第一套选择填空
统计学基础(六套卷)

第一套一、填空1. 统计数据的直接来源主要有两个渠道:一是;二是。
2.统计的含义包括三个方面,它们是。
3.按照计量层次分类,统计数据可以分为:。
4.按照时间状况分类,统计数据可以分为:。
5.按照收集方法分类,统计数据可以分为:。
6.8、9、12、7、11、13、9、11、8、10以上10个数据的平均数是,中位数是,方差是。
7.在大样本的检验方法中,当总体方差2σ未知时,可以用样本方差2s 来近似代替总体方差,此时总体均值检验的统计量为:。
8.判定系数2R =(请用SSR SSE SST 、、表示)。
9.一般将时间序列的构成要素分成四种,即。
10.已知11p q 为报告期的销售额,10/p p 是对个体的价格指数,则价格指数的加权平均调和形式的计算公式为:。
二、单项选择1.下列数据属于品质数据的是()A.顺序数据B.截面数据C.观测数据D.实验数据 2.对一批小麦种子进行发芽率试验,这时总体是() A 该批小麦种子 B 该批小麦的发芽率 C 该批小麦中发芽的种子 D 该批小麦的发芽率3.已知均值为μ,方差为2σ的总体中,抽取容量为n 的随机样本,当n 充分大时,样本的均值和方差近似等于() A.2n nμσ B.2nμσ C. 2μσ D. 2nσμ4.下列散点图中表示非线性相关的图为( )A BC D5.在右侧检验中,利用P 值进行检验时,拒绝原假设的条件是( ) A. P α>值 B. P β>值 C. P α<值 D. P β<值三、判断题1.分层抽样除了可以对总体进行估计外,还可以对各层的子总体进行估计。
2.平均指标反映了现象总体的规模和一般水平,但掩盖了总体各单位的差异情况,因此通过平均指标不能全面认识总体的特征。
()3.总体分布为非正态分布而样本均值可能为正态分布。
( )4.抽样误差由于事先可以进行控制或计算的,所以这类误差通常是可以消除的。
( )5.在单独求一组数据计算标准差时,公式下方虚线处应为1n -四、简答题1. 河南大学数学院为了增加学生们的学习积极性,推行了一套新的制度,通过一学期的试行,由最终的成绩决定是否继续执行。
《统计学》练习题及答案

《统计学》练习题及答案PART:1导论《第一套》一、填空1、统计的研究对象是社会经济现象(总体)的(数量方面)。
2、统计工作程序是统计资料的搜集、(整理)、(分析)。
3、统计学的研究方法有(大量观察法)、(实验设计法)(统计分组法)、(综合指标法)和(统计模型法)及统计推断法。
1、社会经济统计学是一门(C)A、自然科学B、新兴科学C、方法论科学D、实质性科学2、社会经济统计的研究范围是(D)A、社会现象的数量方面B、人人类生活现象的数量方面C、自然科学研究的数量方面D、社会经济现象的数量方面3、社会经济统计现象形成统计总体的必要条件是(B):A、差异性B、同质性C、社会性D、综合性4、社会经济统计对社会经济现象总体数量的认识是(A):A、从个体到总体B、从总体到个体C、从定性到定量D、从定量到定性5、一个统计总体(D)A、只能有一个指志B、只能有一个标志C、可以有多个标志D、可以有多个指标6、变量包括标志和(D)A、品质标志B、数量标志C、数量指标D、指标7、在研究城市商业企业状况中,商业企业的营业员人数是(A)A、数量标志B、数量指标C、变量值D、标志变量8、以产品等级来衡量产品质量优劣,则该产品等级是(B):A、数量标志B、品质标志C、数量指标D、质量指标9、就统计指标而言,变异是指(D):A、数量指标的具体表现各不相同B、质量指标的具体表现各不相同C、统计指标的具体表现各不相同D、以上都是正确的10、商业企业的职工人数、商品销售总额是():A、连续变量B、离散变量C、前者是连续变量、后者也是连续变量。
D、前者是离散变量、后者是连续变量。
三、多选题1、统计是对社会经济现象的一种(BC):A、意识活动B、实践活动C、认识活动D、改造活动2、总体和总体单位的概念不是固定不变的,是指(ABD):A、总体随统计研究目的的改变现而改变。
B、在一定条件下,总体可以改变为总体单位。
C、只能是总体变为总体单位D、在一定条件下,总体单位可以改变为总体。
电算化全真试题选择填空

全真试题一一、选择题1、不属于档案保管员的责任是。
A、负责本系统各类数据软盘与系统软盘的保管工作B、负责各类帐证表资料的保管C、上机备份数据、进展数据恢复D、保管资料、未经批准不得外借2、会计电算化下的内部控制按其实现的方式不同,分为。
A、管理控制与会计控制B、组织控制与功能控制C、一般控制D、应用控制3、关于数据备份作用的表达,错误的选项是。
A、将硬盘数据建立副本以便长期保存B、可以防止意外事故造成硬盘数据丧失、非法篡改与破坏C、可以利用备份数据,使损失最小D、利用备份数据进展反结帐4、凭证正文部份必须具有摘要、方向、金额与。
A、数量与单价B、会计科目C、单位代码D、结算方式与票号5、我国会计电算化开展过程大体可分为阶段。
A、2个B、3个C、5个D、4个6、会计电算化是现代会计开展史上的又一次重大革命,已经成为一门融。
A、会计核算与会计管理为一体的学科B、会计学科及计算机科学为一体的学科C、会计学科及管理为一体的学科D、计算机科学、管理科学、信息科学与会计科学为一体的边缘学科7、会计电算化下,存贮介质的特点是。
A、可以直观地看到B、可以通过复印方式保存副本C、不能直观地看到,必须通过计算机显示或打印输出D、及手工方式一样8、对存有会计数据的磁性介质,以下说法正确的选项是。
A、备份一套数据进展留档B、必须进展双备份,并异地存放C、存放地的温度与湿度等环境及纸张的保存条件一样D、借用归还后,只要磁盘未损坏即可归档9、单机系统适用于。
A、小型企业B、大型企业C、中型企业D、会计电算化初期或核算简单的小型企事业单位10、当今许多西方兴旺国家,已将计算机广泛应用于。
A、会计数据处理B、会计管理B、C、财务管理以及预测与决策D、会计数据处理、管理、预测与决策11、通常以下设备中不能作为输入设备的是。
A、鼠标B、显示器C、键盘D、扫描仪12、在微机中,运算器的主要功能是。
A、算术运算B、逻辑运算C、算术运算与逻辑运算D、信息处理13、在计算机内部一般采用代码表示各种数据。
2020年7月英语四级答案真题解析

2020年7月英语四六级答案及真题解析阅读四级第一套选词填空“Science and everyday life cannot and should not be separated.”Those were the words uttered by pioneering British scientist Rosalind Franklin, who firmly believed that the pursuit of science should be (26) ______ to all.As a woman working in the first half of the 20th century, Franklin ’s contributions to some of the greatest scientific discoveries of our time –including the structure of DNA –were sadly (27) ______ in her lifetime. One of my proudest moments in my role as universities and science minister was being able to go some way to redress this injustice last month, by unveiling the new Mars rover named after this brilliant British scientist.Today, on International Women Women’’s Day, it is only right that we recognise the important work of female scientists like Franklin and seek to honour her memory by inspiring more women and girls to follow in her footsteps.More than 60 years after Franklin ’s death, we are (28) ______ living in a different world, where women play an important part in every echelon of our society –not least in science, innovation, higher education and research.universities UK universities are are world leaders when it comes to advancing and (29) ______ gender equality. The Athena SWAN charter, initially established to improve the representation of women in scientific disciplines in higher education, now has 145members. It has also expanded to promote gender equality in multiple disciplines –including the arts, social sciences, humanities, business and law.In the past decade, we have seen a (30) ______ increase in England in the number of women accepted on to full-time undergraduate degrees in science, technology, engineering and maths (Stem subjects). And in the last academic year, women (31)______ for more than half of all Stem postgraduates at UK universities. The’s representation in science government is taking further steps to improve womenand has today awarded nine inspiring women £50,000 to develop inventions to tackle the challenges and seize the opportunities we face as a society. From new materials to cut down on plastics pollution to special devices to improve posture and comfort for wheelchair users, these women are at the forefront of creating the new technology for tomorrow.This is significant progress, but access to higher education is only half of theequation. To have real equality in the sector, we need to ensure talented women areable to progress into the academic and leadership roles they desire, and get theremuneration they deserve.Data shows us the (32) ______ to success gets harder for women to climb the further up they go. Although women make up the majority of undergraduates in our universities, just under half of academic staff are female. At (33) ______ levels, only a quarter of professors are women, and black women make up less than 2% of all female academic staff.I welcome the introduction of pro-active strategies like the new initiative at theUniversity of Leicester, which I am visiting today, to increase the number of female professors by 1.5% each year, with the overall goal of having 30% professorships held by women by 2020.There are also stark differences in pay across grades. The gender pay gap based on median salaries across the sector in 2016-17 was 13.7%, (34) ______ there is stillsome way to go to ensure women are rising through the ranks to higher grade positions and being paid (35) ______.四级第一套选词填空“Science and everyday life cannot andshould not be separated."26. A) accessible27. J) overlooked28.0) thankfully29. K) promoting30. E) considerable31. B) accounted32. G) ladder33. L) senior34. N) suggesting35. D) appropriately【仔细阅读】51.W hat is scientists'finding about dreaming?A) It involves disconnected,weirdimages.B) It resembles fragments of sciencefictionC Dreaming about a learned task better sits performanceD) Dreaming about things being learned disturbs one's sleep sleep【答案】【答案】【答案】C C【定位】【定位】..researchers ..researchers are coming to recognize that dreaming is an essentiapart of understanding understanding,, organizing and retaining what we learn.52. W hat happens when one enters a dream state?A) The body continues to act as if the sleeper were awake.B The neural activity of the brain will become intensifiedpC) The brain behaves as if it were playing a virtual reality videogame.The brain once again experiences the learning activities of the day.D)【答案】【答案】D D【定位】【定位】While While we sleep sleep,, research indicates indicates,, the brain replays the patterns ofactivity it experienced during waking hours , allowing us to enter what onepsychologist calls an eur a/(神经的神经的) ) virtual reality53. W hat does the brain do while we are sleeping?A) It systematize s all the data collected during the day.B) It substitute sold information with new data.C) It processes and absorbs newly acquired dataSpankD) It classifies information and places it in different files.【答案】 C【定位】【定位】This This shows that while our bodies at rest rest,, our brains are drawingwhat's important from the information and events we recently encounteredthenintegrating that data into the vast store of what we already know.作文 略英语四级翻译练习题英语四级翻译练习题::火锅火锅中火锅中,,重庆火锅重庆火锅(hotpot)(hotpot)(hotpot)最著名,最著名,最著名,也最受欢迎。
2023年四级选词填空

You probably haven’t taken the time to think of all the work that went into creating the shirt on yourback. I mean, how hard it could be to create fabric and 26_________it into a shirt shape. Don’t machines do all that? Well, creating fabric from cotton, which is the most27_________clothing material, is actually a process that involves a lot of water, 2,700 liters per shirt to be28_________. Take a look at the video below from National Geographic for some more mind-blowing 29_________about cotton clothing production.Clean water is 30_________becoming one of the most sought-after resources in the world. Given how large the31_________and cotton industries are, they take up a lot of our fresh water demands across the world,according to The Huffington Post. The video from National Geographic was created to spread32_________of how environmentally harmful cotton is. But the situation can be made better. Through better water management and farming practices, water usage in cotton production can be cut down by 33_________40percent.Called“Better Cotton”, this environmentally conscious product will save millions of liters of water ayear simply from34_________the demands of cotton production. Cotton doesn’t have to go, since it is, afterall, one of the most useful cash crops across the globe. However, as water supplies35_________,farmers andconsumers need to be more conscious of the effect that these products have on the environment as a whole.答案:26-30 LBENF 31-35 OCIKMMorocco is responding to increasing energy demands by setting up one of the largest solar plants in theworld.The Noor solar power station is 26_________in the city of Ouarzazate and, once completed, will generate580 million watts of electricity. The World Bank estimates it will serve 1.1 million people. It’s 27_________to be completed soon.Morocco’s current energy comes28_________from imports. The nation hopes to get 50 percent of itsenergy from renewable sources by 2030. With demand for energy 29_________at an annual rate of 7 percent,the new solar plant could be a 30_________part of that goal.“This makes Morocco a big 31_________in the field of solar energy in the Arab region and the Africancontinent. It could also be a forerunner for many other countries in the world that 32_________on foreignimports of energy,”said Ali Hajji, a solar energy specialist and engineering professor.Experts believe that the Middle East and North Africa have huge33_________for solar energy projects.This is partly because of adequate sunlight and partly because technology has become more 34_________in the region.“The last few years have seen a realization of 35_________how competitive solar technologies can be,”said Michael Taylor, a senior analyst at the International Renewable Energy Agency.答案:26-30 HOINC 31-35 LDMAGWhether you re just having a down day or a down period, taking a walk can instantly lift your mood,especially when you go outdoors. Not only can walking make you less depressed, but according to a newstudy, depression sufferers who took a 26_______ walk showed just as much improvement in their 27_________as people taking medicine. In fact, 60 -70 percent of the participants in the study could no longer even be28_________as depressed.Bone density may not be one of the most exciting health benefits of walking, but it’s an important one. People with stronger bones avoid osteoporosis (骨质疏松症) and all the problems that 29_________with it,like breaks and other disabilities. And the best way to get strong, healthy bones is by doing weight-bearingexercises like running, dancing and walking, according to a large study. But as regards bones, it’s 30_________use it or lose it: To keep your bones strong you have to keep exercising. The researchers found that adults who walked regularly had better bone density throughout their lives than their 31_________ friends.Taking a walk can be great for 32_________your head or blowing off some steam. It also provides a great opportunity to 33_________with friends and family, far away from electronics and other 34_________ at home. Even better, you set a powerful example because when they see you35_________the benefits of walking, they’ll be encouraged to walk more, too.答案:26-30 GNDFH 31-35 KECIM。
人文英语1unit6写作训练答案

人文英语1unit6写作训练答案第一套题一、选择填空题目1—Though I have been drinking, I can drive home safely.—No, I will be the driver.正确答案是:When you drink, you can't drive.题目2—Seat belts save lives.—正确答案是:It's true. I agree.题目3He suggested that the drunk driver _________.正确答案是:be punished题目4The police asked the driver to __________ the car to have an alcohol test.正确答案是:pull over题目5He ______ in jail because he broke the traffic law last night.正确答案是:drank题目6—Ok, I'll drink my last can of beer when I drive home.—正确答案是:No way. You'll be stopped by the police.二、阅读理解:判断题(每题10分)A Car Stopped Just in the Middle of the StreetJoan has been charged with a misdemeanor by asking her 13-year-old son to drive, putting her child in a dangerous situation. It was Joan's 32nd birthday, so she decided to go out for dinner with her 35-year-old boyfriend, Donald, as well as her 13-year-old son, Mike. Joan was so happy that she drank two bottles of wine with her boyfriend. When it was time to go home, both Joan and Donald were too drunk to drive. They knew it clearly that both of them couldn't drive home safely after that much wine, so they sat in the back seat and asked Mike, Joan's 13-year-old son, to drive the 2008 Land Rover.Being a driver for the first time in his life, Mike could receive no help from his mom or Donald. They were too drunk to tell him clearly what to do. He started the car nervously, but when he realized he couldn't control the car at all, he was scared and depressed. He decided to stop the car and refuse to drive any further. He called the police for help. When the police arrived, they found the car was stopped right in the middle of the street.操作提示:句子正确选择下拉选项框为“T”;句子错误选择下拉选项框为“F”。
建筑材料习题及答案(3)
《建筑材料》习题集第一套一、填空题1、大多数建筑材料均应具备的性质,即材料的 (基本性质) .2、材料的(组成)及( 结构)是决定材料性质的基本因素,要掌握材料的性质必须了解材料的(组成)、( 结构)与材料性质之间的关系。
3、建筑材料按化学性质分三大类:(有机) 、(无机) 、(复合材料)。
4、建筑材料的技术性质主要有:(物理) 、(力学)、( 耐久性) .5、当水与材料接触时,沿水滴表面作切线,此切线和水与材料接触面的夹角,称(润湿角) 。
6、材料吸收水分的能力,可用吸水率表示,一般有两种表示方法:(质量吸水率W )和(体积吸水率W0 ) 。
7、材料在水作用下,保持原有性质的能力,称(耐水性)用(软化系数) 表示。
8、材料抵抗压力水渗透的性质称 (抗渗性) ,用 (渗透系数 )或 (抗渗标号 )表示。
9、材料抗渗性大小与(孔隙率P ) 和 (孔隙特征)有关。
10、材料的变形特征有两种类型 (弹性) 和( 塑性) 。
11、根据材料被破坏前塑性变形显著与否,将材料分为 (塑性材料)与(脆性材料)两大类。
二、判断题1、材料的组成,即材料的成分。
(√ )2、密实材料因其V、VO、V`相近,所以同种材料的ρ、ρ0、ρ0/相差不大。
( √ )3、松散材料的ρ0、ρ0/相近。
(× )4、材料的体积吸水率就是材料的开口孔隙率。
(√ )5、对于多孔的绝热材料,一般吸水率均大于100%,故宜用体积吸水率表示。
( √ )6、吸水率就是含水率。
(× )7、孔隙率又称空隙率。
( × )8、冻融破坏作用是从外表面开始剥落逐步向内部深入的。
(√ )9、由微细而封闭孔隙组成的材料λ小,而由粗大连通孔隙组成的材料λ大。
( √ )10、传热系数与热阻互为倒数。
(√ )11、水的比热容最小。
( × )三、选择题1、某铁块的表观密度ρ0= m /( A ).A、V0B、V孔C、VD、V0′2、某粗砂的堆积密度ρ0/`=m/( D )。
教师晋级、应聘考试复习题五套(附答案)
教师晋级、应聘考试复习题五套(附答案)(第一套)一、选择题: 1.最早提出教育要适应儿童的年龄阶段,进行和谐发展的教育思想家是[ ]A.柏拉图B。
昆体良C.皮亚杰 D.亚里士多德2。
近年来学校提出“教书育人、管理育人,服务育人”,所以,学校中的管理者和工作人员都被看成是[]A。
教师B。
管理人 C.教育者D。
服务人员3。
记载柏拉图教育思想的著作是[ ]A,《理想国》B。
《政治学》C.《爱弥尔》D。
《论演说家的教育》4.将一个具体单位或一个学生作为研究对象,对它的若干现象、特征和过程作全面深入,甚至长时问的调查研究,以把握它的本质或变化规律的研究方法是[]A.调查法B。
实验法C.访谈法D。
个案法5.科学知识的再生产有多种途径,其中最主要的途径是[ ]A。
学校教育B.家庭教育C。
社会教育D.继续教育6.在游戏中,男生喜欢扮演坚贞不屈的英雄,女生则喜欢扮演温柔美丽的角色。
这体现了个体身心发展的[]A.不均衡性B。
阶段性C.个别差异性D.互补性7。
在个体发展的动因问题上,坚持“内发论”的代表人物是[ ]A.洛克B.孟子C.华生D。
荀子8.我国古代各个历史时期的教育要求受教育者“修己、立己、成己”,以养成个人的“个性、智能、学识”,并要外化出去。
这反映了教育目的的[]A。
“社会本位论"价值取向 B.“个人本位论”价值取向C。
“文化本位论”价值取向D。
“官本位"价值取向9。
传统“师遭尊严”的师生关系主要是一种[ ]A。
“以教师为中心”的****型师生关系B。
“以儿童为中心”的放任型师生关系C.民主合作式的师生关系D.教学相长的师生关系10。
教师对学生进行体罚或变相体罚侵犯了学生的[ ]A.隐私权B。
名誉权C.人格尊严D.受教育权11。
制约课程的三大因素是[]A.社会、知识和儿童B。
课程计划、教学大纲和教科书C.政治、经济和文化D.知识、能力和需要12。
“一个坏的教师奉送真理,一个好的教师则教人发现真理”,这句话体现了教学的[]A。
第一套试题
一、单选题:每一道考试题下面有A、B、C、D、E五个备选答案。
请从中选择一个最佳答案,并在答肺部肿瘤(单选题1-20)1.男性,9岁,常年咳嗽,无其他自觉症状,肺CT示楔形高密度影,中央浓集呈团块状,边缘模糊不清,最可能的诊断是 ( )A.结核瘤B.原发性肺癌C.炎性假瘤D.纵隔肿瘤E.支气管扩张正确答案:C2.男性,54岁,刺激性咳嗽、咯血丝痰2周,伴双肘关节、膝关节疼痛,吸烟30年,每天20支;查体:双肘关节、膝关节肿胀、压痛,无畸形或活动障碍。
最可能的原因为 ( )A.肺癌骨转移B.类风湿关节炎C.肥大性肺性骨关节病D.骨肿瘤E.多发性骨髓瘤正确答案:C3.关于肺癌的治疗原则,下列哪一项说法不正确 ( )A.早期患者以手术治疗为主B.鳞癌与小细胞癌的治疗原则不同C.小细胞肺癌以放疗为主,辅以手术和(或)化疗D.Ⅲa期患者可采取辅助化疗+手术治疗和(或)放疗E.远处转移患者以姑息治疗为主正确答案:C4.男,74岁,咳嗽,咳痰1月余,咯血丝痰1周伴胸痛,最可能的诊断为 ( ) A.右上肺浸润型肺结核B.右上肺不张C.右侧中央型肺癌并右上肺不张D.右侧包裹性积液E.右肺上沟瘤正确答案:C5.女性,51岁,胸痛数月,痰血2天,X线检查见左肺门结节影,最可能的诊断是 ( )A.左肺癌B.左侧炎性假瘤C.左侧纵隔肿瘤D.左肺转移瘤E.支气管扩张正确答案:A6.男,33岁,背部不适,无发热,CT图像示:多发结节伴支气管充气征和支气管周围多发小结节,最可能的诊断是 ( )A.椎旁脓肿B.神经源性肿瘤C.脑脊膜膨出D.食管囊肿E.淋巴瘤正确答案:B7.男性,57岁,咳嗽、咯血丝痰2周,水样腹泻、喘鸣、皮肤潮红、阵发性心悸1周,有吸烟史。
下列哪一项检查对诊断意义最大 ( )A.痰涂片找抗酸杆菌B.X线胸片C.大便细菌培养D.肺功能激发试验E.24小时动态心电图正确答案:B8.50岁,男性,右侧胸痛、咳嗽、咯血3个月,CT示边缘模糊的斑片状钙化,最可能的诊断 ( )A.纵隔肿瘤B.肺结核C.肺癌D.胸膜间皮瘤E.韦格肉芽肿正确答案:C9.男性,65岁。
数据结构试题
数据结构试题部分题目或答案有问题,现将已经发现的公布如下,同学在作这些模拟题的时候应着重做题方法的理解,遇到问题以教材或课件为准,不确定的地方可找同学商量或问我(1)试卷1第一套填空题第1题,试卷1第2套选择题第3题关于循环队列队头指针和队尾指针的约定与教材不一致,以教材或课件为准,实际上front指向的是队头元素,rear指向当前尚未被占用的第一个队列空间,队慢或队空的判定条件及入队/出队等操作具体可参考课件或教材(2)试卷1第一套应用题第5题,不声明邻接点顺序时默认编号最小的邻接点为第一邻接点,该图的深度优先遍历序列为*****,答案错。
此外,当给定邻接表时则邻接点顺序按照邻接表中的前后顺序确定,如试卷1第二套填空题第8题(3)试卷1第五套应用题第4题,两种方法处理冲突的方法下所求ASL值相等都为7/6(4)试卷1第五套填空题第8题答案给出的是小顶堆需满足的条件,大顶堆满足ki=k2i ki=k2i+1 (5)试卷1第一套填空题第9题模式匹配的BF算法以书中答案为准,两者区别在于,教材中存储字符串的数组的0号单元不存放有效字符,而试卷答案认为0号单元也放数组(6)试卷1第二套填空题第7题给定初始序列建堆未声明建大顶堆还是小顶堆,答案中给出的是小顶堆,大顶堆也要会建(7)试卷1第二套应用题第1题第4趟直接插入排序的结果应为(22,40,45,48,80,78);答案中给出的实际为第三趟,关键在于首元素自身有序不算一趟(8)试卷1第二套填空题第2题入栈操作以教材为准,教材中top是指向的栈顶(第一个空位置)的指针,与该套试卷中栈顶结构不一样,以教材为准(9)试卷1第三套填空题第12题答案中给出的不是拓扑序列,正确的是1423 (10)试卷1中多处遇到空指针NULL时写的是0而非NULL,实际两者皆可(11)试卷1第4套填空题第2题双向链表的删除答案错,应为p―llink-rlink=p-rlink; p-rlink-llink=p-llink;此外,注意课堂中讲的指针名和操作方法(12)第4套填空题第6题答案错,设哈夫曼树中共有99个结点,则该树中有____50_____个叶子结点;若采用二叉链表作为存储结构,则该树中有__100___个空指针域。
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1.在网络上交流信息需要遵循一定的标准,目的是为了信息表达的
(A)自由化(B)通俗化(C)数字化(D)规范化
2.十六进制数57H转换成二进制数是
(A)(101111)2(B)(11111)2
(C)(1010111)2(D)(1011110)2
3.用UltraEdit软件观察字符内码时,结果如下图所示,从中可以看出用于存储字母"P"需要的字节数是
(A)1 (B)2 (C)3 (D)4
4.下图是某用户的电子邮箱管理窗口,从图中我们可以看出
(A)该用户收件箱内共有4封邮件
(B)该用户的电子邮箱地址为hktest_ok@
(C)该用户收件箱共有4个附件
(D)该用户当前查看的是草稿箱
5.用计算机处理彩色图像时,一般用RGB来表示图像的
(A)颜色(B)分辨率(C)大小(D)存储容量
6.下图是一个用Access软件创建的数据表,当前记录是
(A)第1条(B)第2条(C)第5条(D)第6条
7.某放射性同位素每隔m小时,该物质质量就减少为原来的一半,现若有该物质x克,经过多少小时,该物质的质量小于y克。
下图是描述这一计算问题的部分流程图,其执行流程属于
(A)顺序模式(B)选择模式(C)循环模式(D)树型模式
8.有5位运动员100米成绩依次为13.8,12.5,13.0,13.2,13.4,
若采用选择排序算法对其进行从小到大排序,则第二趟的排序结果是
(A) 12.5 13.8 13.2 13.4 13.0
(B) 12.5 13.4 13.2 13.8 13.0
(C) 12.5 13.0 13.8 13.2 13.4
(D) 12.5 13.2 13.8 13.4 13.0
9.在Visual Basic中,如果变量a需要存储英文单词,那么变量a的数据类型应定义为
(A)Date (B)String (C)Integer (D)Boolean
10.Visual Basic表达式Len("12345")的值是
(A) 12345 (B) 5 (C) 0 (D)-12345
11.在Visual Basic中,表示鼠标单击的事件名是
(A)Click (B)KeyPress (C)Load (D)DblClick
12.有如下Visual Basic程序段:
For j=1 To ______ Step 2
t=t*j
Next j
要使循环体t=t*j执行5次,循环变量的终值可以是
(A)-5 (B)0 (C)5 (D)10
13.在Visual Basic中,若x是正数,则下列逻辑表达式值一定为真的是
(A)Not(x>0) (B)x<0 (C)Not(x<>0) (D)Not(x<=0)
14.在计算平均重量x时,结果中产生了许多位小数,若需要对x保留一位小数,并对第二位小数进行四舍五入,则下列表达式中正确的是
(A)Int(x*10+0.5)/10 (B)Int(x*100+0.5)/100
(C)Int(x*10)/10 (D)Int(x+0.5)
一套
1.有如下Visual Basic程序段:
i=6
i=i+1
j=2*i-1
该程序段运行后,变量j的值为。
2.有如下Visual Basic程序段:
x = 1.6
If x > 0 Then
x = x+2
Else
x = x-2
End If
该程序段运行后, 变量x的值为。
3.有如下Visual Basic程序段:
s = 0
For i = 1 To 10
If i Mod 3 = 0 Then s = s + i
Next i
该程序段运行后,变量s的值为。
4.某学生说他的年龄不低于10岁,且他的年龄减去10,平方以后得到的一个数,恰好是他的年龄加上10,问他的年龄多大?
设这位学生年龄为y,他年龄减去10的平方为r,则r=(y-10)2,则y满足的表达式为:(y - 10)2=y + 10
解决此问题的算法流程图如图VB-1所示,相应的Visual Basic程序如下,在(1)和(2)划线处,填入合适的语句或表达式,把程序补充完整。
Private Sub Command1_Click()
Dim y As Integer, r As Integer
y = 10
r = (y - 10) ^ 2
Do While (1)
(2)
r = (y - 10) ^ 2
Loop
Text1.Text = Str(y)
End Sub
程序中划线处(1)应填入
程序中划线处(2)应填入。