《英语国家概况(二)》16秋在线作业2
奥鹏17春川大《英语国家概况(二)》16秋在线作业2
一、单选题（共20 道，共50 分。）
1. The presidency is open to all Irish citizens who are at least（）years old.
A. 30
B. 36
C. 40
D. 35
标准解：
2. What are the two opposed and competing Parties that dominated the Republic of Ireland?
A. Fianna Fáil and Seanad éireann
B. Fianna Fáil and Fine Gael
C. Dáil éireann and Seanad éireann
D. Dáil éireann and Fine Gael
标准解：
3. Among the following poets, （）doesn’t belong to the Victorian Poets.
A. T. S. Eliot
B. Alfred Tennyson
C. Robert Browning
D. Matthew Arnold
标准解：
4. Under Margaret Thatcher’s administration, Britain experienced （）.
A. economic recession
B. economic expansion
C. economic decline
D. economic depression
标准解：
5. The flag of the United Kingdom, known as the Union Jack, is made up of （）crosses.
A. one
B. two
C. three
D. four
标准解：
6. What are the names of the two largest islands along the western coast of Ireland?
A. the Achill and Dundalk Island
B. the Achill and the Aran Island
C. the Dundalk and Dublin Island
D. the Dundalk and the Aran Island
标准解：
7. （）has replaced the Easter Bunny as the symbol of Easter in Australia.
A. The Easter Kangaroo
B. The Easter Platypus
C. The Easter Koala
D. The Easter Bilby
标准解：
8. Normally, it will take （）years to get an undergraduate degree.
A. 3
B. 4
C. 5
D. 2
标准解：
9. Who invaded and conquered Britain for the first time in 55 BC（）?
A. Emperor Claudius
B. Julius Caesar
C. King Alfred
D. King Ethelred
标准解：
10. The British Isles are made up of（）.
A. two large islands and hundreds of small ones
B. two large islands and Northern Ireland
C. three large islands and hundreds of small ones
D. three large islands and Northern Ireland
标准解：
11. Ireland also has a small indigenous minority known as （）.
A. Celtic
B. Travelers
C. Normans
D. Vikings
标准解：
12. When does the world's most famous tennis tournament Wimbledon begin?
A. on the nearest Friday to June 22
B. on the nearest Monday to June 22
C. on the nearest Tuesday to June 22
D. on the nearest Saturday to June 22
标准解：
13. “If Winte r comes, can Spring be far behind!”is an epigrammatic line by （）.
A. J. Keats
B. W. Blake
C. W. Wordsworth
D. P. B. Shelley
标准解：
14. What are the three colors that constitute the Republic of Ireland's national flag?
A. orange, white and green
B. orange, green and blue
C. white, green and red
D. white, blue and green
标准解：
15. Which one is not considered as the most famous boarding private schools in Britain?
A. Eton College
B. Harrow School
C. Woodland Junior School
D. Rugby School
标准解：
16. Since 1991, how many women presidents have the Irish elected?
A. two
B. three
C. four
D. none
标准解：
17. What are the two official languages in Ireland?
A. Irish and Gaelic
B. English and Ulster-Scots
C. English and Gaelic
D. Irish and Ullans
标准解：
18. Who made harp the official symbol of colonial Ireland in the 16th century?
A. Queen Victoria of England
B. Queen Elisabeth I of England
C. King Henry VII of England
D. King Henry VIII of England
标准解：
19. （）was the first Australian to win a Nobel Prize in literature.
A. Henry Lawson
B. Adam Lindsay Gordon
C. Patrick White
D. Kylie Tennant
标准解：
20. England's National Day is （）.
A. St George's Day, 1 March
B. St George's Day, 23 April
C. New Year's Day. 1 Jan
D. Christmas, 25 Dec
标准解：
《英语国家概况(二)》16秋在线作业2
二、判断题（共20 道，共50 分。）
1. The longest river in Britain is River Thames.
A. 错误
B. 正确
标准解：
2. The official name of UK is the United Kingdom of Great Britain and Northern Ireland.
A. 错误
B. 正确
标准解：
3. On the island of Great Britain, there are four political divisions—England, Scotland, Wales and Ireland
A. 错误
B. 正确
标准解：
4. The once typical British family headed by two parents has undergone substantial changes during the nineteenth century.
A. 错误
B. 正确
标准解：
5. The official name of UK is the United Kingdom of Great Britain and Northern Ireland.
A. 错误
B. 正确
标准解：
6. Wellington, the capital of New Zealand, is a city with the largest population.
A. 错误
B. 正确
标准解：
7. There are steady development in the 50s and 60s, economic recession in the 70s and economic recovery in the 80s.
A. 错误
B. 正确
标准解：
8. The UK lies in the North Atlantic Ocean off the north coast of Europe.
A. 错误
B. 正确
标准解：
9. New Zealand holds a special position in the world in that it has two national anthems.
A. 错误
标准解：
10. Members of Parliament (MPs) are those who inherit the noble titles.
A. 错误
B. 正确
标准解：
11. Education in Britain is compulsory for children aged from 5 to 16.
A. 错误
B. 正确
标准解：
12. The majority of traditional English poems were written in iambic pentameter..
A. 错误
B. 正确
标准解：
13. The Merlion has been erected as a symbol to welcome all visitors to Singapore.
A. 错误
B. 正确
标准解：
14. Singaporeans take pride in having the cleanest city in the world.
A. 错误
B. 正确
标准解：
15. Mrs. Thatcher's government took numerous measures to improve the efficiency of the economy during the past decade, using both macroeconomic and microeconomicpolicies.
A. 错误
B. 正确
标准解：
16. Britain is home of the world's largest foreign exchange market and the world's richest football club—Manchester United.
A. 错误
B. 正确
标准解：
17. The majority of traditional English poems were written in iambic pentameter.
A. 错误
B. 正确
标准解：
18. Marriage is legal at age 18 in Britain.
A. 错误
B. 正确
标准解：
19. The River Shannon is the longest river in both Ireland and Britain, and has influenced the military, social and economic history of Ireland.
A. 错误
B. 正确
20. Each part of the United Kingdom has the same Saint's Day.
A. 错误
B. 正确
标准解：
东财《大学英语1》在线作业一1答案
东财《大学英语1》在线作业一-0027 试卷总分:100 得分:0 一、单选题(共20 道试题,共60 分) 1.The lecture series _______ into three parts. https://www.wendangku.net/doc/509148143.html,es B.goes C.falls D.divides 正确答案:C 2.The thief helped _______ to our family silver. A.he B.him C.his D.himself 正确答案:D 3.We cannot communicate with the French guests because ______we ______ he speaks French. A.neither or B.either nor C.neither nor D.either or 正确答案:C 4.The film is ____ a best-selling novel. A.based on B.taken on C.brought on D.picked up 正确答案:A 5. His dream will ______ sooner or later. https://www.wendangku.net/doc/509148143.html,e by https://www.wendangku.net/doc/509148143.html,e t rue https://www.wendangku.net/doc/509148143.html,e over https://www.wendangku.net/doc/509148143.html,e down 正确答案:B 6.Philip: Mother, I feel like another five minutes’ sleep.Mother: ________Get dressed.
A.Fast! B.Hello! https://www.wendangku.net/doc/509148143.html,e on! D.Anyway. 正确答案:C 7.Birds ______ grain and insects. A.work on B.carry on C.live on D.go on 正确答案:C 8.The work ______ he was devoted won high praise. A.to which B.to that C.in which D.in that 正确答案:A 9.I’m looking forward _______ you in the near future. A.to seeing B.to see C.seeing D.seen 正确答案:A 10. A reception party will be held in your ________ this evening. https://www.wendangku.net/doc/509148143.html, B.honor C.place D.position 正确答案:B 11.His supposition is good in theory _____ cannot be put into practice. A.and B.or C.but D.while
大学英语3阶段作业二
一、完形填空（共1道小题，共50.0分） 1.Once, three fishes lived in a pond. One evening, some ___1___ passed by the pond and saw the fishes. “This pond is full of fish”, they told each other __2___. “We have never fished here before. We must come back tomorrow morning with our ___3___ and catch these fish!” So saying, the fishermen left. When the eldest of the three fishes ___4___ this, he was troubled. He called the other fishes together and said, “Did you hear ___5___ the fishermen said? We must leave this pond at once. The fishermen will return tomorrow and kill us all!” The second of the three fishes agreed. “You are right”, he said. “We must leave the pond.” But the ____6___ fish laughed. “You are worrying without reason”, he said. “We have lived in this pond all our lives, and no fisherman has ever come here. Why should these men return? I am not going ___7____ - my luck will keep me safe.” The eldest of the fishes left the pond that ___8____ evening with his entire family. The second fish saw the fishermen ____9___ in the distance early next morning and left the pond at once with all his family. The third fish refused to leave even then. The fishermen ____10___and caught all the fish left in the pond. The third fish's luck did not help him - he too was caught and killed. (232字) a. A.fishersman B.fisherman C.fishermans D.fishermen 学生答案: D; 标准答 案: D b. A.excitedly B.excited C.excite D.exciting
13年秋东财《大学英语1》在线作业三.附百分答案
一、单选题（共 25 道试题，共 100 分。） V 1. They usually go for a walk in ______ with each other after supper. A. line B. pace C. time D. company 满分：4 分 2. Caller: Hi, is Jill there, please? Mary: __________ A. Hold on. I'll get her. B. No, she isn't here. C. Yes, she lives here. D. Yes, what do you want? 满分：4 分 3. I ______ great pity on the woman whose baby died. A. gave B. put C. based D. took 满分：4 分 4. Kelly: _________ Tony: I’m OK. A. How have you been? B. How do you do? C. Nice to meet you. D. Fancy meeting you here. 满分：4 分 5. There were forty people _______ yesterday’s meeting. A. attending
B. attended C. to attend D. attend 满分：4 分 6. His supposition is good in theory _____ cannot be put into practice. A. and B. or C. but D. while 满分：4 分 7. She advised that I _______ in bed for a few days. A. rested B. should rest C. must rest D. ought to rest 满分：4 分 8. Bob: Would you like a cigarette? Jason: No, thank you. I've given up smoking. Bob:_______ A. Ok. Go ahead and do it B. All right. Take care. C. Well, you don't mind if I have one, do you? D. Sorry, have another one then. 满分：4 分 9. Young ______ he is, he handles things skillfully. A. if B. though
东财《大学英语1》在线作业一答案
东财《大学英语1》在线作业一-0007 试卷总分:100 得分:100 一、单选题(共20 道试题,共60 分) 1.We cannot communicate with the French guests because ______we ______ he speaks French. A.neither or B.either nor C.neither nor D.either or 答案:C 2.As ________, he did not show up at the party. A.was expected B.would be expected C.had been expected D.expected 答案:C 3._________ the workers are unskilled. A.A number of B.A quantity of C.An amount of D.The number of 答案:A 4.Honesty and hard work _______ to success and happiness. A.help B.contribute C.bring https://www.wendangku.net/doc/509148143.html,pare 答案:B 5.Mum: Let's go to the seaside some time during the weekend. Daughter: Great. What time? Mum: ______ A.Are you ready? B.You name it. C.During the weekend D.Take your time. 答案:B 6.Man: That's a beautiful hat you have on! Woman: _______. A.Actually, I don't like it very much. B.Yes, I think so.
大学英语三离线作业2答案
精品文档2离线作业试卷列表 一、单选 - Would you be interested in seeing a film t15分）小题；每小题3分，满分第一部分：交际用语（共1.5C3分值：onight?- __________ B. Are you sure? A. Not at all. D. You're welcome. C. Great! I'd love to - Excuse me, could you tell me the way to Pe分）3分，满分15第一部分：交际用语（共2.5小题；每小题B3分值：______ ople's Square?- ____ B. Sorry, I'm a stranger here. A. I don't understand you. D. Don't bother me. C. Why don't you take a taxi? C 1分值：小题；每小题1分，满分10分）请点击此链接查看题目30 第四部分：完形填空（共3.10 B. in heart A. on mind D. on your mind C. in mind B1分值：104.第四部分：完形填空（共10小题；每小题1分，满分分）请点击此链接查看题目29 B. for A. with C. to D. in B1分值：分）小题；每小题5.第四部分：完形填空（共101分，满分10请点击此链接查看题目28 B. wonderful A. impossible D. practical C. incapable - I've got the first prize in the dancing co5第一部分：交际用语（共小题；每小题分）153分，满分6._C3分值：ntest.- _________ A. You're welcome. B. It's very kind of you. D. Oh, really, I can't believe my ears. C. Please accept my congratulations. 精品文档． 精品文档D分_______ 15分）- I've passed the examination.- ___7.第一部分：交际用语（共5小题；每小题3分，满分3值：
东财英语在线作业二题目及答案
回答错误 A: Single or two B: Single or return C: Single or double D: Single or back 答案: B A: That’s very kind of you B: Are you kidding Thank you anyway
C: You think so That’s encouraging D: I don’t believe it. You are flattering me 答案: C A: These oranges are for you B: Give you the oranges C: There you are D: Here are you 答案: C A: In B: On C: By
D: With 答案: D A: Their cakes are to strive for B: Their cakes are to struggle for C: Their cakes are to die for D: Their cakes are to pay for 答案: D A: forms B: are formed by C: in the form of D: form 答案:
D A: That’s very regretful B: That’s pitiful C: That’s too bad D: That’s worse 答案: C A: related B: relate C: relative D: relates 答案: A
东财《大学英语1》在线作业一及答案
请同学及时保存作业,如您在20分钟内不作操作,系统将自动退出。 东财《大学英语1》在线作业一及答案 试卷总分：100 测试时间：-- 单选题 一、单选题（共25 道试题，共100 分。）V 1. Woman: Does the rent include electricity bills? Landlord: ______ A. What a daydream you are having! B. It doesn't usually include the electricity bill. C. I don't think so, I'm afraid. D. I'm not sure. I'll ask if you don't mind. 满分：4 分 2. The professor made his students _______ their essays. A. rewrite B. to rewrite C. rewriting D. rewritten 满分：4 分 3. This article _____ of four parts. A. consists B. consist C. is consisted D. consisting 满分：4 分 4. Mum: Let's go to the seaside some time during the weekend. Daughter: Great. What time? Mum: ______ A. Are you ready? B. You name it. C. During the weekend. D. Take your time. 满分：4 分 5. I ______ great pity on the woman whose baby died. A. gave B. put C. based D. took 满分：4 分 6. Bill: Do you mind my smoking here?Jane: _________ A. No,thanks. B. Yes,I do. C. Yes.I’d rather not.
机械原理第一次作业
1、在曲柄摇杆机构中，若以曲柄为原动件时，最小传动角γmin可能出现在曲柄与机架两个共线位 置之一处。对 2、摆动导杆机构不存在急回特性。错 3、凡曲柄摇杆机构，极位夹角θ必不等于0，故它总具有急回特征。错 4、在铰链四杆机构中，如存在曲柄，则曲柄一定为最短杆。错 5、图示铰链四杆机构ABCD中，可变长度的a杆在某种合适的长度下，它能获得曲柄摇杆机构。错 6、平面四杆机构有无急回特性取决于极位夹角是否大于零。对 7、任何平面四杆机构出现死点时，都是不利的，因此应设法避免。错 8、在曲柄滑块机构中，只要原动件是滑块，就必然有死点存在。对 9、在铰链四杆机构中，凡是双曲柄机构，其杆长关系必须满足：最短杆与最长杆杆长之和大于其它 两杆杆长之和。错 10、铰链四杆机构是由平面低副组成的四杆机构。对 11、平面连杆机构中，从动件同连杆两次共线的位置，出现最小传动角。错 12、任何一种曲柄滑块机构，当曲柄为原动件时，它的行程速比系数K=1。错 13、在单缸内燃机中若不计运动副的摩擦，则活塞在任何位置均可驱动曲柄。错 14、曲柄摇杆机构只能将回转运动转换为往复摆动。错 15、转动导杆机构中不论取曲柄或导杆为原动件,机构均无死点位置。对 16、增大构件的惯性，是机构通过死点位置的唯一办法。错 17、当曲柄摇杆机构把往复摆动运动转变成旋转运动时，曲柄与连杆共线的位置，就是曲柄的“死点” 位置。对 18、在摆动导杆机构中，若取曲柄为原动件时，机构无死点位置；而取导杆为原动件时，则机构有两 个死点位置。对 19、平面四杆机构的传动角在机构运动过程中是时刻变化的，为保证机构的动力性能，应限制其最小 值γmin不小于某一许用值[γ ]。对 20、偏置曲柄滑块机构中，若以曲柄为原动件时，最小传动角γmin能出现在曲柄与滑块的导路相平 行的位置。错 21、当机构的自由度F>0，且原动件数，则该机构即具有确定的相对运动。b. 等于 22、铰链四杆机构中存在曲柄时，曲柄是最短构件。b. 不一定 23、当四杆机构处于死点位置时，机构的压力角_______。c. 为90o 24、连杆机构行程速比系数是指从动杆反、正行程。 C. 平均速度的比值 25、在曲柄摇杆机构中，当曲柄为主动件，且共线时，其传动角为最小值。 c. 曲柄与机架 26、对心曲柄滑块机构以曲柄为原动件时，其最大传动角为。b. 90° 27、设计连杆机构时，为了具有良好的传动条件，应使。正确答案是：传动角大一些，压力角小一些
大学英语三作业二
第一部分：交际用语（共5小题；每小题3分，满分15分） 1- Would you be interested in seeing a film tonight? - ___C Not at all. Are you sure? Great! I'd love to You're welcome. 2- Excuse me, could you tell me the way to People's Square? - ____B______ I don't understand you. Sorry, I'm a stranger here. Why don't you take a taxi? Don't bother me. 3- I've got the first prize in the dancing contest. - ______C____ You're welcome. It's very kind of you. Please accept my congratulations. Oh, really, I can't believe my ears. 4- I've passed the examination. - _____D_____ What a pity! I have the examination. Come on. Congratulations. 5- I'm suffering from a stomachache. - ______A____ Are you feeling better? Why are you here?
东财英语1在线作业二题目和答案2
1、Clerk: Good morning. Can I help you？ Mr. Smith: Yes, I’d like a ticket to New York 9:15 tomorrow morning.？ Clerk: _______？ Mr. Smith: Single, please？ 回答错误 A: Single or two B: Single or return C: Single or double D: Single or back 答案: B 有疑问去论坛 2、Jane: Carol, you look very well.？ Carol: Thank you, Jane. You look Wonderful too. Your weekend tennis must have done you gooD.？ Jane: ________.？ 回答正确 A: That’s very kind of you B: Are you kidding Thank you anyway C: You think so That’s encouraging D: I don’t believe it. You are flattering me 答案: C 有疑问去论坛
3、Salesgirl: Good morning, miss. Can I help you？ Mary: Yes, I’d like half a kilo of oranges, please.？ Salesgirl:________. Anything else？ Mary: No, thank you.？ 回答错误 A: These oranges are for you B: Give you the oranges C: There you are D: Here are you 答案: C 有疑问去论坛 4、____ three days to go before the final exams, shouldn’t you work harder？回答正确 A: In B: On C: By D: With 答案: D 有疑问去论坛
东财英语1在线作业二题目及答案2
?
1、 Clerk: Good morning. Can I help you? Mr. Smith: Yes, I’d like a ticket to New York 9:15 tomorrow morning. Clerk: _______? Mr. Smith: Single, please
回答错误
A: Single or two
B: Single or return
C: Single or double
D: Single or back
答案: B
?
有疑问去论坛
?
2、 Jane: Carol, you look very well. Carol: Thank you, Jane. You look Wonderful too. Your weekend tennis must have done you gooD. Jane: ________.
回答正确
A: That’s very kind of you
B: Are you kidding? Thank you anyway
C: You think so? That’s encouraging
D: I don’t believe it. You are flattering me
答案: C
?
有疑问去论坛
?
3、 Salesgirl: Good morning, miss. Can I help you? Mary: Yes, I’d like half a kilo of oranges, please. Salesgirl:________. Anything else? Mary: No, thank you.
回答错误
A: These oranges are for you
B: Give you the oranges
C: There you are
D: Here are you
答案: C
?
有疑问去论坛
?
4、 ____ three days to go before the final exams, shouldn’t you work harder?
回答正确
机械原理第2章习题答案
2-1 绘制题图2-1所示各个平面机械实体的机构运动示意图（无精确尺寸的比例要求）。 手摇打气筒汽车发动机罩壳泵手动冲孔机 1 颚式破碎机偏心轮传动机构水泵 折叠椅 开关窗机构夹钳剪刀式千斤顶 题图2-1 解：
2-4 在题图2-4所示的铰链四杆机构中，已知l AB =50mm ，l BO 1=35mm ，l O 1O 3 =30mm ，取O 1O 3为机架。 （1） 如果该机构能成为曲柄摇杆机构，且O 1A 是曲柄，求l AO 1的取值范围； （2） 如果该机构能成为双曲柄机构，求l AO 1的取值范围； （3） 如果该机构能成为双摇杆机构，求l AO 1的取值范围。 A B 1O 3 O 题图2-4 答：(1) l AO115mm (2) 45mm l AO155mm (3) 15mm< l AO1<45mm 或55< l AO1<115 2-5 在题图2-5所示的铰链四杆机构中，各杆件长度分别为l AB =28mm ，l BC =70mm ，l CD =50mm ， l AD =72mm 。若取AB 为机架，该机构将演化为何种类型的机构为什么请说明这时C 、D 两个转 动副是周转副还是摆转副 A B C 题图2-5 答：由于28+72 < 70+50，因此存在曲柄，又因为AB 为最短杆，故若取AB 为机架，该机构将演化为为双曲柄机构。这时C 、D 均为摆转副。 2-6 试推导有无偏置条件下，曲柄滑块机构中的曲柄存在条件。已知曲柄长为a ，连杆长为 b ，偏置为e 。 答：无偏置时，曲柄存在的条件是a b ；有偏置时，曲柄存在的条件是a +e b 。
川大《大学英语(三)》第二次作业答案
首页 - 我的作业列表 - 《大学英语（三）》第二次作业答案 你的得分：100.0 完成日期：2014年01月19日16点27分 说明：每道小题括号里的答案是您最高分那次所选的答案，而选项旁的标识是标准答案。 一、单项选择题。本大题共30个小题，每小题2.5 分，共75.0分。在每小题给出的选项中，只有一项是符合题目要求的。 1. —Would you like to go skating with me? —________________. ( C ) A.Yes, I think so B.No, thanks C.Yes, I'd love to D.I'm afraid not 2. —Would you like something to drink? What about a cup of tea? —________________ ( A ) A.No, thanks. B.No, I wouldn't. C.Yes, I want. D.Yes, I like. 3. —Hello, may I have an appointment with the headmaster? —________________. ( C ) A.Sorry, I don't know you B.No, you can't C.Certainly. Wait a minute, please D.Let me see 4. —Why not join us in the game? —________________. ( A ) A.OK! I'm coming
18春东财《大学英语1》在线作业三
------------------------------------------------------------------------------------------------------------------------------ (单选题) 1: This is the house ______ I used to live. A: which B: where C: when D: in where 正确答案: (单选题) 2: He's trying to _____ a way to solve the problem. A: figure out B: make out C: get out D: find out 正确答案: (单选题) 3: Mum: Let's go to the seaside some time during the weekend. Daughter: Great. What time? Mum: ______ A: Are you ready? B: You name it. C: During the weekend D: Take your time. 正确答案: (单选题) 4: It's no use ______ over spilt milk. A: to cry B: crying C: cry D: cries 正确答案: (单选题) 5: He prides _____ on being a member of a good family. A: himself B: he C: him D: his 正确答案: (单选题) 6: Leo: Unbelievable! I have failed the test again!Martha: _____________ This is not the end of the world. A: Good luck. B: Cheer up. C: Go ahead. D: No problem. 正确答案: (单选题) 7: High prices ______ low sales. A: go to B: lead to C: come to
机械原理第二章第三章课后答案
第2章 2-1 何谓构件何谓运动副及运动副元素运动副是如何进行分类的 答：参考教材5~7页。 2-2 机构运动简图有何用处它能表示出原机构哪些方面的特征 答：机构运动简图可以表示机构的组成和运动传递情况，可进行运动分析，而且也可用来进行动力分析。2-3 机构具有确定运动的条件是什么当机构的原动件数少于或多于机构的自由度时，机构的运动将发生什么情况 答：参考教材12~13页。 2-4 何谓最小阻力定律试举出在机械工程中应用最小阻力定律的1、2个实例。 2-5 在计算平面机构的自由度时，应注意哪些事项 答：参考教材15~17页。 2-6 在图2-20所示的机构中，在铰链C、B、D处，被连接的两构件上连接点的轨迹都是重合的，那么能说该机构有三个虚约束吗为什么 答：不能，因为在铰链C、B、D中任何一处，被连接的两构件上连接点的轨迹重合是由于其他两处的作用，所以只能算一处。 2-7 何谓机构的组成原理何谓基本杆组它具有什么特性如何确定基本杆组的级别及机构的级别 答：参考教材18~19页。 2-8 为何要对平面高副机构进行“高副低代"“高副低代”应满足的条件是什么 答：参考教材20~21页。 2-9 任选三个你身边已有的或能观察到的下列常用装置(或其他装置)，试画出其机构运动简图，并计算其自由度。1)折叠桌或折叠椅；2)酒瓶软木塞开盖器；3)衣柜上的弹簧合页；4)可调臂台灯机构；5)剥线钳；6)磁带式录放音机功能键操纵机构；7)洗衣机定时器机构；8)轿车挡风玻璃雨刷机构；9)公共汽车自动开闭门机构；10)挖掘机机械臂机构；…。 2-10 请说出你自己身上腿部的髋关节、膝关节和踝关节分别可视为何种运动副试画出仿腿部机构的机构运动简图，并计算其自由度。 2-11图示为一简易冲床的初拟设计方案。设计者的思路是：动力由齿轮j输入，使轴A连续回转；而固装在轴^上的凸轮2与杠杆3组成的凸轮机构使冲头4上下运动，以达到冲压的目的。试绘出其机构运动简图(各尺寸由图上量取)，分析是否能实现设计意图，并提出修改方案。 1)取比例尺绘制机构运动简图 2)分析是否能实现设计意图 解： 不合理∵，可改为 2-12图示机构为一凸轮齿轮连杆组合机构，试绘制其机构示意简图并计算自由度。 解： 2-16试计算图示凸轮-连杆组合机构的自由度 （a） 解： A为复合铰链 （b） 解：（1）图示机构在D处的结构与图2-1所示者一致，经分析知该机构共有7个活动构件，8个低副(注意移动副F与F’，E与E’均只算作一个移动副)，2个高副；因有两个滚子2、4，所以有两个局部自由度，没有虚约束，故机构的自由度为 F=3n- (2p l+p h- p’)- F’=3ⅹ7- (2ⅹ8+2-0)- 2=1 （2）如将D处结构改为如图b所示形式，即仅由两个移动副组成。注意，此时在该处将带来一个虚约束。因为构件3、6和构件5、6均组成移动副，均要限制构件6在图纸平面内转动，这两者是重复的，故其中有一个为虚约束。经分析知这时机构的活动构件数为6，低副数为7，高副数和局部自由度数均为2，
2015年大学英语(三)第二次作业
问题1 得2 分，满分2 分 1、--What does your father do? -- ___________. 答案 所选答案： C. C：He is a farmer 问题2 得2 分，满分2 分 2、-- How are you today? --___________, thank you. 答案 所选答案： A：Fine 问题3 得2 分，满分2 分 3、- _______ - You too! 答案 所选答案： A：Merry Christmas! 问题4 得2 分，满分2 分 4、- Good-bye for now. - _________ 答案 所选答案： C：See you. 问题5 得2 分，满分2 分 5、--Excuse me, could you tell me how to get to the post office? -- _____________. 答案 所选答案： D：Sorry, but I am a stranger here myself
问题6 得2 分，满分2 分 6、- How do I get to the cinema? - _________ 答案 所选答案： D：Go down this street and turn left. 问题7 得2 分，满分2 分 7、- Is it possible for you to work late tonight? - _______ 答案 所选答案： D：I think so. 问题8 得2 分，满分2 分 8、-- May I use your bike for a moment? -- ________ 答案 所选答案： C：By all means. 问题9 得2 分，满分2 分 9、-- Congratulations! You won the first prize in today's speech contest. -- ________ 答案 所选答案： C：Thank you. 问题10 得2 分，满分2 分 10、- How are you, Bob? - _______ 答案 所选答案： B：I'm fine. Thank you 问题11 得2 分，满分2 分 11、-- Would you like to go to the concert with us this evening? -- ________ 答案 所选答案： B：I'd love to, but I'm busy tonight. 问题12 得2 分，满分2 分
16年秋东财《大学英语2》在线作业答案
2. A：Can I do anything for you B：______ A. No. You can't do anything for me. B. No，it's alright. I can manage myself. C. Never mind. D. It's my pleasure 正确答案： B 3. Guest: Oh, it's ten o'clock. I'd better go now. Host: __ ____ A. OK. Please walk slowly. B. Why do you want to go now Don't you wan t to stay C. Yeah, it's really late. Why not immediately D. Won't you stay for another cup of coffee 正确答案： D 4. Niu Lang ______ his lonely and poor life with an old cow, his only friend. A. resided B. inhabited C. lived D. dwelt 正确答案： C 5. The good service at the hotel _____ the poor food to some extent.. A. made up for B. made up C. made for D. made out 正确答案： A 6.Desk Clerk：Good afternoon，Holiday Inn. Customer：Hello，I'd like to book a double room for the nights of 23rd and 24th p lease. Desk Clerk：______ A. What's the matter B. Just a minute, please C. What can I do for you D. Can I help you
微机原理第2章作业
第2章习题与思考题 4、下列各种情况下应判定哪个标志位并说明其状态： ①比较两个无符号数是否相等。ZF=1相等，反之不相等。 ②两个无符号数相减后比较大小。CF=0被减数≥减数，CF=1被减数<减数。 ③两数运算后结果是正数还是负数。SF=0结果为正，反之为负。 ④两数相加后是否产生溢出。OF=1结果溢出，反之不溢出。 5.简述8086系统中物理地址的形成过程。8086系统中的物理地址最多有多少 个？逻辑地址呢？ 答：①8086的地址加法器用来合成20位物理地址的，合成方法： 物理地址=段地址×16 +偏移地址， ②物理地址最多有220=1048576个 ③一个PA可对应多个逻辑地址。如：10145H可对应 10100H+45H 也可对应 10140H+05H等等。因此，逻辑地址难以计数。 6.8086系统中的存储器为什么要采用分段？有什么好处？ 答：①把1MB存储器分段，使每段最大可寻址64KB，这样段内地址可用16位表示，8086的地址寄存器便可使用。 ②而且为信息按特征分段存贮带来了方便。 9.在某系统中，已知当前（SS）=2360H，（SP）=0800H，请说明该堆栈段在存 储器中的物理地址范围。若往堆栈中存有20个字节数据，那么SP的内容为什么值？ 答：①该堆栈段在存储器中的物理地址范围： 23600H~23E00H（23600H~23600+0800H） ②若往堆栈中存有20个字节数据，SP=0800H–14H=07ECH 10.已知当前数据段位于存储器的B4000H~C3FFFH范围内，则DS段寄存器的内 容为多少？ 答：DS=B400H 11.8086系统中为什么一定要有地址锁存器？需要锁存哪些信息？
答案-大学英语三第二次作业答案
1. — ____________________ — Well, they got there last Wednesday. So about a week. 所选答案： A. How long have your parents been in Paris? — Could I speak to Mr. Lee, please? —____________. 所选答案： D. Speaking, please. —Doctor, I don’t feel well. —_____________. 所选答案： C. What’s the matter? — Shall we have roast chicken or ham sandwich? — _____________________. 所选答案： A. I’d rather have beef stew. — Madam, do all the buses go downtown? — ___________________. 所选答案： A. Sorry, I’m new here. Passage 1 When you turn on the radio, you hear an advertisement. When you watch television, you hear and see an advertisement. If you turn the pages of a newspaper or magazine, again you find an advertisement. If you walk down the street, you see one advertising board after another. All day, every day, people who