试卷 -含答案 (7)-推荐下载
大学英语试题7

replaced acquaintance represented offender
devoted criminal
at turned me down. After
that, my wife left me and I had to sell all of my stocks and my house.
姓名:___________________________ 班级:____________________________ 学号:___________________________ 日期:____________________________
unit 7 vocabulary & reading
Yesterday, I went to the police station. I was 1.
embarrassed
instructed spotted guided reflected
confused scanned pressure identify
burden connect albums though
cautiously however
to look at a line of men
through a window to recognize the man who stole my wallet. The men stood so stiff against
the wall and looked so serious. The officer asked me if I could 2.
could look through some photo 10. confidence to do so.
2016年英语六级(CET-6)考试新题型预测试卷(7)

Part I Writing (30mintes)1、Directions: For this part, you are allowed 30 minutes to write a composition on the topic How to Solve the Housing Problem in Big Cities ? You should write at least 150 words according to the outline given below in Chinese:1.住房问题在⼤城市变得越来越严重2.住房问题产⽣原因及给城市带来的影响3. 建设⼀个解决办法(如:多造⾼层建筑;向地下卫星城市;疏散城市⼈⼝等)How to Solve the Housing Problem in Big Cities?Part II Reading Comprehension (15 minutes)2、Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1 - 7, choose the best answer from the four choices marked [A] ,[B], [C] and [D]. For questions 8 - 10, complete the sentences with the information given in the passage.KOALA Many people love the cute koala bear. This animal has been made into stuffed toys all over the world. But it is rare to see this creature alive and moving, because it's gradually becoming extinct. The koala, like the kangaroo, is actually a marsupial (an animal which carries its babies in a pocket of skin on its body). It contains a small pouch for its young. For this reason, the koala is not related to true bears. In appearance, it is a combination of a monkey and a kangaroo. Koala is native to Australia, although they are now chiefly found in New South Wales and Queensland. The koala has been hunted since the middle of 20th century for fur and food. Today, anyone found harming a koala is severely punished by law. Koalas get their endearing appearance from a covering of gray fur and little tufts of white hair on the sides of their faces. Their eyes are small and black, set in their head. They have large ears and curved noses, but not tail. They use their arms and paws to climb through the trees. Koalas have interesting living habits. They are nocturnal, which means that they move around chiefly at night. Koalas do not stay on the ground. They move from tree to tree, carefully lowering and raising themselves by their paws. Koalas have a surprisingly long life span, which can range from 9 to 20 years, in rare cases. The koala is the only mammal, other than the Greater Glider and Ringtail Possum, which can survive on a diet of eucalyptus leaves. Eucalyptus leaves are very fibrous and low in nutrition, and to most animals are extremely poisonous. To cope with such a diet, nature has equipped koalas with specialized adaptations. A very slow metabolic rate allows koalas to retain food within their digestive system for a relatively long period of time, maximizing the amount of energy able to be extracted. At the same time, this slow metabolic rate minimizes energy requirements. Koalas also sleep somewhere between 18 and 22 hours each day in order to conserve energy. Koalas eat only the leaves of the eucalyptus, which is another reason that they are now becoming extinct. The eucalyptus tree is disappearing from their natural habitats, fighting a battle against extinction all its own. The koala's worst enemy, besides hunters, is fire. When a tree is inflamed, often they cannot run fast enough to save themselves. Baby koalas are in danger around certain kinds of lizards and eagles, although they are protected today by natural habitats set up for them. It is interesting to note that many koalas die from being hit by cars, and some are even attacked by dogs! Their main form of3、Koalas are often seen actively________A.at nightB.during the dayC.on the groundD.climbing trees4、Which of the following is true about eucalyptus leaves?A.They are extremely poisonous to all mammalB.They are only eaten by koalaC.They are getting rarer and rareD.They are low in fibr5、Koalas can only stay awake for_____________A.18 hours a dayB.between 2 and 6 hours a dayC.between 2 and 6 hours a weekD.between 18 and 22 hours a week6、What does happen after a young koala's brain is fully developed?A.It begins to turn in the pouch and kicB.It emerges outside its poucC.It is independent of its motheD.It begins to live in trees alon7、To save koalas, what do people have to do?A.To save eucalyptuB.To grow koalas in zooC.To ban hunting koalaD.To lengthen their life-spa8、After nine months a baby" koala______A.lays in the mother's pouchB.has a head larger than its bodyC.does not need its motherD.has fully-formed teethReading Comprehension (15 minutes)9、People who cut down eucalyptus trees are _______to koalas.10、Foreign__________ in its environment are a great problem for koalas.11、Hunting and forest fires kill off many koalas but now their number one threat is _________.Part IV Reading Comprehension Reading in Depth (35 minutes)12、Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter.Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.Questions 12 to 21 are based on the following passage. It's a 12 often requested in lonely hearts ads and scientists have now shown that a good sense of humor is 13 for women, but not men, in choosing a romantic partner. A woman is even willing to 14 other shortcomings in a man if he can make her laugh, researchers said on Tuesday." Our results suggest that humor can 15 affect desirability as a relationship partner but this effect is most likely to occur when men use humor and are 16 by women," said Eric Bressler, of Westfield State College in Massachusetts. Bressler and Sigal Balshine, of McMaster University in Ontario, Canada, demonstrated in an experiment that a good sense of humor -- G.S.O.H. as it appears in personal ads -- does make a 17 They showed groups of women pictures of two equally 18 men and presented autobiographical statements that were either funny or serious. After 19 the experiment and showing groups of men photographs of two women, they asked both sexes to select who they would choose as a romantic partner. The humorous people were seen as more socially adept but less trustworthy, honest and intelligent. Men did not select the funny person but women did."Women chose funny men as relationship partners despite often 20 them as less honest and intelligent," the researchers said in the study published in the journal Evolution and Human Behavior. Funny men were preferred even if their humor was 21 , the researchers added.A.difference F.unimportant K.positivelyB.evaluated G.rehearsaling L.reversingC.rating H.attractive M.minorlyD.unsophisticated I.important N.overlookE.trait J.overtake O.chasing选:__________13、选:________14、选:_________15、选:___________16、Our results suggest that humor can 1517、as it appears in personal ads -- does make a 1718、They showed groups of women pictures of two equally 1819、选:_____________20、选:__________21、选:____________Part IV Reading Comprehension Reading in Depth (35 minutes)22、Section BDirections: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements, For each of them there are four choices marked A, B, Cand D.You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.Passage OneQuestions 57 to 61 are based on the following passage. Many now have been breathing hot flames at our industry and so I thought it would be time to say my piece this week, after all, we in the business cannot deny that it has been a rough spring for newspaper, editors and reporters. Ethical scandals great and small have soiled newsrooms from coast to coast. Everyone knows about the profound deceits of Jayson Blair at The New York Times, and the "Writergate" controversy involving Rick Bragg, which led to the departure of the two top editors at the paper. Other misdeeds have ranged from two reporters at. The Salt Lake Tribune selling information to The National Enquirer, to a food writter for The Hartford Courant fired for plagiarizing recipes. Are newspaper standards going to pot? Some say ethics are worse than ever or are they? The past is filled with people running photos of wrestlers in the sports section in exchange for money. In fact, ethical breaches may be less of a problem than 20 years ago. A lot of newspapers are cutting corners, but the standards in the business have improved. There were things going on in the past -- such as reporterswriting speeches for politicians they covered and taking bribes from lobbyists -- but people back then were quietly moved out or they left on their own. There was no public display. The industry as a whole is in trouble because, due to media concentration, people at the top,are taking out too much money and driving the profits up. The perception is that the real customers are not those who read the paper but those who buy the stock, which damages the profession.Some of this is about resource pressure. Copydesks are overloaded and there is not enough time and more reporters are having to report by phone. The larger the size of newspapers, the less communication between divisions there tends to be. Reporters don't climb the stairs anymore, they are highly-trained people who sit in their offices and write term papers and won't sully themselves going to a greasy housing project or stand out in the rain for a few hours. The economics of journalism along with technological changes has created an atmosphere of trying to get enormous amounts of information as rapidly as possible. The important thing is to make sure that the ownership understands the value of a news organization with integrity and every paper needs to slow down and remind ourselves that we have nothing to sell if the readers don't b e l i e v e u s . b r b d s f i d = " 1 4 8 " > T h e m a i n i d e a o f t h e f i r s t p a r a g r a p h i s t h a t _ _ _ _ _ _ _ _ _ _ _ _ _ _。
2023年部编版七年级地理(下册)期末试卷及答案(下载)

2023年部编版七年级地理(下册)期末试卷及答案(下载)(时间:60分钟分数:100分)班级:姓名:分数:一、选择题(共25个小题,每题2分,共50分)1、中纬度是指()A.0°~30° B.23.5°~66.5°C.30°~60° D.60°~90°2、澳大利亚国徽上的两种动物是()A.袋鼠、鸸鹋 B.考拉、袋鼠 C.鸭嘴兽、鸸鹋 D.河马、大象3、被称为世界“加油站”的国家是()A.俄罗斯 B.日本 C.伊朗 D.伊拉克4、东南亚中南半岛上的地形特点()A.中部较为低下,四周高B.地形以山地为主C.山河相间,纵列分布D.南部较低,北部较高5、东南亚的位置特点是()A.三洲五海之地B.连接东西方的铁路枢纽C.“十字路口”的位置D.位于印度洋和大西洋之间6、关于我国地理位置的描述,正确的是()A.位于亚洲东部,大西洋西岸B.地跨寒、温、热三带,北回归线穿过南部C.最北端位于黑龙江与乌苏里江汇合处D.东西跨经度广,产生了时间上的差异7、南极地区和北极地区的代表动物分别是()A.企鹅、鲸 B.企鹅、磷虾 C.磷虾、北极熊 D.企鹅、北极熊8、关于亚洲的叙述,错误的是()A.世界上面积最大的大洲B.东西距离最长的大洲C.跨经度最广的大洲D.跨纬度最广的大洲9、有“三洲五海之地”之称的地区是()A.欧洲西部 B.中东 C.澳大利亚 D.亚洲东南部10、本初子午线是指()A.0°纬线B.0°经线C.180°经线D.20°W经线11、有比例尺①1:100000②1:10000,③1:1000图幅相同的三幅地图,据此判断下列说法正确的是()A.①图比例尺最大 B.②图表示的地理事物最详细C.③图表示范围最大 D.若其中一幅是校园平面图,最适用的是③图12、甲地位于东经52°、北纬47°,乙地位于西经152°、南纬74°,甲地位于乙地的()A.西北方B.东北方C.西南方D.东南方13、下列图例中表示铁路的是()A. B. C. D.14、下列经纬线不穿过亚洲的是()A.赤道B.北回归线C.北极圈D.本初子午线15、下图为某区域一月份等温线图,三条等温线的气温关系是a>b>c,据图判断下列说法不正确的是()A.该区域位于南半球 B.甲地比乙地气温高C.该区域此时正值夏季 D.如果甲乙纬度相同,甲可能是海洋16、我国濒临的海域中,属于我国内海的是()A.渤海、黄海 B.黄海、南海C.台湾海峡、琼州海峡 D.渤海、琼州海峡17、世界人种划分的主要依据是()A.语言文字B.体质特征C.风俗习惯D.居住环境18、美国“硅谷”最重要的工业部门是()A.电子工业 B.汽车工业 C.钢铁工业 D.宇航工业19、本初子午线是指()A.0°经线 B.180°经线 C.20°W经线 D.160°E经线20、中南半岛的主要大河,源头在我国境内,流入太平洋的是()A.红河湄公河 B.萨尔温江伊洛瓦底江C.湄公河湄南河 D.红河怒江21、拉丁美洲是指()A.美国以南的美洲国家和地区B.墨西哥以南的美洲地区C.巴拿马运河以南的美洲地区D.整个南美洲22、关于板块构造和板块运动的叙述,正确的是A.阿拉伯半岛属于亚欧板块 B.台湾岛属于太平洋板块C.红海是板块碰撞挤压形成的 D.喜马拉雅山脉是板块碰撞挤压形成的23、吉林省位于五带中的()A.热带B.北温带C.南温带D.北寒带24、美国旧金山南面,有一片环境优美、交通便捷的狭长谷地,被称为“硅谷”。
汽车售后服务工程自考试题 (7)

.浙江省2009年7月自考汽车售后服务工程试卷课程代码:05840一、单项选择题(本大题共15小题,每小题2分,共30分)在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。
错选、多选或未选均无分。
1.汽车服务的重要内容是( )A.可持续发展B.客户满意C.信息技术D.一体化思想2.汽车售后服务CI化关键在两个方面,即可操作的标准制订和正确的( )A.服务理念规划B.销售策略C.生产组织D.售后服务3.现在的汽车销售模式主要有大卖场模式、汽车超市模式和( )A.品牌模式B.专卖店模式C.厂家模式D.市场模式4.金融机构对消费信贷的管理要求,主要突出“三性”,即安全性、流动性和( )A.层次性B.相关性C.赢利性D.整体性5.“社会营销观念”的决策主要有四个组成部分:用户需求、用户利益、社会利益和( )A.企业利益B.市场需求C.竞争需求D.利益协调6.汽车产品用户按用户购买的目的和动机不同可分为产业用户和( )A.单位用户B.消费者用户C.集团用户D.个人用户7.汽车产品成本包括研制成本、储运成本和( )A.使用成本B.召回成本C.免费维修成本D.营销成本8.交强险的受益方是( )A.本车人员B.被保险人C.第三者D.货物9.二手车评估的主体是( )A.待评估的车辆B.经销商C.评估业务的承担者D.车辆拥有人10.二手车动态检查项目主要是( )A.启动检查B.怠速检查C.工况检查D.制动检查11.汽车保险是以汽车本身及其相关利益为保险标的的一种财产保险,其财产值是( )A.定值的B.不定值的C.增值的D.贬值的12.除国有资产的二手车外,二手车鉴定评估实行( )A.买方原则B.卖方原则C.自愿原则D.强制原则13.保险公司现场查勘或给与受理意见的时限为( )A.8小时B.24小时C.32小时D.48小时14.汽车消费信贷程序管理的中心环节是贷前调查、贷时审查和( )A.信用分析B.贷后检查C.贷款申请D.愈期处理15.汽车产品的基本定价方法有:需求导向定价法、成本导向定价法和( )A.成本加成定价法B.目标定价法C.竞争导向定价法D.市场定价法二、多项选择题(本大题共5小题,每小题2分,共10分)在每小题列出的五个备选项中至少有两个是符合题目要求的,请将其代码填写在题后的括号内。
一年级下册数学试卷下载打印

一年级下册数学试卷一、填空题(每题2分,共20分)1. 写出下面的数字:七(_____),十(_____),十五(_____)。
2. 9比5多(_____),7比11少(_____)。
3. 一个两位数,个位上是8,十位上是3,这个数是(_____)。
4. 在()里填上“>”、“<”或“=”:7+8()14 12-3()9 5+5()105. 一个正方形有()条边,每条边都()。
6. 1元=()角,1角=()分。
7. 早上,太阳从()边升起。
8. 20里面有()个十。
9. 一个数,从右边数起,第一位是()位,第二位是()位。
10. 写出三个比9小的数:(),(),()。
二、选择题(每题2分,共10分)1. 下列图形中,是长方形的是()。
A. □B. △C. ◯D. ◇2. 9+5的得数()。
A. 大于14B. 小于14C. 等于143. 13-7的结果是一个()。
A. 一位数B. 两位数C. 三位数4. 下列算式中,得数最大的是()。
A. 8+3B. 15-5C. 10-75. 一个两位数,十位上的数字与个位上的数字相同,这个数可能是()。
A. 12B. 33C. 46三、计算题(每题2分,共20分)1. 直接写出得数:5+7= 10-4= 12-8= 3+9= 6+6=15-5= 7+8= 9-3= 16-6= 2+8=2. 列竖式计算:11+7=17-9=四、应用题(每题5分,共25分)1. 小明有10本故事书,小红给了小明3本后,小明现在有多少本书?2. 妈妈买了12个苹果,吃了4个,还剩下多少个苹果?3. 一(1)班有男生15人,女生13人,一共有多少人?4. 小华有16颗糖,他给了弟弟8颗后,他们两人的糖一样多。
弟弟原来有多少颗糖?5. 一根绳子长20米,用去10米后,还剩多少米?五、附加题(5分)用5、7、9三个数字,你能组成哪些两位数?请把它们写下来。
---参考答案:一、填空题1. 7,10,152. 4,43. 384. >,=,=5. 4,相等6. 10,107. 东8. 29. 个,十10. 答案不唯一,如:1,2,3二、选择题1. A2. C3. A4. B5. B三、计算题1. 12,6,4,12,12,10,15,6,10,102. 18,8(竖式略)四、应用题1. 10+3=13(本)2. 12-4=8(个)3. 15+13=28(人)4. 16-8=8(颗),8-8=0(颗),0+8=8(颗)5. 20-10=10(米)五、附加题57,59,75,79,95,97(答案不唯一)。
考试试卷和答案下载

考试试卷和答案下载一、单项选择题(每题2分,共40分)1. 的官方网站是()。
A. 国家教育考试网B. 省级教育考试院C. 学校教务处D. 个人博客2. 下载考试试卷和答案时,以下哪个行为是合法的()。
A. 未经授权私自下载并传播B. 仅供个人学习使用,不进行商业用途C. 将下载的试卷和答案用于商业牟利D. 将试卷和答案上传至非法网站3. 后,以下哪个用途是被允许的()。
A. 用于个人复习和学习B. 用于商业牟利C. 用于非法传播D. 用于代替实际考试4. 以下哪个不是的正规渠道()。
A. 学校教务处B. 省级教育考试院C. 非法网站D. 国家教育考试网5. 后,以下哪个行为是违法的()。
A. 用于个人学习B. 用于商业牟利C. 仅供自己使用D. 用于复习和准备考试6. 的目的是为了()。
A. 提高个人学术水平B. 用于非法牟利C. 代替实际考试D. 用于个人娱乐7. 以下哪个不是的注意事项()。
A. 确保来源合法B. 遵守相关法律法规C. 随意传播和分享D. 仅供个人使用8. 后,以下哪个行为是不被鼓励的()。
A. 用于个人学习B. 用于商业牟利C. 仅供自己使用D. 用于复习和准备考试9. 的正规渠道包括()。
A. 非法网站B. 学校教务处C. 个人博客D. 省级教育考试院10. 以下哪个是的合法用途()。
A. 用于个人学习B. 用于商业牟利C. 用于非法传播D. 用于代替实际考试二、多项选择题(每题3分,共30分)11. 的注意事项包括()。
A. 确保来源合法B. 遵守相关法律法规C. 随意传播和分享D. 仅供个人使用12. 的正规渠道有()。
A. 非法网站B. 学校教务处C. 个人博客D. 省级教育考试院13. 的合法用途包括()。
A. 用于个人学习B. 用于商业牟利C. 用于非法传播D. 用于复习和准备考试14. 以下哪些行为是时不被允许的()。
A. 未经授权私自下载并传播B. 仅供个人学习使用,不进行商业用途C. 将下载的试卷和答案用于商业牟利D. 将试卷和答案上传至非法网站15. 后,以下哪些行为是违法的()。
【推荐下载】期末试卷-推荐word版 (18页)

本文部分内容来自网络整理,本司不为其真实性负责,如有异议或侵权请及时联系,本司将立即删除!== 本文为word格式,下载后可方便编辑和修改! ==期末试卷篇一:201X人教版六年级数学上册期末试卷(附答案)201X人教版六年级上册数学期末试卷(时间100分钟,满分100分)得分___________一、填空(共20分,其中第1题、第2题各2分,其它每空1分)11、3 吨=()吨()千克 70分=()小时。
2402、()∶()=() =80%=()÷40 13、()吨是30吨的3 ,50米比40米多()%。
4、六(1)班今天出勤48人,有2人因病请假,今天六(1)班学生的出勤率是()。
5、0.8:0.2的比值是(),最简整数比是()6、某班学生人数在40人到50人之间,男生人数和女生人数的比是5∶6,这个班有男生()人,女生()人。
7、从甲城到乙城,货车要行5小时,客车要行6小时,货车的速度与客车的速度的最简比是()。
8、王师傅的月工资为201X元。
按照国家的新税法规定,超过1600元的部分应缴5%个人所得税。
王师傅每月实际工资收入是()元。
139、小红小时行千米,她每小时行()千米,行1千米要用()58小时。
10、用一根长12.56米的绳子围成一个圆,这个圆的直径是(),面积是()。
11、在一块长10分米、宽5分米的长方形铁板上,最多能截取()个直径是2分米的圆形铁板。
12、请你根据图形对称轴的条数按照从多到少的顺序,在括号里填上适当的图形名称。
圆、()、()、长方形。
二、判断(5分,正确的打“√”,错误的打“×” ) 111、7米的与8米的一样长。
????????????????()872、周长相等的两个圆,它们的面积也一定相等。
??????? () 13和1%都是分母为100的分数,它们表示的意义完全相同。
??() 1004、5千克盐溶解在100千克水中,盐水的含盐率是5%。
2021年重庆市高考语文试卷+答案解析(可下载打印)

2021年重庆市高考语文试卷+答案解析(可下载打印)语文试题卷共 8 页。
考试时间 150 分钟。
第 1 至5 题,第7 至9 题为选择题,24 分;第 6 题、第10 至21 题为非选择题,126 分,满分 150 分。
注意事项:1.答题前,务必将自己的姓名,准考证号填写在答题卡规定的位置上。
2.答第 1 至5 题、第 7 至9 题时,必须使用 2B 铅笔将答题卡上对应题目的答案标号涂黑。
如需改动,用橡皮擦擦干净后,再选涂其他答案标号。
3.答第 6 题、第 10 至21 题时,必须使用 0.5 毫米黑色签字笔,将答案写在答题卡规定的位置上。
4.所有题目必须在答题卡上作答,在试题卷上答题无效。
5.考试结束后,将试题卷和答题卡一并交回。
一、(本大题共 3 小题,每小题 3 分。
共 9 分)1.下列词语中,字形和加点空降兵读音全都正确的一组是A.亲和力声名鹊起闹别.(b iâ )扭称.(chēn g)心如意B.倒胃口皇天后土瞭.(liǍo)望哨金蝉脱壳.(qiÀo)C.哈蜜瓜明眸皓齿撑.(chēng)场面姹.(chÀ)紫嫣红D.敞篷车异彩纷呈差.(chÀ)不多白雪皑皑.(Ái)【答案】D考点:识记现代汉语普通话常用字的字音。
能力层级为识记 A。
2.下列语句中,加点词语使用不.正.确.的一项是A.国家质检总局制定的《家用汽车产品修理、更换、退货责任》即日起开始施.行.,值得注意的是,该规定首次提出保修期不低于三年。
B.东方白鹳是一种体优美的大型涉禽,其羽毛亮如白雪,腿脚鲜红艳丽,覆羽和飞羽黑中的闪亮。
白、红、黑结合得如此高.妙.,令人惊叹。
C.这些年来,随着人们接触的新事物越来越多,观念越来越开放,再加上经济水平的不断提高,中国人的自驾游活动搞得风.生.水.起.。
D.重庆商品展示交易会今日在国博中心开幕,农产品展区众多商户在现场批发促销,副食品展区买一送一等优惠活动也比.比.皆.是.。
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四川大学期末考试试题(A卷,闭卷)
(2009 ——2010学年第1学期)
课程号:50401730 课序号:2,1,0 课程名称:卫生统计学Ⅳ
任课教师:张菊英、殷菲、蒋敏成绩:
适用专业年级:07护理、06口七、06基法
学生人数:145 印题份数:160 学号:姓名:
考试须知
四川大学学生参加由学校组织或由学校承办的各级各类考试,必须严格执行《四川大学考试工作管理办法》和《四川大学考场规则》。
有考试违纪作弊行为的,一律按照《四川大学学生考试违纪作弊处罚条例》进行处理。
四川大学各级各类考试的监考人员,必须严格执行《四川大学考试工作管理办法》、《四川大学考场规则》和《四川大学监考人员职责》。
有违反学校有关规定的,严格按照《四川大学教学事故认定及处理办法》进行处理。
一、简答题(10小题,每题6分,共60分)
1.标准差是描述变异程度的指标,在比较新生儿身长与体重的变异程度时,标准差大者变异程度大,该
说法正确吗?简述理由。
不正确,因为它们采用的是不同的计量单位指标,不能直接用标准差比较其离散程度,应该使用变异系数。
2. 测定225例下颌前突患者接受下颌升支矢状截骨术后6个月的平均颌力为15.02,标准差为4.61。
试估计其95%的置信区间。
3. 某地HIV经性传播比例明显增加,由2005年的0.03%上升到12.35%,表明该地HIV经性传播的强度增加,应该加强性传播途径的干预工作。
你认为这种说法正确吗?为什么?
不对,构成比代替率
4. 对同一资料,又出于同一研究目的,用参数统计和非参数统计所得结果不一致时,应以何种结果为准?
以资料满足的条件为准若资料满足参数检验的条件,应该以参数检验的结果为准,此时非参数检验的检验效能低于参数检验。
若资料不服从正态分布,或者分布情况未知,不能用参数法进行推断,宜采用非参数法对总体的分布位置进行假设检验
5. 经调查得甲、乙两城市男性的肺癌粗死亡率都为3
6.0/万,按年龄构成标化后,甲城市男性肺癌标化死亡率为31.5/万,乙城市为48.0/万,请解释此差异的原因。
两市男性肺癌的病性构成构成不同……
6. 试以区组设计方差分析为例,说明方差分析的基本思想。
方差分析的基本思想是把全部观察值间的基本变异按照设计类型的不同,分解成两个或多个组成部分,然后将各部分的变异与随机误差进行比较,以判断各部分的变异是否具有统计学意义。
在随机区组涉及方差分析中,将首饰对象按照性质相同或相近组成b 个区组(又称配伍组),再将每个区组中的受试对象跟别随机分到k 个处理组中去,然后将总比变异分为区组变异、处理变异、误差变异,最后进行比较、
7.有肺功能检查及支气管激发试验,各组间肺功能及支气管激发试验阳性率的比较比较结果如表1,三组
间比较均有统计学意义。
表1 各组间肺功能及支气管激发试验阳性率的比较
肺功能的比较
组别例数
FEVI (),%s x ± 值
t 鼻炎组5483.90 4.87*± 5.12鼻炎哮喘组3678.827.41▲± 5.28健康对照组
20
90.25 4.69△
± 3.18
注:*鼻炎组与对照组比较();▲鼻炎哮喘组与对照组比较();△鼻炎组与鼻炎哮05.0<P 05.0<P 喘组比较()
05.0<P 试述该分析是否可靠?并说明理由。
不可靠,不应该用两两之间的t 检验,应该用完全随机的方差分析,然后再用多个样本均数的两两比
较。
8.某医生以20岁男青年前臂长(cm)估计身高(cm),建立的直线回归方程为,请写出该ˆ41.63 2.88y
x =+方程的回归系数,并解释其统计学意义。
9. 某研究探讨体身高与体重的关系,得到r =0.67,同时算得b =-1.8,该分析结果是否正确?为什么?10. 简述实验设计的基本原则。
二、计算分析题(3小题,共30分)
1. 12名接种卡介苗的儿童,采用两批不同的结核菌素,一批是标准结核菌素,一批是新制结核菌素,分
别注射在儿童的左右前臂,以皮肤浸润直径(mm)为指标,数据如表2。
表2 标准品和新制品皮肤浸润直径比较
编号123456789101112标准品12.014.515.513.012.010.29.015.013.014.014.011.0新制品
10.0
10.0
12.5
10.0
7.5
8.5
7.2
8.0
9.5
8.7
10.0
8.5
试问:(1)该资料属于哪种类型?何种设计类型?(4分)
(2)标准品和新制品皮肤浸润直径是否不同?请写出基本步骤,不必计算。
(6分)
2. 对107例胃炎患者随机分为两组,分别用中药和西药治疗,其中中药组58例,有效37例,西药组49例,有效43例。