华东师范大学期末试卷(b闭卷)_
华东师大-线性代数样卷
华东师范大学期末试卷(样卷)2013 — 2014 学年第一学期课程名称：线性代数A学生姓名：学号：专业：计算机科学与技术年级/班级：课程性质：专业必修题号一二三四五六总分阅卷人签名分值25 20 19 12 12 12 100得分一、判断并简要说明理由。
（每题5分）1．全体n阶实反对称矩阵V1依照矩阵的加法与数乘构成实数域上的线性空间。
2．若A是正交矩阵，且|A|=1，则E-A不可逆。
3．设是实线性空间V上的一组基，A是V上的线性变换，A是A在基下的矩阵，若A可逆，则A，A，…，A也是一组基。
4．若是矩阵A的两个特征值，是对应的特征向量，则也是A的特征向量。
5．实正定矩阵都可以相似对角化。
二、计算。
（每题5分）1．已知，求一组非零向量，使得两两正交。
2．设，求|A10-5A9|。
3．设A是实对称矩阵，tE+A是正定矩阵，求t 的取值范围。
4．在中，定义线性变换A，。
求A在下的矩阵。
三、在P[x]4中取两组基：和1．求有前一组基到后一组基的过渡矩阵。
（4分）2．求在两组基下坐标相同的向量。
（5分）3．求微分变换D在基下的矩阵。
（5分）4．求D()在基下的坐标。
（5分）四、已知p=是矩阵对应的一个特征向量，1．求参数a,b及特征向量p对应的特征值。
（6分）2．问A能相似对角化吗？说明理由。
（6分）五、已知二次型1．写出二次型f的矩阵A。
（2分）2．求非退化的线性代换X=CY，把二次型f化为规范标准形。
（9分）3．计算二次型f的正惯性指数（1分）六、设1．证明：若λ是A的特征值，则p= (1,λ,λ2,λ3)T是对应λ的特征向量。
（6分）2．若A的特征值两两互异，求可逆矩阵P，使得P-1AP为对角矩阵。
（6分）。
华东师范大学末试卷(概率论与数理统计)复习题
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2022年华东师范大学软件工程专业《操作系统》科目期末试卷A(有答案)
2022年华东师范大学软件工程专业《操作系统》科目期末试卷A（有答案）一、选择题1、（）不是操作系统的功能。
A.CPU管理B.存储管理C.网络管理D.数据管理2、计算机开机后，操作系统最终被加载到（）。
A.BIOSB.ROMC.EPROMD.RAM3、要实现两个进程互斥，设一个互斥信号量mutex.当mutex为0时，表示（）。
A.没有进程进入临界区B.有一个进程进入临界区C.有一个进程进入临界区，另外一个进程在等候D.两个进程都进入临界区4、与单道程序相比，多道程序系统的优点是（）I.CPU 利用率高II.系统开销小III.系统吞吐量大IV. I/O设备利用率高A.仅I、IIIB.仅I、IVC. 仅II、IIID.仅I、III，IV5、为多道程序提供的共享资源不足时，可能会产生死锁。
但是，不当的（）也可能产生死锁。
A.进程调度顺序B.进程的优先级C.时间片大小D.进程推进顺序6、下列关于SPOOLing技术的叙述中，错误的是（）A.需要外存的文持B.需要多道程序设计技术的支持C.可以让多个作业共享一台独占设备D.由用户作业控制设备与输入/输出之间的数据传送7、用户程序发出磁盘1/0请求后，系统的正确处理流程是（）A.用户程序→系统调用处理程序→中断处理程序→设备驱动程序B.用户程序→系统调用处理程序→设备驱动程序→中断处理程序C.用户程序→设备驱动程序→系统调用处理程序→中断处理程序D.用户程序→设备驱动程序→中断处理程序→系统调用处理程序8、已知某磁盘的平均转速为r秒/转，平均寻找时间为T秒，每个磁道可以存储的字节数为N，现向该磁盘读写b字节的数据，采用随机寻道的方法，每道的所有扇区组成一个簇，其平均访问时间是（）。
A.（r+T）b/NB.b/NTC.（b/N+T）D.bT/N+r9、某文件系统的簇和磁盘扇区大小分别为1KB和512B。
若一个文件的大小为1026B，则系统分配给该文件的磁盘空间大小是（）。
上海市华东师范大学第二附属中学2023-2024学年高二下学期期末考试语文试卷(含解析)
⑤父亲招呼北山叔洗罢脸，领着北山叔进了堂屋。接下来，父亲高喉咙大嗓门吩咐着姐姐给北山叔倒茶，他从堂屋柜盖上拿过装烟叶的木匣子，给北山叔装一锅旱烟，又给自己装一锅，然后点着火，两个人坐在炕沿边吧嗒吧嗒吃起了老旱烟。父亲的过分殷勤，使得北山叔好像有些不大自然，他像我们村庄里那些头一回去人家里做亲戚的新女婿们一样，手足无措，屁股浅浅担在炕沿边，在父亲几次叮嘱后，才脱下鞋，坐到了炕头上。
②米勒教授认为有两种答案：一种是他提出的“错时阅读”理论，指的是阅读过去时代的作品时，比如简·奥斯丁等，尽量让自己仿佛身处18世纪，生活于其中，了解关于这一文化的一切。当年他的老师就是这么教阅读的。对此米勒教授本人是持怀疑态度的，因为对于读者来说，他们更想知道的是《傲慢与偏见》对我们有什么意义，在今天有什么价值。所以米勒教授认为这与讨论小说在其原有的历史语境中的意义是截然不同的两个问题。倘若我们想读懂伊丽莎白时代的作品，是不是应该读读蒂利亚德的《伊丽莎白时代的世界图景》才能用他们的思维方式思考问题？米勒的回答是：“我本人可不愿意像他们那样思考，我也做不到搁置我们的现代图景。”我们今天阅读先前时代作品时必然带着媒体已经改变的意识。这就意味着我们在阅读《米德尔马契》时与它刚发表时的读者是截然不同的。他们无法想象未来的媒体会发生什么样的变化，而了解新媒体给我们带来阅读《米德尔马契》时的特别视角，让我们更容易看到以印刷为媒介的小说在哪些方面限制了小说本身意义的可能性。
⑩母亲沉着脸，站在锅根，身子动都没动。父亲凑过脸，软着声，用平日里绝没有的乞求语气说：“就下一小把吧。”厨房里一阵风箱吧嗒吧嗒响，不一会，母亲笑吟吟端着过年待客的木盘进了堂屋。木盘里，是四碗冒着热气，汤面上缀着绿生生蒜苗漂菜、红艳艳油泼辣子的清汤挂面。
上海市华东师范大学第二附属中学2023-2024学年高一下学期期末考试数学试卷(含答案)
华东师范大学第二附属中学2023-2024学年高一下学期期末考试数学试卷一、填空题（第1—6题每题4分，第7—12题每题5分，满分54分）1. 是第_____________象限角，2. 复数_____．3. 函数的最大值是______.4. 已知，且，则______．5. 已知是实系数方程一个虚根，则______．6. 已知等比数列满足，，则______．7. 已知，则在上的数量投影是______．8. 在中，，则______．9. 已知复数z 满足，则的最大值为___________.10. 等差数列前项和分别是，若，则______．11. 若函数在上严格减，则正实数的取值范围是______．12. 已知平面向量，，，，满足，，，则最大值为______.二、选择题（本大题共4题，满分20分）13. “”是“是纯虚数”（ ）条件A. 充分不必要B. 必要不充分C. 既不充分也不必要D. 充要14. 若不平行，则下列向量中不能作为平面的一个基底是（ ）A. 与B. 与C. 与D. 与的的的的20242(1i)+=3sin 4cos y x x =+()()1,3,2,a b k == a b ⊥k =12024i +20x px q ++=p ={}n a 134a a +=246a a +=35a a +=()()3,4,2,1a b == a bABC V 36,5,cos 5b c bc A +====a 34i 2z ++≤z {}{},n n a b n ,n n S T 542n n S n T n +=+44a b =()sin 0y x ωω>=3π,π4⎡⎤⎢⎥⎣⎦ω1e 2e 3e p 1231e e e ===u r u r u r 120e e ⋅= 1p ≤r ()()12p e p e -⋅-+u r u r r r ()()()()2331p e p e p e p e -⋅-+-⋅-u r u r u r u r r r r r 1m =()()2322i z m m m =-++-12,e e 12e e + 12e e - 122e e + 122e e + 123e e - 2126e e - 2e 12e e +15. 在中，，则（ ）A. B. C. 或 D. 以上答案均不正确16. 已知是定义在复数集上的次实系数多项式（是正整数），给出下列两个命题：①如果虚数是的根，即，那么也是的根，即；②可以因式分解成若干一次或二次实系数多项式的乘积；则下列说法正确的是（ ）A. 命题①②都是真命题B. 命题①②都是假命题C. 命题①是真命题，命题②是假命题D. 命题①是假命题，命题②是真命题三、解答题（本大题共有5题，满分76分）17. 已知函数.（1）求的最小正周期和单调递增区间.（2）当时，求的最值.18. 在数列中，已知．（1）求的通项公式；（2）计算：．19. 在复数范围解方程．（1）关于的实系数一元二次方程的两根满足的值；（2）关于的实系数一元二次方程的两根，请根据实数的不同取值范围讨论的值．20. 在中，，平面上点满足，，动点在线段上（不含端点）．（1）设，用含有的式子表示；的ABC V 53sin ,cos 135A B ==cos C =56651665-56651665-()()11100,R,0,1,,n n n n n i P z a z a z a z a a a i n --=++++≠∈= n n z ()P z ()0P z =z ()P z ()0P z =()P z 22()cos sin cos =-+f x x x x x ()f x 0,4x π⎡⎤∈⎢⎥⎣⎦()f x {}n a 11,11n n n a a a a +==+1n a ⎧⎫⎨⎬⎩⎭122320242025a a a a a a +++ x 220x x k ++=12,x x 12x x -=k x 220x x k ++=12,x x k 12x x +ABC V 3,4,60AB AC BAC ∠=== ,D E 23AD AB = 34A A E C = P DE ()01DP k DE k =<< ,,k AD AE AP（2）设，求的最小值；（3）求的最小值．21. 一个如果定义在上的函数使得，则称是一个元置换，可以用一个的数表来简单表示，例如表示一个4元置换，对于一个元置换和，按照的递推关系定义的数列称为关于生成的数列．（1）对于3元置换，直接写出2关于的生成数列的前四项；（2）给出两条新定义：①对于一个数列，如果存在正整数，使得对于任意正整数，都有，则称是一个周期数列，并称是的一个周期；②对于一个元置换，如果存在正整数，使得对任意，都是关于的生成数列的一个周期，则称是元置换的一个周期．对于5元置换，求的一个周期；（3）王老师有一个特制机关盒和一把特制钥匙，锁孔内部有10个互不相同的可移动的凹槽，钥匙上有10个对应的固定的齿，必须所有的齿与对应的凹槽同时匹配后，再按下开关，才能打开机关盒，钥匙每顺时针转动一圈，就会按照某个10元置换运作，将在第个位置的凹槽转移到第个位置上．机关盒原本处于打开状态，但一位贪玩的同学将机关盒关上后，又把钥匙顺时针转动了一圈，且操作不当弄坏了零件，导致钥匙只能继续顺时针转动，而且只有一次按下开关的机会，如果按下开关时所有的齿与凹槽没有匹配上，机关盒就会彻底报废．问：王老师还有办法打开机关盒吗？他要至少继续顺时针转动钥匙多少次，才能保证能打开机关盒？AP xAB y AC =+ 12xy +PB PC ⋅{}1,2,,m f ()()(){}{}1,2,,1,2,,f f f m m = f m 2m ⨯()()()1212m f f f f m ⎛⎫= ⎪⎝⎭12344213f ⎛⎫= ⎪⎝⎭()()()()14,22,31,43f f f f f ====：m f {}1,2,,a m ∈ ()11,1n n a f a n a a+⎧=≥⎨=⎩{}n a a f 123231f ⎛⎫= ⎪⎝⎭f {}n a {}n b T n n T n b b +={}n b T {}n b m f T {}1,2,,a m ∈ T a f {}n a T m f 1234525431f ⎛⎫= ⎪⎝⎭f f k ()f k ()110k ≤≤华东师范大学第二附属中学2023-2024学年高一下学期期末考试数学试卷 答案一、填空题（第1—6题每题4分，第7—12题每题5分，满分54分）【1题答案】【答案】三【2题答案】【答案】【3题答案】【答案】【4题答案】【答案】【5题答案】【答案】-2【6题答案】【答案】【7题答案】【答案】【8题答案】【答案】【9题答案】【答案】7【10题答案】【答案】##0.4【11题答案】【答案】【12题答案】【答案】2i523-92523107,,3232⎡⎤⎡⎤⎢⎥⎢⎥⎣⎦⎣⎦5+二、选择题（本大题共4题，满分20分）【13题答案】【答案】D【14题答案】【答案】C【15题答案】【答案】B【16题答案】【答案】A三、解答题（本大题共有5题，满分76分）【17题答案】【答案】（1）最小正周期为，单调递增区间为，；（2）最小值1，最大值为2.【18题答案】【答案】（1）；（2）【19题答案】【答案】（1）—1或3；（2）【20题答案】【答案】（1）； （2）； （3）【21题答案】【答案】（1）（2）（3）有办法，π,36k k ππππ⎡⎤-+⎢⎥⎣⎦Z k ∈n 202420251202,011k x x k k ⎧≤⎪+=<≤⎨⎪>⎩()1AP k AD k AE =-+ 496289112-2,3,1,262519。
英语(B)模拟卷B
华东师范大学成人高等教育（网络教育）专科公共课《英语（B）》模拟卷（B卷）考试形式：闭卷考试时间：90分钟学习中心：_________ 姓名：_________ 学号：_________ 成绩：_________注：答案统一做在答题纸上。
Part I 单选题（20%）（答案务必写在答题纸上）1. Will you please give me C more tea?A. muchB. littleC. someD. a little of2. It’s ten C from the school to my home.A. minute’s walkB. minutes’s walkC. minutes’ walkD. minute walk3. There are D seats in this cinema than in that one.A. manyB. moreC. muchD. more many4. When we got there, the meeting D for half an hour.A. has been onB. has onC. was onD. had been on5. The maths problem is so difficult that D of us can work it out.A. nobodyB. no oneC. allD. none6. He enjoys D football matches on TV.A. to watchB. watchC. watchedD. watching7. There are about A students in our school.A. eight hundredB. eight hundred ofC. eight hundredsD. eights hundred of8. Now it is difficult to A a job in our city.A. findB. find outC. look forD. search9. The young man promised to do D next time.A. a better workB. better worksC. better jobD. a better job10. When I finish these books, I’ll C to the library.A. give it backB. give to themC. give them backD. give back them11. Neither of the twins D clever, I’m afraid.A. aren’tB. areC. isn’tD. is12. I’ll give it to her as soon as she D back .A. comeB. cameC. will comeD. comes13. Is this the key B the door?A. ofB. toC. forD. from14. “What’s on the desk?”“_____D___ some glasses.”A. It isB. There isC. They areD. There are15. You can have fish meat, but you can’t have C .A. neither…nor…bothB. both…and…neitherC. either…or…bothD. either…or…neither16. She B has lunch at home on Sundays.A. don’tB. hardlyC. doesn’tD. not17. The population of China is larger than C of Japan.A. oneB. thoseC. thatD. these18. Half of the money C your brother.A. belong toB. belongC. belongs toD. belongs19. C good time they are having!A. WhatB. HowC. What aD. How a20. Mike knows D the questions in English.A. to answerB. answerC. how answerD. how to answer Part II 改错题(10%) (只需指出错处: A, B或C)1. If I meet him, I’ll give him a umbrella.A B C2. I haven’t got some money. Do you have some?A B C3. There are four tennis court in the hotel.A B C4. There is not some water in the cup.A B C5. Both Jane and Lorry dislike doing homeworks.A B C6. Do you have any ideas about how to help they?A B C7. We make a birthday gift for you yesterday.A B C8. A lot of peoples watch movies or films in their spare time.A B C9. She can works with computers, play football and cook meals.A B C10. I don’t buy any books for my friend yesterday.A B CIII. 阅读理解（40%）(1)Don’t take large amounts of cash with you. Traveler’s cheques are safer. Credit cards are accepted at most big shops.Maybe the biggest danger is from the pickpockets if you travel in the UK. It is a good idea to keep your traveler’s cheque, passport and your credit card in safe place. Other dangers include spending too much, eating too much, and of course, drinking too much whiskey in ScotlandThe emergency telephone number to call the police, ambulance or fire alarm is the same —you dial “999”. If you dial “999”, you have to tell the operator your address, telephone number and what service you want.You can find hotels in every town. The travel information services are very helpful and they offer free maps.(判断下列句子是否符合短文内容，符合的用“T”表示，不符合的用“F”表示)1. Don’t take large amounts of cash with you. T2. Credit cards are welcome at a few big shops. F3. Maybe the biggest danger to travelers in the UK is pickpockets. T4. Travelers must keep their traveler’s cheque, passport and credit cards in safeplace. F5. There are no other dangers to travelers in the UK. F(2)Scientists wanted to know more about the moon. They thought the best way was to send men to the moon.The moon is about 384,000 kilometers away from the earth. A plane can not fly to the moon because the air reaches only 240 kilometers away from the earth. But something can fly even when there is no air. That is a rocket.How does a rocket fly? There is gas in the rocket. When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket flyup into the sky.Rockets can fly far out into space. Rockets with men in them have been to the moon. Several rockets with men have flown to another planet much farther away than the moon. One day rockets may be able to go to any place in space.1. Scientists can be sent to the moon by B .A. planeB. rocketC. satelliteD. man-made satellite2. The earth is about 384,000 kilometers away from the A .A. moonB. universeC. starD. sun3. A plane cannot fly to the moon because B .A. there is no gas in the planeA.t he plane must driven by a manB.there is no air above 240 kilometers away from the earthC.it is smaller than a rocket4. The hot gas in the rocket is used for C .A. keeping the men in the rocket warmA.keeping the men in the rocket warmB.cooking foodC.making the rocket fly up5. D rockets may be able to go to any place in space.A. Some timeB. A dayC. AnytimeD. some day(3)Dick lived in England. In January he said to his wife, “I’m going to fly to New York next week, because I’ve got some work there.”“Where are you going to stay there?” his wife asked.“I don’t know yet,” Dick answered.“Please send me your address from there in a telegram, ” his wife said.“All right,” Dick answered.He flew to New York on January 3lst and found a nice hotel in the center of the city. He put his things in his room and then he sent his wife a telegram. He put the address of his hotel in it.In the evening he did not have any work, so he went to a cinema. He came out at nine o’clock and said, “Now I’m going to go back to my hotel and have a nice dinner.”He found a taxi, and the driver said, “Where do you want to go?” But Dick did not remember the name and address of his hotel.“Which hotel are my things in?” he said. “And what am I going to do tonight?” But the driver of the taxi did not know, so Dick got out and went into a telegraph office. There he sent his wife another telegram, and in it he wrote, “Please send me my address at this telegraph office.”1. Dick flew to New York because B .A.h e went there for a holidayB.he had work thereC.he went there for sightseeingD.h is home was there2. Why did his wife want a telegram from him ? Because C .A.s he did not know his address yetB.she wanted to go to New York tooC.she might send him another telegramD.s he couldn’t leave her husband by himself in New York3. Where did Dick stay in New York? BA. In the center of the city.B. In a hotelC. In a restaurant.D. At his friend’s house.4. Who will send him the name and address of his hotel? DA. The manager of his hotelB. The driver of the taxi.C. A telegraph officeD. His wife5. Which of the following is not true? CA.D ick stayed at a nice hotel in the center of the city.B.Dick did not work on the first night of his arrival.C.Dick forgot to send his wife a telegram.D.D ick wanted to go back to his hotel in a taxi.(4)A man was sent into prison. In the ward a prisoner asked. “Are you a thief, too?”“No, I’m a businessman,” the man answered, “I buy old cars at low prices, clean them and make them look like new ones. Then I sell them at high prices.”“What are you taken here for, then?”“Last night a young man drove a blue car to me. I bought for one hundred pounds.”“How cheap it was!”“Cheap? Half an hour later the police reached my shop and caught me.”“Oh. Was the car stolen?”“Even worse,” the man said in low spirits. “That was a police car.”1. In this story, the word “ward” is C .A. the gardenB. the gate of the prisonC. the house where prisoners live C. the back of the prison2. What was the man? DA. He was a trader.B. He was a murderer.C. He was a driver.D. He was a manager of a shop.3. When he bought the blue car for one hundred pounds, the man thought B .A.t he young man must be a thiefB.he could get much more money after he sold itC.he might be sent into prison soonD.h e shouldn’t sell it immediately4. When he bought the blue car at the low price, the man A .A.f elt very happyB.guessed it must be a police carC.felt that he would be found by the policeD.t hought he should give himself up to the police5. The writer tells us that A .A.t he man did a foolish thingB.the young man was a kind thiefC.the police had caught the true thiefD.t he police oughtn’t to put the man into prisonIV. 翻译（30%）(把下面整个段落翻译成中文)People can choose their favorite places to go and means of transport to travel in many ways. The travel industry offers a lot of nice services for the convenience and comfort of travelers. Travel guidebooks advise visitors what to see, wear and buy, which restaurant and hotels to go. Tourist offices of nations, states and cities list important sights for people to visit. Now people can travel almost any place in the world, even the outer space.人们可以选择自己喜欢的地方去旅行的交通工具在许多方面。
上海市华东师范大学第二附属中学2023-2024学年高二下学期期末物理试卷(解析版)
华东师大二附中2023学年第二学期期末考试卷高二物理（考试时间：60分钟 卷面满分：100分）一、振动和波（第1题3分，第2题4分，第3题4分，共11分）1. 小球（半径很小可忽略）在光滑的圆槽内作简谐振动，为了使振动周期变为原来的2倍，可采取的方法是（ ）A. 将小球质量减为原来的一半B. 将其振幅变为原来的2倍C. 将圆槽半径变为原来的2倍D. 将圆槽半径变为原来的4倍【答案】D【解析】【详解】小球受重力和支持力，支持力切向分量提供向心力，是类似单摆模型，根据单摆的周期公式周期与振幅、摆球的重力均无关，要使振动周期变为原来的2倍，可以将圆槽半径变为原来的4倍，ABC 错误，D 正确；故选D 。
2. 如图所示是产生机械波的波源О做匀速运动的情况，图中的圆表示波峰。
下列说法中正确的是（ ）A. 该图表示的是多普勒现象B. 此时波源正在向A 观测者靠近C. C 、D 两位观测者此时接收到的频率和波源发出的频率相等D. B 观测者此时接收到的频率小于波源发出的频率【答案】ABD【解析】【详解】A ．机械波波源О在匀速运动，当波源与观察者发生相对运动时，观察者接受到的频率发生改变，可知，该图表示的是多普勒现象，故A正确；的的2T =B ．根据图示可知，在相等时间内，A 观测者接受到的完整波数目增大，可知，观察者接受到的频率增大，则此时波源正在向A 观测者靠近，故B 正确；C ．题中图像具有对称性，结合上述可知，波源O 正在向A 观测者运动，则C 、D 两位观测者与波源均相对远离，则C 、D 两位观测者此时接收到的频率小于波源发出的频率，故C 错误；D ．结合上述可知，B 观测者与波源相对远离，则B 观测者此时接收到的频率小于波源发出的频率，故D 正确。
故选ABD 。
3. 如图所示，一列简谐横波沿x 轴正向传播，实线为时刻的波形，虚线为时的波形，P 为平衡位置在处的质点，Q 为平衡位置在处的质点。
时间内，质点P 运动的路程小于，则该波的波速为____________；处的质点运动到平衡位置的时刻为_____________。
上海华东师范大学第二附属中学2025届高一物理第一学期期末达标检测试题含解析
(2)墙壁对球的支持力
(3)A点绳子断开，求3s下落的位移和速度
参考答案
一、选择题：（1-6题为单选题7-12为多选，每题4分，漏选得2分，错选和不选得零分）
1、B
【解析】对斜面体P受力分析如图：
如果：（1）FN＝G的话，P体受力可以平衡，故P可能受2个力的作用；
（2）FN＜G的话，P不可能平衡
故选C。
3、C
【解析】曲线运动的速度方向沿轨迹上该点的切线方向，加速度指向轨迹弯曲的内侧，由此分析即可
【详解】根据曲线运动的速度方向沿轨迹上的切线方向，加速度指向轨迹弯曲的内侧，可知，重物在P位置时速度方向为②，加速度方向为③．故ABD错误，C正确
故选C
4、C
【解析】在国际单位制中三个力学基本量是长度、质量、时间，测量工具分别是刻度尺、天平、秒表，故C正确，ABD错误．
D.D项中物体的重力分解为水平向左压紧墙的分力G1和沿绳向下使绳张紧的分力G2，故选项D正确
8、BCDห้องสมุดไป่ตู้
【解析】A．物体在0～6s内的位移大小在数值上为图象和时间轴包围的面积，
平均速度
选项A错误；
B．撤去外力后的加速度：
根据
可得
μ=0.5
选项B正确；
C．有外力时的加速度：
根据
解得
F=15N
选项C正确；
B.物体与水平面间的动摩擦因数为0.5
C.外力F的大小为15N
D.加速段与减速段加速度大小之比为
9、如图所示，在粗糙水平地面上放着一个截面为四分之一圆弧的柱状物体A，A的左端紧靠直墙，A与竖直墙之间放一光滑圆球B，整个装置处于静止状态．把A向右移动少许后，它们仍处于静止状态，则
上海市华东师范大学第二附属中学2023-2024学年高二下学期期末英语试卷
上海市华东师范大学第二附属中学2023-2024学年高二下学期期末英语试卷一、语法填空Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fit s each blank.The future is greyAn aging world will oblige us to change how we liveMuch is made of intergenerational conflicts, with baby boomers competing against millennials or Gen Zers. But however these competing needs are resolved today, younger people will become a 1 (prized) resource in the future, because there will be fewer of them.Populations are slowly growing older than ever before due to two seemingly unstoppable demographic (人口的) forces. One is 2 , as countries become more prosperous, there is a decline in the number of children that people have. When that figure drops below the population replacement level of 2.1 children per woman—— 3 it is offset (抵消) by immigration—the head count shrinks as well as becoming more senior-heavy. If this trend continues, 97 percent of countries are forecast 4 (have) birthrates below the replacement level by the year 2100.The other key factor is that people are living longer in nearly every country in the world, a trend 5 has continued for decades. This 6 (drive) by multiple factors over the past century, including improvements in sanitation (公共卫生), the spread of vaccines and antibiotics, and, later on, by better treatments for heart disease and the decline of smoking. The next reshaping of life expectancy curves could come from the widespread use of weight-7 (reduce) drugs such as Ozempic, or indeed medicines already in wide use today.These ageing populations present many challenges, forcing countries to rethink their systems of pensions, healthcare and so on. The risk is that there will be too few people of working age to help provide care for 8 who are older.But we 9 not necessarily be too pessimistic. Just like in medicine, advances in artificial intelligence and robotics are continuing rapidly. Could the potential demographic crisisbe prevented by a workforce of intelligent machines? If so, 10 having to be worried about robots taking our jobs, we might one day welcome them with open arms.二、选词填空Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.Gather together a couple of good friends and take a leisurely walk through the streets—this is what many youngsters in China enjoy doing when they visit a new city.Citywalk can be a(n) 11 trip tailor-made for a small group of people organized by a travel agency, or simply a leisurely walk for once or two to explore new areas, sticking to the key point: avoiding famous scenic spots and big crowds to gain a more 12 experience of the places you visit. That is to say, you are given the freedom to explore endless possibilities.Hashtags (话题标签) and keywords for Citywalk are currently 13 across multiple Chinese social media platforms, as more and more people look to share their experiences and thoughts online.In China, the Citywalk trend is spreading from 14 cities like Beijing and Shanghai to second and third-tier cities, encouraging more participants and event organizers to get involved. Some organizers invite folk culture 15 to act as tour guides. Xiao Yiyi is a young entrepreneur (创业者) based in Changsha 16 new possibilities in the tourism sector. Recently she launched six Citywalk routes in different cities on her social media account, with the aim of providing experiences for visitors to walk in “open-air museums”, an approach for young people to 17 with a city. Xiao Yiyi said her events usually last around half a day.Beijing and Shandong have included Citywalk in their plans to promote cultural tourism and leisure tours. Shanghai has established Citywalk routes using public bus routes to help 18 reach more remote districts by public transport and continue on foot.Even though Citywalk is a relatively new phenomenon, industry insiders say that its 19is huge. Many tour guides also try to expand their influence online, sharing their experiences to attract potential customers.Citywalk is offerıng a positive change to urban travelers as they can better choose the experiences that correspond with their interests and needs. At the same time, Citywalk represents an opportunity for tour guides to offer a more 20 , professional service to meet with ever-changing market demands.三、完形填空“It’s almost a moral duty that museums should be free,” said Glenn Lowry, director of the Museum of Modern Art (MOMA) in 2002, when a ticket to MOMA cost $12. In October MOMA started charging $30, the latest in a series of price 21 involving the Metropolitan Museum, the San Francisco Museum of Modern Art and so on.Higher energy and labour costs have pushed up ticket prices in Europe, too. Prices have remained 22 only in Asia and the Middle East, where museums are younger and state funding is especially generous.Ticket fees may seem high, particularly in destination cities where tourists are 23 to be discouraged by spending a few more dollars. But whatever museums 24 , it is not covering their operating costs. The Association of Art Museum Directors reported in 2018 that ticket sales accounted on average for just 7% of total 25 at American art museums. Memberships contributed another 7%. The 26 of budgets usually come from charitable donations, grants and retail operations.European museums are less 27 admissions fees, because they are often heavily subsidized (补助) by governments. All national institutions in Britain offer free admission, as do most state-run museums in China while in America some 30% are free. Some observers have repeated Mr Lowry’s call for museum to stop charging for 28 entirely.29 price s go against museums’goal of sharing art with a more diverse public. They could also speed up the already steep decline in the share of Americans attending museums and galleries.Declining public interest is a challenge for institutions that rely heavily on public support.Those who choose not to visit a museum today may be the people who 30 government subsidies or refuse to write personal cheques as sponsors in a few years. Those who spend time inside museums’galleries are more likely to grasp their richness and want to 31 their own riches in them.Yet significantly reducing costs may not actually do much to 32 new audiences either. If tickets were free, “people who typically come anyway might come more often. 33 that, you’re not really changing your demographic (观众结构), says an economist who studies pricing in the arts. He 34 museums to the best American university: Harvard could afford to make tuition free for all, but many wealthy students who do not need the gift would be among the biggest beneficiaries(受益者). As museums throughout the West debate what price is right, most are unlikely to conclude the answer is 35 .“moral duty” or not.21．A．lists B．rises C．controls D．wars 22．A．ascending B．flexible C．awe-inspiring D．stable 23．A．unlikely B．supposed C．dissatisfied D．bound 24．A．promote B．submit C．charge D．exhibit 25．A．attendance B．donation C．operation D．revenue 26．A．motivation B．remainder C．generosity D．mixture 27．A．reliant on B．resistant to C．pessimistic about D．tolerant of 28．A．survival B．budgets C．collections D．admission 29．A．Floating B．Discounted C．Ballooning D．Competitive 30．A．contribute to B．vote against C．count on D．despair of 31．A．invest B．evaluate C．anchor D．assemble 32．A．discourage B．relieve C．attract D．entitle 33．A．With a view to B．Apart from C．Contrary to D．For fear of 34．A．credits B．attaches C．refers D．compares 35．A．zero B．both C．wrong D．above四、阅读理解Sia Godika was 13 when she noticed the barefoot children of construction workers at abuilding site near her house in the upscale Koramangala district of Bangalore, India.“They were just walking around that building site with their feet bare, hard, dirty and bleeding, as though it was an everyday practice for them,” reflects Sia, now 17. And it was in that moment that Sia realised the troubling contrast to her own privilege.She went back home, looked at her tender feet and opened her wardrobe doors, seeing shoes—many of which hadn’t been worn for months or years—piled up high. She headed to her mother’s wardrobe next, literally dusting off cobwebs from some shoes. Then she rushed to give them all away to the same children she saw at the building site.Later that year, with the help of her parents and community volunteers, Sia founded Sole Warriors, a charity dedicated to providing footwear to those in need, epitomised by its motto: “Donate a sole, save a soul.”The idea, which started as a dinner conversation with her parents, quickly grew. After she spread the word with posters and social media, enquiries from people who wanted to help came flooding in. Now in its fifth year, the organisation runs distribution drives in which Sole Warriors collects used footwear, refurbishes (翻新) it and donates the finished products to people in need.That need, says Sia, is endless. In a world where the poorest half of the population owns just two per cent of the wealth, an estimated 300 million people can’t afford footwear. Of the nearly 24 billion shoes made every year, shockingly more than 90 per cent end up in landfills.In its first distribution drive, Sole Warriors collected and gave out 700 pairs of shoes. Today that number stands at around 28,000 across four countries, including the United States, China and Liberia, thanks to the hard work of a core team of about 80 volunteers.But the organisation’s growth wasn’t without its challenges. When it came to looking for collaborators, such as a company that would do the refurbishments free of charge, Sia faced one obstacle after another before finding a partner in India’s Pressto Cobbler.In recognition of her impact, in 2021 Sia was given the Diana Award, one of the most prestigious(声誉高的) honours a young person can receive for social action or humanitarian work. But her work isn’t done. “Our goal has always been to touch a million feet,” she says.36．__________ inspired Sia to donate shoes to the children at the building site.A．Her privilege to live in an upscale community B．Her parents’ and community volunteers’ helpC．The sight of children without wearing shoes D．The piles of shoes in herparent’wardrobes37．The underlined word “epitomized” in para.4 can be replaced with _________.A．symbolized B．nicknamed C．sustained D．founded 38．What can be inferred about Sia’s charitable cause?A．Sia was awarded Diana Award for her cause at 20.B．Sia’s project recycles 90% of used shoes in landfills.C．Sia conquered many challenges posed by Pressto Cobbler.D．Sia is ambitious to expand her project by donating more shoes.39．Which of the following is probably the best title of the text?A．Miseries at Indian Building Site B．Walking in Someone else’s ShoesC．Favourite for the Diana Award D．Mission Achieved by PerseveranceFact or Myth?LYING ON YOURBACK MAKES YOU SNOREMORE①Snoring, namely breathing noisily, is caused byairflow being restricted through the body’s airwaysduring sleep. When you lie on your back, gravity pullstissues that surround your airways downwards,narrowing them. As air passes through the passagethrough the nose, it causes tissue to vibrate (振动)withevery breath and can create a snoring sound. When yousleep on your side this tissue doesn’t move downwards,opening up the airways and reducing the volume ofsnoring.40．Which section of a magazine does this passage probably belong to?A．Educational features.B．Medical science.C．Psychology forum.D．Classified ads. 41．Which of the following pictures best illustrates SNORING SCIENCE?A．B．C．D．42．Which of the following best fits into the numbered blanks ①—①—①?A．MYTH—FACT—FACT B．FACT—MYTH—FACTC．MYTH—FACT—MYTH D．FACT—MYTH—MYTHCook’s last tourUntil recently Captain James Cook was not a particularly controversial figure. But in January a statue of the 18th-century British explorer was pushed over in Melbourne and the words “The colony will fall” painted on the base. In Hawaii a monument in Cook’s memory has been covered with red paint and the message “You are on native land.” Cook has joined Edward Colston and Cecil Rhodes as a focus of anti-colonialist anger.Yet Cook was neither a slave trader nor much of an imperialist. He was, first and foremost, a brilliant navigator and mapmaker. Acting under government orders, he undertook threepioneering voyages in the Pacific between 1768 and 1779. His map-making transformed Europeans knowledge of the world’s largest ocean.An excellent new book draws on Cook’s letters and notebooks to tell the story of his third and final trip. Cook was almost 50 when he set off on HMS Resolution in July 1776. Cook had secret instructions from the government not only to claim new territory for Britain, but to search for a north west passage via the Bering Strait, a task even someone with his navigational experience found impossible.The author, Hampton Sides, focuses on Cook’s return to Australia and New Zealand — countries the explorer had first encountered almost a decade earlier — his discovery of the Society Islands and his time in Hawaii. It was there, in February 1779, that he was killed after a failed attempt to kidnap a local chief in response to the theft of a longboat.Cook was a man of his era. He believed Europe would have a civilising influence on many benighted (愚昧无知的) folk in the Pacific. He was cruel when carrying out punishments to his own crew as well as to any native people who opposed him.At the same time, Cook admired many of the people and places he encountered in the South Pacific. Unlike the Spanish, he had no interest in religious conversion. He tried hard to stop his men from spreading disease. For the most part, his land claims were aimed not at promoting a British empire but preventing grabs by its rivals, France and Spain.As the author makes clear, there is a balance to be struck between justified admiration for Cook’s seamanship and a justifiable hatred for the colonialism that followed native peoples’ first contact with Europeans. Today many Western countries are divided over how to think about such vexed legacies (棘手的后遗症). In 2020 half of Britons thought it was right that Colston’s statue was removed. Cook’s statue still stands in London, as does Rhodes’s in Oxford. The question is whether they will enjoy their high positions much longer.43．How do the public regard Cook currently?A．He is nobler than Colston and Rhodes.B．He is not a controversial historic figure.C．They blame the fall of the colony on him.D．Some people regard Cook as acolonialist.44．During Cook’s first voyage in the Pacific Ocean, he _________.A．landed the Society Islands and New Zealand B．commanded a warship called HMSResolutionC．searched for a route by way of the Bering Strait D．was revenged on a local chief for stealing a boat45．Cook’s behaviour can be described as ________.A．patriotic and religious B．well-intentioned and iron-handedC．charitable and moral D．rebellious and awe-inspiring46．Which of the following does Hampton Sides, the author of a book on Cook agree with?A．It is justifiable to remove Colston’s, Cook’s and Rhodes’s statue.B．Cook mainly aimed to expand domains by grabbing land from Spain.C．We should view Cook’s adventure and British colonialism objectively.D．The vexed legacies result from division in whether to remove the statues.All RiseWith just over 500 different species of shark classified, and a further two dozen waiting to be formally scientifically named, shark classification is not for the faint-hearted. 47 Sporting a wide, flattened head that is uniquely shaped like a double-headed hammer, it’s not hard to see how these sharks got their name. The eyes and openings at the end of the nose are located at either end of the “hammer” — or cephalopodic, as it’s technically called.48 While undoubtedly giving the sharks extra lift, the cephalopodic may also help them make sharper turns in the water. The widely spaced eyes allow for effective three-D vision, while the head’s broad shape also houses a sense organ operating like an underwater metal detector, it helps the predators (捕食性动物) to detect prey (猎物) hidden on or just under the sea-floor deposit.Though widespread, the scalloped hammerhead, one of the nine species of hammerhead, ismost commonly encountered in the Hammerhead Triangle in the eastern Pacific. While it can be relatively easily observed at a number of sites, particularly around seamounts, there are only a few places where it gathers in large numbers. 49 These groups of sharks tend to consist mostly of females, with the males remaining out in deeper waters.At locations such as the Hammerhead Triangle, numbers can reach into the hundreds or even, on occasion, thousands. As the sharks tend to assemble relatively close to the water’s surface, this is one ocean spectacle (壮观的景象) for diver.With its fins highly prized as the key ingredient in shark-fin soup, it’s no surprise that the scalloped hammerhead has experienced a dramatic population decline. Any sharks caught are often subjected to the frankly horrible treatment of ‘finning’, whereby fins are sliced off and the bodies thrown overboard.However, with hammerheads consistently ranking among the world’s top underwater wildlife attractions, shark tourism now contributes millions towards regional economies, thereby presenting a sustainable alternative to fishing them into extinction. 50A．Added to this, the shark is often the victim of fishing bycatch.B．The explanation behind the shape of the hammerhead’s head has long been debated.C．But there is one group that everyone would immediately recognize the hammerheads. D．The scalloped hammerhead can be distinguished by the V-shaped cut at its cephalopodic. E．As most predators at the top of the food chain operate as ‘lone wolves’, this is considered highly unusual behaviour.F．Doubtless, those enjoying this magnificent spectacle agree that the fins look far better on the sharks than they do floating in a bowl of soup.五、书面表达51．Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible.Imperfection can be a giftWe all want to do things well and for things to turn out right. However, growing up also involves accepting when things go wrong. In fact, messing up can lead to some of the mostinteresting and meaningful outcomes.Aiming for results, whether that’s getting good school grades, shining in sport or acing an art project, can help you focus on your goals. However, it’s just as important to focus on enjoying the process. Getting too hung up on things turning out exactly as you think they should can put a lot of pressure on you and lead to anxiety. That’s why it’s good to leave some room for errors and imperfections. Then if things don’t go as planned, it’s not a big deal and you may learn something new.Dr Vara is a psychologist who helps people take care of their mental health. She says getting things wrong is part of growing up. “We also have to experience the uncomfortable feeling when we get things wrong. This helps us to become stronger,” says Dr Vara. “Otherwise, we’ll be too scared to make mistakes. This fear can lead to us putting off doing difficult things or avoiding trying new things.” It’s important to realise that making mistakes is common, which shows that it is impossible to be perfect and failure is normal.Learning from your mistakes is an essential part of growing up. The most important thing is how you respond and what you choose to do next. Try not to take it too seriously, blame yourself or feel too disappointed or upset. Dr Vara explains, “Remember that you’re not a bad person for getting things wrong——you’re human. It might feel uncomfortable for a bit, then these feelings will pass and then you’ll bounce back.”Instead, think about what you might do differently next time. This has been proven to work. In one study, students who were reminded to forgive and be kind to themselves when they failed a test felt more motivated to try again._______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _六、翻译52．为什么不把料理家务作为自己的习惯呢? (ritual)(汉译英)53．教授介绍了风险管理的基本概念，这是金融学的基础。
华东师范大学无机化学期末考试试卷
华东师范大学期末试卷2005-2006学年第一学期一、一、选择题(共20分，每题2分，每题只有一个正确的答案)1. 对于下列各组物质中，可用Na2S一种试剂逐一鉴别出来的是(A)NH4Cl、(NH4)2SO4、(NH4)2CO3(B)Ba(NO3)2、Pb(NO3)2、Al(NO3)3(C)PbCl2、Bi(NO3)3、AgNO3(D)Na2S2O3、Na2SO4、Na3PO42. 下列硫化物中，不溶于Na2S溶液的是(A)As2S3 (B)Sb2S3 (C)SnS (D)SnS23. 碱土金属的一些性质与碱金属比较，下列叙述错误的是(A) 更容易形成过氧化物; (B) 密度大 (C) 熔点高 (D) 硬度大4. 工业上一般采用的制备金属钛的方法是(A)高温时用C还原TiO2 (B)用H2高温还原TiO2(C)用金属镁热还原TiCl4(D) TiCl4受热分解5. 关于金属铝的卤化物，下列说话中正确的是(A)AlF3是离子化合物，而其余卤化铝不是典型的离子化合物；(B) AlF3和AlCl3是离子化合物，而AlBr3和AlI3是共价化合物；(C)除AlI3是共价化合物外，其余都是离子化合物；(D)因为Al3+的半径小，极化能力很强，故铝的卤化物都是共价化合物。
6. 锡、铅的氢氧化物都表现出两性。
按下图所示方向，其酸、碱性的变化是(A) 1和2碱性增强，3和4酸性增强;(B) 1和2酸性增强，3和4碱性增强;(C) 1和3碱性增强，2和4酸性增强;(D) 1和3 酸性增强，2和4碱性增强。
7. 能表现出明显酸性的钒的氧化物是(A) VO (B)V2O3 (C) VO2 (D) V2O58. 酸性溶液中锰的标准生成自由焓与氧化态的关系如下图所示，由此判断能发生歧化反应的是(A)Mn2+(B)MnO2(C)MnO42-(D)MnO4-9. Fe(OH)3、Co(OH)3、Ni(OH)3都能与HCl反应，其中属于中和反应的是(A)Fe(OH)3与HCl的反应；(B)Co(OH)3与HCl的反应；(C)Ni(OH)3与HCl的反应；(D)都是发生的中和反应。
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华东师范大学期末试卷（B闭卷）
2008——2009学年第一学期
课程名称：思想道德修养与法律基础 学 号：
专 业： 姓 名：
课程性质：公共必修
一 二 三 四 总分 阅卷人签名
一、辨析题（判断对错并说明理由，每题4分，共20分）
1.
交友和参加各种社会活动是大学生的主要任务，是大学生活的中心内容。
2. 理想仅有现实性而没有任何预见性。
3. 爱祖国是抽象的政治概念，不是具体的。
4. 公共生活具有鲜明的封闭性和隐秘性。
5. 职业生活中最主要的法律是《刑法》和《经济法》
二、材料分析题（每题5分，共20分）
1．梁鹏是电影学院导演系的研究生，个子高高的，长得也很帅，但几年下来他有一个很悲观的
想法：做导演需要出名，但自己家是外地的，感到在大城市无法找到出名的机会，想想从本科到
研究生一路走来实在太累了，于是他办理了退学手续。学校的老师、同学无不为他惋惜。
问：结合实际谈谈这件事情给我们的启示。
2． 2006年9月9日晚上，广州某大学一名入学仅一周的新生，因“不能忍受这种生活”，
从学校的7楼纵身跳下，当场殒命。其时，他的父母正特意从家里赶往学校，准备在附近租房子
陪读一段时间。
问：此案例说明了什么问题？
3． 2006年4月13日，在某论坛，一位悲情丈夫声称自己的妻子幽月儿有了外遇，并且公布
了妻子和情人长达五千字的QQ对话，慷慨激昂地痛斥与妻子有染的小人物“铜须”，随后，数百
人在未经事实验证的前提下，轻率地加入网络攻击的战团，就在短短数天之内，这支“哄客游击
队”发展到了数万人之多。人们搜出“铜须”的真实身份和地址，用各种方式羞辱其尊严，把他
逼出大学校园，甚至迫使其家人不敢出门和接听电话，令当事人身心受到严重伤害。为了平息事
端，“铜须”用长达六分钟的视频来否认桃色事件，而那位“受害者”丈夫，也承认对其妻红杏出
墙的说法多有不实之处，从而请求网民取消追杀，但还是无法平息这场惊天动地的网络骚乱。
问：此事件说明了什么问题？
4． 2008年11月5日上午7点半左右，在南京东南大学成贤学院，一名女大学生在校园内
遭遇一名持刀男子纠缠，双方发生冲突，持刀男子将女生喉部割伤，又在其腹部捅了一刀，随后，
闻讯赶到现场的校园保安将行凶男子制服，并将受伤女生送到附近医院抢救。据知情者称，行凶
男子是受伤女大学生前任男友，由于听说女友另有“新欢”，急忙从老家赶到学校试图“拯救爱情”，
可因女子执意分手，该男子因爱生恨做出过激行为，最终酿成校园惨剧。截至记者发稿时，遭前
男友割喉的女生已脱离危险，警方正在进一步调查。
问：你对这个事件怎么评价？
三、案例分析题（每题6分，共30分）
1.陈某是民营企业的法定代表人，环境监察部门分管该区域的丁某经常以排污检查为由来厂里
吃饭，每次陈某都十分客气。一天丁某的弟弟拉来一车西瓜要求陈某买下，陈某声称已经给员工
发过降温费而拒绝。但第二天就接到环境监察部门以该厂排污超标而停工的通知。当天下午丁某
弟弟再次把西瓜拉来要求陈某买下，陈某无奈只得以高于市场价买下全部西瓜。当天下午五点环
境监察部门通知可以开工。事后陈某越想越生气但不知如何是好。
问：1）丁某及其弟弟的行为是否违法？（3分）
2）陈某应怎样维护自己的合法权益？（3分）
2、A市某公司组织员工100人到B市旅游，当走到某著名景点时，发现该景点闭门谢客，原
因是市政府有接待任务。愤怒的游客当即就游行到该市政府门前示威，要求赔偿损失。
问：某公司员工的行为是否合法？为什么？（6分）
3、某食品厂从社会上招收一批职工，工作岗位男女均适应。通过考试择优录取。考试总分为
400分。该厂规定：男性录取分数为240分以上，女性为320分以上。该厂录用了五十多名职工
后分别签订了为期二年的劳动合同。合同中约定：职工入厂须上交身份证由厂部统一保管；每人
须交纳500元作为定期体检费用；试用期为一年，职工每月可轮休二天；工资以职工每月的工作
业绩发放；合同履行期间，企业可根据经营状况随时解除劳动合同。
请问：食品厂的哪些做法违反了劳动法的规定？（6分）
4.男生项某与同校老乡女生王某恋爱一年有余。后项某好友林某暗中与王某恋爱，王某在项某
与林某之间周旋。项某知道后与王某争吵并分手。项某从失恋痛苦转为对林某的怨恨，发誓要教
训他。某周日清晨六点，项某到林某宿舍叫林出门有事要谈。随后带林某至自己宿舍，在老乡宋
某、丁某的协助下欧打林某，然后把林某绑在床架子上让其承认错误，并保证今后不与王某谈恋
爱。林某不从，他们三人一直不予松绑至下午五点。在林某写下今后不与王某交往的书面保证后，
项某才放林某出门。林某报案后去医院治伤。
问：项某及宋某、丁某的行为是违纪还是违法？为什么？（3分）这案例带给我们什么教训？（3
分）
5. 郭女士在五一期间逛商店，在某手机柜台处看见贴有一张告示“郑重承诺：手机三包，七
天包退、假一罚十”。因为有这个承诺，郭女士便花2528元现金购买了一部摩托罗拉手机。在六
月初给手机充电时发现手机电池鼓起了一块。经摩托罗拉公司鉴定属组装机。而商店某柜台称五
一期间告示已过时，售出商品概不退换。
问：销售者假一罚十的告示在法律上属于什么行为？是否具有法律效力？（3分）郭女士该如
何维权？（3分）
四、论述题（每题15分，共30分）
1、 结合实际谈谈大学生如何增强法制观念，维护法律权威？
2、 运用所学知识分析社会上部分青年中出现的“啃老族”现象。