综合练习.DOC
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【最新整理,下载后即可编辑】第16课他正在等他爱人呢一、看注音写汉字:Jiǎn jià gù kè pái duì gāng cái zhāo pìnYìng pìn dǎsuàn wài biān liáo tiānr kě néngLǚxíng huí dá hēi bǎn yīn yuè yóu piào二、请用以下词语造句子:1、正在…… 呢2、有的……有的……3、一边……一边……4、刚才5、可能三、看图说句子1234第17课刚才你去哪儿了一、看注音写汉字:Guàng jiē yì dǐng mào zǐ fēng jǐng tè biéYìzhī kǎo yā chōu shí jiān yǐ jīng yǐ qiánXǐ yī fu yì zhī huā xǐ zǎo二、完成会话:A: 你昨天买什么了?A: 莉莉买花了没有?B: 。
B: 。
A: 你买了多少?A: ?B: 。
B: 她只买了一枝。
三、用“……了……就……”格式完成句子1、我到了上海。
2、我吃了饭。
3、就上课。
4、就给他打电话。
5、我到了家。
6、直美买了东西。
四、看图说话:第18课秋天了一、看注音写汉字:Shù yè tiān qì shuì lǎn jiào kàn shàng qùQīn qi nuǎn huo guā fēng dǎo yóu kǎo shìJié hūn fēn zhōng yòu ér yuán guān mén二、用“要……了”、“就要……了”、“快要……了”改写句子:例:我们下周去美国。
1.甲股份有限公司(以下简称甲公司)20×7年至20×9年对丙股份有限公司(以下简称丙公司)投资业务的有关资料如下:(1)20×7年4月1日,甲公司以银行存款2000万元购入丙公司股份,另支付相关税费10万元。
甲公司持有的股份占丙公司有表决权股份的20%,对丙公司的财务和经营决策具有重大影响,并准备长期持有该股份。
甲公司取得该项投资时,被投资方固定资产的账面原价为1000万元,预计折旧年限为10年,预计净残值为0,采用直线法计提折旧,已使用4年,公允价值为900万元。
20×7年3月1日,丙公司可辨认净资产的公允价值为9500万元。
(2)20×7年4月20日,丙公司宣告分派20×6年度的现金股利100万元。
(3)20×7年5月10 日,甲公司收到丙公司分派的20×6年度现金股利。
(4)20×7年11月1日,丙公司因合营企业资本公积增加而调整增加资本公积150万元。
(5)20×7年度,丙公司实现净利润400万元(其中1~3月份净利润为100万元)。
(6)20×8年4月2日,丙公司召开股东大会,审议董事会于20×8年3月1日提出的20×7年度利润分配方案。
审议通过的利润分配方案为: 按净利润的10% 提取法定盈余公积;按净利润的5%提取任意盈余公积金;分配现金股利120万元。
该利润分配方案于当日对外公布。
(7)20×8年,丙公司发生净亏损600万元。
(8)20×8年12月31日,由于丙公司当年发生亏损,甲公司对丙公司投资的预计可收回金额为1850万元。
(9)20×9年3月20日甲公司出售对丙公司的全部投资,收到出售价款1930万元,已存入银行。
要求:编制甲公司对丙公司长期股权投资的会计分录。
(“长期股权投资”和“资本公积”科目要求写出明细科目;答案中的金额单位用万元表示)2.甲公司和A公司是两个没有关联方关系的独立公司。
液压传动综合练习题综合练习题一、填空题1、液压系统是由动力元件、执行元件、控制元件、辅助元件和工作介质五个局部组成。
2、液压系统中的液压损失分为两类,即沿程压力损失和局部压力损失,而沿程压力损失是由于液体流动时的内摩擦力引起的。
3、液压泵按其排量是否可调节分为定量泵与变量泵两类。
4、轴向柱塞泵分为斜盘式和斜轴式两种,要改变轴向柱塞泵的输出流量,只要改变斜盘的倾角。
5、液压缸按其结构特点可分为活塞缸、拄塞缸、摆动缸三大类。
6、方向控制阀主要有单向阀和换向阀两种,它是利用阀芯和阀体相对位置的改变,实现油路的接通和断开。
7、流量控制阀均以节流量单元为根底,利用改变阀口流量面积或通道长度来改变液阻,以到达调节流量的目的。
8、调速阀是采用定差液压阀和节流阀串联组合而成的。
9、常用的液压根本回路有方向控制回路、压力控制回路、速度控制回路等。
10、压力限定回路用限压式变量泵来保持回路压力恒变,最大工作压力由泵来调节。
11、调速回路的形式有节流调速、变量调速和容积节流调速。
15、速度控制回路的功用在于调节或变换执行元件的工作速度。
16、液体黏性的大小用黏度来衡量,影响它的因素有温度和压力。
17、在液压系统中,液压泵将电动机输入的机械能转变为液压能。
18、外啮合齿轮泵的漏油、困油和径向液压力不平衡是影响齿轮泵性能指标和寿命的三大问题。
19、一般情况下,低压系统或辅助系统装置选用低压齿轮泵,中压系统多采用叶片泵,高压系统多项选择用柱塞泵。
(选填叶片泵、柱塞泵、齿轮泵)20、液压缸通常有缸体组件、活塞组件、密封装置、排气装置和缓冲装置组成。
21、压力控制阀的共同特点是利用作用在阀芯上的液压力和弹簧力相平衡的原理进行工作。
其中溢流阀根据结构和工作原理分为直动式和先导式溢流阀两种。
22、液压系统中的辅助元件有油箱、滤油器、蓄能器、管件等。
23、各液压阀间的连接方式有:简式、板式连接、集成式等。
24、压力控制回路可以实现调压、稳压、减压、增压、卸荷等功能。
3.The WTO( = World Trade Organization 世界贸易组织)is intended totrade among its members states.4.All we were told before leaving the office was that the committee would consider ourapplications.5.My boy friend bought me dinner to being late the day before.6.Sophia doesn't seem to use any sort of logical for keeping her accounts.7.I'm glad Ruth got the first prize in the speech contest ------------------------- she richly________________ it.8.If you try to cheat in the examination, you will never it.9.At the age when most people, he is ready to start a new career.10.If the French team wins, it will for a place in the finals.四. Complete the following , using the words or phrases in brackets. Make additions or changeswhere necessary , then translate into Chinese :1.The principaFs daughter didn't receive special her teachers. Shewas her excellent performance. When she graduated from highschool in 1998, she had straight A's and offers from some of themost famous university in the country, ( treatment, reward, scholarship )2.You are be offered a or a reduction on thingsyou buy at the supermarkets on weekends. ( liable, discount, local )3.The principal (校长 ) is disappointed withof the children. From what she has gathered, some of the teaching staff their pupils. She has just announced that strictwork regulations have been made and that both Chinese专业 班级 姓学号. Translate the following wordsand phrases into Chinese: 1. attend 2. occasion 3. neglect 4. tradition 5. foster 6. reserve 7.steer 8. loyalty 9. qualify lO.deserve 11 .budget 12.convention13.rejec 14. significance petent 16. tradition 17.utili 18. favorab 1. find one's way 2. on one's 3. pick 4.open 5. on the run 6.文化7.致力于,8.大量9.绝不,三河北工业大学继续教育学院2010学年第二学期《英语专本科综合练习题》19. symptom 20.furthermore Translate the following phrases into Chinese:10.遭遇,遇到 Fill in the gaps with words or phrases chosen from the box. Change the form where necessary :attach cultivate deserve exception initial phenomenonget away with in due course in retrospectmake up for on occasion steer clear of1. Professor Smith translated not only from the French but also,.from the Polish.2. A full understanding of mathematics is sufficient to explain a wide variety of naturalA) do you B) will you C) can you D) could you2. I learned to a bicycle when I was a small boyA) drive B) run C) operate D) ride3. The library needs, but it'll have to wait until Sunday.A) cleaning B) be cleaned C) clean D) being cleanedpromote qualify remote reserve retire system4.He suggested that the thief put into prison.A) is B) was C) be D) being5.Experienced drivers have accidents than beginners.A) least B) few C) little D)fewerst night a fire in that market, so the firm suffered a heavy loss.A) broke up B) broke offC) broke down D) broke out7..The mother was delighted to hear the child that.A) to say B)said C) to have said D)say8.It was not just the size of the party last night made it unique, but __________ it meant to our company.A) that; that B) that; what C) what; that D) what; what9.He heard a big noise and had to to the roadside to have a look.A) pull up B) pull out C) pull over D) pull on10.I am seeing him.A) looking forward to B) expecting C) wanting D) waiting11.She thought I was talking about her daughter, ____ , in fact, I was talking about my daughter.A) whom B) which C) while D) when12.Can you believe that in ___ a rich country there are many poor people?A) so; so B) such; so C) such; such D) so; such13.I won't go to Japan next week..A) He won't neither. B) Neither will he. C) Neither he will D) Neither won't he.14.It is high time that you the problem carefully about how to improve your study grades.A) study B) must study C) studied D) have studied15.You can't see the president you've made an appointment with him.A) if B) except Owhen D) unless16.He was caught in the rain yesterday,, he fell ill this morning.A) in contrast B) on the contraryC) as a result D) in other words17.your advice yesterday, I would have missed the finest part of the lecture.A) If I didn't take B) Had I not takenand overseas teachers. ( apply, somewhat, neglect, performance )五. Translate the following passage into Chinese:1.However, I do not want to overstate (过分夸大)my case. There is enormous creativityto be found in Chinese scientific, technological and artistic innovations (新生事物)past and present. And there is a danger of exaggerating (夸大,夸张)creativebreakthroughs in the West. When any innovation is examined closely, its reliance onprevious achievement is all too apparent ( the "'standing on the shoulders of giants "phenomenon ).But assuming that the contrast I have developed is valid (有I艮据的),and that the fostering of skills and creativity are both worthwhile goals, the important question becomes this : Can we gather from the Chinese and American extremes, a superior way to approach education, perhaps striking (找至U )a better balance between the poles of creativity and basic skills?2.“He may be the rich est by Forbes rankings (福布斯排行榜),"says corporateaffairs director Jim Vbn Gremp, "but he doesn't know whether he is or not ---------- and he doesn't care. He doesn't spend much. He owns stock, but he's always left it in the company so it could grow.But the real story in his mind is the success achieved by the 100,000 people who make up the Wal-Mart team.,,He 's usually back home for Friday sales meeting, or the executive pep rally (鼓劲集会)Saturday morning at 7 a.m., when Walton, as he does at new store openings ,is liable to jump up on a chair and lead everyone in the Wal-Mart cheer: "Give me a W!Give me an A ! Give me an L ! Louder!"7\.Choose the best answer.1.Don't smoke in the meeting-room, ___ ?C) If I haven't taken C) Provided I didn't take18.Only when I began to do it that I had made a mistake.A) I realize B) I had realized C) did I realize D) would I realize19.He live in the remote rural areas than in the big bustling cities.A) prefers to B) would rather C) likes to D) had better20.An old friend from abroad,I was expecting to stay with, telephoned me.A) that B)whom C) who D.)which21.My new shoes cost me $20. The price was that of the last pair I bought a year ago.A)more than twice B) as much as twiceC) as twice D) twice as much as22.Judges must be independent political pressure.A) to B) of C) under D) on23., he would feel exhausted after a whole day's work.A) As strong is he B) As he is strongC) Strong if he is D) Strong as he is24..The old woman was her wallet.A) stolen from B) robbed ofC) stolen of D) robbed from25.I read an interesting in a newspaper about farming today.A) article B) advertisement C) description D) exploration26.Shortly after we, a waiter came over to our table with a smile.A) seated B) were seated C) sat ourselves D) took places27.He was last seen in public on the of his daughter's wedding.A) event B) occasion C) chance D) view28.The school committee naturally hope that their choice of the play will be with the school and parents.A) popular B) fortunate C) favorite D) pleased29.I not only spoke English very clearly ____ v ery fluently as well.A) and B) or C) but D) than30.The painting was a valuable family possession, which had been from generation to generation.A) handed over B) handed down C) handed out D) handed off31.Their friendship deepened with the ______ o f time.A) procession B) evaporation C) elimination D) passage32.It's raining outside. Please wipe your shoes on the carpet in the hall before coming in.A) lay B) laid C) lied D) lain33.open the door for you ?A) Will I B) Shall I C) Would you like that D) Do you want that34 If I work in a small factory, it is not for me to gain much experience.A weeklyB friendlyC likelyD lively35.Judging from his accent, I can that he is from the south.A speakB tellC seeD show36.She has her mind and is going to Canada instead of Japan.A changedB exchangedC decidedD made37.He several jackets and finally picked out a blue one.A. went on B took on C got on D tried on38.When I came through the customs at the airport, I had to pay on the wine I had bought.A taxes B) duty C rates D allowance39.Skillful farming them to support a a large population.A commandedB demandedC enabledD required40.The workers went on strike against the government's plan the prices of daily necessities.A. on B at C for D with七.Decide the underlined parts in the following sentences are True or False .1.I was wondering if to go upstairs or to go to library. ( )2.Hardly had he entered the office when he realized that he had forgotten his wallet.()3.Some of the milk turned sour and had to throw away.( )4.On those days they were not able to afford woolen clothings. ( )5.Just between you and me , this is not a very good example of American folk music.()6.What type of automobile would you buy if you are free to choose among all the cars available today?( )7.The number of the participants is much fewer than expected.( )8.Plastic bags are useful for holding many kinds of food, because virtue of their clearness, toughness, and low cost.( )9.Mary's advisor persuaded him to take several courses which did not involve much knowledge of mathematics.( )10.He has spent years to work on the design and yet he has no idea whether it could be a success.( )11.The doctor insisted that his patient take it easy for four months/ )12.If England had won the Revolutionary War, the whole history of theEnglish-speaking world had been different.()paring with the place where I grew up, this town is more prosperous.( )14.Not until he hcd finished his homework did he begin to watch TV.( )15.Universities are institutions that teach a wide variety of subjects at advanced levels.()。
等差数列等比数列综合练习题一.选择题1. 已知 a n 1 a n 3 0 ,则数列 a n 是 ( ) A. 递增数列B.递减数列C.常数列D.摆动数列2. 等比数列 { a n } 中,首项 a 1 8 ,公比 q 1,那么它的前 5 项的和 S 5 的值是( )A . 31. 33 2 . 35 . 37 C22223. 设 S n 是等差数列 { a n } 的前 n 项和,若 S 7=35,则 a 4=( )A. 8B.7C.6D.54. 等差数列 { a n } 中, a 1 3a 8 a15120,则 2a 9a10()A .24B .22C .20D .-85. 数列 a n 的通项公式为 a n 3n 228n ,则数列 a n 各项中最小项是 ( )A. 第 4 项B.第 5 项C.第 6 项 D. 第 7 项6. 已知 a , b , c , d 是公比为 2 的等比数列,则 2a b等于( )2cdA .1B . 1. 1 . 12C 4D 87.在等比数列 a n 中, a 7 ? a 11 6, a 4 a 14 5, 则a 20()a 10A. 2B.3C. 2 或3 D.2 或3323 2328.已知等比数列 a n 中, a n >0, a 2a 4 2a 3a 5 a 4 a 6 25 ,那么 a 3 a 5 =( )A.5B .10C.15D .209.各项不为零的等差数列a n 中 ,有 2a 3 a 722a 110 ,数列 b n 是等比数列 ,且b7 a7 , 则 b6b8( )A.2B. 4C.8 D .1610.已知等差数列a n中,a n 0, 若 m 1且 a m 1 a m1 a m2 0, S2 m 1 38, 则m等于A. 38B. 20C.10D. 911.已知s n是等差数列a n(n N * ) 的前n项和,且 s6 s7 s5,下列结论中不正确的是 ( )A. d<0B. s11 0C. s12 0D. s13 012.等差数列{ a n}中,a1,a2 , a4恰好成等比数列,则a4 的值是()a1A .1 B.2 C.3 D.4二.填空题13.已知 { a n} 为等差数列, a15=8,a60=20,则 a75=________14. 在等比数列{ a n}中,a2?a816 ,则 a5=__________15.在等差数列 { a n} 中,若 a7=m,a14=n,则 a21=__________16. 若数列x n满足lg x n 1 1 lg x n n N,且x1x2L x100100 ,则lg x101x102L x200________17.等差数列 {a n} 的前 n 项和为 S n,若 a3+a17=10,则 S19的值_________18.已知等比数列 {a n} 中, a1+a2+a3=40,a4+a5+a6=20,则前 9 项之和等于_________三.解答题19.设三个数 a ,b, c 成等差数列,其和为6,又 a ,b,c 1成等比数列,求此三个数 .20. 已知数列a n中,a11,a n2a n 13,求此数列的通项公式.21. 设等差数列an的前n项和公式是sn5n23n ,求它的前3项,并求它的通项公式 .22. 已知等比数列a n的前n项和记为S n,,S10=10,S30=70,求S40。
[考研类试卷]综合练习试卷1一、填空题请完成下列各题,在各题的空处填入恰当的答案。
1 矢量场函数A的旋度▽×A在闭合的S上的面积分∮s(▽×A)×dS=______。
二、简答题2 写出理想电介质(μ=μ0,ε=ε0C,σ=0)中瞬时麦克斯韦方程组的微分限定形式(即用E和H表示),并简要标明每个方程的物理意义。
3 导致静电场是保守场的根本原因是什么?4 写出自由空间中正弦电磁场的麦克斯韦方程组的积分表达式。
三、计算题5 如下图所示,设半径为a的圆形平板电容器,板间距离为d,并填充电导率为σ的均匀导电介质(ε,μ),两极板问外加直流电压U,忽略边缘效应。
(1)计算两极板间电场、磁场以及能流密度矢量(坡印亭矢量)。
(2)计算电容器内储存的能量。
(3)试证明:其中消耗的功率刚好是由电容器外侧进入的功率。
67 已知介电常数为ε的无限大均匀介质中存在均匀电场分布E,介质中有一个底面垂直于电场、半径为a、高度为d的圆柱形空腔,如图所示。
分别求出当a》d和a 《d时,空间的电场强度E、电位移矢量D和极化电荷分布(边缘效应可忽略不计)。
8 如下图所示,求三块相互连接并接地的导体平面及左端具有恒定电位U0的导体平面(与上下两块导体板问有微小缝隙)所包围的区域内的电位分布(令每块导体平面沿z方向均为无限长)。
9 在球坐标系中,已知真空中电位分布为:试求:电荷分布。
式中a,e0均为常数。
10 一半径为a的薄导体球壳在其内表面涂覆了一薄的绝缘膜。
球内充电量为Q的电荷,球壳上又另充电量Q。
已知内部的电场为E=e r(r/a)4。
设球内外介电常数ε=ε0。
试求: (1)球内的电荷分布。
(2)球外表面的电荷分布。
(3)球壳的电位。
(4)球心的电位。
11 同轴线的内导体半径为a,外导体内半径为b,内外导体间填充的非均匀介质ε0是半径r的函数。
设外导体接地,内导体的电位为U。
(1)如果要使内外导体间的电场强度E与r无关,则介质的相对介电常数εr应与r成何关系? (2)求介质中的电场强度E及极化强度P。
综合练习题一一.用系统命名法命名下列化合物。
1. 2.3. 4.5. 6.7. 8.9. 10.11.12.13. 14.CH 3CH 2CH CH(CH 3)2CH 2CCH 2CH 3CH 3CH 3CH 3CH 2CC C C CH 3HCH 2CH 3CH 3Cl ClClCH 2Cl SO 3HOH C 32CHOCH 3CH 2O C O O CH 23CH 3ONO 2ONHCH(CH 3)2[HOCH 2CH 2N(CH 3)3]+OH -CH 3CHCH 2CHCH32H 53二.写出下列化合物的结构式或Fischer投影式。
1.2,2-二甲基-3,3-二乙基戊烷2.反-1-甲基-4-叔丁基环己烷(优势构象式)3.环戊二烯负离子4.间二乙烯苯5.对异丁基苄溴6.苯甲醚7.顺-1,3-环己二醇(非优势构象式)8.4,4’-二羟基二苯甲酮9.(2R,3S)-2,3-二羟基丁酸10.R-半胱氨酸11.嘌呤12.柠檬酸三.单选题。
1.下面哪个化合物不属于异戊烷光化氯代产物。
()A.异戊基氯B.2-甲-1-氯丁烷C.2-甲-2-氯丁烷D.1-氯戊烷2.1-甲基环己烯与溴化氢发生加成反应的主产物是:()A.溴甲基环己烷B.1-甲-1-溴环己烷C.1-甲-2-溴环己烷D.1-甲-3-溴环己烷3.分子式为C6H12的同分异构体中,能与溴化氢加成生成2-溴-4-甲戊烷的环烷烃是:()A.环己烷B.甲基环戊烷C.1,2-二甲基环丁烷D.1,3-二甲基环丁烷4.(1)正丁醇,(2)异丙醇,(3)叔丁醇,(4)甲醇分别与氢卤酸发生S N1反应的速度由快至慢的顺序为:()A.(1)>(2)>(3)>(4)B.(4)>(3)>(2)>(1)C.(3)>(2)>(1)>(4)D.(3)>(1)>(2)>(4)5.下列化合物中无芳香性的是:()A.环戊二烯B.环戊二烯负离子C.环丙烯正离子D.菲6.甲苯与硝酸反应最不可能得到的产物是:()A.邻硝基甲苯B.对硝基甲苯C.邻硝基苯甲酸D.间硝基甲苯7.(1)氯环己烷,(2)1-甲-1-氯环己烷,(3)1-氯甲基环己烷发生S N2反应速度由快到慢的顺序为:()A.(1)>(2)>(3)B.(3)>(1)>(2)C.(3)>(2)>(1)D.(2)>(1)>(3)8.内消旋酒石酸的构型为:()A.(R,S)B.(R,R)C.(S,S)D.(D,L)9.乙二醇与酸性高锰酸钾溶液反应的最终产物是:()A.羟基乙醛B.乙二醛C.乙二酸D.水和二氧化碳10.下列化合物中不能与氢氰酸加成的是:()A.正壬醛B.丁酮C.苯乙酮D.环己酮11.下列化合物中能和Tollens试剂反应的是:()A.乳酸B.草酸C.醋酸D.酒石酸12.下列化合物中,烯醇式最稳定的是:A.丙酮B.乙酰丙酮C.乙酰乙酸乙酯D.β-丁酮酸四.是非题:1.离域键不是共价键。
(完整版)四年级语文综合练习(二)及答案.docx四年级语文综合练习(二)班姓名学号我自己同学我老我家我一、,小合作完成。
1.一你最感趣的新向小成宣,再一得最清楚、最有条理。
2.在革命争年代涌了很多可歌可泣的小英雄。
将你了解到的故事小成听,再推荐你得秀的同学在全班交流。
小同学我得()星。
(最多五星)二、真听句子,把句子写在横上,注意写字的速度。
________________________________三、拼音,写。
yòu gu ī chǔn shì yúguànér chū héng qīshùbā() () () ()shāo hu ǐ níng gù jù jīng huì shén duàn duàn xù xù() () ()()四、把充完整,并一个四字造句。
响()云()()()人()不可()气喘()()不()不()知()知()百()百()断断()()。
五、搭配。
深情地()一()盔呼吁()机灵地()一()争()六、填空。
然??但是??如果??就??不但??而且??1.机夜能安全行,()因它路,()因它装有雷达。
2.()不是我,些海()不会受到那的害。
3.()生命短,(),我却可以有限的生命体出无限的价。
1.爸爸倒在了()世界和平的圣坛上。
2.全世界人民要携起手来,()我们的地球。
3.我们要学会关心父母,()家人。
七、用正确的修改符号修改病句。
1.他的意见基本是完全正确的。
2.听到这个好消息,高兴得跳了起来。
八、连连看。
蚂蚁搬家蛇过道晚霞行千里天上鱼鳞斑秋雾阴,冬雾雪春雾风,夏雾晴晒谷不用翻朝霞不出门明日必有大雨到九、阅读下面的短文,完成练习。
动物的远游①许多动物有一种(超越超脱)人类的本领,它们能够分辨方向,即使到遥远的地方,也可以认路回家。
综合练习题(第5章)一、填空题1.在一次假设检验中,当显著性水平01.0=α时拒绝原假设,则用显著性水平05.0=α时________。
2.某一贫困地区所估计的营养不良人数高达20%,然而有人认为实际上比这个比例还要高,要检验该说法是否正确,则原假设与备择假设是 。
3.在假设检验中,第二类错误是指 。
4.在假设检验中,第一类错误是指 。
5.在假设检验中,第二类错误被称为____。
6.某厂生产的化纤纤度服从正态分布,纤维的纤度的标准均值为1.40。
某天测得25根纤维的纤度的均值 1.39x =,要检验与原来的标准均值相比是否有所变化,其原假设与备择假设是 。
7.当原假设正确而被拒绝时,所犯的错误为第__________错误;只有在接受原假设时,我们可能犯第__________错误。
8.在假设检验中,等号“=”总是放在 上。
9.在假设检验中,首先需要提出两种假设,即 和 。
二、单项选择题1.假设总体方差已知,显著性水平为α,对于假设检验H 0:μ≥μ0,H 1:μ<μ0,当( )时,拒绝原假设。
A .|Z|>Z α/2B .Z<-Z αC .t<-t α(n-1)D .t>t α(n-1)2.若假设形式为H 0:μ≥μ0,H :μ<μ0,当随机抽取一个样本时,其均值大于μ0,则( )。
A 、肯定接受原假设,但有可能犯第一类错误。
B 、有可能接受原假设,但有可能犯第一类错误。
C 、肯定接受原假设,但有可能犯第二类错误。
D 、有可能接受原假设,但有可能犯第二类错误。
3.在一次假设检验中,当显著性水平α=0.01原假设被拒绝时,则用α=0.05时( )A. 一定不会被拒绝B. 一定会被拒绝C. 需要重新检验D. 有可能拒绝原假设4.在假设检验中,如果所计算出的P 值越小,则说明( )A. 不利于原假设的证据越强B. 不利于原假设的证据越弱C. 不利于备择假设的证据越强D. 不利于备择假设的证据越弱5.设总体X 服从正态分布N (μ,1),欲检验假设H 0∶μ=μ0,H 1∶μ≠μ0,则检验用的统计量是( )A 、B 0)x μ-CD 0)x μ-6.在均值的假设检验中,如果是右侧检验,计算出来的P 值为为0.052,在05.0=α的情况下,则( )A. 接受原假设B.接受备择假设0μμ> C 接受备择假设0μμ< D 不确定7.拒绝域的大小与我们事先选定的( )A.统计量有一定关系B.临界值有一定关系C.统计分布有一定关系D.显著性水平有一定关系8.对于给定的显著性水平α,拒绝原假设的条件是( )A.α=PB.α<PC.α>PD.0==αP9.若一项假设规定显著性水平为05.0=α,下列的表述正确的是:A.拒绝0H 的概率为5%B.不拒绝0H 的概率为5%C. 0H 为假时不被拒绝的概率为5%D. 0H 为真时被拒绝的概率为5%10.在假设检验中,原假设和备择假设:A.都有可能成立B.都有可能不成立C.只有一个成立而且必有一个成立D.原假设一定成立,备择假设不一定成立11.研究者想收集证据予以支持的假设通常称为:A.原假设B.备择假设C.合理假设D.正常假设12.在大样本情况下,检验总体均值所使用的统计量是: A. n x z σμ0-= B.n x z 20σμ-=C.n s x t 0μ-= D.n s x z 0μ-=三、名词解释或简答题1.假设检验中的第一类错误和第二类错误分别是指什么?它们发生的概率大小之间存在怎样的关系?2.参数估计与假设检验的关系3.假设检验四、计算题1.某种产品的直径为6cm 时,产品为合格,现随机抽取100件作为样本进行检查,得知样本平均值为6.1cm ,现假设标准差为0.2cm ,令α=0.05,检验这批产品是否合格。
综合练习
一、口算下面各题。
4.5+
5.5=
6.2-2= 0.625+0.375=
4.1-1.9= 0.28+0.02= 0.34+0.6=
1-0.77= 8+4.6= 1.3-0.7=
4.13-2.8= 0.56-0.43= 0.57+0.9=
4.7-4= 0.6+7.45= 2.31+0.9=
二、填空。
1.根据小数减法的意义,写出下面两个减法的差。
4.95+6.7=11.65
11.65-4.95=()11.65-6.7=()
2.用小数计算下面各题。
(1)7元8角4分+1元零5分=()+()=()
(2)6平方千米-3平方千米520公顷=()-()=()(3)4千米600米+2千米50米=()+()=()
(4)9千克-3千克700克=()-()=()
3.在下面的□里填上适当的数,在○里填上适当的运算符号。
(1)7.9+5.6+
4.6=7.9+(□○□)
(2)(1.38+1.75)+0.25=□○(□○□)
(3)18.76-(3.76+0.53)=18.76-□○□
(4)32.17-0.46-4.54=32.17-(□○□)
三、用竖式计算下面各题。
(1)30-3.029 (2)21.476+0.56
(3)13.79+9.653+170.57 (4)4.2-0.05-0.186
四、用简便方法计算下面各题。
(1)1.26+3.7+0.74 (2)5.6-0.72-0.28
(3)0.25+0.85+0.75+0.15 (4)4.8+0.2-4.8+0.2
五、求未知数x。
(1)x+12.67=40.6 (2)x-28.7=28.7
(3)40-x=17.84 (4)24.8+x=40.75
六、计算下面各题。
(1)170.79+9.653-13.57
(2)6.4-1.07+0.47-0.65
(3)85.07-(2.01+2.29)+0.48
(4)30-(2.5-1.75+0.86)
七、列式计算下面各题。
(1)4.26与11.8的和是多少?
(2)从50中减去30.69,差是多少?
(3)0.84比0.9少多少?
(4)甲数是30.5,比乙数少2.65,求乙数。
八、应用题。
1.三年级收集废钢铁15.7千克,四年级比三年级多收集4.32千克。
两个年级共收集废钢铁多少千克?
2.测量水池蓄水的深度,把6米长的竹竿插入水中,露出水面1.42米,入泥部分0.3米,水池蓄水的深度是多少米?
3.工程队用三个月挖一条10.5千米长的水渠,第一个月挖了2.65千米,第二个月比第一个月多挖了0.74千米,第三个月挖了多少千米?。