20 - 30% of holiday shoppers.
C) About 136 million.
D) About 183. 8 million.
11. A) They have fewer customers.
B) They find it hard to survive.
C) They are thriving once more.
Questions 16 to 18 are based on the recording you have just heard. 16. A) It is accessible only to the talented.
B) It improves students'ability to think. C) It starts a lifelong learning process. D) It gives birth to many eminent scholars.
B) They are better at sports than at academic work.
C) They have difficulty finding money to complete their studies.
《遥感地学分析》06地信期末试卷-A_评分细则及答案
鲁东大学 2008 — 2009 学年第一学期2006 级 地 信 科专业 卷课程名称 遥感地学分析 课程号( 2680080) 考试形式( 开卷 ) 时间( 120分钟)评分细则与标准答案一、名词解释(30分)1、遥感地学分析遥感地学分析是建立在地学规律基础上的遥感信息处理和分析模型,是综合物理手段、数学方法和地学分析等综合性应用技术和理论,或者能反映地球区域分异规律和地学发展过程的有效信息理论方法。
2、遥感地理相关分析法所谓地理相关分析法,就是研究某个区域地理环境内各要素之间的相互关系、相互组合特征,而它应用于遥感地学分析,便是通过对这些因子特点及相互关系的研究,从各个不同的角度来分析、来推导出某个专题目标的特征,也就是在遥感图像上寻找与目标相关性密切的间接解译标志,从而推断、认识目标本身。
3、瞬时视场(IFOV)指遥感器内单个探测元件的受光角度或观测视野,单位为毫弧度(mrad)。
IFOV 越小,最小可分辨单元(可分像素)越小,空间分辨率越高。
一个瞬时视场内的信息,表示一个象元。
3、植被指数根据地物光谱反射率的差异作比值运算可以突出图像中植被的特征、提取植被类别或估算绿色生物量,通常把能够提取植被的算法称为植被指数。
4、假彩色合成根据加法彩色合成原理,选择遥感影像的某三个波段,分别赋予红、绿、蓝三原色,由于原色的选择不能代表物体在可见光的真实颜色,因此这种合成叫做假彩色合成。
5、环境本底法环境本底法,即了解一个地区的区域概况以及分析该地区地理环境的总体规律,在分析环境背景中,搞清楚区域内正常的组合关系、空间分布规律、正常背景值,也就是搞清楚环境本底,在这个基础上,寻找异常,并追根求源,找出异常原因,通过成因机制分析在更大范围内,寻找与异常有关的环境特征。
6、土地覆盖A 本是指自然营造物和人工建筑物所覆盖的地表诸要素的综合体,包括地表植被、土壤、冰川、湖泊、沼泽湿地及各种建筑物如道路等,具有特定的时间和空间属性,其形态和状态可在多种时空尺度上变化。
上海财经大学2006-2007学年第一学期《现代汉语》期末考试试卷及答案(A卷)
上海财经大学《现代汉语》2006-2007学年第一学期期末考试试卷(A卷)班级姓名学号成绩一、填空题(每空1分共20分)1.现代汉语一般词包括新词、、、外来词等。
2. 是词在现代最常用的意义。
3.同义词“雀跃--高兴"的主要区别是二者的色彩不同。
4.基本词具有、和能产性三个特色。
5.“不去”中“不”的声调要由去声变为。
6.普通话是以为标准音,以为语法规范。
7. 反义词分为和两种。
8.语汇规范的原则包括、、明确性三个方面。
9. 熟语的特点包括、和充当语言的备用单位。
10. 成语的来源有、当代创造、外来借用的特点。
11.歇后语“周瑜打黄盖“的意义是。
12.现代汉语合成词的构造方式有重叠、、复合三大类。
13.汉语普通话轻声与非轻声的区别在于不同,四声的差别是由决定的。
二、选择题(相题1分,共24分)1.普通话辅音中, ( ) 既可以充当声母,也可以做韵尾。
A. NB. zC. bD. ng2.对同文词“顽强--顽固”的主要区别解释正确的一项是( )A.语体色彩不同B.形象色彩不同C.范围大小不同D.感情色彩不同3.下面各组词中加线的语素相同的是( )A.雄壮--悲壮B.帘子--莲子C.美化--绿化D.打趣--打听4.“大米”和“一米”中的“米”: ( )A.都是语素B.都不是语素C.前者是语素,后者不是语素D.前者不是语素,后者是语素5.下列词中全是单纯词的是( )组。
A.徘徊好歹B.姐姐麦克凤C.玫瑰奥林匹克D.缩小玻璃6.元音Ü和i不同是由于( )A.嘴后圆展的不同B.舌位高低的不同C.舌位前后的不同D.舌位高低的不同、舌位前后的不同7.从语音的物理属性看,“翻”、“烦”、“反”、“泛”四个字发音不同,主要是由( )这个要素造成的。
A.音高B.音强C.音长D.音色8.语音同其他的声音一样,具有音高、音强、音长、音色四要素。
其中,在汉语语音中起重要作用的是( )。
A.音强和音长B.音高和音强C.音长和音色D.音色和音高9.下列熟语属于惯用语的是( )。
00078自考银行会计学06--12年--计算题、业务题、会计分录题--真题及答案
06--12年的业务题,包括计算题和会计分录题。
业务题的分比重很大,决定了考试成败,多做真题才能了解难度和考点。
下面是为了自己也为了大家总结的。
全国2006年4月高等教育自学考试银行会计学试题课程代码:00078六、业务题(根据以下经济业务编制会计分录。
本大题共16小题,其中,每笔简单分录2分,每笔复合分录3分,共35分)34.A公司提交“银行汇票申请书”,申请用其存款办理到B市的转账银行汇票1,500,000元。
经审查,银行同意受理。
35.A超市提交“转账支票”及一式两联“进账单”,金额为50,000元,委托本行收款,出票人是他行开户的B企业。
本行将转账支票提出交换后在规定时间内无退票通知时作出账务处理。
36.本行收到开户甲公司提交的第二、三联“银行汇票”及两联“进账单”要求兑付,实际结算金额为678,000元。
经审查,银行同意受理。
37.作为代理兑付行,本行收到在本行开户的乙公司提交的不定额“银行本票”和两联“进账单”,金额为950,000元。
经审查,银行同意受理。
38.本行从票据交换所提入“委托收款凭证”三、四、五联及“商业承兑汇票”,金额为l,784,450元,审查无误后,将第五联“委托收款凭证”交给承兑人A公司(付款人)。
当本行接到付款人“付款通知书”时,立即转账。
39.经查看,当日有一笔申请人为A公司的“银行承兑汇票”,金额为1,560,000元,现已到期,填制两借一贷“特种转账传票”办理转账。
40.本行从交换所提入支票,金额为50,000元,此支票为本行开户的乙公司签发。
经审查办理转账。
41.张兵向本行提交“银行本票申请书”一式三联,申办不定额现金“银行本票”100,000元。
经审查办理转账。
42.收到收报清算行传来数据,打印“资金汇划补充借方凭证”一式两联(汇票金额为1,500,000元,实际结算金额为l,490,000元,多余款金额为10,000元),经审查系A公司申办的银行汇票。
05-06中国科学技术大学生物化学考试试题及答案
中国科学技术大学2005--2006 学年第 1 学期考试试卷(2006年元月4日)考试科目: 生物化学(I)得分:__________学生所在系:___________ 姓名:__________ 学号:___________一、填空题(每题2分,共20分)1.生物膜的外周蛋白位于脂双分层的两侧,通过和与脂的极性头部或整合蛋白相连,整合蛋白通过和深深地镶嵌在双分子层内部。
2.DNA中的糖为,RNA中的为。
并且嘧啶存在于RNA,而嘧啶存在于DNA中。
3.为什么DNA纤维干燥后会缩短?。
4.在糖蛋白(glycoprotein)中,糖基最易于结合哪三个氨基酸?。
5. 脂质在血液中的运输,FA与血浆中的结合;磷脂、三酰甘油酯、胆固醇等以形式。
6. 在很多酶的活性中心均有His残基参与,其原因为:。
7. 判断一个纯化酶的方法优劣的主要依据是酶的和-。
8.酶在高浓度底物存在条件下,可起到一定程度的保护酶,使之不易发生热变性,其原因为:。
9.一酶促反应中,Kcat 为30.0 s-1, km 为0.0050 M, 当底物浓度为,其速率达最大反应速率的四分之一。
10. 丝氨酸蛋白酶的活性部位位于酶分子表面凹陷的小口袋中,可用于鉴定酶对底物残基的专一性,如糜蛋白酶断裂等疏水氨基酸残基的羧基端肽键。
二、选择题(每题2分,共20分)1. 下列哪一个序列不能被限制性内切核酸酶切断?()(a) GAA TTC (b)GTA TAC (C)GTAA TC (d)CAA TTG2. 反密码子UGA所识别的密码子是()(a) ACU(b)ACT(C)UCA(d)TCA(e)都不对3. 下列突变中,哪一种致死性最大?( )(a)胞嘧啶取代腺嘌呤(b)插入三个核苷酸(c)丢失三个核苷酸(e)插入一个核苷酸4.测定酶活性时,通常以底物浓度变化小于多少时测得的速度为反应的初速度?( )(a)0.1% (b) 0.5% (c) 1% (d) 2% (e) 5%5. 下列抑制剂,除哪个外都是不可逆抑制剂?()(a)磺胺类药物(b) 有机磷化合物(c)有机砷化合物(d) 氰化物(e)有机汞化合物6. 下列哪种酶属于EC3 ()(a)酯酶(b) 水化酶(c) 氧化还原酶(d) 水解酶7. 对于具有正协同效应的别构酶,v 达到Vmax 的10%时的[S]与v 达到Vmax 的90%时的[S]之比可能为()(a) 1:500 (b) 1:100 (c) 1:81 (d) 1:3 (e ) 1:18. 同工酶的特点是:()(a)催化作用相同,但分子组成不同和理化性质不同的一类酶;(b)催化相同反应,分子组成相同,但辅酶不同的一类酶;(c)催化同一底物起不同反应的酶的总称;(d)多酶体系中酶组分的总称。
2006年高考语文试卷及答案(浙江卷)
06高考浙江语文试题一、(18分,每小题3分)1.下列各句中,没有错别字且注音全对的一项是A.母亲生前没给我留下过什么隽(jùn)永的哲言,或要我恪(kè)守的教诲,只是在她去逝之后,她坚忍的意志和毫不张扬的爱,在我的印象中愈加鲜明深刻。
B.在亵(xiè)渎一切、消费一切的氛(fēn)围中,精典正在被调侃、嘲讽、戏说所清解,人们心中只残留下少得可怜的一点美好回忆。
C.这番话不免罗嗦,但是我们原在咬文嚼(jué)字,非这样锱铢必较不可。
……咬文嚼字,表面上像只是斟酌(zhuó)文字的分量,实际上就是调整思想和情感。
D.在雨中,尽情敞开自己的心扉,让雨淋湿是多么惬(qiè)意啊!然而许多人在美丽的雨天却成了匆匆过客,忘了咂(zā)摸品味一下自然赋予的香茗。
2.依次填入下列横线处的词语,最恰当的一组是①我掉首东顾,只见云雾弥漫,山峦隐现,绚烂的彩霞竟然已经渺无!②故乡的小溪永远在我的心中静静流淌,轻轻私语,我精神的抚慰。
③中韩围棋再度交锋,韩国队实力不可小觑,中国队的水平高超,行家估计中国队胜率较大。
A.踪迹给予越发 B.踪迹给以更加C.踪影给予更加 D.踪影给以越发3.下列各句中,加点的词语运用正确的一句是A.马大嫂为人热情,工作兢兢业业,总是不胜其烦地为小区居民做好每一件事。
B.我终于登上了魂牵梦萦的黄山,奇松异石、流云飞瀑宛然在目,令人赞叹不已。
C.正是这些变通的劳动者,凭借着理想与信念,胼手胝足,夙兴夜寐,创造了一个个奇迹。
D.他鲁莽草率,刚愎自用,走到哪里哪里就被他闹得一团糟,真可谓“人中吕布,马中赤兔”。
4.下列各句中,没有语病且句意明确的一句是A.科学工作者需要开阔的心胸,就是和自己学术观点不一样的同行也应坦诚相待,精诚合作。
B.健康休闲是一种以恢复身心健康状态、丰富生活、完善自我为目的的闲暇活动。
C.曾记否,我与你认识的时候,还是个十来岁的少年,纯真无瑕,充满幻想。
苏大_基础物理_(上)题库_试卷及答案
苏州大学 普通物理(一)上 课程试卷(01)卷 共6页 二、计算题:(每小题10分,共60分)1、半径为R ,质量为M 的均匀圆盘能绕其水平轴转动,一细绳绕在圆盘的边缘,绳上挂质量为m 的重物,使圆盘得以转动。
(1)求圆盘的角加速度;(2)当物体从静止出发下降距离h 时,物体和圆盘的动能各为多少?2、某质点作简谐振动,周期为2s ,振幅为0.06m ,计时开始时(t=0),质点恰好在负向最大位移处,求:(1)该质点的振动方程;(2)若此振动以速度v=2m/s 沿x 轴正方向传播,求波动方程; (3)该波的波长。
3、图示电路,开始时C 1和C 2均未带电,开关S 倒向1对C 1充电后,再把开关S 拉向2,如果C 1=5µF ,C 2=1µF ,求: (1)两电容器的电压为多少?(2)开关S 从1倒向2,电容器储存的电场能损失多少? 4、求均匀带电圆环轴线上离圆心距离a 处的电势,设圆环半径为R ,带有电量Q 。
5、两根长直导线互相平行地放置在真空中,如图所示,导线中通有同向电流I 1=I 2=10安培,求P 点的磁感应强度。
已知50.021==I P I P 米,1I P 垂直2I P 。
6、直径为0.254cm 的长直铜导线载有电流10A ,铜的电阻率ρ=1.7×10-8Ω·m ,求: (1)导线表面处的磁场能量密度ωm ; (2)导线表面处的电场能量密度ωe 。
苏州大学 普通物理(一)上 课程试卷(02)卷 共6页二、计算题:(每小题10分,共60分)1、一轻绳绕于半径r=0.2m 的飞轮边缘,现以恒力F=98N 拉绳的一端,使飞轮由静止开始转动,已知飞轮的转动惯量I=0.5Kg •m 2,飞轮与轴承之间的摩擦不计。
求:h22rF=98N(1)飞轮的角加速度;(2)绳子下拉5m 时,飞轮的角速度和飞轮获得的动能?2、一个水平面上的弹簧振子(劲度系数为k ,重物质量为M ),当它作振幅为A 的无阻尼自由振动时,有一块质量为m 的粘土,从高度为h 处自由下落,在M 通过平衡位置时,粘土正好落在物体M 上,求系统振动周期和振幅。
大学英语(A)模拟试卷及答案2011Test06
全国高校网络教育公共基础课统一考试大学英语(A)模拟试卷(2010年修订版)Test 6(根据全国高校网络教育考试委员会2011年1月新颁考试大纲和题型进行了相应调整)Information for the Examinees:This examination consists of FOUR parts. They are:Part Ⅰ: Reading Comprehension (30 points, 25 minutes)Part Ⅱ: Vocabulary and Grammar (30 points, 25 minutes)Part Ⅲ: Translation (20 points, 10 minutes)Part IV: Writing (20 points, 30 minutes)The total marks for this examination is 100 points. Time allowed for completing this examination is 90 minutes).Section I: Reading Comprehension [30 points]Part 1: Questions 1-5 are based on this part. (15 points)Read the following passage and choose the best answer from A, B, C and D.Since World War II, there has been a clearly discernible trend, especially among the growing group of college students, toward early marriage. Many youths begin dating in the first stages of adolescence, “go steady” through high school, and marry before their formal education has been completed. However, emotional maturity is no respecter of birthday; it does not arrive automatically at twenty-one or twenty-five. Some achieve it surprisingly early, while others never do, even in three score years and ten.Many students are marrying as an escape, not only from an unsatisfying home life, but also from their own personal problems of isolation and loneliness. And it can almost be put down as s dictum that any marriage seldom solves one’s problems, more often, it merely makes them worse. Furthermore, it is doubtful whether the home is an institution that is capable of carrying all that the young are seeking to put into it. Young people correctly understand that their parents are wrong in believing that “success” is the ultimate good, but they erroneously believe that they themselves have found the true center of life’s meaning. Their expectations of marriage are essentially utopian and therefore incapable of fulfillment. They want too much, and disappointments are often bound to follow.Shall we, then, join the chorus of “Miseries” over early marriage? One cannot generalize: allearly marriage are not bad any more than all later ones are good. Satisfactory marriages are determined not by time, but by the emotional maturity of the partners. Therefore, each case must be judged on its own merits. If the early marriage is not an escape, if it is entered into with relatively few illusions or false expectations, and if it is economically feasible, why not? Good marriages can be made from sixteen to sixty, and so are bad ones. (301 words)1. According to this article the trend toward early marriage ______.A. was the result of the Great Depression of the 1930’sB. could not be easily determinedC. is one that could be clearly seenD. is a result of the emotional maturity of the young2. The author suggests that many of today’s early marriage are a result of ______.A. escapismB. theological dictumC. lack of formal educationD. convenience3. More often than not, early marriage will ______.A. not affect one’s problemsB. solve a person’s problemsC. intensify one’s problemsD. ease one’s problems4. The author states that the home as an institution is ______.A. overratedB. unworthy of worshipC. a god who can grant everything that you wish forD. probably not capable of being what many young people expect it to be5. Many young people who marry early believe that ______.A. their parents have found the true meaning of lifeB. they have found the true center of life’s meaningC. “success” is the ultimate goodD. to succeed is not at all importantPart 2: Questions 6-10 are based on this part. (15 points)Read the following passage and choose the best answer from A, B, C and D.It was 1985, and Rafe Esquith was beginning his third year of teaching in Los Angeles public schools. He faced a class of 40 sixth-graders from low-income homes where English rarely was spoken, and the best reader among them was two years below grade level.But to everyone’s surprise, he decided to teach them Shakespeare.Five families agreed to let their children play “Macbeth”for two hours after school. This proved to be so much fun that, within weeks, Esquith had 28 kids happily soaking up the drama of blood and betrayal in medieval Scotland. They were learning many words they had never heard before.But when Esquith asked a school district supervisor for official approval, he received this note: “Mr. Esquith, it is not appropriate that you stay after school to teach Shakespeare. It would be better if you did something with the children that is academic.”It would not be the last time that the narrow thinking of big-city school administration got in Esquith’s way. Yet the bearded, 6-foot-tall cyclone has proved that a teacher who thinks very big-much harder lessons, larger projects, extra class time can help disadvantaged children in ways most educators never imagine.This was difficult at first, until he stumbled upon a concept of teaching that is at the core ofhis success. American children, even those from hardworking immigrant cultures, have in Esquith’s view been wrongly taught that learning should always be fun, but teachers who think hard lessons are bad for kids from low-income homes. When faced with something difficult, such students don’t know what to do.The Declaration of Independence says Americans are entitled to the pursuit of happiness, but the emphasis in public schooling has been on the happiness, he believes. “What happened to pursuit?” Esquith said. So he has created an entirely new universe in his classroom, cherishing effort and the slogan, “There Are No Shortcuts”.As for their own dramatic performances, Esquith got around the original ban on his after- school “Macbeth”rehearsals by switching to Thornton Wilder’s “Our Town”. When that class finally performed the Shakespeare play, a school district supervisor showed up. The high-ranking district administrator came up afterwards and shook his hand. “Rafe”, she said, “I’ve never seen Shakespeare done better.”(376 words)6. It can be learned from the passage that Esquith’s students ______.A. liked the traditional teaching betterB. were relatively poor in intelligenceC. were mainly from immigrant familiesD. refused to cooperate with the new teacher7. At first, Esquith’s Shakespeare-teaching ______.A. won the support of the school authorityB. got slow response from the school authorityC. did not draw attention from the school authorityD. was not allowed by the school authority8. It is implied that most educator ______.A. fail to realize the potential of disadvantaged studentsB. fail to introduce fun into the learning of disadvantaged studentsC. are reluctant to admit the unfair treatment to disadvantaged studentsD. are unaware of the difficulty faced by disadvantaged students9. Esquith’s principle of teaching is different from the general one in that ______.A. he insists on giving harder lessons to more advanced studentsB. he places greater emphasis on hard work in students’ learningC. he pays less attention to students’ academic performancesD. he dismisses the concept of extra homework for students10. What is the main idea of the passage?A. An inspiring teacher wins the love and respect of his students.B. An experienced teacher contributes to the school and the students.C. An innovative teacher makes changes in the students.D. An optimistic teacher helps build confidence in the students.Section II: Vocabulary and Grammar [30 points]Part 1: Questions 11- 20 are based on this section. (10 points)Read the following sentences and choose the best answer from A, B, C and D.11. Scarcely had the car stopped ______ the cell phone began to ring.A. thanB. whenC. afterD. before12. The worst thing ______ television is that many people have become its slaves.A. aboutB. inC. withD. from13. When the girl heard the news, she could do nothing but ______ back home.A. goingB. wentC. to goD. go14. Her determination to ______ her goal of life motivated her to greater effort.A. retainB. attainC. maintainD. entertain15. This couple has two daughters, ______ of whom is working in the U.S.A. the youngerB. the youngestC. a youngerD. the young16. They ______ thankful to have the opportunity to further their studies.A. would like to beB. ought to beC. would rather beD. had better be17. Large fish usually ______ small fish.A. gatherB. take onC. feed onD. organize18. All I got was a busy ______ when I dialed his number.A. signB. noiseC. signalD. voice19. You should take care that you have not ______ any detail in the design.A. disappearedB. thrownC. deliveredD. neglected20. I won’t complain as long as I ______ where I want to go.A. will getB. getC. gotD. would getPart 2: Questions 21 - 30 are based on this section. (20 points)Read the following passage and fill in each blank by choosing the best answer from A, B, C and D.It is believed that the responsibilities for learning lie with the students. The (21) ______ student is considered to be one who is motivated to learn for the sake of (22) ______, not the one interested only in getting high grades. Sometimes homework is returned (23) ______ brief written comments but without a grade. Even if a grade is not given, the student is (24) ______ for learning the material assigned. When research is assigned, the professor expects the students to take it actively and complete it with minimum guidance. It is the (25) ______ responsibility to find books, magazines, and articles in the library. Professors do not have the time to explain how a university library works. Professors will help students who need it but (26) ______ that their students should not be too dependent on them. In the United States professors have many other duties (27) ______ teaching, such as administrative or research work. (28) ______, the time that a professor can spend with a student outside of class is (29) ______. If a student has problems with classroom work, the student should either (30) ______ a professor during office hours or make an appointment.21. A. poor B. ideal C. average D. disappointed22. A. fun B. work C. learning D. prize23. A. by B. in C. for D. with24. A. criticized B. innocent C. responsible D. dismissed25. A. student’s B. professor’s C. assistant’s D. librarian’s26. A. hate B. dislike C. like D. prefer27. A. but B. except C. with D. besides28. A. However B. Therefore C. Furthermore D. Nevertheless29. A. plentiful B. limited C. irregular D. flexible30. A. get B. annoy C. approach D. attachSection III: Translation [20 points]Translate the following four sentences into English.31.正是由于他在面试中表现不错,他才获得了这份工作。
无锡大桥历年入学试卷及答案
06年大桥数学试题一、计算1、123×5.67+8.76×567=1.23×567+8.76×567=(1.23+8.76)×567=(10—0.01)×567=567×10—567×0.01=5670—5.67=5664.332、33×44+44×55+55×66-66×77 =11×11×(3×4+4×5+5×6—6×7)=121×20=24203、36194642323+×0.125+112×64423-64423×524=193623+(11581224+-)×64423=1936234、(7518-61115)÷{21415+(4-2115)÷1.45}=4990÷[14215+11415÷9120]=4990÷6415=49 384二、填空1、选出正确的一项是()A、ABC是任意自然数,则(A+B)÷2 (B+C)÷2 (A+C)÷2中至少有一个是自然数。
B、时钟上,同一时间内分针转动的角度的速度是时针的60倍。
C、互质的两个数中,至少有一个是质数。
D、如果37×73=1,则37和73都是倒数。
E、用四舍五入法保留近似数,约等于0.8的两位小数中最大的是0.79。
答案为A。
A,B,C三个数中必有两个是同奇偶的。
他们的和一定是偶数2、一个长方体,如图,从这个长方体上切一个长宽高为连续自然数的最大长方体,第二次从剩下部分再切一个长宽高为连续自然数的最大长方体,第三次按第二次的方法去切,最后得到的长方体的体积是()。
答案为:363、有甲乙丙三堆苹果共384个,第一次从甲堆中拿出乙堆的个数给乙,第二次从乙堆中拿出丙堆的个数放入丙堆,第三次从丙堆中拿出甲堆的个数放入甲堆,最后甲乙丙三堆苹果数相等,则甲乙丙原来分别有( )个苹果。
最新电大《广告心理学》形考作业任务01-06网考试题及答案
最新电大《广告心理学》形考作业任务01-06网考试题及答案100%通过考试说明:《广告心理学》形考共有6个任务,任务1至任务5是客观题(0001形考任务_0001、0002形考任务_0001、0003形考任务_0001、0004形考任务_0001、0005形考任务_0001)。
在考试中,可以多次抽取任务1至任务5试卷,直到出现这几套试卷中的任意一套,就可以按照该套试卷答案答题。
做考题时,利用本文档中的查找工具,把考题中的关键字输到查找工具的查找内容框内,就可迅速查找到该题答案。
本文库还有其他教学考一体化答案,敬请查看。
01任务(抽取0001形考任务_0001)一、多项选择题(共 15 道试题,共 30 分。
)1. 结构式访谈与无结构式访谈的不同点在于()。
A. 结构式访谈拟有提纲和题目,而无结构式访谈没有提纲和题目B. 结构式访谈是有一定目的的,而无结构式访谈没有固定的目的C. 结构式访谈是由访谈者询问,受访者回答,而无结构式访谈主要以漫谈方式进行D. 结构式访谈不需要有访谈策略,而无结构式访谈需要有好的访谈策略2. 对离中趋势进行度量的统计量称为差异量数,以下哪些属于差异量数指标?()A. 中数B. 全距C. 平均差D. 标准差3. 认识、情感、意志都是心理过程。
()则是这些心理过程所共有的心理特征,它伴随于这些过程之中。
A. 感觉B. 知觉C. 联想D. 注意4. 小孩的体重随着年龄的长大而不断增加,从相关的三种方式上来评判,“体重”与“年龄”属于()A. 正相关B. 负相关C. 部分相关D. 零相关5. 结构式访谈的优点在于()A. 谈话易控制B. 气氛轻松C. 受访者处于被动D. 简练,省时6. 在以下各项中,属于实验法中的自变量的是()。
A. 广告片B. 策划案C. 喜爱度D. 注意值7. 如果一则实验表明,某广告随着其字体的逐渐变大,而导致消费者对其注意度的逐步提高。
那么从相关的方式上来评判,“广告字体”与“消费者的注意度”属于()相关。
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职业技能鉴定国家题库维修电工中级理论知识试卷注意事项1、考试时间:120分钟。
2、本试卷依据2001年颁布的《维修电工国家职业标准》命制。
3、请首先按要求在试卷的标封处填写您的姓名、准考证号和所在单位的名称。
4、请仔细阅读各种题目的回答要求,在规定的位置填写您的答案。
5、不要在试卷上乱写乱画,不要在标封区填写无关的内容。
一、单项选择(第l题~第160题。
选择一个正确的答案,将相应的字母填入题内的括号中。
每题0.5分,满分80分。
)1.在企业的经营活动中,下列选项中的( B )不是职业道德功能的表现。
A、激励作用B、决策能力C、规范行为D、遵纪守法2.在商业活动中,不符合待人热情要求的是( A )。
A、严肃待客,表情冷漠B、主动服务,细致周到C、微笑大方,不厌其烦D、亲切友好,宾至如归3.下列事项中属于办事公道的是( D )。
A、顾全大局,一切听从上级B、大公无私,拒绝亲戚求助c、知人善任,努力培养知已婚 D、坚持原则,不计个人得失4.下列关于勤劳节俭的论述中,不正确的选项是( B )。
A、勤劳节俭能够促进经济和社会发展B、勤劳是现代市场经济需要的,而节俭则不宜提倡C、勤劳和节俭符合可持续发展的要求D、勤劳节俭有利于企业增产增效5.企业创新要求员工努力做到( C )。
A、不能墨守成规,但也不能标新立异B、大胆地破除现有的结论,自创理论体系C、大胆地试大胆地闯,敢于提出新问题D、激发人的灵感,遏制冲动和情感6.电阻器反映导体对电流起阻碍作用的火小,简称电阻,用字母( A )表示。
A、RB、ρC、ΩD、R√7.( c )反映了在不含电源的一段电路中,电流与这段电路两端的电压及电阻的关系。
A、欧姆定律B、楞次定律C、部分电路欧姆定律D、全欧姆定律8.电功率的常用的单位有( )。
A、瓦B、千瓦C、毫瓦D、瓦、千瓦、毫瓦9.如图所示,不计电压表和电流表的内阻对电路的影响。
开关接1时,电流表中流过的短路电流为( )。
A、0AB、10AC、0.2AD、约等于0.2A10.用右手握住通电导体,让拇指指向电流方向,则弯曲四指的指向就是( )。
A、磁感应B、磁力线 c、磁通 D、磁场方向11.当线圈中的磁通减小时,感应电流产生的磁通与原磁通方向( D )。
A、正比B、反比C、相反D、相同12.电感两端的电压超前电流( A )。
A、90°B、180°C、360°D、30°13.变压器具有改变( A )的作用。
A、交变电压B、交变电流C、变换阻抗D、以上都是14.启动按钮优先选用( D )色按钮;急停按钮应选用( )色按钮,停止按钮优先选用( )色按钮。
A、绿、黑、B、白、红、红C、绿、红、黑D、白、红、黑1 5.三极管放大区的放大条件为( C )。
A、发射结正偏,集电结反偏B、发射结反偏或零偏,集电结反偏C、发射结和集电结正偏D、发射结和集电结反偏16.在图中所示放大电路,己知UCC =6V、RC=2KΩ、RB=200Kω、β=50。
若RB减小,三极管工作在( C )状态。
A、放大B、截止C、饱和D、导通17.常用的稳压电路有( )等。
A、稳压管并联型稳压电路B、串联型稳压电路C、开关型稳压电路D、以上都是18.定子绕组串电阻的降压启动是指电动机启动时,把电阻串接在电动机定子绕组与电源之间,通过电阻的分压作用来( D )定子绕组上的启动电压。
A、提高B、减少C、加强D、降低19.若被测电流超过测量机构的允许值,就需要在表头上( D )一个称为分流器的低值电阻。
A、正接B、反接C、串联D、并联20.各种绝缘材料的( C )的各种指标是抗张,抗压,抗弯,抗剪,抗撕,抗冲击等各种强度指标。
A、接绝缘电阻B、击穿强度C、机械强度D、耐热性21.锉刀很脆,( D )当撬棒或锤子使用。
A、可以B、许可C、能D、不能22.( D )的工频电流通过人体时,人体尚可摆脱,称为摆脱电流。
A、0.1mAB、lmAC、5mAD、10mA23.如果人体直接接触带电设备及线路的一相时,电流通过人体而发生的触电现象称为( A )。
A、单相触电B、两相触电C、接触电压触电D、跨步电压触电24.下列控制声音传播的措施中( )不属丁隔卢措施。
A、在室内使用双层门B、在室内使用多层门C、采用双层窗D、将多孔海绵板同定在室内25.岗位的质量要求,通常包括操作程序,工作内容,工艺规程及( C )等。
A、工作计划B、工作目的C、参数控制D、工作重点26.电工指示按仪表测量机构的结构和工作原理分,有( C )等。
A、直流仪表和电压表B、电流表和交流仪表C、磁电系仪表和电动系仪表D、安装式仪表和可携带式仪表27.下列电工指示仪表中若按仪表的测量对象分,主要有( B )等。
A、实验室用仪表和工程测量用仪表B、功率表和相位表C、磁电系仪表和电磁系仪表D、安装式仪表和可携带式仪表28.电工指示仪表的准确等级通常分为七级,它们分别为1.0级、1.5级、2.5级、( D )等。
A、3.0级B、3.5级C、4.0级D、5.0级29.电工指示仪表在使用时,通常根据仪表的准确度等级来决定用途,如( D )级仪表常用于工程测量。
A、0.1级B、0.5级C、1.5级D、2.5级30.与仪表连接的电压互感器的准确度等级应不低于( B )。
A、0.1级B、0.5级C、1.5级D、2.5级31.对于有互供设备的变配电所,应装设符合互供条件要求的电测仪表。
例如,对可能出现两个方向电流的直流电路,应装设有双向标度尺的( B )。
A、功率表B、直流电流表C、直流电压表D、功率因数表32.电子仪器按( )可分为手动、遥控、程序、自动等仪器。
A、功能B、工作频段C、工作原理D、操作方式33.X6132型万能铣床启动主轴时,先接通电源,再把换向开关SA3转到主轴所需的旋转方向,然后按启动按钮( D )接通接触器KMI,即可启动主轴电动机M1。
A、SBl或SB3B、SB2或SB3C、SB3D、SB3或SB434.X6132型万能铣床进给运动时,升降台的上下运动和工作台的前后运动完全由操纵手柄通过行程开关来控制,其中,用于控制工作台向前和向下的行程开关是( C )。
A、SQ1B、SQ2C、SQ3D、SQ435.X6132型万能铣床工作台的左右运动由操纵手柄来控制,其联动机构控制行程开关SQl 和SQ2,它们分别控制工作台( D )运动。
A、向右及向上B、向右及向下C、向右及向后D、向右及向左36.X6132型万能铣床工作台向后、( A )压手柄SQ4及工作台向左手柄压,接通接触器KM4线圈,即按选择方向作进给运动。
A、向上B、向下C、向后D、向前37.X6132型万能铣床工作台向前( B )手柄压SQ3及工作台向右手柄压SQ1,接通接触器KM3线圈,即按选择方向作进给运动。
A、向上B、向下C、向后D、向前38.X6132型万能铣床工作台变换进给速度时,当蘑菇形手柄向前拉至极端位置且在反向推回之前借孔盘推动行程开关( D ),瞬时接通接触器KM3,则进给电动机作瞬时转动,使齿轮容易啮合。
A,SQ1 B,SQ3 C、SQ4 D、SQ639.X6132型万能铣床主轴启动后,若将快速按钮SB5或( D )按下,接通接触器KM2线圈电源,接通YC3速离合器,并切断YC2进给离合器,工作台按原运动方向作快速移动。
A、SB3B、SB4C、SB2D、SB640.X6132型万能铣床主轴上刀换刀时,先将转换开关SA2扳剑断开位置确保主轴( D ),然后再上刀换刀。
A、保持待命状态B、断开电源C、与电路可靠连接D、不能旋转41.X6132型万能铣床控制电路中,机床照明由照明变压器供给,照明灯本身( C )控制。
A、主电路B、控制电路C、开关D、无专门42.在MGBl420万能磨床的冷却泵电动机控制电路中,接通电源开关QSl后,220V交流控制电压通过开关SA2控制接触器( ),从而控制液压、冷却泵电动机。
A、KM1B、KM2C、KM3D、KM443.在MGBl420万能磨床的内外磨砂轮电动机控制同路中,接通电源开关QSl,220V交流控制电压通过开关SA3控制接触器( )的通断,达到内外磨砂轮电动机的启动和停止。
A、KM1B、KM2C、KM3D、KM444.在MGBl420万能磨床的工件电动机控制同路中,M的启动、点动及停止由主令开关( )控制中间继电器KA1、KA2来实现。
A、SA1B、SA2C、SA3D、SA445.在MGBl420万能磨床的自动循环工作电路系统中,通过微动开关SQl、SQ2,行程开关SQ3,万能转换开关( ),时间继电器KT和电磁阀YT与油路、机械方面配合实现磨削自动循环工作。
A、SA1B、SA2C、SA3D、SA446.在MGBl420万能磨床的品闸管直流调速系统中,该系统的工件电动机的转速为( C )。
A、0~1100r/minB、O~1900r/minC、0~2300r/minD、O~2500r/min 47.在MGBl420万能磨床晶闸管直流调速系统的主回路中,用整流变压器直接对220V交流电整流,最高输出电压( )左右。
A、11OVB、190VC、220VD、380V48.在MGBl420万能磨床晶闸管直流调速系统控制同路的辅助环节中,当负载电流大于额定电流1.4倍时,( )饱和导通,输出截止。
A、V38B、V39C、V29D、RP249.在MGBl420万能磨床品闸管直流调速系统控制同路的辅助环节中,由C15、( )、R27、RP5等组成电压微分负反馈环节,以改善电动机运转时的动态特性。
A、R19B、R26C、RP2D、R3750.在MGBl420万能磨床晶闸管直流调速系统控制同路的辅助环节中,由R29、R36、R38组成( )。
A、积分校正环节B、电压负反馈电路C、电压微分负反馈环节D、电流负反馈电路51.在MGBl420万能磨床品闸管直流调速系统控制回路中,V36的基极加有通过R19、V13来的正向直流电压和由变压器TCl的二次线圈经V6、( A )整流后的反向直流电压。
A、V12B、V21C、V24D、V2952.在MGBl420万能磨床晶闸管直流调速系统控制同路电源部分,经V1~V4整流后再经( A )取得+20V直流电压,供给单结品体管触发电路使用。
A、V5B、V6C、V7D、V853.绘制电气原理图时,通常把主线路和辅助线路分开,主线路用粗实线画在辅助线路的左侧或( A )。
A、上部B、下部C、右侧D、任意位置54.下列故障原因中( B )会导致直流电动机不能启动。
A、电源电压过高B、电刷接触不良C、电刷架位置不对D、励磁同路电阻过人55.直流电动机冈由丁换向器偏摆导致电刷下火花过人时,应用( )测量,偏摆过大时应重新精车。