复习题_问答题部分New (2)讲解
七年级(上)思想品德复习题精选(问答题部分)
七年级(上)思想品德复习题精选(问答题部分)第一单元走进中学1、初中生怎样设计自己成长的新方案?答:1)学会学习2)养成良好的道德品质3)关注自我心理健康4)勇于创新,勤于实践:①多动脑②勤动手2、国家提倡的五爱是什么?《公民道德建设实施纲要》中规定的我国公民的基本道德规范是什么?(P6页)3、你对“中学时期是人生发展的‘黄金时期’这句话如何理解?(P4页第一段)4、为什么中学生要把“学会学习”作为自己的双重任务?答:中学时期几年时间既不可能学会和掌握现有的各种知识和技能,更不可能学到将来才出现的知识。
当今社会,知识更新的速度越来越快,现有的知识不一定能用于将来的实际需要,只有掌握学习方法的“会学习”的人才不会被时代所淘汰。
因此,中学生不仅要学习现成的知识和技能,更重要的是要学会学习。
5、为什么中学生要关注自我心理健康?(P7页最后一段)6、我们为什么要学会认识自我?(P11页第一段)7、我们应当怎样对自己进行评价?(P11页第二段+第三段1、2、3行)8、有时候我们的自我认识会走入误区,主要原因是什么?(P12页第3、4行)9、为什么一个人不能完全受别人对自己的评价的支配?答:虽然他人评价比自我评价更客观、更全面,但是,如果一个人完全受别人对自己的评价的支配,就会失去自我,使自己的行为处处受别人评价的控制。
10、为什么一个人在积极展现自我的同时,还要不断进行自我超越?(P14页第二段)11、一个人怎样才能走出旧我,走向新我呢?(P14页最后一段)12、中学生情绪具有什么特点?答:中学生的内心存在不少矛盾,如渴望独立又离不开对父母的依赖,渴望与人沟通又不愿敞开自我,渴望积极上进却又意志薄弱。
因此,中学生的情绪大都丰富而热烈,起伏变化也较大,很不稳定。
13、积极情绪与消极情绪对人的身体健康、智力发展、学习效率等产生作用有何不同?答:积极情绪与消极情绪对人的身体健康、智力发展、学习效率有着完全不同的作用。
图书馆服务知识与技能竞赛复习题库(问答题)
六、问答题1.请谈谈1906-1911年公共图书馆运动的主要内容。
2.京师图书馆的创办是晚清预备立宪时期公共图书馆运动,乃至我国近代图书馆史中的一个重大历史事件。
请谈谈京师图书馆思想的主要内容有哪些。
3.《七略》是我国第一部综合性的系统反映国家藏书的分类目录,又是我国最早的一部图书分类法,成书于公元前6年,根据当时的国家藏书编制而成,其作者是刘歆。
请谈谈《七略》的基本类目有哪些?4.简述图书馆产生的背景5.图书馆具有哪些社会职能6.在许多国家中,占主导地位的资源共享业务包括哪几个方面7.图书馆管理的意义8.谈谈国内外关于图书馆学研究对象的认识9.简述影响图书馆发展的因素10.我国实行图书馆资源共享的障碍11.简述“藏书思想”与“图书馆学术”的区别。
12.简述晚清西方图书馆观念与学术思想在中国的传播途径。
13.简述郑观应的藏书楼思想14.试述梁启超“开架服务”思想在今天的现实意义。
15.简述《京师图书馆及各省图书馆通行章程》中对图书馆建筑的要求16.简述《学部奏筹建京师图书馆折》中体现的京师图书馆思想17.《古越藏书楼章程》中公共图书馆思想的思想主要体现在哪些方面18.刘光汉认为“书藏于上”存在着哪些弊端?19.晚清时期的公共图书馆思想主要包括在哪些方面?20.简述清末封疆大吏奏设公共图书馆的意义。
21.图书馆数字参考咨询服务工作的流程由哪几个环节?22.与数字参考咨询服务其他模式相比较,博客具有哪些优势及特点?23.在我国,划分图书馆类型通常采用什么标准?24.文献整理工作的步骤。
25.现代图书馆管理的基本要求。
26.现代图书馆管理的内容。
27.按照使用范围划分,图书馆工作标准有几种?28.吴慰慈先生在《图书馆学概论》中认为的图书馆的社会职能包括哪些方面?29.试论述图书馆学五定律。
30.当前我国的图书馆系统。
31.图书馆员职业道德建设要从哪几方面做起?32.参考咨询的特点。
33.参考咨询体系的构成要素。
2学期英语复习题(new)
四川省委党校在职研究生英语复习题(2)一.S tructure and Vocabulary句型和词汇25.B1. English_________not a difficult language.(a) are (b) is (c) was (d) hasB2. He didn’t speak slowly and he didn’t speak clearly_________.(a) neither (b) either (c) too (d) norD3. He said something and I understood it. He said something___________I understood.(a) who (b) whose (c) whom (d) whichA4. At last he understood. He understood_____________.(a) in the end (b) at last(c) lastly (d) at the finishD5. My teacher__________ me English.(a) learnt (b) trained (c) instructed (d) taught26.B6. What is it about? Tell me(a) what is it about (b) what it is about(c) what about it is (d) what about is itD7. Do you like my picture? It's(a) a new (b) one new (c) new one (d) a new one A8. We like them we like pretty curtain material.(a) just as (b) the same (c) just the same (d) soD9. Young children often appreciate modem pictures. They them.(a) estimate (b) esteem(c) value (d) understand and enjoyD10. It's upside down. It isn't(a) up (b) down (c) the right way down (d) the right way up27.D11. this was done, they cooked a meal over an open fire.(a) As soon (b) Just as (c) Until (d) Just after B12. They sang songs by the campfire. They sang songs the campfire.(a) close (b) near (c) besides (d) atD13. They cooked a meal because they wanted to(a) sing songs (b) tell stories (c) play (d) eatC14. They crept into their tent, so they(a)made a lot of noise (b) ran quickly(c) were very quiet (d) were very noisyC15. They slept soundly. They slept(a) noisily (b) fast (c) deeply (d) good28B16. He has just bought a new house. He has been in it a short time.(a) since (b) for (c) about (d) agoD17. It is one of the ugliest faces I have ever seen. I've never seen (a) an ugly one (b) an ugliest one(c) the ugliest one (d) an uglier oneD18. The myth is an ancient one. Jasper himself isn't(a) an ancient (b) ancient (c) an old (d) oldD19. Not all car owners are good(a) guides (b) conductors (c) leaders (d) drivers A20. The signs haven't had any effect. They haven't anyone.(a) affected (b) effected (c) resulted in (d) imposed29B21. This is the most surprising thing about it. It is than anything.(a) most surprising (b) more surprising(c) more surprised (d) most surprisedB22. He was asked a businessman to fly to Rockall and he refused.(a) from (b) by (c) with (d) out ofB23.It's an unusual taxi. It isn't very(a) accustomed (b) common (c) usually (d) used toB24. It's a lonely village. It is(a) far (b) far from anywhere (c) alone (d) the only one B25. The car park was deserted. It was(a) a desert (b) empty (c) abandoned (d) wasted30D26. There is a river near the writer’s home. It is called______________.(a) a Wayle (b) Wayle (c) this Wayle (d) the WayleB27.Why did they kick the ball so________________?(a) hardly (b) hard (c) hardy (d) hardilyC28.There weren’t any in sight. They______________.(a) couldn’t see (b) hadn’t seen(c) couldn’t be seen (d) weren’t seenD29.Some people on the bank____________ the man.(a) cried (b) cried with(c) cried for (d) cried toD30. The ball_____________him very hard.(a) knocked at (b) beat (c) bounced (d) hit31C31. He used to work fourteen hours a day. He did this. day.(a) one (b) some (c) each (d) aA32. In his twenties, 728 people in the shop.(a) were employed (b) employed (c) are employed (d) employA33. Frank is the of a business company.(a) director (b) headmaster (c) superior (d) leader C34. Spare parts for aeroplanes are made in Frank's(a) industry (b) fabric (c) factory (d) workhouseC35. He was still smiling when the door opened and his wife(a) went in (b) entered in(c) entered (d) entered into32B36. There were fewer people in the shop than usual. There were(a) as many as usual (b) not as many as usual(c) as few as usual (d) more than usualC37.Which dress did she(a) chosen (b) chose (c) choose (d) choosing D38. A detective recently watched a well-dressed woman. He her.(a) looked (b) looked for(c) looked after (d) looked atD39. The assistant wrapped it. She it.(a) papered (b) turned(c) enveloped (d) made a parcel ofC40. The dress was free. It(a) was priceless (b) was worthless(c) cost nothing (d) was grateful33.A41. She swam to the shore the night in the water.(a) having spent (b) having spending (c) when spending (d) had spent B42. That was all she remembered. She couldn't remember(a) some more (b) anymore (c) no more (d) none more C43. She was caught in a storm. The weather was(a) fine (b) warm and sunny (c) very rough (d) wetC44. Cliffs are usually(a) narrow (b) wide (c) steep (d) sharpC45. That was all she remembered. She couldn't very much.(a) remind (b) memorise (c) recollect (d) mind34C46. The police Dan's bicycle.(a) had been finding (b) had been found(c) had found (d) have been findingD47. He never expected that find the bicycle.(a) to (b) to be (c) they (d) they would B48. All the police at the station are men.(a) topical (b) local (c) native (d) neighbourlyB49. The bicycle was picked up four hundred miles away. It was by a policeman.(a) picked (b) found (c) dropped (d) lifted A50. The bicycle was stolen. Dan was(a) robbed (b) stolen (c) taken (d) stealing35D51. He noticed two thieves out of a shop.(a) to come (b) are coming (c) in coming (d) comeA52. He got such a fright. He was frightened,(a) so (b) such (c) such a (d) a soA53. He hasn't regretted it. He it.(a) isn't sorry about (b) doesn't pity(c) isn't pleased with (d) doesn't laugh aboutA54. Roy drove the bus at the thieves.(a) directly (b) immediately (c) at once (d) soon D55. The thieves' car was battered because Roy(a) saw it (b) rang the police(c) recognized it (d) hit it36C56.He will be watching her anxiously she swims the long distance to England.(a) though meanwhile (b) meanwhile (c) while (d) duringC57. Debbie's friends will be on the coast. That's where of them will be.(a) more (b) the most (ci most (d) the more B58. Debbie hopes to a new world record.(a) do (b) make (c) build (d) fixD59. Mr. Hart has trained her. He's her(a) leader (b) guide (c) trainee (d) instructor C60. She'll take short rests every two hours. She will every two hours.(a) stay (b) remain (c) relax (d) sleep37B61. By the end of next year they will have finished the new stadium. This means they will finish it the end of next year.(a) at (b) before (c) after (d) long before D62. We are all very excited, are very excited.(a) All we (b) Us all (c) All us (d) All of us C63. How often do we the Olympic Games?(a) make (b) do (c) have (d) playB64. A motorway is a(a) street (b) road (c) avenue (d) high streetA65. We are looking forward to the Games. So we will be when they begin.(a) pleased (b) unhappy (c) sorry (d) impatient38A66. He acted he had never lived in England before.(a) as though (b) like (c) as (d) even if B67.He had hardly had time to settle down . he sold the house and left the country.(a) than (b) when (c) as soon as (d) afterD68. Harrison retired in England. So a job.(a) he was going to get (b) he had (c) he would have (d) he didn't have A69. It rained continually. It(a) stopped occasionally (b) never stopped(c) hardly rained at all (d) never rainedD70. It was more than he could bear. He couldn't it.(a )suffer (b) put up (c) carry (d) stand39.A71. The doctor refused to about his operation.(a) say him (b) tell to him (c) speak him (d) speak to himA72. When will he be allowed to go home? When will they(a) let him go (b) let him to go (c) leave him to go (d) leave him A73.A usually performs operations.(a) surgeon (b) doctor (c) nurse (d) matron C74. John Gilbert was a patient. He was(a) a sick (b) an ill (c) a sick man (d) not in a hurry B75. He inquired about a patient. He wanted(a) informations (b) information (c) knowledges (d) knowledgeC76. She asked me to sit next to Mrs. Rumbold. ' next to her,' she said.(a) Please to sit (b) To sit (c) Please sit (d) Please sitting A77. A new play is coming to 'The Globe' soon. It(a) hasn't come yet (b) is here (c) has already come (d) came B78.The opposite of 'tight' is(a) lose (b) loose (c) loses (d) loosen B79. 'The Globe' must be a(a) circus (b) theatre (c) play (d) nightclub D80. Are you enjoying your dinner? Is it(a) enjoying you (b) amusing you(c) entertaining you (d) giving you pleasure41D81. She is still in front of the mirror. She hasn't moved(a) still (b) even (c) also (d) yetB82. do you find it? Beautiful.(a) What (b) How (c) How much (d) WhereA83. She looked in the mirror and saw her(a) reflection (b) idol (c) imagination (d) picture A84. They walked out together, walked out.(a) They both (b) They all (c) Some of them (d) Neither of them B85. It looked like a lighthouse. It a lighthouse.(a) appeared similar (b) resembled (c) matched (at) likened42B86. We went to have a look at him. We wanted to him.(a) have (b) see (c) look (d) have seen C87. We were very much surprised. We were surprised.(a) more (b) many (c) most (d) the mostD88. It was covered with coins. There were coins it.(a) in (b) over (c) under (d) all over C.89 We had our first glimpse of the snake. We(a) saw it (b) looked at it(c) saw it for a moment (d) stared at itA90. The snake, however, continued to dance, the snake continued to dance.(a) But (b) So (c) Though (d) Even43.A91. Did the mountains_____________far below?(a) lie (b) lay (c) laid (d) lainD92. The people was then able to rise. This means it_____________.(a) could rise (b) might rise(c) might succeed in rising (d) roseA93. He would be able to reach the Pole__________ was 300 miles away.(a) which (b) who (c) it (d) which itC94. Byrd at once ordered them to do this. He ordered them to do this_____________.(a) once (b) soon (c) immediately (d) quicklyA95. Byrd now knew he would be able to___________ the South Pole.(a) arrive at (b) arrive (c) reach at (d) reach in44.C96. She was soon out of breath, but she continued_____________.(a) run (b) ran (c) running (d) in runningC97. They got such a fright. They were _____________.(a) so frightful (b) such frightened(c) so frightened (d) such frightD98.They didn’t steal anything. They stole______________.(a) anything (b) not anything (c) not nothing (d) nothingD99. She was the edge of the forest. She was ___________ the forest.(a) inside (b) near (c) among (d) at the tip ofB100. She was out of breath. She______________.(a) wasn’t breathing (b) was breathing with difficulty(c) couldn’t breath (d) stopped breathing二. Translate the following Chinese to English(见教材第二学期课文)三.Translate the following English into Chinese(见教材第二学期课文)四..Reading Comprehension 阅读理解(1)A new study shows that a large and rapid drop in the world’s birth rate has taken place during the past ten years. Families generally are smaller now than they were a few years ago. It is happening in both developing and developed nations.China is one of the developing nations that has made great progress in reducing its population growth. China has cut rate of population by about one half since 1970.Each Chinese family is now supposed to have no more than one child. And the hope is to reach a zero population growth with the total number of births equaling the total number of deaths, by the year 2000.Several nations in Europe already have fewer births than deaths.Researchers said that these nations could hardly have enough workers in the future, And the persons who are working could face much higher taxes to support the growing number of retiredpeople.1.Which of the following is true?_____A.Families are as large as beforeB.There was a slow population growth in the past 10 yearsC.The world‘s birth rate is higher than ten years agoD.Birth control has been well practiced in all nations2.China has reduced its population growth by___ since 1970A. around fifty percentB. far more than fifty percentC. exactly one halfD. much less than one half3.According to the passage, China‘s population control______A. is not very successfulB. is a not-too-big successC. is far from being successfulD. should be considered a big success4.By the year 2000, the number of births and the number of deaths in China will_____.A. be almost the sameB. be quits differentC. drop a great dealD. become much larger5.It is said that the people who are working in Europe would have to pay much higher taxes inthe future because______.A. they will be earning much more moneyB. they will have more and more childrenC. the number of retired people will become largerD. they will have to take good care of the old people(2)An old and very wealthy friend of mine told me he had an unpleasant experience. He went to a famous jewelry shop and asked to be shown some gold necklaces. After examining several, he decided to buy a necklace with a precious stone, and asked if he could pay by check because he had no cash with him. The assistant said that was quits in order, but the moment my friend signed his name, he was invited into the manager s office.The manager was very polite, but he explained that someone with exactly the same name had presented them with a worthless check not long ago. My friend got very angry when he heard this and said he would buy a necklace some where else. When he got up to go, the manager told him that the police would arrive at any moment and he had better stay unless he wanted to get into serious trouble. Sure enough, the police arrived soon afterwards. They were polite too, but explained that a person who had used the same name as his was responsible for a number of recent robberies. Then the police asked my friend to copy out a note which had been used by the thief in a number of stores. The note read,” I have a gun in my pocket. Ask no question and give me all the money in drawer.” Fortunately, my friend’s handwriting was quite unlike the thief’s. He was not only allowed to go without further delay, but to take the necklace with him.1.When the man asked if he could pay by check, the assistant_______.A .refused to take any B. invited him into the manager s officeC. said that was all rightD. said nothing was wrong with a check2.The man was invited into the manager s office because_____A.his handwriting was like a thief sB. a thief had used the same name as hisC. his check was worthlessD. he didn’t sign his name correctly3.After the man heard what the manager said he_____A.got very angry and left at onceB.went out to buy a necklace somewhere elseC.thought that he had nothing to do with the stealingD.insisted on staying until the police came4.The police were polite too because_____.A.they didn’t believe that the man was responsible for a number of recent robberiesB.they didn’t think the man was a thiefC.the man was old and very wealthyD.they were not sure whether the man was the thief they wanted5.From this passage ,we can see_____A.though the man some trouble, he bought the necklace without paying cashB.nobody noticed the man take the necklace with himC.The manager never thought an old man would be a thiefD.The thief always sole things in famous jewelry shops(3)Today anyone will accept money in exchange for goods and services. People use money to buy food, furniture, books, bicycles and hundreds of other things they need or want. When they work, they usually get paid in money.Most of the money today is made of metal or paper. But people used to use all kinds of things as money. One of the first kinds of money was shells.Shells were not the only things used as money for a long time. Elephant tusks(象牙),monkey tails, and salt were as money in parts of Africa. Cattle were one of the earliest kind of money. Other animals were used as money, too.The first metal coins were made in China. They were round and had as square hole in the center.Different countries have used different metals and designs for their money. The first coins in England were made of tin. Sweden and Russia used copper to make their money. Later, countries began to make coins of gold and silver.But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money. They began to use paper money. The first paper money looked more like a note from one person to another than the paper money used today.1.Today money is mainly used to____A. buy thingsB. pay for workC. both A and B D .study its history2._____the first coins were madeA. It was hard to say whereB. It was in many different countries thatC. It was in England thatD. It was by the Chinese that3. Which of the following statements is true?A.Tin was the first kind of metal used to make coinsB.Gold and silver were used to make coins before any other metalC.Copper was used to make coins before gold or silverD.There were more countries that used copper to make coins than those that used any othermetal4. People began to use paper money because____A.even gold and silver were heavy to carry when you wanted to travelB.coins were not safer to carry than paper moneyC.paper money was much easier to makeD.paper money was much lighter in weight than any kind of metal money5. The first paper money_____A. looked just like used todayB. was not much different from that at the present timeC. looked very little like that we are using nowD. was like both a note and the paper money used now, and there was only slight difference among them(4)Creeping up on the ground, Johnson knew that he could not go much farther. His strength gave out. His will to keep going, his will to live had almost died away. It seemed like a terrible dream in which he was a helpless actor. He had no food or water for three days. He dragged himself slowly across the burning sand to the top of the hill and with tired eyes he looked beyond.At first he saw nothing but sand. Then, away to his right, his eyes were fixed on a spot of green trees. That meant water. That meant life.With a great effort he stood up and with unsteady but determined steps he moved on..1.Johnson‘s journey seemed to him like a dream because_____A. he had a good timeB. he was a helpless actorC. he had almost broken his legsD. he was in a state of difficulty2.What made him full of hope again?A. Seeing a dull spotB.A lightC. SoundD. Something green3.Johnson was traveling on _____A. the grasslandB. the hillC. the seaD. the sand4.The word “unsteady” means ________:A. creepingB. slowlyC. swayingD. crossing5.From this passage we learned that Johnson was______A. under the groundB. dreaming a terrible dreamC. walking hardD. an actor in a film答案:第一部分见题前第二.三部分(见教材课文和课文译文)第四部分.1. BADAC2. CBCDA3. CDCDC4.DDDCC。
大学生创业计划大赛创业知识问答复习题2
辽宁省第二届大学生创业计划大赛创业知识问答题一、创业政策部分1.在党的十七大报告中,明确提出“实施扩大就业的发展战略,促进以”的总〔2011〕16〔2011〕16A.小额担保贷款B.银行贷款5.《2012年国家鼓励普通高校毕业生自主创业政策公告》中规定,对符合条件的高校毕业生自主创业的,可在按规定申请小额担保贷款。
(B)A.学校所在地B.创业地6.《2012年国家鼓励普通高校毕业生自主创业政策公告》中规定,对符合条件的高校毕业生自主创业,从事微利项目的,可享受不超过贷款额度的财政贴息扶持;合伙经营和组织起来就业的,可根据实际需要适当提高贷款额度。
(A)A.10万元B.8万元7.《2012年国家鼓励普通高校毕业生自主创业政策公告》中规定,高校毕业生以内从事个体经营时,自在工商部门首次注册登记之日起3年内,可免交管理类、毕业毕业毕业A.依次扣减B.免交11.《2012年国家鼓励普通高校毕业生自主创业政策公告》中规定,对高校毕业生在内参加创业培训的,根据其获得创业培训合格证书或就业、创业情况,按规定给予培训补贴。
(A)A.毕业年度B.两年择业期12.《2012年国家鼓励普通高校毕业生自主创业政策公告》中规定,进入“高校学生科技创业实习基地”创办企业,可以享受减免的房租、专业技术服务与咨询、相应的公共设施以及公共信息平台服务。
(A)A.12个月B.24个月13.毕业年度内高校毕业生在校期间创业的,可以注册登录教育部大学生创业服(A)志))A.毕业所在自然年B.毕业后一年内18.《高校毕业生自主创业证》发放的对象是指毕业年度内在校期间创业的高校毕业生。
其中,高校毕业生是指实施高等学历教育的普通高等学校、成人高等学校毕业的学生;毕业年度是指毕业所在自然年,即。
(A)A.1月1日至12月31日B.7月1日至12月31日19.毕业年度内高校毕业生在校期间创业的,可持《高校毕业生自主创业证》向创业地县以上人力资源和社会保障部门提出认定申请,由创业地人力资源和社会保障部门核发,作为当年及后续年度享受创业税收扶持政策的管理凭证。
(完整版)外科学各章节复习题及答案
外科学各章节复习题及部分试题答案第一章无菌术一、名词解释1.无菌术: 就是针对微生物及感染途径所采取的一系列预防措施。
2.灭菌法:预先用物理方法(高温等)把与手术区或伤口接触的物品上杀灭一切活的微生物。
3.抗菌法:应用化学方法杀灭某些手术器械、手术人员手臂和病人术野皮肤以及手术室空气中病原微生物的方法。
二、填空题1.需要灭菌的各种包裹不应过大、过紧,一般应小于_40X30X30CM_。
2.煮沸灭菌法适用于一般金属器械、玻璃及橡胶类等物品的灭菌。
在水中煮沸至_100℃后,持续_15-20分钟,一般细菌可杀灭,但带芽胞的细菌至少需煮沸_60分钟才能被杀灭。
三、问答题1.药物浸泡消毒法适用于哪些器械?其注意事项是什么?2.病人手术区的准备其目的是什么?若腹部手术区曾用胶布粘贴过,应如何用消毒?第二章外科病人的体液失调一、名词解释1.高渗性脱水:又称原发性脱水。
体液丢失水比钠丢失多,故血清钠高于正常范围,细胞外液的渗透压升高。
2.反常性酸性尿:在低钾血症时,由于远曲肾小管Na、K交换减少,Na、H交换增加使肾排H增多。
虽然体内为低钾性碱中毒,但是尿液却呈酸性,故称反常性酸性尿。
3.酸碱平衡:在机体新陈代谢过程中,不断摄入和产生酸性和碱性物质,机体依赖体内的缓冲系统、肺和肾调节,使体内的酸碱维持在一个正常范围内,称为机体的酸碱平衡。
二、填空题1.轻度缺钠后,病人觉疲乏、头晕、手足麻木、口渴不明显,尿中Na+_减少_,血清Na+在_1 35mmol/L_以下,每公斤体重缺氯化钠_0.5_g。
+--2.细胞外液中最主要的阳离子是_Na_,主要阴离子是_CI_,_HCO3_,和__蛋白质_。
3.机体主要通过__神经—内分泌调节__来维持体液的平衡,保持内环境稳定。
三、问答题1.补钾时应注意哪些问题?2.试述代谢性碱中毒的常见原因、临床表现和诊断依据。
第三章输血一、名词解释1.冷沉淀:是新鲜冷冻血浆(FFP)在4℃下融解时不融的沉淀物,2.自体输血:是收集病人自身血液后在需要时进行回输。
工程材料复习题问答分析题-2
四、问答题1、什么是金属的力学性能金属的力学性能主要包括哪些方面?材料在一定温度条件和外力作用下,抵抗变形和断裂的能力称为材料的力学性能。
材料的常规力学性能指标主要包括强度、硬度、塑性和韧性等。
2、什么是钢的热处理常用热处理方法有哪几种?通过对钢件作一定条件的加热、保温和冷却,从而改变整体或表层的组织,获得所需的性能。
常用热处理方法有:退火、正火、淬火和回火。
3、钢按化学成分可分为哪几类?钢按化学成分可分为碳素钢和合金钢两大类。
其中,碳素钢按含碳量的多少分低碳钢、中碳钢、高碳钢;合金钢按合金元素种类分锰钢、铬钢、硼钢、铬镍钢、硅锰钢,按合金元素含量的多少分低合金钢、中合金钢、高合金钢。
4、灰铸铁、球墨铸铁、可锻铸铁、蠕墨铸铁在组织上的根本区别是什么?四种材料的在组织上的根本区别是铸铁中的石墨的形态不同(形状、大小、数量、分布等),灰铸铁的石墨是片状,球墨铸铁的石墨是球状,可锻铸铁的石墨是团状,蠕墨铸铁的石墨是虫状。
5、硬质合金的主要组成是什么常用硬质合金分哪几类各有何主要应用?硬质合金的主要组成是难熔金属碳化物和粘结金属。
常用硬质合金分为钨钴类硬质合金(代号YG)和钨钴钛类硬质合金(代号YT) 两种。
YG合金多用于加工产生断续切屑的的脆性材料(如铸铁),YT合金多用于加工产生连续切屑的韧性材料,特别是高速切削钢件。
分析下列材料强化方法的强化机理1、细晶强化:晶界增加提高强度2、热处理强化改变组织结构提高强度3、固溶强化晶格变形提高强度4、合金强化固溶强化和碳化物强化&5、加工硬化位错增加提高强度1.在铸造生产中,采用哪些措施获得细晶粒组织答:(1) 增加过冷度(2)进行变质处理(3) 附加振动2.说明实际金属晶体缺陷种类及特征。
答:根据晶体缺陷的几何尺寸大小可分为三类:点缺陷,线缺陷,面缺陷。
点缺陷的主要类型有空位和间隙原子。
晶体中的线缺陷就是位错。
面缺陷包括晶界、亚晶界和孪晶界。
》3.简述石墨形态对铸铁的影响答:根据铸铁中石墨形态,铸铁可分为: (1)灰铸铁它是以片状石墨形式存在。
Java语言程序设计复习题(new)
Java语言程序设计复习题(new)一、选择1 Java源程序文件的扩展名为:A 。
()A..java B..jar C..class D..txt2 下列选项中,反映了Java程序并发机制的特点。
( B )A.安全性B.多线程C.跨平台D.可移植3 下列描述中,错误的是。
(A )A.Java要求编程者管理内存B.Java的安全性体现在多个层次上C.Java是面向对象程序设计语言D.Java有多线程机制4 JDK提供的java编译器为。
(B )A.java.exe B.javac.exe C.javaprof.exe D.javap.exe 5 下列语句中,属于多分支语句的是 A 。
( )A.if语句B.for语句C.switch语句D.while 语句6 下列选项中, 不合法的标识符为 D 。
()A.MyGame B._isHers C._$doc D.2japro7线程生命周期中正确的状态是 C 。
()A.新建状态、运行状态和死亡状态B.新建状态、运行状态、阻塞状态和死亡状态C.新建状态、就绪状态、运行状态、阻塞状态和死亡状态D.新建状态、就绪状态、运行状态、恢复状态和死亡状态8 下列不属于Swing GUI组件的是。
()A.Jbutton B.Menu C.Jslider D.JT abbedPan 9 若特快订单是一种订单,则特快订单类和订单类的关系是C。
()A.使用关系B.包含关系C.继承关系D.无关系10Java语言使用的字符码集是。
( D )A.ASCII B.BCD C.DCB D.Unicode 11 程序运行时若引发一个可识别的错误,就会产生一个异常类对象,该过程称为A。
()A.捕获异常B.抛出异常C.声明异常D.嵌套异常12 设x = 1 , y = 2 , z = 3,则表达式y+=z--/++x的值是A 。
()A.3 B.3.5 C.4 D.513不是类及类成员的访问控制符的是C 。
期末复习讲解(2012级)
二、 考试形式、时间、涉及内容 考试形式为闭卷,时间为 90 分钟 涉及内容:各讲内容均有涉及
三、 样题(与考题无必然联系,仅供参考)
(1)单选题:
1、C 语言中,运算对象必须是整型的运算符是【
A. /
2、下列标识符中,不合法的是【 】
A. x2
B. %
B. sizeof
3、 若 x, i, j 和 k 都是 int 型变量,则计算表达式 x=(i=4, j=16, k=32)后,x 的
A. 1-2
B. 30
7、下列程序段执行之后,输出的结果是【 】
double x=4,y; if (x<0)
y=0; else if(x<10)
y=1.0/x; else
y=1; printf("%.2f\n",y);
A. 0.25
B. 0.50
B. scanf(" %f", d) ;
D. scanf(" %lf", &d) ;
已知字母 A 的 ASCII 码为 65,程序运行后的输出结果是 D,69
2、 #include <stdio.h> int a=5; void fun(int b) {
int a=10; a+=b;//a=a+b; printf("%d,",a); } int main() { int c=20; fun(c); a+=c;//a=a+c;a=5+20; printf("%d\n",a); return 0; }
A. 定义不合法
C. 是一个指针,它指向一个具有 3 个元素的一维数组
(NEW)人教版小学六年级英语上册《第五单元》知识点及复习题
人教版小学六年级英语上册《第五单元》知识点及复习题Unit 5 What dose he do ?一、单元词汇factory 工厂 worker 工人 postman 邮递员 businessman 商人police officer 警察 Fisherman 渔民 scientist 科学家 pilot 飞翔员coach 教练country 国家 head teacher 校长 sea 海洋 stay 保持(动词) university 大学gym 体育馆 if 假如 reporter 记者 use 使用(动词) type 打字(动词) quickly快速地(副词) secretary 秘书二、 Part A 课文导入Sarah: Is your father here 【 1】 today ?Oliver :No. He ’ s in Australia.Sarah: What does he do【2】?Oliver :He’ s a businessman. He often goes to other countries.Sarah: And what does your mother do ?Oliver :She’ shead teacher.Sarah: That ’ s nice.Oliver :Yeah. She’【ll 3be】here today!Sarah: Do you want to be a head teacher , too ?【 4】Oliver :No,I want to be a businessman.1、here ,副词,意为“这里”,其反义词为“ there那边”Come here, kids. Let’ s go to the nature!park孩子们,到这里来,我们一同去自然公园!2、What does he do ?他做什么的?What do/does+ 主语 +do?这是用来咨询职业的常用句型,意为“某人做什么的?”,当主语为第三人称单数时,助动词用 does。
中考单项选择讲解new2
D the tallest
D the tallest D the highest
和, 但是,因为, 否则/或者 it’s too dear. -1 It looks nice, _______ C A. or B. and C. but D. for 2 Hurry up, A___you will miss the bus. A or B but C and D for D 3 I am late for school ______the weather is too bad. A or B but C and D because A 4 I went to the park ____played with my friends. A and B but C or D for
In Two days.
• 1____ did your family spend New Year? where • —In our hometown. • A. Why B. When C. Where D. How • 2— ________ Whendid you go to the doctor, Tim? • — Two weeks ago. • A. How B. Where C. What D. When • 3 were you late for school this morning? • Why ______— Because I got up late and missed the bus. • A. Where B. When C. Why D. What How • 4 soon __ will your father come back from New York?
:
A
D Tom, Jim or Mike? 3 Which is _____ A tall B taller C tallest D boys in our class. 4 Mike is one of _____ A tall B taller C tallest 5 He jumps as _______as him. B A higher B high C highest
中考英语特训总复习第二部分语法专题突破篇第28课时动词的时态、语态(精讲)试题(new)
第28课时动词的时态、语态一、动词的时态动词的时态是中考考查的重点内容,初中阶段涉及了以下八种时态:一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去将来时、过去完成时,其中前六种是常用时态,要求重点掌握。
对于动词的时态的考查主要涉及以下考点: 1.掌握常用的六种时态的构成、用法以及标志性时间状语;2.理解过去将来时和过去完成时的用法。
一般现在时1.构成(1)be(am/is/are)+表语(名词、形容词等)(2)实义动词用原形或单三人称单数形式2.用法(1)表示经常性或习惯性的动作,常与表示频度的时间状语连用,如often,sometimes,usually,always,once/twice a week/month,every day/week/month…,on Sunday等。
如:Lucy often goes to school by bike.露西经常骑自行车去上学。
I brush my teeth twice a day.我一天刷两次牙。
(2)表示主语现在的状态、性格、身份、能力等.如:Lily is more outgoing than Linda.莉莉比琳达更开朗。
Peter likes beef noodles。
彼得喜欢牛肉面。
(3)表示客观事实、真理或用于格言警句中。
如:The earth goes around the sun。
地球绕着太阳转.Practice makes perfect.熟能生巧。
(4)某些动词如come,go,leave等,可用一般现在时(或现在进行时)表示一般将来时,这主要用来表示在时间上已确定或安排好的事情.如:The train leaves at six tomorrow morning.火车将于明天早上六点出发.The bus is coming soon。
公交车快来了。
(现在进行时表示即将发生的动作)【对点导练】用括号内所给单词的适当形式填空。
连退工艺复习题(问答题) (2)
问答题复习题1、简要说明碱洗脱脂的目的与作用,以及清洗的机理。
1)碱洗脱脂的目的与作用:去除冷轧带钢表面的轧制油及其它表面污染(如铁粉、焊渣、等)。
防止污染炉内气氛,带钢表面质量,辊子结瘤。
2)清洗的机理是利用化学的方法:热碱液与轧制油反应生成可溶于水的肥皂和甘油;机械的方法:碱液喷淋和刷洗;并利用电解的方法:在带钢表面析出氢气和氧气泡,破坏油膜带走油脂。
2、写出碱洗段、炉子段的工艺过程。
以及入口段、出口段的工艺过程。
①入口段:原料钢卷——入口步进梁——自动拆捆机――钢卷移动小车——(1#和2#)钢卷小车——(1#和2#)开卷机——(1#和2#)直头机——(1#和2#)入口剪——激光焊机——清洗段——入口活套——炉子段——出口活套——平整机——自动表面缺陷检测仪――粗糙度检测仪――检查活套——切边剪——去毛刺机——检查台——机械性能检测仪(预留)――静电涂油机——出口飞剪——(1#和2#)卷取机——(1#和2#)钢卷小车——移动小车——称重仪——自动打捆机——钢卷打印机(预留)--出口输送设备②清洗段:预清洗槽(喷淋与刷洗)→电解脱脂槽→(挤干辊)→热水冲洗槽(刷洗、漂洗、喷洗)→热风干燥→进口活套③炉子段:预热→加热→均热→缓冷→快冷→过时效→终冷→水淬和热风干燥。
④出口段:出口活套——平整机——自动表面缺陷检测仪――粗糙度检测仪――检查活套——切边剪——去毛刺机——检查台——机械性能检测仪(预留)――静电涂油机——出口飞剪——(1#和2#)卷取机——(1#和2#)钢卷小车——移动小车——称重仪——自动打捆机——钢卷打印机(预留)--出口输送设备3、平整的主要作用(1) 消除退火带钢的屈服平台,改善带钢的组织结构;(2) 改善带钢的平直度,提高表面质量;(3) 减轻或消除原料的板形不良现象,为后续加工创造良好条件;(4) 通过使用毛化处理的工作辊,使带钢表面具有一定的粗糙度;(5) 改善材料力学性能,扩大材料塑性变形范围。
第十二章习题答案new讲解
1、分析电子衍射与X 衍射有何异同?答:相同点:① 都是以满足布拉格方程作为产生衍射的必要条件。
② 两种衍射技术所得到的衍射花样在几何特征上大致相似。
不同点:① 电子波的波长比x 射线短的多,在同样满足布拉格条件时,它的衍射角很小,约为10-2rad 。
而X 射线产生衍射时,其衍射角最大可接近 2。
② 在进行电子衍射操作时采用薄晶样品,增加了倒易阵点和爱瓦尔德球相交截的机会,使衍射条件变宽。
③ 因为电子波的波长短,采用爱瓦尔德球图解时,反射球的半径很大,在衍射角θ较小的范围内反射球的球面可以近似地看成是一个平面,从而也可以认为电子衍射产生的衍射斑点大致分布在一个二维倒易截面内。
④ 原子对电子的散射能力远高于它对x 射线的散射能力,故电子衍射束的强度较大,摄取衍射花样时曝光时间仅需数秒钟。
2、倒易点阵与正点阵之间关系如何?倒易点阵与晶体的电子衍射斑点之间有何对应关系? 答:倒易点阵是与正点阵相对应的量纲为长度倒数的一个三维空间点阵,通过倒易点阵可以把晶体的电子衍射斑点直接解释成晶体相对应晶面的衍射结果,可以认为电子衍射斑点就是与晶体相对应的倒易点阵某一截面上阵点排列的像。
关系:① 倒易矢量g hkl 垂直于正点阵中对应的(hkl )晶面,或平行于它的法向N hkl② 倒易点阵中的一个点代表正点阵中的一组晶面③ 倒易矢量的长度等于点阵中的相应晶面间距的倒数,即g hkl =1/d hkl④ 对正交点阵有a *//a ,b *//b ,c *//c ,a *=1/a ,b *=1/b ,c *=1/c 。
⑤ 只有在立方点阵中,晶面法向和同指数的晶向是重合的,即倒易矢量g hkl 是与相应指数的晶向[hkl]平行⑥ 某一倒易基矢量垂直于正交点阵中和自己异名的二基矢所成平面。
3、用爱瓦尔德图解法证明布拉格定律。
证:如图,以入射X 射线的波长λ的倒数为半径作一球(厄瓦尔德球),将试样放在球心O 处,入射线经试样与球相交于O*;以O*为倒易原点,若任一倒易点G 落在厄瓦尔德球面上,则G 对应的晶面满足衍射条件产生衍射。
new计算机概念及答案
一、单项选择题1. 与十进制数254等值的二进制数是( )。
A.B.C.D.答案:A2. 下列选项中,不属于计算机病毒特征的是( )。
A. 破坏性B. 潜伏性C. 传染性D. 免疫性答案:D3. 程序只有装入( )才能运行。
A. 内存B. 硬盘C. 光盘D. 软盘答案:A4. 在微型计算机中,应用最普遍的字符编码是()。
A. BCD码B. 补码C. ASCII码D. 汉字编码答案:c5. 计算机应用中,“MIS”表示( )。
A. 决策支持系统B. 管理信息系统C. 办公自动化D. 人工智能答案:B6. 计算机能够自动地按照人们的意图进行工作的最基本思想是程序存储,这个思想是由( )提出来的。
A. 布尔B. 图灵C. 冯.诺依曼D. 爱因斯坦答案:C7. 盘上的磁道是( )。
A. 一组记录密度不同的同心圆B. 一组记录密度相同的同心圆C. 一条阿基米德螺旋线D. 二条阿基米德螺旋线答案:A8. 计算机中的磁盘驱动器指示灯亮时,此时( )。
A. 打开该驱动器开关,关闭主机电源B. 打开该驱动器开关,取出磁盘C. 关闭该主机电源,打开该驱动器开关,取出磁盘D. 不能打开该驱动器开关和关闭主机电源答案:D9. 计算机存储单元存放的内容为( )。
A. 指令B. 数据或指令C. 数据D. 程序答案:B10. CPU的中文名称是( )。
A. 控制器B. 主存储器C. 运算器D. 中央处理器答案:D11. 微型计算机的中央处理器与( )组成了微型机的主机。
A. 运算器B. 外存储器C. 内存储器D. 内(外)存储器答案:C12. 一般说来,计算机指令的集合称为( )。
A. 机器语言B. 汇编语言C. 模拟语言D. 程序答案:D13. 操作系统是对计算机系统的全部资源进行控制与管理的系统软件,系统资源指的是( )。
A. 软件、数据、硬件、存储器B. 处理机、存储器、输入/输出设备、信息C. 程序、数据、输入/输出设备、中央处理器D. 主机、输入/输出设备、文件、外存储器答案:B14. 下列一组描述中,正确的是( )。
第二章复习题
第二章复习题
第二章是在学习某个特定主题时的进一步深入。
在这一章中,我们将回顾和巩固我们在第一章中学到的知识,并进一步探讨一些相关的概念和技巧。
本文将提供一些复习题,以帮助读者回顾和加强对第二章内容的理解。
1. 什么是XXX(某个概念)?请用自己的话简要解释。
2. 列举并解释 XXX(某个主题)的三个关键要素。
3. 在XXX(某个领域)中,什么是XXXXX(某个术语)的作用?请举例说明。
4. 将以下术语与其定义相匹配:
A. 术语1
B. 术语2
C. 术语3
1) 定义1
2) 定义2
3) 定义3
5. 请简要解释逻辑运算符 AND、OR、NOT 的作用及其在计算
机科学中的用途。
6. 在XXX(某个领域)中,有哪些常见的问题类型?请列举并
简要解释每种类型。
7. 在XXX(某个主题)中收集数据的过程中,有哪些常见的挑战?请列举并提供相应的解决办法。
8. 在XXX(某个领域)中,什么是XXXXX(某个概念)?请
用简洁明了的语言解释。
9. 请解释以下术语的含义,并简要描述它们在XXX(某个领域)中的作用:
A. 术语1
B. 术语2
C. 术语3
10. 在XXX(某个领域)中,什么是XXXXX(某个工具或技术)?请提供一个实际应用的例子。
以上是一些针对第二章内容的复习题,希望通过这些问题的回答,读者能够对第二章的知识有更加深入的理解和掌握。
接下来,读者可以针对这些问题进行整理和总结,以便能够更好地应用和运用这些概念、技巧和工具。
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第二章1、已知一个求值公式(3A+2B)/(A+5B2+C),若A、B、C已赋值,试画出该公式求值过程的前趋图。
解:令S1:X1 = 3A;S2:X2 = 2B;S3:X3 = X1+X2;S4:X4 = 5B2;S5:X5 = A+X4+C;S6:X6 = X3/X5则求值过程的前趋图为:2、已知一个求值公式(B2+AB)/(5B+A),若A、B已赋值,试画出该公式求值过程的前趋图。
解:令 S1:X1 = B2;S2:X2 = AB;S3:X3 = X1 + X2;S4:X4 = 5B;S5:X5 = X4 + A;S6:X6 = X3 / X5。
则求值过程的前趋图为:(自己画出)3、写出实现两个进程单向同步问题的伪码。
(参考讲义)3、写出通过信号量实现生产进程和消费进程(单缓冲区)双向同步的伪码。
(参考讲义)解:定义信号量:var s1,s2: semaphore :=1,0;生产进程伪码:Process P:beginwhile(true) dobegin生产一个产品;wait(s1); //P操作,等待可以生产的信号量将产品放入缓冲区。
//其他操作singal(s2);//V操作,发送可以消费的信号量endend消费进程伪码:Process C:beginwhile(true) dobeginwait(s2); //P操作,等待可以消费的信号量从缓冲区中取出产品进行消费。
//其他操作singal(s1); //V操作,发送可以生产的信号量endend4、写出通过信号量实现进程1和进程2互斥访问共享资源(临界资源)的伪码。
(参考讲义)解:定义信号量:var s: semaphore :=1;访问资源进程1伪码:Process P1:beginwhile(true) dobeginwait(s); //P操作,申请访问资源权限的的信号量临界区代码; //其他访问资源操作singal(s);//V操作,释放访问资源权限的信号量endend访问资源进程2伪码:(同P1类似)Process P2:beginwhile(true) dobeginwait(s); //P操作,申请访问资源权限的的信号量临界区代码; //其他访问资源操作singal(s); //V操作,释放访问资源权限的信号量endend5、写出具有缓冲池(n个缓冲区)的生产者-消费者问题的伪码。
(参考讲义、教材)6、写出公共汽车司机和售票员同步问题的伪码。
(参考讲义)解:信号量定义var s1,s2:semaphore:=0,0;//s1为控制能否行车的信号量//s2为控制能否开门的信号量司机进程:Process Driver:beginwhile(true) dobeginwait(s1);加油行车;到站停车;singal(s2);endend售票员进程:Process Conductor:beginwhile(true) dobegin关车门;singal(s1);售票;wait(s2);开车门;endend7、读者-写者同步问题(参考讲义和教材)第三章1、系统有5个进程,其就绪时刻(指在该时刻已经在就绪队列中就绪)、服务时间如下表所示。
当分别采用先来先服务(FCFS)和短进程优先(SPF)算法时,画出调度过程,并计算平均周转时间和平均带权周转时间。
(平均周转时间=平均带权周转时间=平均周转时间= 平均带权周转时间=2、系统中有5个进程,每个进程的运行时间和到达时刻如下表所示。
若采用时间片轮转调度算法(时间片为1),画出进程执行过程,P95)解:进程执行过程如下:时间:P1P2P3P4P5平均周转时间:(11+1+6+2+8)/5 = 5.6 平均带权周转时间:(11/5+1/1+6/2+2/1+8/3)/5≈2.173、系统中有5个进程,每个进程的运行时间、优先级和到达时刻如下表所示。
若采用抢占式优先级调度算法(优先级越大越优先执行)4、假定系统中有三个进程P1、 P2和P3,共有12台磁带机。
进程P1总共要求10台磁带机,P2和P3分别要求4台和9台。
假设在T0时刻,进程P1、P2和P3已分别获得5台、2台和2台磁带机,如下表所示:(1) 该状态是否是安全状态?请说明理由。
解:T0时刻,系统是处于安全状态,因为此时的空闲磁带机资源为3,存在一个安全序列<P2、P1、P3>,即只要系统按此进程序列分配磁带机资源,就能够使三个进程都顺利完成。
(为什么?)(2) 若到达一新进程P4,请求1台磁带机,其最大需求为4台,是否可以分配?请说明理由。
(参考P108)解:可以进行资源分配。
因为将1台磁带机分配给P4后,尚有2台空闲磁带机,存在一个安全序列<P2、P4、P1、P3>,即只有系统按此进程序列分配磁带机资源,就能够使四个进程都顺利完成。
(为什么?)5、设系统中有3种类型的资源(A ,B ,C)和5个进程P1、P2、P3、P4、P5,A 资源的数量为17,B 资源的数量为5,C 资源的数量为20,在T0时刻系统状态如下表所示。
系统采用银行家算法实施死锁避免策略。
(参考P110)(1) T0时刻是否为安全状态?若是,请给出安全序列;T0时刻是安全状态。
存在安全序列<P4、P2、P3、P5、P1>(为什么?能否找出其他安全序列?)(2) 若在T0时刻进程P2请求资源(0, 3, 4),是否能实施资源分配?为什么?解:若在T0时刻进程P2请求资源(0, 3, 4),不能实施资源分配。
因为请求资源数(0, 3, 4)≤可用资源数(2, 3, 3)不成立,没有足够资源。
(3) 在(1)的基础上,若进程P4请求资源(2, 0, 1),是否能实施资源解:可以实施分配,因为分配后有安全序列:<P4、P2、P3、P5、P1 >(为什么?能否找出其他安全序列?),即分配后的状态是安全的。
6、假定系统中有三个进程P1、P2和P3,共有12台磁带机。
进程P1总共要求10台磁带机,P2和P3分别要求4台和9台。
假设在T0时刻,进程P1、P2和P3已分别获得5台、2台和2台磁带机,尚有3台空闲未分配,如下表所示:(参考教材P108)(1) T0时刻是否为安全状态?若是,请给出安全序列;(2) 在T0时刻P3申请一台磁带机,请问能否实施资源分配,为什么?解:参考教材7、理解FCFS和SJF作业调度算法思想。
9、通过上课所讲示例理解EDF(最早截止时间优先)算法和LLF(最低松弛度优先)算法思想。
第四章1、某系统采用动态分区分配方式管理内存,内存空间为640KB,高端40KB用来存放操作系统。
在内存分配时,系统优先使用空闲区低端的空间。
对下列的请求序列:作业1申请130KB,作业2申请60KB,作业3申请100KB,作业2释放60KB,作业4申请200KB,作业3释放100KB,作业1释放130KB,作业5申请140KB,作业6申请60KB,作业7申请50KB,作业6释放60KB,请分别画图表示出使用首次适应算法和最佳适应算法进行内存分配和回收后,内存的实际使用情况。
(参考教材和讲义)解:参考教材、讲义和下题方法2. 某操作系统采用分区存储管理技术。
操作系统在低地址占用了100KB的空间,用户区主存从100KB处开始占用512KB。
初始时,用户区全部为空闲,分配时截取空闲分区的低地址部分作为已分配区。
在执行以下申请、释放操作序列后:请求300KB;请求100KB;释放300KB;请求150KB;请求50KB;请求90KB,进行以下回答:(1) 分别采用首次适应算法和最佳适应算法时,主存的实际使用情况如何?分别画出主存分布图,并指出空闲分区的首地址和大小;(2) 若随后又要请求80KB,针对上述两种情况产生什么后果?说明了什么问题?(参考教材和讲义)(1) 采用首次适应算法时,主存分布图如下图空闲区1:首地址390KB,大小10KB;空闲区2:首地址500KB,大小112KB;(2) 采用最佳适应算法时,主存分布图如下图空闲区1:首地址340KB,大小60KB;空闲区2:首地址550KB,大小62KB;(3) 若随后又要请求分配80KB,首次适应算法可顺利分配,而最佳适应算法不能。
说明首次适应算法可在高址端保留大分区。
3、某分页系统的逻辑地址为16位,其中高6位为页号,低10位为页内偏移量,则在这样的地址结构中:(1) 一页有多少个字节?(2) 逻辑地址可有多少页?(3) 一个进程最大的逻辑地址空间是多少KB?(参考P130)解:210 = 1024 因此一页有1024字节26 = 64 因此逻辑地址可有64页216 = 64KB 因此一个进程最大的逻辑地址空间是64KB4、某系统采用页式存储管理策略,拥有逻辑空间32页,每页为2KB,拥有物理空间1MB。
(1)写出逻辑地址的格式。
解:11位页内地址,5位页号(2)若不考虑访问权限等,进程的页表最多有多少项?每项至少有多少位?解:因为有32个逻辑页面,所以页表有32项。
因为有1M/2K= 2的9次方物理块,所以每个页表项至少有9位(3)如果物理空间减少一半,页表结构应相应作怎样的改变?解:32项,每项至少需要8位5、对于如下表所示的段表,请将逻辑地址(0,137),(1,4000),(2,3600),解:(0,137)对应的物理地址为:50K+137 = 50*1024+137 = 51337;(1,4000)的段内偏移地址越界,是一个不合法逻辑地址;(2,3600)对应的物理地址为:70K+3600 = 75280(5,230)的段号越界,是一个不合法逻辑地址。
6、在一个请求分页系统中,假如一个作业的页面走向为4,3,2,1,4,3,5,4,3,2,l,5,目前它还没有任何页装入内存,当分配给该作业的物理块数目M分别为3和4时,请分别计算采用OPT、LRU和FIFO页面淘汰算法时访问过程中所发生的缺页次数和缺页率,并比较所得的结果。
解:请参照讲义画出调页过程,7、系统为某进程分配了三个物理块,页面访问顺序为:7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1,试问采用OPT、FIFO、LRU置换算法时会产生多少次缺页中断?(假定初始时所有页面均未装入内存;请画出置换过程)解:参照讲义8、在某个分页管理系统中,某一个进程有4个页面,被分别装入到主存的第3、4、6、8块中,假定页面和块大小均为1024字节,当进程在CPU上运行时,执行到一条传送指令:MOV 2100, 3100 请计算出MOV指令中两个操作数(逻辑地址)的物理地址。
解:2100 / 1024 = 2 第2页放在第6块中2100 % 1024 = 526×1024 + 52 = 6196因此第一个操作数的物理地址为6196。