上海大学检测复习
上海大学英语5 考试复习题答案 选择题
Unit 11.He had to abandon his journey before it had hardly begun.2.The jokes Bill told in an effort to cheer us up didn’t quite come off.3.He showed great enthusiasm in pursuing the new learning.4.We need a foreign policy that is more flexible than before.5.Bombing the town was a hostle act.6.The Chinese use chopsticks in place of knives and forks.7.There are two colors in the Chinese flag, namely red and yellow.8.The artist illustrated the book with pen-and-ink drawings.9.She always puts her bedroom in good order.10.The boxer knocked out his opponent in the second round.11.They had a swift response to the attack of the enemy.12.They expected a country water so abundant that it could supply their needsforever.13.Does the audience believe that the newscaster is lying and concealing something important.14.Viewers are rarely required to carry over any thought or feeling from one period of time toanother.15.“Rocket”is the name of a lovely big black dog that had rescued his mastertwice in the mountain expedition.16.What would you do about the problem if you were in my shoes?17.He is not a competent student, be sure, but he studies hard.18.He knew nothing against the man, and however he didn’t trust him.19.No sooner arrived he there than he fell ill.20.I should have given you more help, but I had been so busy with my study.Unit 21.W hen I arrived at the station, the train had already departed.2.H e glanced over the letter and walked away with out a word.3.I can appreciate the motive that prompts you to make this offer.4.J ohn likes to tell this stale joke to us again and again.5.Y ou will have to pay excess postal charges on this letter.6.I could scarcely understand what this book talks about.7.T he wrecks of the airplane were found in the depth of the forest.8.W herever she went, she felt someone hanging about.9.B efore doing it ,you’d better look out the advantages you can benefit from.10.I was stuck with some business, and, therefore, could not come in time.11.By this time next year we shall have completed academic study in university.12.They didn’t tell me whether she had got well.13.The house standing at the corner of the street is the museum of fine art crafts.14.I saw him walking across the park to the school.15.He stood at the platform and waved his hand until the train passed out of thesight.16.It’s no use talking to him as he clings very much to his own opinions.17.All that you have to do is to keep waiting in the cold wind.18.Now that everybody is here, let’s work out the traveling plan.19.The movie he directed is, if not good ,at least tolerable.20.Although it was extremely cold, nobody wanted to give up.Unit 31.H e wrote down her name for fear that he should forget it.2.T he driver looked over the engine carefully lest it should go wrong on the way.3.P lease bring it near so that I may see it clearly.4.H e didn’t go to the station on time, so he didn’t meet his old friend.5.T hey left in such a hurry that they forgot to turn off the TV.6.T here is very little hop that she will pass the final examination.7.I would like to accept your kind invitation with pleasure.8.N one of the five girls came on the trip.9.I cantact him every other week.10.Scarcely had he gone out when it started to snow.11.No one was injured in the accident.12.If you hear the fire alarm, you should leave the building quickly.13.The manager accused one of the hotel servants of stealing the money.14.As winter approached, the wether became colder.15.A camera takes light rays bounced off subjects and focuses them on a sheet of film.16.A coat of paint will dvelop small cracks as it shrinks over time.17.If you reveal your friend’s secrets, you will alienate him.18.This man is addicted to wine.19.John’s work is inferior to Tom’s.20.The murdered woman was killed with a blunt instrument.Unit 41.S everal people were killed as a result of the accident.2.A n old man, as such, really deserves respect.3.W ell, it is no wonder really, is it?4.J ohn has arrived already, hasn’t he?5.H e told me only part of the story and that was that.6.T he committee members resented the president’s not informing them of themeeting.7.T heir walking tour through Lapland never came off.8.H eat makes gases expand.9.T he doctor is feeling the little girl’s puls e. He says it feels normal.10.Mary was a more experienced teacher than Brian.11.The decision to change the deadline created a great deal of anger.12.No one would believe his story. It was so incredible.13.We can never understand Jim, for he always mumbles whatever he says.14.Professors and lawyers are among the most wealthy members in England.15.She would recommend me a good story-book.16.The doctor allowed her to go home on condition that she remained in bed.17.It is very crazy of you to let such an inexperienced young man to drive you home.18.The police had to appeal to force in order to break up the crowd.19.You didn’t say that you would come, but your words imply that you would.20.Look at the matter in its right perspective and you will agree with me.Unit 61.I t’s none of your business, you have no right to interfere.2.I wish I could give you the answer to your problems.3.T o ensure greater accuracy, all invoices will be double-checked before leaving the office.4.P eter showed her his draft of the report, and asked her suggestion.5.C an you deny the truth of his statement?6.W e finally reached an agreement after a lot of hard bargaining.7.I t takes years to qualify as a doctor.8.I don’t really know how to tackle the problem.9.H e said he couldn’t afford to reire from work and live only on his pension.10.It is comsiderate of you toturn down the TV while your sister is still ill in bed.11.It is important that you speak to the dean befor leaving for your vacation.12.It’s about time people took notice of what women did during the war.13.I’d have come with you but that I am so busy.14.I wish you had told me yesterday.15.I failed in my new job. If only I had listened to my parents.16.I’d rather you didn’t take those important documents with you.17.But for your help we would have been late .18.I felt as though we had known each other for years.19.I‘d rather you had given me a new one instead of having it repaired as youdid.20.It is time the kids went to bed.Unit 71.A lthough trees and land have been secured, the animals are disappearing.2.H unting is thought to be responsible for the extinction of some wildlife.3.I t so happened that two men wer caaught in the act of hunting wildlife in Daxinganling.4.P eople have done a lot in stopping the loss of wildlife habitat, which is expextedto end the slaughter.5.T he problems such as deforestation and population explosion were foreseen at an earlier time than animal hunting.6.T he rising slaughter adds a formidable challenge for the next century.7.T he underlying cause of the rapid growth of population is attributed to theuncontrolled birthrate.8.C losing off logging roads is thought to be helpful for protecting wildlife.9.S eeds are spread in the forest to grow into trees.10.Tigers are suffering from lack of preys, which are being killed by humans.11.Selling furs of sildlife can bring in a lot of money.12.By 2020, the silent dawn could be occurring in those forests, where animals are largely gone.13.By huting, we are losing the animals that make the forests function.14.Conservationists are struggling to protect a natural world reeling from suchthreats as population growth, deforestation and pollution.15.Responding to the recent research,some cigarette smokers are becominghealth-conscious.16.People sell the hunted wildlife for food or medicine.17.Daylight breaks on the small village.18.I don’t know why he complains about his low salary all the time. He doesn’tearn as little as I do.19.It was in 1985 that a hole in the ozone layer over the Antarctic was noticed.20.Every week, a staggering 10000 square kilometers of tropical rainforest are cut down.Unit 91.P eter was no more diligent than Jack because both of them failed the finalexamination.2.O nly when you have obtained sufficient data can you come to a sound conclusion.3.“Hurry up, or the tickets will have been sold out by the time we get th ere.”4.H uman beings are superior to animals in that they can use language to communicate.5.T he atmosphere of the earth is much denser than that of the moon.6.T he children went there to watch the iron tower being erected.7.B ats begin their flight as soon as the sun begins to sink below the horizon.8.W hen one is walking on a clear day, far from the city crowds, the mountain gives him a sense of peace.9.H e would have gone to the movies, had he known that Jane would be free.10.Clever as she was,she couldn’t work out t he problem at that moment.11.The government is trying to do something to promote better understandingbetween the two countries.12.There is not the slightest doubt about what he said.13.At the sight of the bear, the frightened girl burst into tears.14.The whole village turned out to welcome the foreign visitors.15.They suspected that the secret had been given away by one of their friends.16.American women had been denied the right go vote until 1920 after manyyears of hard struggle.17.He stopped the car to pick up a young girl who was hitch-hiking across Europe.18.Though the job was hard and new to them, they managed to accomplish it in two weeks.19.She felt relieved when she saw that her children were safe from the NATO’sbombing.20.We are advised that the equipment will be shipped here on due time with itsinstruction manual.。
细胞生物学考试重点复习资料(上海大学09级版)
细胞生物学考试重点复习资料绪论1. 细胞(cell)的发现英国人胡克发现细胞壁空腔,提出“cella”的概念;荷兰人列文虎克用高倍显微镜第一次观察到了活的细胞。
2. 细胞学说的内涵德国植物学家施莱登和动物学家施旺创立了细胞学说1.生命体都是由一个或多个细胞组成的.2.细胞是行使生命功能的最小单位.3.“细胞来源于细胞”,细胞只能由细胞分裂而成.3. 巴斯德实验——否定了自然发生说4.细胞体积大小为什么恒定?细胞体积的守恒定律:器官(个体)的大小主要决定于细胞的数量,与细胞的数量成正比,而与细胞的大小无关。
限制细胞本身的大小的主要因素:●细胞体积和表面积之间的关系:细胞为了维持一个最佳的生存环境,必须维持最佳的表面积(以适应细胞进行内外物质的交换),从而限制了体积的无限增大。
●细胞的最大化受制于细胞内关键分子的浓度(一些重要的生化反应需要一定的分子浓度才能进行)(真核细胞为解决细胞内重要分子的浓度问题,出现了细胞内的特化的内膜系统,使一些反应局限在特定的膜结合的细胞器内。
)●细胞的最小化受制于维持细胞生命活动所需的酶和蛋白质种类的最低量。
5.支原体是目前所知最小的,唯一一种没有细胞壁的原核细胞6.真核与原核细胞的差别以及真核细胞比原核细胞进步的方面原核细胞:没有明显的细胞核、无核膜和核仁,只有拟核,区室化不强真核细胞:有明显的细胞核,核膜和核仁,区室化强7. 病毒的基本特点:比细胞更小的生命体,无细胞结构,不能独立生存,只能在活细胞中进行增殖;结构:蛋白质外壳和遗传物质核,DNA或RNA(朊病毒以蛋白质作为遗传物质)细胞质膜与跨膜运输-11.“血影”:在低渗透下,红细胞吸水破裂,释放出内容物(血红蛋白[红细胞中唯一一种非膜蛋白])后,质膜重新封闭,此时的红细胞称为ghost.(分离红细胞膜蛋白的最好材料) 2.脂双分子层的推测实验根据运用Langmuir水盘法测出脂铺展后的面积与实际测量的红细胞的表面积之比约为2:1,Gorter和Grendel提出红细胞的结构是脂双层。
上海市宝山区上海大学附中2024届物理高一第一学期期中质量检测试题含解析
上海市宝山区上海大学附中2024届物理高一第一学期期中质量检测试题请考生注意:1.请用2B铅笔将选择题答案涂填在答题纸相应位置上,请用0.5毫米及以上黑色字迹的钢笔或签字笔将主观题的答案写在答题纸相应的答题区内。
写在试题卷、草稿纸上均无效。
2.答题前,认真阅读答题纸上的《注意事项》,按规定答题。
一、选择题:本大题共10小题,每小题5分,共50分。
在每小题给出的四个选项中,有的只有一项符合题目要求,有的有多项符合题目要求。
全部选对的得5分,选对但不全的得3分,有选错的得0分。
1、以下说法正确的是( )A.物体沿直线单方向运动时,通过的路程就是位移B.路程为零时位移一定为零;位移为零时路程不一定为零C.速度大小与位移成正比,与时间成反比D.速度大小不变的物体,其加速度必定不变2、甲、乙、丙三个物体同时同地出发做直线运动,它们的位x﹣t图象如图所示.在20s内它们的平均速度和平均速率的大小关系是()A.平均速度大小相等,平均速率v甲>v乙=v丙B.平均速度大小相等,平均速率v甲>v丙>v乙C.平均速度v甲>v丙=v乙,平均速率相等D.平均速度和平均速率大小均相等3、某军事试验场正在平地上试射对空导弹,若某次竖直向上发射导弹时发生故障,造成导弹的v-t图像如图所示,则下述说法中正确的是()A.第一秒内导弹匀速上升B.第二秒末导弹开始下落C.5s末导弹恰好回到出发点D.第一秒内的加速度比第三秒内的加速度大4、关于摩擦力,下列说法正确的是()A.静止的物体不可能受到滑动摩擦力B.滑动摩擦力的方向总是沿着接触面并且跟物体的相对运动方向相反C.静摩擦力的大小与接触面的正压力成正比D.摩擦力只可能为阻力,不可能为动力5、“星跳水立方”节目中,某明星从跳板处由静止往下跳,其运动过程的v﹣t图象如图所示,则下列说法正确的是()A.跳板距离水面的高度为7.5mB.1s末该明星的速度方向发生改变C.该明星入水前加速度向下,入水后加速度向上D.该明星在整个下降过程中的平均速度是7.5m/s6、如图所示,一小球用三根轻绳挂于天花板上,小球静止,绳1、3倾斜,绳2恰好竖直,则小球所受的作用力可能有( )A.2个B.3个C.4个D.5个7、一质点做匀变速直线运动,其运动方程为x=5t-t2(m),则下列说法正确的是A.质点的初速度为5m/s,加速度为-2m/s2B.质点的初速度为5m/s,加速度为-4m/s2C.质点的速度为0时,所用时间为5sD.质点在第2s内位移的大小为2m8、物体从静止开始做匀加速直线运动,前2s内通过的位移是4m,则()A.第1s内的位移是1mB.第3s末的速度是6m/sC.前4s内的平均速度是2m/sD.第2s内的平均速度是4m/s9、下列说法中错误的是()A.物体受到摩擦力作用时,一定受到弹力的作用B.运动的物体不可能受到静摩擦力C.汽车轮胎表面的花纹状沟槽,主要是使接触面变粗糙D.在压力大小一定的情况下,静摩擦力的大小可能变化10、如图所示.在倾角为θ的光滑斜面和档板之间放一个光滑均匀球体,档板与斜面夹角为α.初始时α+θ<90°.在档板绕顶端逆时针缓慢旋转至水平位置的过程,下列说法正确的是( )A.斜面对球的支持力变大B.档板对球的弹力变大C.斜面对球的支持力变小D.档板对球的弹力先变小后变大二、实验题11、(4分)在做“研究匀变速直线运动”的实验时,得到一条纸带如图所示,A、B、C、D、E、F、G为计数点,每两个计数点间还有4个点未画出,其中x1=7.05cm、x2=7.68cm、x3=8.33cm、x4=8.95cm、x5=9.61cm、x6=10.26cm.(1)为了达到实验的目的,除了有电磁打点计时器(含频率为50Hz的交流电源)、纸带、小车、细绳、导线、钩码、一端附有定滑轮的长木板外,还需要的测量仪器有______ ;(2)图中两计数点的时间间隔T=________s;(3)打点计时器在打B点时小车的瞬时速度v B=___________m/s(计算时保留两位有效数字);(4)小车的加速度的大小为a=___________m/s2(计算时保留两位有效数字).12、(10分)(1)电磁打点计时器是一种精密的计时仪器,使用4V-6V的低压________(选填“直流”“交流”)电源,若使用的电源频率为50Hz,则打相邻两点的时间间隔是________s。
2024年上海市宝山区上海大学附中物理高一第二学期期末质量检测试题含解析
2024年上海市宝山区上海大学附中物理高一第二学期期末质量检测试题注意事项1.考生要认真填写考场号和座位序号。
2.试题所有答案必须填涂或书写在答题卡上,在试卷上作答无效。
第一部分必须用2B 铅笔作答;第二部分必须用黑色字迹的签字笔作答。
3.考试结束后,考生须将试卷和答题卡放在桌面上,待监考员收回。
一、选择题(本题共12小题,每小题5分,共60分,在每小题给出的四个选项中,有的小题只有一个选项正确,有的小题有多个选项正确.全部选对的得5分,选不全的得3分,有选错的或不答的得0分)1、(本题9分)如图所示,一圆环上均匀分布在正电荷,x轴垂直于环面且过圆心O.下列关于x轴上的电场强度和电势的说法中正确的是()A.O点的电场强度为零,电势最低B.O点的电势为零,电场强度最大C.从O点沿x轴正方向,电场强度先增大后减小,电势一直降低D.从O点沿x轴正方向,电场强度一直减小,电势先升高后降低2、(本题9分)如图所示,两个线圈套在同一个铁芯上,线圈的绕向在图中已经画出.左线圈连着平行导轨M和N,导轨电阻不计,在导轨垂直方向上放着金属棒ab,金属棒处于垂直纸面向外的匀强磁场中,下列说法正确的是( )A.当金属棒向右匀速运动时,a点电势高于b点,c点电势高于d点B.当金属棒向右匀速运动时,b点电势高于a点,c点与d点为等电势点C.当金属棒向右加速运动时,b点电势高于a点,c点电势高于d点D.当金属棒向左加速运动时,b点电势高于a点,d点电势高于c点3、(本题9分)如图为平抛运动轨迹的示意图,对轨迹上的A、B两点,下列说法正确的是A.A的点速度方向沿切线向下,受力方向竖直向下B.B点的速度方向沿切线向下,受力方向沿切线向下C.A、B两点的速度、加速度均不同D.A、B两点的速度、加速度均相同4、(本题9分)一中学生沿400米圆形跑道,跑了全长的四分之三,用时一分钟.中学生运动的角速度大小为:A.5rad/s B.5rad/s3C.rad/s40πD.rad/s80π5、一种玩具的结构如图所示,竖直放置的光滑铁环的半径为R=20cm,环上有一穿孔的小球m,仅能沿环做无摩擦的滑动,如果圆环绕着过环心的竖直轴以10rad/s的角速度旋转(取g=10m/s2),则相对环静止时小球与环心O的连线与O1O2的夹角θ是()A.60°B.45°C.30°D.75°6、质量为2kg的物体在水平面内做曲线运动,已知x方向的位移-时间图像和y方向的速度-时间图像分别如图甲、乙所示。
上海大学通信学院学科复习资料-信号
拉氏变换基本性质
一、线性(叠加)
若 ,则
二、微分
若 ,则 .[若积分从 开始,则 取 ].
三、积分
若 ,则
四、延时(时域平移)
五、 域平移
六、尺度变换
七、初值
八、终值
九、卷积
十、相乘
十一、对 微分
第五章傅利叶变换应用于通信系统
一、系统函数H(jw)
稳定系统,零状态响应
冲激响应与系统函数之间傅利叶变换关系
阶跃函数
3.7傅利叶变换的基本性质
(一)对称性
若
(二)线性叠加
若
则
(三)奇偶虚实性
(1)f(t)为实函数
(2)f(t)为虚函数
(四)、尺度变换特性
若 ,则 (a为非零实常数)
(五)、时移特性
若 ,则
(六)频移特性
若 ,则
(七)、微分特性
若 ,则 ,
频域微分特性 ,
(八)、积分特性
若 ,则
3.8卷积特性(卷积定理)
一个系统输出只取决于该时刻输入,该系统称为无记忆系统(即时系统)。
反之则为记忆系统)(动态系统)。
例:电容器: .
iii、集总参数系统与分布参数系统;
iv、线性系统与非线性系统。
令 是一个连续时间系统,对 响应, 是对应于 的输出,则1、 是 的响应;(叠加性)
2、 是 响应;( 为任意常数)(齐次性,均匀性,比例性)
(一)、时域卷积定理
若 , 则
(二)、频域卷积定理
若 , 则
3.9周期信号傅利叶变换
( 为单脉冲傅利叶变换)
第四章拉普拉斯变换、 域分析
单边拉氏变换
乘以衰减因子 后要满足绝对可积条件, 取值范围称为收敛域。
上海市宝山区上海大学市北附属中学2024学年语文高三上期末复习检测试题含解析
上海市宝山区上海大学市北附属中学2024学年语文高三上期末复习检测试题注意事项1.考试结束后,请将本试卷和答题卡一并交回.2.答题前,请务必将自己的姓名、准考证号用0.5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置.3.请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符.4.作答选择题,必须用2B铅笔将答题卡上对应选项的方框涂满、涂黑;如需改动,请用橡皮擦干净后,再选涂其他答案.作答非选择题,必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答,在其他位置作答一律无效.5.如需作图,须用2B铅笔绘、写清楚,线条、符号等须加黑、加粗.1.在下面一段话的空缺处依次填入词语,最恰当的一组是近些年涌现出一批有筋骨、有道德、有温度的文艺作品,新时代文艺▲ 。
文化自信的底气鼓起文艺的精神风帆,在文艺作品中读者能感受到▲ 、奋斗进取的中国精神与中国力量,感受到正确价值观的引领与▲ ,感受到主旋律更加响亮。
A.焕然一新自强不息鼓动B.气象一新自强不息鼓舞C.气象一新发愤图强鼓动D.焕然一新发愤图强鼓舞2.阅读下面的文言文,完成各题。
冯唐者,其大父赵人。
父徙代。
汉兴徙安陵。
唐以孝著,为中郎署长,事文帝。
文.帝.辇过,问唐曰:“父老何自为郎?家安在?”唐具以实对。
文帝曰:“吾居代时,吾尚食监高祛数为我言赵将李齐之贤,战于钜鹿下。
今吾每饭,意未尝不在钜鹿也。
父知之乎?”唐对曰:“尚不如廉颇、李牧之为将也。
”上曰:“何以?”唐曰:“臣大父在赵时,为官率将,善李牧。
臣父故为代相,善赵将李齐,知其为人也。
”上既闻廉颇、李牧为人,良说,而搏髀曰:“嗟乎!吾独不得廉颇、李牧时为吾将,吾岂忧匈奴..哉!”唐曰:“主臣!陛下虽得廉颇、李牧,弗能用也。
”上怒,起入禁中。
良久,召唐让曰:“公奈何众辱我,独无间处乎?”唐谢曰:“鄙人不知忌讳。
”当是之时,匈奴新大入朝那,杀北地都尉印。
上以胡寇为意,乃卒复问唐曰:“公何以知吾不能用廉颇、李牧也?”唐对曰:“臣闻上古王者之遣将也,跪而推毂,日阃以内者,寡人制之;阃以外者,将军制之。
上海大学附中2024届物理高二上期中检测试题含解析
上海大学附中2024届物理高二上期中检测试题考生须知:1.全卷分选择题和非选择题两部分,全部在答题纸上作答。
选择题必须用2B铅笔填涂;非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。
2.请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。
3.保持卡面清洁,不要折叠,不要弄破、弄皱,在草稿纸、试题卷上答题无效。
一、单项选择题:本题共6小题,每小题4分,共24分。
在每小题给出的四个选项中,只有一项是符合题目要求的。
1、为了测量列车运行的速度和加速度大小,可采用如图甲所示的装置,它由一块安装在列车车头底部的强磁体和埋设在轨道地面的一组线圈及电流测量记录仪组成(测量记录仪未画出).当列车经过线圈上方时,线圈中产生的电流被记录下来,P、Q为接测量仪器的端口,若俯视轨道平面磁场垂直地面向下,如图乙所示.则在列车经过测量线圈的过程中,流经线圈I的电流方向为A.始终逆时针方向B.始终顺时针方向C.先逆时针,再顺时针方向D.先顺时针,再逆时针方向2、一石块从楼顶自由落下,不计空气阻力,取g=10m/s2,石块在下落过程中,第1.0s 末速度的大小为()A.5.0m/sB.10m/sC.15m/sD.20m/s3、质点在一平面内沿曲线由P运动到Q,如果用v、a、F分别表示质点运动过程中的速度、加速度和受到的合外力,下列图象中可能正确的是( )A.B.C.D.4、下图甲为分压器接法电路图,电源电动势为E,内阻不计,变阻器总电阻为r.闭合电键S后,负载电阻R两端的电压U随变阻器本身a、P(滑片)两点间的阻值R x变化的图线应最接近于乙图中的哪条实线()A.①B.②C.③D.④5、如图所示,虚线a、b、c代表电场中的三条电场线,实线为一带正电的质点仅在电场力作用下通过该区域时的运动轨迹,P、R、Q是这条轨迹上的三点,点R同时在电场线b上,由此可判断A.带电质点在P点的加速度比在Q点的加速度小B.带电质点在P点的电势能比在Q点的大C.带电质点在P点的动能大于在Q点的动能D.P、R、Q三点,P点处的电势最高6、如图所示电路,电源电动势e = 6V,内阻不计。
上海大学微机原理与接口技术复试笔试重点复习题
复习题一1、假设四种CPU主存地址分别为16根、20根、24根以及32根,试问每种CPU可寻址内存多少字节?解:64K字节,1M字节,16M字节,4G字节2、设字长为16位,将下列十进制数转换成二进制数,十六进制数以及BCD数。
①65②129③257④513解:①0000000001000001B,0041H,(0000000001100101)BCD②0000000010000001B,0081H,(0000000100101001)BCD③0000000100000001B,0101H,(0000001001010111)BCD④0000001000000001B,0201H,(0000010100010011)BCD3、设字长为8位,写出x、y的原码、反码和补码,并且用补码计算x+y,问是否有溢出?①x=-78y=35②x=-64y=-66解:①[X]原=11001110,[X]反=10110001,[X]补=10110010[Y]原=00100011,[Y]反=00100011,[Y]补=00100011因为:[X]补=10110010[Y]补=00100011那末:[X]补+[Y]补=11010101=[X+Y]补X+Y=-00101011没有溢出②[X]原=11000000,[X]反=10111111,[X]补=11000000[Y]原=11000010,[Y]反=10111101,[Y]补=10111110因为:[X]补=11000000[Y]补=10111110那末:[X]补+[Y]补,有溢出4、试用8位二进制写出以下数、字母以及控制命令的ASCⅡ码,还要写成奇校验、偶校验、标记校验及空格校验的ASCⅡ码。
①B②8③CR④NUL解:解答如下表中。
2.1哪两部分组成?它们的主要功能各是什么?解:8086CPU由总线接口部件BIU(Bus Interface Unit)和执行部件EU(Execution Unit)两大部分组成。
上海大学化学专业614分析化学考研复习全书资料真题大纲考研淘宝网
上海大学化学专业-614分析化学(含仪器分析)考研复习全书- 资料- 真题-大纲-考研淘宝网报考上海大学化学专业考研专业课资料的重要性根据考研淘宝网的统计,%以上报考上海大学化学专业考研成功的考生,尤其是那些跨学校的考研人,他们大多都在第一时间获取了上海大学化学专业考研专业课指定的教材和非指定的上海大学化学专业内部权威复习资料,精准确定专业课考核范围和考点重点,才确保了自己的专业课高分,进而才才最后考研成功的。
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上海大学市北附属中学2024年物理高三上期末质量检测模拟试题含解析
上海大学市北附属中学2024年物理高三上期末质量检测模拟试题注意事项1.考试结束后,请将本试卷和答题卡一并交回.2.答题前,请务必将自己的姓名、准考证号用0.5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置.3.请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符.4.作答选择题,必须用2B铅笔将答题卡上对应选项的方框涂满、涂黑;如需改动,请用橡皮擦干净后,再选涂其他答案.作答非选择题,必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答,在其他位置作答一律无效.5.如需作图,须用2B铅笔绘、写清楚,线条、符号等须加黑、加粗.一、单项选择题:本题共6小题,每小题4分,共24分。
在每小题给出的四个选项中,只有一项是符合题目要求的。
1、1897年汤姆孙发现电子后,许多科学家为测量电子的电荷量做了大量的探索。
1907-1916密立根用带电油滴进行实验,发现油滴所带的电荷量是某一数值e的整数倍,于是称这数值为基本电荷,如图所示,两块完全相同的金属极板止对若水平放置,板间的距离为d,当质量为m的微小带电油滴在两板间运动时,所受它气阻力的大小与速度大小成正比。
两板间不加电压时,得以观察到油滴竖直向下做匀速运动,通过某一段距离所用时间为t1;当两板间加电压U (上极板的电势高)时,可以观察到同一油滴竖直向上做匀速运动,且在时间t2内运动的距离与在时间t1内运动的距离相等。
忽略空气浮力,重力加速度为g。
下列说法正确的是()A.根据上板电势高时观察油滴竖直向上做匀速运动可以判定油滴带正电B.密立根根据实验数据计算出油滴所带的电荷量大约都是1.6×10-19CC.根据不加电压和加电压两个匀速过程可以求解出油滴所带的电荷量Q=()122 mgd t tUt+D.根据两板间加电压U(上极板的电势高)时观察到同油滴竖直向上做匀速运动,可以计算出油滴的电荷量Q=mgd U2、一开口向下导热均匀直玻璃管,通过细绳悬挂在天花板上,玻璃管下端浸没在固定水银槽中,管内外水银面高度差为h,下列情况中能使细绳拉力增大的是()A.大气压强增加B.环境温度升高C.向水银槽内注入水银D.略微增加细绳长度,使玻璃管位置相对水银槽下移3、如图所示,水平传送带A、B两端相距x=2m,物体与传送带间的动摩擦因数μ=0.125,物体滑上传送带A端的瞬时速度v A=3m/s,到达B端的瞬时速度设为v B。
2024届上海市宝山区上海大学附中物理高一下期末学业水平测试模拟试题含解析
2024届上海市宝山区上海大学附中物理高一下期末学业水平测试模拟试题注意事项1.考生要认真填写考场号和座位序号。
2.试题所有答案必须填涂或书写在答题卡上,在试卷上作答无效。
第一部分必须用2B 铅笔作答;第二部分必须用黑色字迹的签字笔作答。
3.考试结束后,考生须将试卷和答题卡放在桌面上,待监考员收回。
一、选择题(本题共12小题,每小题5分,共60分,在每小题给出的四个选项中,有的小题只有一个选项正确,有的小题有多个选项正确.全部选对的得5分,选不全的得3分,有选错的或不答的得0分)1、某同学设想驾驶一辆“陆地——太空”两用汽车(如图),沿地球赤道行驶并且汽车相对于地球速度可以增加到足够大。
当汽车速度增加到某一值时,它将成为脱离地面绕地球做圆周运动的“航天汽车”。
不计空气阻力,已知地球的半径R=6400km。
下列说法正确的是()A.汽车在地面上速度增加时,它对地面的压力增大B.当汽车速度增加到1.9km/s,将离开地面绕地球做圆周运动C.此“航天汽车”环绕地球做圆周运动的最小周期为1hD.在此“航天汽车”上可以用弹簧测力计测量物体的重力2、(本题9分)一质量为0.5 kg的小球沿光滑水平面以大小为5 m/s的速度水平向右运动,与墙壁碰撞后以大小为3m/s的速度反向弹回,如图所示,已知小球跟墙壁作用的时间为0.05s,则该过程中小球受到墙壁的平均作用力()A.大小为80 N,方向水平向左B.大小为80 N,方向水平向右C.大小为20 N,方向水平向左D.大小为20 N,方向水平向右3、(本题9分)下列所述的实例中(均不计空气阻力),机械能守恒的是()A.小石块被竖直向上抛出后在空中运动的过程B.木箱沿粗糙斜面匀速下滑的过程C .人乘电梯,人随电梯加速上升的过程D .子弹射穿木块,子弹在木块中运动的过程4、 (本题9分)以6m/s 的速度在水平面上运动的小车,如果获得2m/s 2的与运动方向同向的加速度,几秒后它的速度将增加到10m/s ( ) A .5s B .2s C .3s D .8s5、两个完全相同的金属小球(视为点电荷),带异种电荷,带电量绝对值之比为1:7,相距r 。
上海市上海大学市北附属中学2024学年数学高三第一学期期末复习检测试题含解析
上海市上海大学市北附属中学2024学年数学高三第一学期期末复习检测试题注意事项1.考试结束后,请将本试卷和答题卡一并交回.2.答题前,请务必将自己的姓名、准考证号用0.5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置. 3.请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符.4.作答选择题,必须用2B 铅笔将答题卡上对应选项的方框涂满、涂黑;如需改动,请用橡皮擦干净后,再选涂其他答案.作答非选择题,必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答,在其他位置作答一律无效. 5.如需作图,须用2B 铅笔绘、写清楚,线条、符号等须加黑、加粗.一、选择题:本题共12小题,每小题5分,共60分。
在每小题给出的四个选项中,只有一项是符合题目要求的。
1.设函数'()f x 是奇函数()()f x x R ∈的导函数,当0x >时,1'()ln ()<-f x x f x x,则使得2(1)()0x f x ->成立的x 的取值范围是( ) A .(1,0)(0,1)-B .(,1)(1,)-∞-+∞C .(1,0)(1,)D .(,1)(0,1)-∞-2.已知函数()(0)f x x x x =->,()xg x x e =+,()()ln 0h x x x x =+>的零点分别为1x ,2x ,3x ,则( )A .123x x x <<B .213x x x <<C .231x x x <<D .312x x x <<3.设02x π≤≤,且1sin 2sin cos x x x -=-,则( ) A .0x π≤≤ B .744x ππ≤≤C .544x ππ≤≤D .322x ππ≤≤4.已知数列满足:.若正整数使得成立,则( ) A .16B .17C .18D .195.某高中高三(1)班为了冲刺高考,营造良好的学习氛围,向班内同学征集书法作品贴在班内墙壁上,小王,小董,小李各写了一幅书法作品,分别是:“入班即静”,“天道酬勤”,“细节决定成败”,为了弄清“天道酬勤”这一作品是谁写的,班主任对三人进行了问话,得到回复如下: 小王说:“入班即静”是我写的;小董说:“天道酬勤”不是小王写的,就是我写的; 小李说:“细节决定成败”不是我写的.若三人的说法有且仅有一人是正确的,则“入班即静”的书写者是( ) A .小王或小李B .小王C .小董D .小李6.已知函数()()sin 06f x A x a a A ωπ⎛⎫=+-<< ⎪⎝⎭在区间70,3ωπ⎡⎤⎢⎥⎣⎦有三个零点1x ,2x ,3x ,且123x x x <<,若123523x x x π++=,则()f x 的最小正周期为( ) A .2πB .23πC .πD .43π 7.已知()f x 为定义在R 上的偶函数,当()1,0x ∈-时,()433xf x =+,则33log 2f ⎛⎫= ⎪⎝⎭( )A .2-B .3C .3-D .28.在天文学中,天体的明暗程度可以用星等或亮度来描述.两颗星的星等与亮度满足212152–lg E m m E =,其中星等为m k 的星的亮度为E k (k =1,2).已知太阳的星等是–26.7,天狼星的星等是–1.45,则太阳与天狼星的亮度的比值为( ) A .1010.1B .10.1C .lg10.1D .10–10.19.设x ∈R ,则“|1|2x -< “是“2x x <”的( ) A .充分而不必要条件 B .必要而不充分条件 C .充要条件D .既不充分也不必条件10.复数满足48i z z +=+,则复数z 在复平面内所对应的点在( ) A .第一象限B .第二象限C .第三象限D .第四象限11.已知直线,m n 和平面α,若m α⊥,则“m n ⊥”是“//n α”的( ) A .充分不必要条件 B .必要不充分条件 C .充分必要条件D .不充分不必要12.《易经》包含着很多哲理,在信息学、天文学中都有广泛的应用,《易经》的博大精深,对今天 的几何学和其它学科仍有深刻的影响.下图就是易经中记载的几何图形——八卦田,图中正八 边形代表八卦,中间的圆代表阴阳太极图,八块面积相等的曲边梯形代表八卦田.已知正八边 形的边长为10m ,阴阳太极图的半径为4m ,则每块八卦田的面积约为( )A .247.79mB .254.07mC .257.21mD .2114.43m二、填空题:本题共4小题,每小题5分,共20分。
2023-2024学年上海市上海大学市北附属中学英语高三上期末教学质量检测模拟试题含解析
2023-2024学年上海市上海大学市北附属中学英语高三上期末教学质量检测模拟试题注意事项:1.答题前,考生先将自己的姓名、准考证号填写清楚,将条形码准确粘贴在考生信息条形码粘贴区。
2.选择题必须使用2B铅笔填涂;非选择题必须使用0.5毫米黑色字迹的签字笔书写,字体工整、笔迹清楚。
3.请按照题号顺序在各题目的答题区域内作答,超出答题区域书写的答案无效;在草稿纸、试题卷上答题无效。
4.保持卡面清洁,不要折叠,不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。
第一部分(共20小题,每小题1.5分,满分30分)1.—What's wrong with him? He seemed upset.—He had to give up his drawing, not because he wanted ________ that way but because he had to be.A.this B.oneC.it D.such2.Many developing countries are unwilling to pursue their economic development______ destroying the environment despite there being several financial crises.A.at the risk of B.at the cost of C.at the end of D.at the mercy of3.The worse working conditions we are looking forward to ______ must have attracted the local government’s attention.A.see improved B.seeing improvedC.see improving D.seeing to improve4.—All the containers have been unloaded! Can it have been done by Frank? —Impossible! He ________ his car last night.A.has fixed B.had fixed C.would fix D.was fixing5.—Good morning. May I help you?—No, thank you. I’m just looking around.—________A.It’s up to you.B.How are you feeling today? C.Thanks for coming to see me. D.Take your time then.6.______ what had happened, they knew I would struggle and simply wanted to help because it was the right thing to do.A.Hearing B.To have heard C.Having heard D.Heard7.— What about the protection of these new machines?—Let’s keep the surface ________ dust by putting a cover over them.A.far from B.apart fromC.free from D.away from8.Although the Roma couldn’t be forced to pay taxes, they couldn’t vote ______they agreed to ______a government.A.unless, submit to B.until, correspond toC.when, resign to D.while, compromise to9.Be calm, Madam. Can you remember _____________ you had your mobile phone stolen?A.when was it that B.that it was whenC.where it was that D.it was where that10.Jack’s fellow workers often turn to him for help when trapped in trouble because he is a _____of ideas.A.fountain B.sessionC.diagram D.resource11.My sister ______ the baby while I’m at yoga.A.arranges B.minds C.assesses12.It's always a good idea to have a second key somewhere________ you lose the first one.A.in case B.now thatC.even though D.as long as13.I think it a great honor _____ to visit your country.A.to invite B.inviting C.having invited D.to be invited14.The monitor said that the learning method he used improved his maths. A.greatly B.nearly C.normally D.seriously15.— I am worn out. — Me too, all work and no play. So it’s time to ________. A.burn the midnight oil B.push the limitsC.go with the flow D.call it a day16.______ the deadline, the workers had to work overtime to get the job finished. A.Giving B.Given C.Having given D.To give17.Jess was sad and her friend helped her ___ the first awful weeks after her husband Bill died.A.break through B.break downC.get through D.get rid of18.What a pity! ________joined in the party, I would have met my old friend.A.lf I have B.Had I C.I had D.Have I19.Could I speak to__________ is in charge of International Sales please?A.who B.whatC.whoever D.whatever20.If it _____ earlier, the printing machine would not have broken down.A.has been repaired B.is repairedC.had been repaired D.was repaired第二部分阅读理解(满分40分)阅读下列短文,从每题所给的A、B、C、D四个选项中,选出最佳选项。
上海市宝山区上海大学市北附属中学2024年高三下学期第五次质量检测试题英语试题试卷含解析
上海市宝山区上海大学市北附属中学2024年高三下学期第五次质量检测试题英语试题试卷考生须知:1.全卷分选择题和非选择题两部分,全部在答题纸上作答。
选择题必须用2B铅笔填涂;非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。
2.请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。
3.保持卡面清洁,不要折叠,不要弄破、弄皱,在草稿纸、试题卷上答题无效。
第一部分(共20小题,每小题1.5分,满分30分)1.Sally likes going to school ______ she has got many good friends there.A.or B.because C.unless D.so2.— Do you often come here to have a walk?— No, only _________, because we are much too busy.A.occasionally B.eventuallyC.merely D.frequently3.—Mr Johnson, I have something I would like to trouble you with.—________. Just tell me what I can do.A.Y ou have my word B.Don't give me thatC.Y ou can say that again D.Don't stand on ceremony4.—To apply for a short-term study visa in the UK, I have to be able to speak some English, but I want to go there just to learn English.—Oh, it’s really____.A.a confidential source B.a catch-22 situationC.a Pandora’s box D.a Herculean task5.Don’t touch your eyes, nose and mouth, because they aren’t covered by skin and can _______ the virus more easily. A.take up B.pick up C.make up D.set up6.Christine is ______ about anything but her dress as she doesn’t really care about what she looks like in the eyes of others.A.cautious B.optimisticC.particular D.curious7.The explosion in the chemical plant ______ avoided had the county authorities, aiming too much at short-term interests, performed their duties from the beginning.A.should be B.might be C.must have been D.could have been8.— Do you like the book you father bought you?— Very much. I t’s exactly______I wanted.A.which B.thatC.what D.how9.Hearing the news, she rushed out, ________ the book ________ on the table and disappeared into the distance. A.left; lain open B.left; lay openedC.leaving; lie opened D.leaving; lying open10.Muir succeeds ______ other designers have failed—her clothes are Original, yet stylish.A.that B.what C.which D.where11.their final medical check, the astronauts boarded their spacecraft.A.Received B.Being received C.To receive D.Having received12.Zhouqu, Gansu was attacked by such a terrible mud-rock flow few residents had ever experienced before. A.as B.which C.where D.that13.At the news of the earthquake, the soldiers did what they could the victims.A.help B.to help C.to helping D.helping14.--- Hello, Tom. This is Mary speaking.--- What a coincidence! I_________ about you.A.just thought B.was just thinkingC.have just thought D.would just think15.The government officials met the workers and engineers working on the stadium, most____ were migrant workers.A.of which B.of who C.of whom D.of them16.The use of computers has made ______ possible for more people to work at home.A.it B.that C.which D.what17.More expressways in Sichuan soon to promote the local economy.A.are being built B.will be builtC.have been built D.had been built18.students English well, the teacher tries to speak English in class very often.A.Teaching B.TaughtC.To teach D.Teach19.The national park has a large collection of wildlife, ________ from butterflies to elephants.A.to range B.rangeC.ranging D.ranged20.—I’ve got something weighing on my mind. Could you give me some advice?—______. Tell me all about it and I’ll do what I can.A.Don’t mention it B.No wonderC.My pleasure D.No problem第二部分阅读理解(满分40分)阅读下列短文,从每题所给的A、B、C、D四个选项中,选出最佳选项。
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三. 测量仪表的输入输出特性
1. 测量仪表的静态特性指标有哪几种?P5 有4种: 灵敏度,线性度,滞环,重复性.
主要指标公式: 灵敏度:
k
?
dy dx
?
lim? x?
0
?y ?x
线性度:
El
?
?
? ym ym
? 100%
采用端基线性度(参见) 简单,直观。
动态特性: 响应时间或上升时间,
四.测量方法的分类
2. 误差表示的方法有哪几种? (1) 绝对误差:(2) 相对误差:(3) 最大引用误差:
精度等级的表示:P24 计算最大引用误差?0m ,然后去掉%并进行圆整。 仪表精度等级规范:
0.1 ,0.2,0.5,1.0 ,1.5 ,2.5,5.0。
2-2用0.2级100mA电流表去校验2.5级100mA电流表,前者示值80mA,后者示 值77.8mA。
互抵消的可能性增加,故各分项误差较多时,应采用方和根合成法比较合
理:
绝对系统不确定度
? ? ym ? ?
n i?1
( ?f ?xi
?im )2
绝对系统不确定度
? ? ym ? ?
n ? ln f (
i?1 ?xi
? im )2
? 2.8推导当测量值x=AmBnCp时的相对误差?x的表达式,设?A=+2.0%, ?B=+1.0%, ?C =+2.5%,m=2, n=3, m=1/2,求这时的?x?
检测技术基础复习
08年
第一章 测量的基本概念
一.测量的概念与定义
1.什么是测量?P1 研究自然界的任何对象,要对它进行定量研究和评价都是通
过测量手段来实现的。测量过程实际上是能量的变换的过程.
2. 什么是测量的基本方程?
x Ax ? x0
Ax: 测量结果; x: 被测量; x 0:单位量
3.什么是测量的基本功能 ? P2 变换功能 比较功能 选择功能 显示功能
二,测量仪表的结构和基本性能
1. 哪些是测量仪表的基本性能?P3 (一)精确度 (1) 精密度:仪表指示值的分散程度. (2) 准确度:仪表指示值接近真值的程度. (3) 精确度:精密度与准确度的综合反映. (二)稳定性度 (1) 稳定性度: (2) 环境影响:
2.测量仪表有几种的结构? P3 直接变换型结构, 平衡变换型结构,差动变换型结构.P5,P6
1. 有哪几种测量方法? 直接测量: 间接测量: 组合测量:
2. 有哪几种测量方式? 直读式测量,零位式测量,微差式测量:
实验方式下的线性度计算: 对某个温度仪表进行全程测试,记录在下表:
被测温度?C 0 理想输出mV 0 输出电压mV 0
20
40
60
80 100
4
8
12
16
ห้องสมุดไป่ตู้20
4.07 8.05 12.06 16.08 20
量程为30V,2.5 级的电压表 可能出现的最大绝对误差: ? xm=+30 ?2.5%=+0.75V .
显然,后一种电压表更精确。
2-4用一台5位数字电压表的4V量程分别测量4V和0.1V 电压,已知该表的基本误 差为+0.01%Ux+2 个字.求由于该表的基本误差引起的测量误差。
解:测量4V电压引起的测量误差:
解:
? ? ym
?
y?
?
y
?
0.08mV
ym ? 20mV
?
El
?
0.08 ? 100% ? 0.4% 20
第二章 测量误差及数据处理
一.测量误差分类
1. 测量误差可以分成哪三类? 1) 系统误差: 凡是按一定规律变化的误差。 (2) 随机误差:经过多次测量,其误差的大小与符号均无规律可循的误差。 (3) 疏失误差:对某一个被测量经过多次测量,可能某些测量结果明显偏 离真值所形成的误差。
(1)被校表的绝对误差,修正值和实际相对误差各为多少?
(2)若认为上述误差是最大误差,被校表的精度应定为几级?
解:(1)被校表的绝对误 差:
? I ? 77.8 ? 80 ? ? 2.2?mA?
被校表的修正值: ? ? 2.2?mA ?
被校表的实际相对误差:
?I
?
? 2.2 ? 100% 80
?
? 2.75%
2. 有效数字的位数 为了便于计算,可以按精度最差的数据运算.
3. 有效数字的运算规则
4. 有效数字位数的确定
五.误差的合成与分配
1. 常用函数的合成误差 2. 基本方法
对函数作全微分处理;取相对误差形式表示; 按最大不确定度考虑误差。
积函数:商函数:幂函数:
当各分项误差较多时,采用绝对值合成法过于保守,各分项误差因符号相
x
0 .49946
二。误差表示方法
1. 基本误差: 指仪器仪表在标准条件下使用时所产生的误差。
2. 附加误差: 仪器仪表在使用中偏离标准条件,除了存在基本误差外还会出现 附加误差。
三.随机误差的正态分布特点: 1.对称性: 2. 单峰性: 3. 有界性: 4. 抵偿性:
四.测量数据的处理
1. 测量数据的舍入法则 小于5舍,大于5入,等于5时采取偶数法 则. 保留三位或保留一位小数: 12.34---12.3 (4<5) 12.36---12.4 (6>5) 12.35----12.4 (=5偶数法则) 12.45----12.4 (=5偶数法则) 12.452—12.5 (>5)
(2)被校表的精度:
?m
?
? 2.2 ? 100% ? 100
? 2.2%
s ? 2.5
2-3 测量20V左右电压,现有两块电压表,其中一块量程为200V,0.5 级;另一块量 程为30V,2.5 级;该选择哪一块电压表测量更精确?
解:量程为200V,0.5 级的电压表 可能出现的最大绝对误差: ? xm=+200 ?0.5%=+1V .
? U ? ?0.01%? Ux ? 0.0002
? ? ? U ? 100% ? ?0.01% ? 0.0002 ? 100%
Ux
Ux
? ? (0.0001? 0.0002) ? 100% ? ?0.015% 4
测量0.1V 电压引起的测量误差:
? ? ? 0 .01 % ? 0 .0002
0.1 ? ? 0 .01 % ? 0 .2 % ? ? 0 .21 %
2-7已知一台5位半数字电压表的基本误差为 +0.003%Ux+0.002%Um. 选用1V档去测量电压,示值为
0.49946V, 求相对误差为多少?
解:基本误差为:
? ? ? (0 .003 % ? 0.49946 ? 0.002 % ? 1) ? ? 0 .0000349838
相对误差为:
? ? ? ? ? ? 0.0000349838 ? 100 % ? 0.007 %