上海市徐汇区2019学年第一学期期末质量监控九年级物理试卷
上海市普陀区2019届九年级上学期一模考试物理试卷带讲解
【分析】浮力的方向竖直向上；称重法测浮力： ．
【详解】（1）物块A下表面所处水的深度为：h 0.7m
（2）物块A所受浮力： ；
（3）浮力的方向竖直向上．
故答案为（1）0.5；（2）4；（3）竖直向上．
12.质量为0.9千克水的体积为_____米3，若水凝固成冰，则冰的质量为____千克，冰的体积为______米3．（ ）
B.一块橡皮用掉一半后，橡皮质量减少，故B不符合题意．
C.一块橡皮用掉一半后，橡皮质量减少，所以体积减少，故C不符合题意；
D.一块橡皮用掉一半后，质量和体积都变小了，但物质种类没有变化，所以密度不变，故D符合题意；
故选D.3.下列器材中，利用连通器原理工作的是
A.温度计B.液位计C.密度计D.抽水机
普陀区2018学年度第一学期初三质量调研
理化试卷物理部分
一、选择题
1.首先向人们证明大气压存在的著名物理实验是
A.马德堡半球实验B.托里拆利实验
C.探究液体内部压强规律的实验D.验证阿基米德原理实验
A
【分析】1654年，德国的马德堡市的市长在广场上做过一个著名的实验，他将两铜制的半球合在一起，抽出里面的空气，用两支马队向相反方向拉，当两侧的马匹达到16匹时，才将半球拉开，从而证实了大气压的存在，是大气压将两半球压在一起，这就是著名的马德堡半球实验．
（2）为了进一步定量研究导体中的电流与导体两端电压的关系，并归纳得出合理完整的实验结论，他们还需要的实验器材是_____，需要继续进行的实验操作是______．
①.不同 导体B、C ②.用导体B、C替换导体Ａ接入电路，观察并记录电流表的示数
【分析】由电路图可知，电路中电源(干电池)、电键、电流表、导体是串联的，闭合电键时，电流表测电路中的电流，即导体中的电流，通过观察比较图（a）和（b）可以得出加在导体两端电压增大，导体中的电流随之增大，这仅是一次实验得出的结论，只有通过多次实验得出结论才具有普遍性，故可以把导体A换成阻值不同的导体B、导体C进行实验．
2019-2020学年第一学期九年级物理期中考试试卷(含答案)
2019-2020学年第一学期期中考试试卷九年级物理学科第一部分（共24分）一、选择题(本题共12小题，每小题2分，共24分．每小题只有一个选项正确)1．如图所示器具中，属于省力杠杆的是（）2．关于力做功，下列说法中正确的是（）A．用力推一辆汽车，汽车静止不动，推力在这个过程中对汽车做了功B．提着水桶在路面上水平向前移动一段路程，手的拉力对水桶做了功C．用力踢出去的足球在空中向前运动的过程中，脚对球的力对球做了功D．用手从地面提起水桶，手的拉力对水桶做了功3.为了纪念物理学家在能量转化中发现守恒思想的重大贡献，用其名字来命名功和能单位的是（）A.牛顿B.焦耳C.安培D.伏特4．下列情景中，属于内能转化为机械能的是（）A．甲和丙B．乙和丁C．乙和丙D．丙和丁5．如右图所示电路中，当开关1S，2S都闭合后，则（）A．1L、2L都不发光B．1L、2L都发光C．1L发光、2L不发光D．1L不发光、2L发光6．关于温度、内能和热量，下列说法正确的是（）A．物体的温度升高，它含的热量增加B．物体的内能增加，一定要吸收热量C．独轮车A．笤帚D．钓鱼杆B．筷子A B C D 第7题图C．物体的内能越多，放热一定越多D．物体的温度升高，它的内能就增加7．下列四个电路中与右边电路元件实物图对应的是（）8.下列表述中，符合生活中实际的是（）A.同学从地上捡起一本物理课本做功约为0.2JB. 家中空调工作时电流约为1AC.成人骑车时的功率大约是600WD. 30V的电压对人来说是安全的9.如图所示，AC>BC，在相同时间内把同一物体分别沿斜面AC、BC匀速推上顶端，推力分别为F1、F2，功率分别为P1、P2，在不考虑摩擦的情况下( )A. F1<F2，P1=P2B. F1>F2，P1>P2C. F1=F2，P1=P2D. F1<F2，P1<P210.用两个相同的电热器给质量同为2kg的物质甲和水加热，它们的温度随时间的变化关系如图所示，据此判断甲物质10min吸收的热量为（）[水的比热容c=4.2×103 J/(kg·℃)]．A．5.04×105J B．2.52×105JC．4.2×105J D．条件不足，不能计算11.如图所示，用相同的滑轮组装成甲、乙滑轮组，分别将同一重物在相等的时间内提升相同的高度，不计绳重和摩擦，则（）A.甲、乙的拉力之比是2:3B.甲、乙绳的自由端速度之比是1:1C.甲、乙拉力的功率之比是3:2D.甲、乙的机械效率之比是1:112．一名游客蹦极时下落过程的v﹣t图象（忽略空气阻力）如图所示。
2019-2020学年上海市徐汇区九年级(上)期末英语试卷(1)
2019-2020学年上海市徐汇区九年级（上）期末英语试卷Part 2 Phonetics， Grammar and Vocabulary（第二部分语音、语法和词汇）Ⅱ. Choose the best answer （选择最恰当的答案）1. Which of the following underlined parts is different in pronunciation？（）A.r o bberyB.gl o balC.sp o tlessD.h o rrible2. Never be too proud． There is always ___________room for improvement to become perfect．（）A.aB.anC.theD./3. Tom and I both got an e﹣dictionary． His e﹣dictionary is cheaper than___________．（）A.meB.myC.myselfD.mine4. With great efforts and a strong will， the teenager has made a lot of ___________．（）A.progressB.achievementplaintD.friend5. Some learners listen to BBC to improve English， while ___________may prefer American shows．（）A.otherB.the otherC.othersD.another6. ___________special idea to show the hot social problems in the movie!（）A.WhatB.What aC.What anD.How7. To get enough fresh water， people remove salt ___________sea water in some areas．（）A.intoB.fromC.aboveD.against8. Reading is one of ___________and useful skills a human being can pick up．（）A.enjoyableB.more enjoyableC.most enjoyableD.the most enjoyable9. The toy company has promised ___________all the models from non﹣plastic materials．（）A.makeB.makingC.to makeD.made10. In the past 10 years ， the American artist ___________many wonderful cartoon characters．（）A.createdB.has createdC.was creatingD.had created11. It was said that tea didn't appear in the western world ___________the early 17th century．（）A.untilB.sinceC.beforeD.after12. Having too much loud noise around us ___________sometimes make people crazy．（）A.needB.shouldC.canD.ought to13. According to NASA， in 2024 the first woman ___________on the moon．（）A.is landedB.was landedC.has been landedD.will be landed14. The F1 driver is hugely talented， ___________he still works hard to achieve his goals．（）A.soB.butC.ifD.though15. Unlike human beings， cats can't smile and their looks seem cold and ___________．（）A.horriblyB.bravelyC.gentlyD.unfriendly16. Sorry for the inconvenience， for the workers ___________the museum at the moment．（）A.are repairingB.were repairingC.repairedD.have repaired17. Iceland will completely disappear in the world if we ___________nothing to the environment．（）A.doB.didC.have doneD.will do18. After receiving an e﹣mail of apology， the client felt better and stopped___________any more．（）plainB.to complainplainingplained19. ﹣﹣ Sorry， I've got the wrong book． Could you wait a minute？﹣﹣ ___________（）A.You are welcome．B.It's so nice of you．C.All right．D.Congratulations!20. ﹣﹣ ___________﹣﹣ I'm sorry． I don't really agree with you．（）A.The cartoon movie is too boring for us．B.Let's have an outing after the final exam．C.Have you heard about Tom these days？D.Who is the director of our school play？Ⅲ. Complete the following passage with the words in the box. Each can only be used once（将下列单词填入空格．每空格限填一词，每词只能填一次）Have you noticed some dogs putting their heads out of cars？ It is really a bad habit．It is said that dogs like to do so because they are curious about what they see．Many dogs arenot tall enough to have a clear（1）_______of the outside world from the front seat， and most dogs are too short to see clearly from the back seat． Trying to put their heads out of the window is a good way to（2）_______out their surroundings and enjoy a nice， cool breeze at the same time．It's actually not a good idea for dogs to do so． If your dog become overexcited and falls or jumps from your（3）_______car， it could injure itself． Some dust in the wind can make some dogs sick． High﹣speed wind can（4）_______a dog's ear． Plus， dogs can be easily injuredby flying small stones or other things． So， be careful when you take a dog with you in car．Australia is home to crocodiles． Thanks to world ﹣ first drones（无人机）， people are safer from crocodile attack．The high ﹣ tech drones were（1）_______ near Queensland，along creeks， riverbeds，and beaches．They are trying to find out animals as they went．There were five attacks in Queensland's touristic north between 2017 and 2018，（2）_______ two deadly attacks， and unusual sightings more than 40 milometers inland．The technology solution came from using newly developed shark﹣spotting drones to findout another kind of animals． As the pilot（3）_______the drone， the video is monitored and a warning message is sent back to the pilot when it picks up on something dangerous below．Designers say the finding is 93 percent（4）_______， while human's eye is around 16 to 19 percent correct．"A lot of time above crocodiles，a lot of images fed into the program as it's a learning program，which means it then gets better at spotting" the designer said．Ⅳ. Complete the sentences with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子，每空格限填一词）The team are working on a couple of unsolved________of this century．（mystery）Many important events were held in the________half of the year．（two）The________is so exciting that you can have a lot of food for thought．（speak）There's a large________of soft drinks to choose from in this store．（various）It's a pity that the world famous church was________damaged by a fire．（serious）The report says the faster you read， the________you understand what you've read．（little）It's worrying that some students are________of the risk of playing computer games．（aware）Don't forget to________the date， the price and the signature on the contract．（examination）Ⅴ. Complete the following sentences as required （根据所给要求完成下列句子，每题空格限填一词）The new comer could only tell the few names of cities in China．（改为反意疑问句）The new comer could only tell the few names of cities in China，________？Mike has found________ information on Chinese history．（对划线部分提问）________information has Mike found on Chinese history？They're making cartoon models ________．（对划线部分提问）________ they making cartoon models？Tom hates ironing clothes． Kitty hates ironing clothes， too．（保持句意不变）________Tom________Kitty likes ironing clothes．The monitor asked Miss Li． Can we do the short play next week？（改为宾语从句）The monitor asked Miss Li________ could do the short play the next week．A sudden loud noise from nowhere woke me up in the early morning．（改为被动语态）I________up by a sudden loud noise from nowhere in the early morning．the Internet， because of， stores， losing their customers， the development of， are （连词成句）________．Part 3 Reading and Writing （第三部分读写）Ⅵ. Reading comprehension （阅读理解）A.Choose the best answer （根据以下内容，选择最恰当的答案）Fifty years ago I had a young family of three boys．My husband Johnny and I left them with a friend while we made a trip to the cinema．It was dark and was raining hard．With the headlights shining on the road, we saw something ahead of us． Johnny pulled to a stop and I came out, ran to the grass and grabbed a small, wet, frightened creature． It was freezing cold and so tiny that it fit intothe palm of my hand but I still wasn't sure what it was．It stayed close to me for warmthand comfort． I wrapped it safely in my woolen hat had suggested that my husband turn back and go home． We thought it was a baby rabbit because it had long ears, long hindlegs and was greyish brown in color． Once home, we filled a box with old newspaper and a warm towel．We fed it milk and bread and hoped it would survive． We named our new animal Bobsy． We all loved it at first sight．Our boys were happy with the little animal and it seemed to enjoy all theattention． Sadly though, on the third day with us, it caught its back foot in a door and we quickly realized it was broken． We rushed to the vet, who said, "It's only a rabbit, I'll put it to sleep．" Our response was a very decisive, "________!"We found another vet and were told that she was a baby hare． We were told we should continue to keep her in her box for a week and her foot would be fine．After her recovery, Bobsy learned to use the kitty litter tray． She would comb her long ears with her front paws． Her favourite treats were chocolate drops and she was so smart that she would help herself to them straight from the packet． The local paper heard about________ and came to our house to take her photo and write a story about her． We hadher for seven wonderful years before we moved to New Zealand and we will never forget her．（1）Johnny and his wife saw a little animal________．A.on the way to the cinemaB. on the way back from the cinemaC. in their house gardenD. in their friend's home．（2）When the little animal was found， it was everything EXCEPT________．A.coldB. warmC. frightenedD. wet．（3）On the third day with us， the little animal got hurt because of________．A.the attentionB. JonnyC. the doorD. Bobsy．（4）The underlined sentence "No way!" means "________!"A.We don't allow you to do soB. We have no choice but to agree with youC. There is no chance for it to become betterD. There is no way for it to go back home．（5）The underlined word "this"refers to the fact that________．A.the little animal loved chocolate drops bestB.the little animal didn't get herself hurt any moreC.the little animal got better after staying in a box for a weekD.the little animal was smart enough to look after herself well．（6）The writer wrote this passage to________．A.give advice on how to keep a pet at homeB.record the detail of Bobsy for the local paperC.memorize the happy time with BobsyD.look for a new owner of Bobsy．B.Choose the best answer and complete the passage （选择最恰当的选项完成短文）Could you imagine a library where you borrow tools, appliances and sport gear（用具）? As a student, Sabrina could see the simple solution to a problem ﹣﹣ in order to reduce waste and create a good effect on our environment, perhaps we should try sharing the things we have．When she arrived in Brisbane four years ago．Sabrina had nothing with her but a suitcase full of clothes and a laptop．To start settling in, she asked friends if she could borrow the things she needed．Over time, as she started to have things of her own, she would （1）_______them to her friends in return．She then came to the conclusion that we don't need to own every single tool for every single（2）_______, we just need to have them: we need a place where we can borrowwhat we need ﹣﹣ in other words, a library． Sabrina decided to put her idea into action and so the Brisbane Tool Library was born．Within two years the tool library has grown to over 225 members and today is run by a team of volunteers, mostly women, from 13 different nationalities． For a small membership fee, the library offers（3）_______from hand and power tools to sporting and camping gear, and kitchen equipment．The library now has over 500 items in its storeroom with another 500 waiting to come． These are items that would otherwise have gone into Landfill when their owners are （4）_______them sitting on the shelf ﹣﹣ most are still new． "It doesn't need to be like this, " says Sabrina． "It's not just about reducing waste when things are at the（5）_______ of their life cycle． And recycling is not enough． We need to rethink purchasing from the very beginning． We need some change．"It's all part of the rise of the share economy, where phone apps allow （6）_______ to share rarely ﹣ used good with people who need them． Libraries have been around for centuries offering public use of shared resources．（1）A.lendB.reportC.readD.sell（2）A.excuseB.successC.purposeD.secret（3）A.somethingB.everythingC.anythingD.nothing（4）A.fond ofB.tired ofC.surprised atD.afraid of（5）A.startB.topC.restD.end（6）A.learnersB.officersersD.designersC.Fill in the blanks with proper words （在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给）If you have ever had trouble things you should do or would like to do， you have experienced procrastination（拖延症）．When you procrastinate， instead of working on important meaningful tasks， you find yourself performing meaningless activities．If you are a procrastinator， perhaps you spend lots of time watching TV， playing video games， checking Facebook， eating， cleaning or walking back and forth through the room． Afterwards， you feel powerless and have the f （1）________of guilt and trouble． Once again， you end up doing nothing．Sound familiar？L （2）________ people don't do anything and are just fine with it． Procrastinators，however，want to actually do something but can't force themselves to s（3）________ Another fact about procrastination is that it is d （4）________ from relaxation．Relaxingrecharges you with energy． But procrastination makes you not energetic． The less energy you have， the greater the chances of you putting off your responsibilities， and， once more， you will achieve nothing．My dad always used to say， "Peter， you need to learn how to give yourself orders．" I would always answer， "I tell myself what to do， I just don't listen．"Most likely， failure of the ability to listen to o（5）________is the main reason． The scientific name of this ability is self ﹣ regulation．Self﹣regulation is the ability to actively control your emotions．The more developed this ability is，the more often you will do what you tell yourself to do．Good news is it is possible to have self﹣regulation by t（6）________．You need to begin by setting the bar as low as possible． Creating habits isn't about quantity； it's about small steps and regular repetition．Once you learn a new habit， you can exercise your willpower muscle（肌肉）．As you s（7）________raise the bar，your willpower will gain strength day by day．Gradual changes are more pleasant than sudden， great changes． Therefore bigger cussess can be made．D.Answer the questions （根据以下内容回答问题）Electives（选修课）are always popular with students because they offer the chance to learn something exciting， and they're a welcome break from regular courses like maths and physics． Here are just a few of the exciting electives lucky teenagers can take in some of China's middle schools．●Self﹣defense skillsA school from ChongqingThe school offers a self ﹣ defense course ﹣﹣ just for girls． Those who attend the lessons have the chance to study basic self﹣protection skills in a one ﹣ on ﹣ one practice． They learn how to get away when they need to and defend themselves against attacks． "I feel safer in myself now，" said Zhang Yi， 15， a girl student．● PotteryA school from TianjinThe famous pottery scene in a movie called Ghost is a lasting memory for many movie ﹣goers． Young artists at the school love to get their hands dirty creating beautiful pieces． Students learn how to design and make various clay projects． At the end， they have the skills to make their won clay bowls， cups， vases and pots．●Horse ridingA school from BeijingEquestrians（马术）can look pretty cool， can't they？ Teenagers at this school can now choose a course in riding skills． They're taught to communicate with their horses and howto use reins． To ride a horse in the proper way， a student must hold the head forward and keep his back straight． Students come away from this elective not only knowing how toride a horse gracefully， but also physically fitter!●CoupletsA school from NanjingHow many of you can write a couplet？ This old literary（文学的）form is slowly disappearing， but Chinese culture lovers at the school are trying to make it alive． Fortheir elective， teenagers study old couplets and try to rhyme（押韵）their ownlines． Many of this year's students can't wait for the Spring Festival， when they'll be ableto show off their new skills．（1）Maths and physics are electives in middle schools of China ，aren't they？________ （2）How many electives in Chinese middle schools are introduced in the article？________（3）Which elective course is especially designed for girl students？________（4）What kind of art works can students have at the end of the elective "Pottery"？________（5）What are the common advantages of "Self﹣defense skills" and "horse riding"？ Both of the electives enable students________（6）Whom will the elective "Couplets" probably attract？ Why？________Ⅶ. Writing （作文）Write at least 60 words to introduce the elective you have attended at school．请以"My favorite elective"（我最喜欢的选修课）为题，写一篇不少于 60 个词的短文介绍你在学校参加过得印象深刻的选修课．谈谈该课程的学习内容以及你的学习体会．（注意：短文中不得出现考生的姓名、校名及其他相关信息，否则不予评分，标点符号不占格）________________________________________________．参考答案与试题解析2019-2020学年上海市徐汇区九年级（上）期末英语试卷Part 2 Phonetics， Grammar and Vocabulary（第二部分语音、语法和词汇）Ⅱ. Choose the best answer （选择最恰当的答案）1.【答案】B【解析】哪个的划线部分的发音不同？2.【答案】D【解析】不要太骄傲．总是有改进的空间来变得完美．3.【答案】D【解析】我和Tom都有一本电子字典．他的电子字典比我的便宜．4.【答案】A【解析】在巨大的努力和坚强的意志下，这个十几岁的青少年已经取得了很大的进步．5.【答案】C【解析】一些学习者听BBC来提高英语水平，而其他人可能更喜欢美国节目．6.【答案】B【解析】在电影中表现社会热点问题是一个多么特别的想法啊！7.【答案】B【解析】一些地区的人们从海水里去除盐来获得足够的淡水．8.【答案】D【解析】阅读是人类能够学会的最重要和有用的技能之一．9.【答案】C【解析】这家玩具公司已经答应用非塑料材料制作所有的模型．10.【答案】B【解析】在过去的十年里，这位美国艺术家创造了许多精彩的卡通人物．11.【答案】A【解析】据说茶直到17世纪初才出现在西方世界．12.【答案】C【解析】在我们周围有太多的噪音有时会让人发疯．13.【答案】D【解析】根据美国宇航局的说法，2024年第一位女性将登上月球．14.【答案】B【解析】这位F1赛车手很有天赋，但是他仍然努力工作以实现自己的目标．15.【答案】D【解析】不像人类，猫不能微笑而且看起来很冷漠和不友好．16.【答案】A【解析】很抱歉给您带来不便，因为工作人员此时正在修理博物馆．17.【答案】A如果我们不对环境做任何事，冰岛就会在世界上完全消失．18.【答案】C【解析】在收到一封道歉的电子邮件后，这位客户觉得好多了，并且不再抱怨了．19.【答案】C【解析】﹣﹣对不起，我拿错书了．你能等一下吗？﹣﹣好的．20.【答案】A【解析】﹣﹣这部卡通电影对我们来说太无聊了．﹣﹣不好意思，我不太同意你的看法．Ⅲ. Complete the following passage with the words in the box. Each can only be used once（将下列单词填入空格．每空格限填一词，每词只能填一次）【答案】B,A,E,D【解析】短文讲了一些狗把头伸出车外，详细地介绍了狗这样做的原因，及其带来的一些危险．【答案】E,A,C,D【解析】短文讲了澳大利亚是鳄鱼的故乡，多亏了世界上第一架无人机，人们才更安全地免受鳄鱼的攻击．详细地介绍了无人机是如何帮助人们的．Ⅳ. Complete the sentences with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子，每空格限填一词）【答案】mysteries【解析】这个小组正在研究本世纪的几个未解之谜【答案】second【解析】下半年举行了许多重要活动．【答案】speech【解析】演讲很激动人心，你可以有很多思考的余地．【答案】variety这家商店有各种各样的软饮料可供选择．【答案】seriously【解析】很遗憾世界著名的教堂被一场大火严重损坏．【答案】less【解析】报告说你读得越快，你就越不了解你读过的东西．【答案】unaware【解析】令人担忧的是有些学生不知道玩电脑游戏的风险．【答案】examine【解析】别忘了检查合同上的日期、价格和签名．Ⅴ. Complete the following sentences as required （根据所给要求完成下列句子，每题空格限填一词）【答案】couldn't he/ she【解析】这个新来的人只能说出中国几个城市的名字．这个新来的人只能说出中国几个城市的名字，是吗？【答案】a large amount of,How much【解析】Mike发现了大量有关中国历史的资料．Mike发现了多少有关中国历史的资料？【答案】with3Dprintingtechnology,How are【解析】他们正在用3D打印技术制作卡通模型．他们正在怎样制作卡通模型？【答案】Neither,nor【解析】Tom讨厌熨衣服． Kitty也讨厌熨衣服．Tom和Kitty都讨厌熨衣服．【答案】if/whether they【解析】班长问李老师，我们下星期能做短剧吗？班长问李老师是否他们下星期能做短剧．【答案】was woken在清晨一声突然的巨响把我吵醒了．在清晨我被一声突然的巨响吵醒了．【答案】Stores are losing their customers because of the development of the Internet．【解析】Stores are losing their customers because of the development of the Internet．由于互联网的发展，商店正在失去顾客．Part 3 Reading and Writing （第三部分读写）Ⅵ. Reading comprehension （阅读理解）A.Choose the best answer （根据以下内容，选择最恰当的答案）【答案】ABCADC【解析】本文讲了作者50年前在去电影院的路上捡到一只兔子，然后和这兔子一起生活度过7年快乐时光的故事．B.Choose the best answer and complete the passage （选择最恰当的选项完成短文）【答案】ACBBDC【解析】本文介绍了Sabrina建立布里斯班工具库的灵感来源、过程及其发展．这个工具库通过分享自己拥有的工具来减少浪费，并对环境产生好的影响．C.Fill in the blanks with proper words （在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给）【答案】eelings,azy,tart,ifferent,urselves,raining,lowly【解析】本文作者介绍了如何通过训练来加强自我管理，锻炼自己的意志力，从而改变拖延症．D.Answer the questions （根据以下内容回答问题）【答案】No， they aren't．,There are four．,Self﹣defense skills．,They can have their own clay bowls， cups ， vases and pots．,to become ftter， stronger and moreconfident．,ItattractsthosewholoveChineseliterature（literaryworks），becauseinthecoursetheycanlearnthattraditionalwayofwritingcoupletsandmakethedisappeari ngskillalive/becausetheycantrycreatingnewcoupletsinthecomingSpringFestivalandshowthebeautyoftraditionalChineseskill【解析】本文介绍了中国中学里出现的一些选修课：防身技能课、陶艺课、马术课和对联课．Ⅶ. Writing （作文）【答案】My favorite electiveMy favorite elective is self﹣defense course．（点题，最喜欢的选修课程） It is one of the most popular electives in our school． It teaches us how to protect ourselves in time of danger．【高分句型一】（学习内容） In my opinion， it's useful and necessary for us students， especally for girls to master self﹣defence skills．【高分句型二】 Besides，students can take the opportunity to build up their strength． As far as I know， many more students plan to take self﹣defense course next term．（学习体会）【解析】【高分句型一】It teaches us how to protect ourselves in time of danger．它教我们如何在危险的时候保护自己．how to protect ourselves 如何保护我们自己，是疑问词接不定式结构．【高分句型二】In my opinion， it's useful and necessary for us students， especally for girls to master self ﹣defence skills．在我看来，这是有用的和必要的我们学生，特别是女孩掌握自卫技能．It is+形容词 for sb to do sth对某人来说做某事是…的．。
2019-2020学年度上海市闵行区第一学期九年级质量调研考试(九年级物理)试卷(word版含参考答案)
闵行区第一学期九年级质量调研考试物理试卷（满分 100分，考试时间 90分钟）考生注意：1. 本试卷共五大题29小题。
2．答题时，考生务必按答题要求在答题纸规定的位置上作答，在草稿纸上、本试卷上答题一律无效。
一、选择题 （共20分）1．下列器材或装置中，属于连通器的是 A 船闸B 注射器C 吸盘D 密度计2．下列单位中，属于电能单位的是 A 安培B 伏特C 瓦特D 千瓦时3．滑雪板底板较宽是为了 A 增大对雪地的压强 B 减小对雪地的压强 C 增大对雪地的压力D 减小对雪地的压力4．在图1所示的电路中，能正确测出灯L 1两端电压的是A B C D 5．将小灯L 1、L 2接入电路后，灯L 1、L 2的功率分别为P 1、P 2。
已知P 1＜P 2，下列判断中正确的是A 若两灯串联，则L 1的电流较小B 若两灯串联，则L 1的电阻较小C 若两灯并联，则L 1的电流较大D 若两灯并联，则L 1的电阻较小 6．如图2所示，AC 、DF 分别是直径、长度均相同的康铜合金丝和镍铬合金丝，B 、E 是各自的中点。
分别将AB 、EF 接入电路中，这是为了研究导体电阻与哪个因素的关系图2L 2L 1 VS _+ L 1 VS L 2 +_ L 1S L 2 V_+ L 1S L 2V_+ 图1A 电压B 电流C 长度D 材料7．某同学比较“测物质密度”和“探究物质质量与体积关系”两个实验后，认为：①所测的物理量相同；②测量的工具相同；③需多次测量的目的不同。
他的判断正确的是A ①和②B ②和③C ①和③D ①、②和③ 8．小敏将装满水的溢水杯放在水平地面上，用细线系住某物块并将其缓慢浸入水中，如图3所示，物块始终不与溢水杯接触。
则下列判断正确的是A 水对杯底压力变化量等于物块所受的浮力B 杯对地面的压力变化量等于溢出水的重力C 水对杯底压强变化量等于杯对地面的压强变化量D 水对杯底压强变化量小于杯对地面的压强变化量 9．图4所示的电路中，电源电压为4伏。
2019-2020学年上海市徐汇区九年级(上)期末英语试卷含答案
2019-2020学年上海市徐汇区九年级（上）期末英语试卷Part 2 Phonetics，Grammar and Vocabulary（第二部分语音、语法和词汇）Ⅱ. Choose the best answer （选择最恰当的答案）A．robbery B．global C．spotless D．horrible2．Never be too proud． There is always ___________room for improvement to become perfect．（）A．a B．an C．the D．/ 3．Tom and I both got an e-dictionary． His e-dictionary is cheaper than ___________．（）A．me B．my C．myself D．mine4．With great efforts and a strong will， the teenager has made a lot of ___________．（）A．progress B．achievementC．complaint D．friend5．Some learners listen to BBC to improve English， while ___________may prefer American shows．（）A．other B．the other C．others D．another6．___________special idea to show the hot social problems in the movie!（）A．What B．What a C．What an D．How7．To get enough fresh water， people remove salt ___________sea water in some areas．（）A．into B．from C．above D．against8．Reading is one of ___________and useful skills a human being can pickup．（）A．enjoyable B．more enjoyableC．most enjoyable D．the most enjoyable9．The toy company has promised ___________all the models from non-plastic materials．（）A．make B．making C．to make D．made10．In the past 10 years ， the American artist ___________many wonderfulcartoon characters．（）A．created B．has createdC．was creating D．had created11．It was said that tea didn't appear in the western world ___________theearly 17th century．（）A．until B．since C．before D．after12．Having too much loud noise around us ___________sometimes make people crazy．（）A．need B．should C．can D．ought to13．According to NASA， in 2024 the first woman ___________on the moon．（）A．is landed B．was landedC．has been landed D．will be landed14．The F1 driver is hugely talented， ___________he still works hard to achieve his goals．（）A．so B．but C．if D．though15．Unlike human beings， cats can't smile and their looks seem cold and ___________．（）A．horribly B．bravely C．gently D．unfriendly16．Sorry for the inconvenience， for the workers ___________the museumat the moment．（）A．are repairing B．were repairingC．repaired D．have repaired17．Iceland will completely disappear in the world if we ___________nothingto the environment．（）A．do B．did C．have done D．will do18．After receiving an e-mail of apology， the client felt better and stopped___________any more．（）A．complain B．to complainC．complaining D．complained19．-- Sorry， I've got the wrong book． Could you wait a minute？ -- ___________（）A．You are welcome．B．It's so nice of you．C．All right．D．Congratulations!20．-- ___________-- I'm sorry． I don't really agree with you．（）A．The cartoon movie is too boring for us．B．Let's have an outing after the final exam．C．Have you heard about Tom these days？D．Who is the director of our school play？Ⅲ. Complete the following passage with the words in the box. Each can onlybe used once（将下列单词填入空格．每空格限填一词，每词只能填一次）22．A． including B． affected C． operates D． accurate E． testedAustralia is home to crocodiles． Thanks to world - first drones（无人机）， people are safer from crocodile attack．The high - tech drones were（1）________near Queensland，along creeks， riverbeds，and beaches．They are trying to find out animals as they went．There were five attacks in Queensland's touristic north between 2017 and 2018，（2）________two deadly attacks， and unusual sightings more than 40 milomete rs inland．The technology solution came from using newly developed shark-spotting drones to find out another kind of animals． As the pilot（3）________the drone， the video is monitored and a warning message is sent b ack to the pilot when it picks up on something dangerous below．Designers say the finding is 93 percent（4）______， while human's eye is around 16 to 19 percent correct．"A lot of time above crocodiles，a lot of images fed into the program as it's a learning program，which means it then gets better at spotting" the designer said．Ⅳ. Complete the sentences with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子，每空格限填一词）23．The team are working on a couple of unsolved_______of this century．（mystery）24．Many important events were held in the__________half of the year．（two）25．The_____is so exciting that you can have a lot of food for thought．（s peak）26．There's a large_____of soft drinks to choose from in this store．（various）27．It's a pity that the world famous church was________damaged by a fire ．（serious）28．The report says the faster you read， the___________you understand wh at you've read．（little）29．It's worrying that some students are_____________of the risk of playing c omputer games．（aware）30．Don't forget to________the date， the price and the signature on the con tract．（examination）Ⅴ. Complete the following sentences as required （根据所给要求完成下列句子，每题空格限填一词）31．The new comer could only tell the few names of cities in China．（改为反意疑问句）The new comer could only tell the few names of cities in China，________？32．Mike has found a large amount of information on Chinese history．（对划线部分提问）_____________information has Mike found on Chinese history？33．They're making cartoon models with 3D printing technology．（对划线部分提问）________________________they making cartoon models？34．Tom hates ironing clothes． Kitty hates ironing clothes， too．（保持句意不变）_________Tom________Kitty likes ironing clothes．35．The monitor asked Miss Li． Can we do the short play next week？（改为宾语从句）The monitor asked Miss Li__________ could do the short play the next week．36．A sudden loud noise from nowhere woke me up in the early morning．（改为被动语态）I___________up by a sudden loud noise from nowhere in the early morning．37．the Internet， because of， stores， losing their customers， the devel opment of， are（连词成句）____________________________________________________________________．Part 3 Reading and Writing （第三部分读写）Ⅵ. Reading comprehension （阅读理解）A.Choose the best answer （根据以下内容，选择最恰当的答案）38．Fifty years ago I had a young family of three boys．My husband Johnny and I left them with a friend while we made a trip to the cinema．It was dark and was raining hard．With the headlights shining on the roa d，we saw something ahead of us． Johnny pulled to a stop and I came out， r an to the grass and grabbed a small， wet，frightened creature． It was freezing cold and so tiny that it fit into the palmof my hand but I still wasn't sure what it was．It stayed close to me for warm th and comfort． I wrapped it safely in my woolen hat had suggested that my husband turn back and go home． We thought it was a baby rabbit because it had long ears，long hind legs and was greyish brown in color． Once home， we filled a bo x with old newspaper and a warm towel．We fed it milk and bread and hoped it would survive． We named our new animal Bobsy． We all loved it at first sight．Our boys were happy with the little animal and it seemed to enjoy all the attention． Sadly though， on the third day with us， it caught its back foot i n a door and we quickly realized it was broken． We rushed to the vet， who said， "It's only a rabbit， I'll put it to sleep．" Our response was a very de cisive， "No way!"We found another vet and were told that she was a baby hare． We were told we should continue to keep her in her box for a week and her foot would be fine．After her recovery， Bobsy learned to use the kitty litter tray． She would comb her long ears with her front paws． Her favourite treats were chocolat e drops and she was so smart that she would help herself to them straight fr om the packet． The local paper heard about this and came to our house to t ake her photo and write a story about her． We had her for seven wonderful years before we moved to New Zealand and we will never forget her．（1）Johnny and his wife saw a little animal_______．A．on the way to the cinemaB． on the way back from the cinemaC． in their house gardenD． in their friend's home（2）When the little animal was found， it was everything EXCEPT____．A．coldB． warmC． frightenedD． wet（3）On the third day with us， the little animal got hurt because of______．A．the attentionB． JonnyC． the doorD． Bobsy（4）The underlined sentence "No way!" means "_______!"A．We don't allow you to do soB． We have no choice but to agree with youC． There is no chance for it to become betterD． There is no way for it to go back home（5）The underlined word "this"refers to the fact that______．A．the little animal loved chocolate drops bestB．the little animal didn't get herself hurt any moreC．the little animal got better after staying in a box for a weekD．the little animal was smart enough to look after herself well（6）The writer wrote this passage to_______．A．give advice on how to keep a pet at homeB．record the detail of Bobsy for the local paperC．memorize the happy time with BobsyD．look for a new owner of BobsyB.Choose the best answer and complete the passage （选择最恰当的选项完成短文）39．Could you imagine a library where you borrow tools， appliances and sp ort gear（用具）？ As a student， Sabrina could see the simple solution to a problem -- i n order to reduce waste and create a good effect on our environment， perh aps we should try sharing the things we have．When she arrived in Brisbane four years ago．Sabrina had nothing with h er but a suitcase full of clothes and a laptop．To start settling in，she asked friends if she could borrow the things she needed．Over time，as she started to have things of her own， she would （1）__________them to her friends in return．She then came to the conclusion that we don't need to own every single t ool for every single（2）_______，we just need to have them：we need a place where we can borrow what we need -- in other words， a lib rary． Sabrina decided to put her idea into action and so the Brisbane Tool L ibrary was born．Within two years the tool library has grown to over 225 members and toda y is run by a team of volunteers， mostly women， from 13 different national ities． For a small membership fee， the library offers（3）__________from hand and power tools to sporting and camping gear， and ki tchen equipment．The library now has over 500 items in its storeroom with another 500 wait ing to come． These are items that would otherwise have gone into Landfill when their owners are（4）________them sitting on the shelf -- most are still new． "It doesn't need to b e like this，" says Sabrina． "It's not just about reducing waste when things are at the（5）____ of their life cycle． And recycling is not enough． We need to rethink purchasing from the very beginning． We need some change．"It's all part of the rise of the share economy， where phone apps allow （6）______ to share rarely - used good with people who need them． Libraries have been around for centuries offering public use of shared resources．（1）A．lend B．report C．read D．sell（2）A．excuse B．success C．purpose D．secret （3）A．something B．everything C．anything D．nothing （4）A．fond of B．tired of C．surprised at D．afraid of （5）A．start B．top C．rest D．end（6）A．learners B．officers C．users D．designersC.Fill in the blanks with proper words （在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给）40．If you have ever had trouble things you should do or would like to do，you have experienced procrastination（拖延症）．When you procrastinate， instead of working on important meaningful tasks， you find yourself performing meaningless activities．If you are a procrastinator， perhaps you spend lots of time watching TV ， playing video games， checking Facebook， eating， cleaning or walking back and forth through the room． Afterwards， you feel powerless and hav e the f （1）_________of guilt and trouble． Once again， you end up doing nothing．So und familiar？L （2）_______people don't do anything and are just fine with it． Procrastinators，however，want to actually do something but can't force themselves to s（3）________Another fact about procrastination is that it is d （4）_______from relaxation．Relaxing recharges you with energy． But procrastination makes you not energetic． The less energy you have， the greater the chan ces of you putting off your responsibilities， and， once more， you will achi eve nothing．My dad always used to say， "Peter， you need to learn how to give your self orders．" I would always answer， "I tell myself what to do， I just don't listen．"Most likely， failure of the ability to listen to o（5）_______is the main reason． The scientific name of this ability is self - regu lation．Self-regulation is the ability to actively control your emotions．The more developed this ability is，the more often you will do what you tell yourself to do．Good news is it is po ssible to have self-regulation by t（6）__________．You need to begin by setting the bar as low as possible． Creat ing habits isn't about quantity； it's about small steps and regular repetition．Once you learn a new habit， you can exercise your willpower muscle（肌肉）．As you s（7）_________raise the bar，your willpower will gain strength day by day．Gradual changes are more pleasant than sudden， great changes． Ther efore bigger cussess can be made．D.Answer the questions （根据以下内容回答问题）41．Electives（选修课）are always popular with students because they offer the chance to learn som ething exciting， and they're a welcome break from regular courses like mat hs and physics． Here are just a few of the exciting electives lucky teenager s can take in some of China's middle schools．●Self-defense skillsA school from ChongqingThe school offers a self - defense course -- just for girls． Those who att end the lessons have the chance to study basic self-protection skills in a one - on - one practice． They learn how to get away when they need to and def end themselves against attacks． "I feel safer in myself now，" said Zhang Yi， 15， a girl student．● PotteryA school from TianjinThe famous pottery scene in a movie called Ghost is a lasting memory for many movie - goers． Young artists at the school love to get their hands dirt y creating beautiful pieces． Students learn how to design and make various clay projects． At the end， they have the skills to make their won clay bowl s， cups， vases and pots．●Horse ridingA school from BeijingEquestrians（马术）can look pretty cool， can't they？ Teenagers at this school can now choose a course in riding skills． They're taught to communicate with their horses a nd how to use reins． To ride a horse in the proper way， a student must hol d the head forward and keep his back straight． Students come away from th is elective not only knowing how to ride a horse gracefully， but also physica lly fitter!●Cou pletsA school from NanjingHow many of you can write a couplet？ This old literary（文学的）form is slowly disappearing， but Chinese culture lovers at the school are try ing to make it alive． For their elective， teenagers study old couplets and tr y to rhyme（押韵）their own lines． Many of this year's students can't wait for the Spring Festival， when they'll be able to show off their new skills．（1）Maths and physics are electives in middle schools of China ，aren't they？（2）How many electives in Chinese middle schools are introduced in the art icle？（3）Which elective course is especially designed for girl students？（4）What kind of art works can students have at the end of the elective "Pottery"？（5）What are the common advantages of "Self-defense skills" and "horse riding"？ Both of the electives enable students（6）Whom will the elective "Couplets" probably attract？ Why？Ⅶ. Writing （作文）42．Write at least 60 words to introduce the elective you have attended at sc hool．请以"My favorite elective"（我最喜欢的选修课）为题，写一篇不少于 60 个词的短文介绍你在学校参加过得印象深刻的选修课．谈谈该课程的学习内容以及你的学习体会．（注意：短文中不得出现考生的姓名、校名及其他相关信息，否则不予评分，标点符号不占格）________________________________________________．21.BAED22.EACD23. mysteries24. second25. speech26. variety27. seriously28. less29. unaware30. examine31. couldn't he/ she32. How much33. How are34. Neither Tom nor35. if/whether they36. was woken37. Stores are losing their customers because of the development of the Internet．38.ABCADC39.ACBBDC40.（1）eelings （2）azy（3）tart （4）ifferent （5）urselves （6）raining （7）lowly41. No，they aren't．There are four．Self-defense skills．They can have their own clay bowls，cups ，vases and pots．to become ftter，stronger and more confident．It attracts those who love Chinese literature（literary works），because in the course they can learn that traditional way of writing couplets and make the disappearing skill alive．/ because they can try creating new couplets in the coming Spring Festival and show the beauty of traditional Chinese skill．。
2019-2020学年沪科版九年级物理第一学期期中测试题(含答案)
2019-2020学年九年级（上）期中物理试卷一、选择题（每题只有一个正确选项，每题2分，共32分）1．以下温度中最接近23℃的是（）A．冰水混合物的温度B．冷冻室里冰淇淋的温度C．健康成年人的体温D．让人感觉温暖而舒适的房间温度2．“早穿皮袄午穿纱，围着火炉吃西瓜。
”这句谚语反映了我国新疆的某些地区夏季昼夜气温变化显著。
其主要原因是砂石比水具有较小的（）A．热量B．内能C．比热容D．热值3．如图所示，下列现象中不属于做功改变物体内能的是（）A．弯折铁丝B．搓手取暖C．下滑时臀部发热D．烧热水水变热4．图中各措施中为了加快蒸发的是（）A．酒精灯不用时盖上灯帽B．植树时剪除大量枝叶C．地膜种植D．将衣服晾在向阳、通风处5．如图所示是四冲程汽油机一个工作循环中的三个冲程，缺少的一个冲程的名称及顺序，下列判断正确的是（）A．吸气冲程，应在甲图之前B．压缩冲程，应在甲、乙图之间C．做功冲程，应在乙、丙图之间D．排气冲程，应在丙图之后6．中央电视台的“三星智力快车”节目介绍说，蜜蜂飞行与空气摩擦产生静电，因此蜜蜂在飞行中就可以吸引带正电的花粉，以下说法正确的是（）A．蜜蜂带负电B．蜜蜂带正电C．空气不带电D．空气带负电7．下列现象中，属于吸热的物态变化是（）A．冬天，湖水结冰B．夏天，从冰箱里拿出来的饮料罐“出汗”C．深秋，清晨草地上出现了霜D．春天，冰封的河面消融8．下列关于热现象的解释正确的是（）A．加油站都有“请熄火加油”的提示，这是因为汽油在常温下易升华成汽油蒸气，汽油蒸气遇明火容易爆炸B．衣柜中的樟脑丸过一段时间会变小甚至没有了，这是升华现象C．汽油的热值比干木柴的热值大，所以汽油放出的热量也更多D．被水蒸气烫伤比沸水烫伤更严重是因为水蒸气汽化时要放出热量9．在图中，要用电流表测量灯L1中的电流，正确的电路图应是（）A．B．C．D．10．如图所示，两盏相同的电灯在闭合开关后都能发光。
过一会儿，两盏电灯突然都不亮了，且电压表和电流表的示数均变为零，此时电路发生的故障可能是（）A．电灯L1灯丝断了B．电灯L2灯丝断了C．电灯L1短路D．电灯L2短路11．关于物体的内能、温度、热量，下列说法正确的是（）A．内能可以通过做功的方式转化为机械能B．0℃的冰块一定没有内能C．物体吸热，温度一定升高D．热传递一定是从内能多的物体传给内能少的物体12．将一瓶酒精用去一半，则剩余酒精的密度、比热容和热值（）A．热值变为原来的二分之一，密度、比热容不变B．都变为原来的二分之一C．热值不变，密度、比热容变为原来的二分之一D．都不变13．用酒精灯给试管加热，如图所示，试管口软木塞冲出的过程中，下列说法正确的是（）A．水蒸气对软木塞做功，水蒸气内能增大B．水蒸气的内能转化为软木塞的机械能C．能量的转化与热机压缩冲程能量转化相同D．试管口的“白气“是水蒸气汽化形成的14．举重比赛有甲、乙、丙三个裁判，其中甲为主裁判，乙和丙为副裁判。
2019--2020学年第一学期九年级物理期末考试及答案
2019-2020学年第一学期期末调研考试九年级物理试卷注意事项: 1.本试卷满分为100分，考试时间为90分钟。
2.答卷前先将密封线左侧的项目填写清楚。
3.答案须用黑色字迹的钢笔、签字笔或圆珠笔书写，密封线内不得答题。
一、选择题（本大题共22个小题, 共47分。
1～19题为单选，每小题2分,只有一个选项符合题意；20～22为多选，每小题3分，全选对的得3分，选对但不全的得2分，有错选或不选不得分。
选出答案后请将答案写在答题纸上相应位置）Array 1．下列措施不利于“坚决打好蓝天保卫战”的是（）A．禁止露天焚烧秸秆B．发展燃煤火力发电C．推广新能源公交车D．限制燃放烟花爆竹2. 有关分子运动，下列说法正确的是（）A．液体很难被压缩，说明分子间有斥力B．固体间不能发生扩散现象C．手捏海绵，海绵体积变小，说明分子间有空隙D．扫地时尘土飞扬，说明分子在做无规则运动3．如下图所示，对于图片中所描述的物理过程，下列分析中正确的是（）A．图甲，空气被压缩时，空气的内能减少B．图乙，瓶子内的空气推动塞子跳起时，空气的内能增大C．图丙，试管内的水蒸气推动塞子冲出时，水蒸气的内能减少D．图丁，汽缸内的气体推动活塞向下运动时，气体的内能增大4．甲铁块的质量是乙铁块的3倍，吸收相同的热量，则甲、乙两铁块的比热容之比和升高的温度之比分别为（）A．1：1，1：3 B．1：3，1：3 C．1：1，3：1 D．3：1，3：1 5．下列关于热现象的说法中正确的是（）A．物体的温度越高所含的热量越多 B．内燃机的做功冲程将机械能转化成内能C．燃料燃烧释放的热量越多，热值越大D．物质的比热容越大反映了物质吸收或放出热量的能力越强6. 下列物理量中，以科学家安培的名字作为单位的是（）A.电功B.电阻C.电压D.电流7. 下列物理量最接近实际的是（）A. 一节干电池电压2VB. 流过家用空调的电流约为0.5AC. 人体安全电压220VD. 考场里一盏日光灯的额定功率约为40W 8．通常情况下，下列物品中属于绝缘体的是（）A.木质铅笔里的石墨芯B.导线中的铜丝C.钢丝钳把手上的塑料套D.蓄电池内的硫酸溶液9. 如图所示，验电器A带负电，验电器B不带电，现在用带有绝缘柄的金属棒将AB验电器的金属球连接起来，下列说法正确的是（）A．电流从A到B B．电流从B到AC．正电荷从A转移到B D．正电荷从B转移到A10.下列推理正确的是（）A．带异种电荷的两个物体相互吸引，则相互吸引的两个物体一定带异种电荷B．电阻中有电流时它两端一定有电压C．通过两个灯泡的电流相等，说明两个灯泡一定是串联的D．灯泡越亮，说明该灯泡的额定功率越大11. 下列符合交通路口安装的过斑马线的红、绿信号灯工作情况的电路图是（）A B C D12. 在右图所示的电路中，电源电压保持不变，闭合开关S，电路正常工作，一段时间后，发现两个电表的示数都变大，则出现的故障可能是（）A．R1短路 B．R1断路 C．R2短路 D．R2断路13. 小明将酒精气体传感器R2、电阻R1与电压表组成如右图所示电路。
2019-2020学年九年级物理期末考试计算题题库及答案解析
2019-2020学年九年级物理期末考试计算题题库一．计算题1．某工人用如图所示的滑轮组提升重物。
物体在15s内被匀速提升了2m，所用拉力F为300N，在提升重物的过程中，有用功是900J．求：（1）该物体的重力；（2）工人做功的功率；（3）该滑轮组的机械效率。
2．用图所示的滑轮组提升重物，已知物体重为200N，人用125N的拉力向下拉动绳子，5s 内可使物体匀速上升2m，绳重和摩擦不计。
求：（1）动滑轮的自重（2）拉力所做功的功率（3）该滑轮组的机械效率3．在某场馆建设中，采用了如图所示的装置提升重物，工人师傅用1000N的拉力F向下拉绳，使重1600N的重物匀速上升了5m，此过程中克服绳重和摩擦力做功500J，求：（1）拉力F做的功；（2）该滑轮组的机械效率；（3）动滑轮的重力。
4．如图所示，人以600N的力向下拉动绕在滑轮组的绳子一端10s，使绳端向下移动1.5m，重物匀速上升0.5m，已知滑轮组的机械效率为80%（g＝10N/kg）。
（1）求人做功的功率；（2）被吊起的重物质量是多大？（3）若不计摩擦，动滑轮的重为多少？5．如图所示，用滑轮组提起一个重为10N的物体，在拉力F＝6N的作用下，10s内物体沿竖直方向匀速升高了2m（不计绳重和摩擦）。
计算（1）动滑轮的重力；（2）此滑轮组的机械效率；（3）拉力F的功率。
6．冬天即将来临，学校积极创造条件为学生供应开水。
在这个过程中，若用锅炉将300kg 的水从20℃加热到100℃，燃烧了11.2kg的煤[c水＝4.2×103J/（kg•℃），煤的热值为3×107J/kg]，则：（1）锅炉内300kg的水吸收的热量是多少？（2）此锅炉的效率是多少？（3）某同学从开水房打了3kg的100℃的开水，为了便于使用，他将这100℃的开水和质量为5kg的20℃的冷水混合，若不计混合过程的热损失，则混合后温水的温度为多少？7．与煤气相比，天然气相对较为安全、环保，所以大连市将在5年内完成天然气置换工程，若某种天然气的热值为3.6×107J/m3，某次使用天然气烧水，将2kg水从20℃恰好加热到70℃，消耗了0.02m3的天然气。
上海市徐汇区2019年高三第一学期期末(一模)学科质量检测数学试题及答案(word版)
徐汇区2018-2019学年第一学期高三年级质量调研考试 数学试卷 2018.12考生注意：1．本场考试时间120分钟.试卷共4页，满分150分．2．作答前，在试卷与答题纸正面填写学校、班级、考生号、姓名等．3．所有作答务必填涂或书写在答题纸上与试卷题号对应的区域，不得错位．在试卷上作答一律不得分．4．用2B 铅笔作答选择题，用黑色字迹钢笔、水笔或圆珠笔作答非选择题．一、填空题（本大题共有12题，满分54分，第1~6题每题4分，第7~12题每题5分）考生应在答题纸的相应位置直接填写结果．1.若复数z 满足i 12i z ⋅=+，其中i 是虚数单位，则z 的实部为___________.2.已知全集U =R ，集合{}2,,0A y y x x x -==∈≠R ，则U A =ð___________. 3.若实数,x y 满足1xy =，则222x y +的最小值为___________.4.若数列{}n a 的通项公式为*2()111n na n N n n=∈+，则lim n n a →∞=___________. 5.已知双曲线22221x y a b-=（0,0a b >>）的一条渐近线方程是2y x =，它的一个焦点与抛物线220y x =的焦点相同，则此双曲线的方程是___________.6.在平面直角坐标系xOy 中，直线l 经过坐标原点，()3,1n =r是l 的一个法向量.已知数列{}n a 满足：对任意的正整数n ，点()1,n n a a +均在l 上.若26a =，则3a 的值为 .7.已知()212nx n N x *⎛⎫-∈ ⎪⎝⎭的展开式中各项的二项式系数之和为128，则其展开式中含1x 项的系数是 .（结果用数值表示）8.上海市普通高中学业水平等级考成绩共分为五等十一级，各等级换算成分数如下表所示：其他人的成绩至少是B 级及以上，平均分是64分.这个班级选考物理学业水平等级考的人数至少为___________人.9.已知函数()f x 是以2为周期的偶函数，当01x ≤≤时，()lg(1)f x x =+，令函数[]()()(1,2)g x f x x =∈，则()g x 的反函数为______________________.10.已知函数sin y x =的定义域是[],a b ，值域是12⎡⎤⎢⎥⎣⎦-1，，则b a -的最大值是___________.11.已知R λ∈，函数24,()43,x x f x x x x λλ-≥⎧⎪=⎨-+<⎪⎩.若函数()f x 恰有2个零点，则λ的取值范围是___________．12.已知圆M :1)1(22=-+y x ，圆N :1)1(22=++y x .直线1l 、2l 分别过圆心M 、N ，且1l 与圆M 相交于,A B 两点，2l 与圆N 相交于,C D 两点.点P 是椭圆22194x y +=上任意一点，则PA PB PC PD ⋅+⋅u u u r u u u r u u u r u u u r的最小值为___________.二、选择题（本大题共有4题，满分20分，每题5分）每题有且只有一个正确选项．考生应在答题纸的相应位置，将代表正确选项的小方格涂黑． 13.设R θ∈，则“=6πθ”是“1sin =2θ”的（ ） （A ）充分非必要条件 （B ）必要非充分条件（C ）充要条件 （D ）既非充分也非必要条件14.魏晋时期数学家刘徽在他的著作《九章算术注》中，称一个正方体内两个互相垂直的内切圆柱所围成的几何体为“牟合方盖”.刘徽通过计算得知正方体的内切球的体积与“牟合方盖”的体积之比应为:4π.若正方体的棱长为2，则“牟合方盖”的体积为（ ）（A ）16 （B ） （C ）163 （D ）128315.对于函数()y f x =，如果其图像上的任意一点都在平面区域{}(,)|()()0x y y x y x +-≤内，则称函数()f x 为“蝶型函数”.已知函数：①sin y x =；②y ，下列结论正确的是( )（A ）①、②均不是“蝶型函数” （B ）①、②均是“蝶型函数”（C ）①是“蝶型函数”；②不是“蝶型函数” （D ）①不是“蝶型函数”；②是“蝶型函数”16.已知数列{}n a 是公差不为0的等差数列，前n 项和为n S .若对任意的*n N ∈，都有3n S S ≥，则65a a 的值不可能为（ ） （A ）2 （B ）53 （C ）32 （D ）43三、解答题（本大题共有5题，满分76分）解答下列各题必须在答题纸的相应位置写出必要的步骤.17.（本题满分14分，第1小题满分6分，第2小题满分8分） 如图，已知正方体''''ABCD A B C D -的棱长为1.（1）正方体''''ABCD A B C D -中哪些棱所在的直线与直线'A B 是异面直线？（2）若,M N 分别是','A B BC 的中点，求异面直线MN 与BC 所成角的大小.18.（本题满分14分，第1小题满分6分，第2小题满分8分）已知函数2(),2ax f x x -=+其中.a R ∈ （1）解关于x 的不等式()1f x ≤-；（2）求a 的取值范围，使()f x 在区间(0,)+∞上是单调减函数.19.（本题满分14分，第1小题满分6分，第2小题满分8分）我国的“洋垃圾禁止入境”政策已实施一年多. 某沿海地区的海岸线为一段圆弧AB ，对应的圆心角3AOB π∠=. 该地区为打击洋垃圾走私，在海岸线外侧20海里内的海域ABCD 对不明船只进行识别查证（如图：其中海域与陆地近似看作在同一平面内）.在圆弧的两端点,A B 分别建有监测站，A 与B 之间的直线距离为100海里. （1）求海域ABCD 的面积；海（2） 现海上P 点处有一艘不明船只，在A 点测得其距A 点40海里，在B 点测得其距B点. 判断这艘不明船只是否进入了海域ABCD ？请说明理由.20.（本题满分16分，第1小题满分4分，第2小题满分6分，第3小题满分6分）已知椭圆2222:1(0)x y a b a bΓ+=>>的长轴长为1,直线:l y kx m =+与椭圆Γ交于,A B 两点.（1）求椭圆Γ的方程；（2）若A 为椭圆的上顶点，M 为AB 中点，O 为坐标原点，连接OM 并延长交椭圆Γ于N，ON =u u u r u u ur ,求k 的值； （3）若原点O 到直线l 的距离为1，OA OB λ⋅=u u u r u u u r ，当4556λ≤≤时，求OAB ∆的面积S 的范围.21.（本题满分18分，第1小题满分4分，第2小题满分6分，第3小题满分8分） 已知项数为0n 0(4)n ≥项的有穷数列{}n a ，若同时满足以下三个条件：①011,n a a m ==(m 为正整数)；②10i i a a --=或1，其中02,3,,i n =…；③任取数列{}n a 中的两项,()p q a a p q ≠，剩下的02n -项中一定存在两项,()s t a a s t ≠，满足p q s t a a a a +=+. 则称数列{}n a 为Ω数列.（1）若数列{}n a 是首项为1，公差为1，项数为6项的等差数列，判断数列{}n a 是否是Ω数列，并说明理由；（2）当3m =时，设Ω数列{}n a 中1出现1d 次，2出现2d 次，3出现3d 次，其中*123,,d d d N ∈，求证：1234,2,4d d d ≥≥≥；（3）当2019m =时，求Ω数列{}n a 中项数0n 的最小值.徐汇区2018-2019学年第一学期高三年级质量调研考试数学试卷参考答案。
2019年上海市金山区中考一模物理试卷带讲解
6.用50牛的水平力把重30牛的正方体木块紧压在竖直墙壁上，如图所示，这时木块对墙壁的压力为
A. 20牛B. 30牛C. 50牛D. 80牛
C
【分析】对木块进行正确的受力分析，找准平衡力，然后根据二力平衡的条件和相互作用力得到木块对墙壁的压力．
【详解】用50N的水平力把重30N的木块紧压在竖直墙壁上，此木块处于平衡状态，受到平衡力的作用．水平方向上的平衡力是对木块的压力和墙壁对木块的支持力，根据二力平衡的条件可知墙壁对木块的支持力是50N，根据力的作用相互性可知木块对墙壁的压力为50N．
【详解】分析电路图，开关S闭合，电阻和灯泡串联，电压表测量R两端 电压，电流表测量通过电路的电流；
如果灯泡断路，不能发光，电路其它部分也断路，所以电流表、电压表都无示数，两个电表示数均变小；
如果灯泡短路，不能发光，电压表测量电源电压，电压表的示数变大，电流表测量通过电阻的电流，原来电流表的示数 ，后来电流表的示数 ，电源电压U不变， ，所以灯泡短路时电流表的示数变大，两个电表示数均变大；
①.小于②.等于③.大于
【分析】影响电阻大小的因素有：导体的材料、长度和横截面积；串联电路中各处电流都相等；当两个电阻并联时，电阻两端的电压相等，根据欧姆定律得到通过两根导线的电流大小关系．
【详解】因为甲、乙两导线材料相同、长度相同，甲的横截面积大于乙的横截面积，即甲导线比乙导线粗，所以甲的电阻小于乙的电阻；若将它们串联后接入电路，串联电路的电流相等，通过甲导线的电流等于通过乙导线的电流；若将它们并联后接入电路，它们两端的电压相等，甲的电阻小于乙的电阻，根据 可知通过甲导线的电流大于乙导线的电流．
故选C．
7.质量相等的均匀的实心铅球、铜球、铁球、铝球（ ），体积最小的是
上海市徐汇区2019-2020学年九年级上学期期末(一模)英语试题
上海市徐汇区2019-2020学年九年级上学期期末（一模）英语试题Part 2 Phonetics, Grammar and Vocabulary（第二部分语音、语法和词汇）Choose the best answer （选择最恰当的答案）1.Which of the following underlined parts is different in pronunciation?A. robberyB. globalC. spotlessD. horrible2.Never be too proud. There is always _____ room for improvement to become perfect.A. aB. anC. theD. /3.Tom and I both got an e-dictionary. His e-dictionary is cheaper than _____. .A. meB. myC. myselfD. mine4.With great efforts and a strong will, the teenager has made a lot of ______.A. progressB. achievementC. complaintD. friend5.Some learners listen to BBC to improve English, while _____ may prefer American shows.A. otherB. the otherC. othersD. another6._____ special idea to show the hot social problems in the movie!A. WhatB. What aC. What anD. How7.To get enough fresh water, people remove salt _____ sea water in some areas.A into B. from C. above D. against8.Reading is one of ________ and useful skills a human being can pick up.A. enjoyableB. more enjoyableC. most enjoyableD. the most enjoyable9.The toy company has promised ________ all the models from non-plastic materials.A. makeB. makingC. to makeD. made10.In the past 10 years, the American artist ________ many wonderful cartoon characters.A. createdB. has createdC. was creatingD. had created11.It was said that tea didn’t appear in the western world ________ the early 17th century.A. untilB. sinceC. beforeD. after12.Having too much loud noise around us ________ sometimes make people crazy .A. needB. shouldC. canD. ought to .13.According to NASA, in 2024 the first woman ________ on the moon .A. is landedB. was landedC. has been landedD. will be landed14.The F1 driver is hugely talented, ________ he still works hard to achieve his goals.A. soB. butC. ifD. though15.Unlike human beings, cats can’t smile and their looks seem cold and ________.A. horriblyB. bravelyC. gentlyD. unfriendly16.Sorry for the inconvenience, for the workers ________ the museum at the moment.A. are repairingB. were repairingC. repairedD. have repaired17.Iceland will completely disappear in the world if we ________ nothing to the environmentA. doB. didC. have doneD. will do18.After receiving an e-mail of apology, the client felt better and stopped ________ any more.A. complainB. to complainC. complainingD. complained19.—Sorry, I’ve got the wrong book. Could you wait a minute?—________A. You are welcome.B. It’s so nice of you.C. All right.D. Congratulations!20.—________—I’m sorry. I don’t really agree with you.A. The cartoon movie is too boring for us.B. Let’s have an outing after the final exam.C. Have you heard about Tom these days?D. Who is the director of our school play?Complete the following passage with the words in the box. Each can only be used once（将下列单词填入空格。
宝山2019学年第一学期期中考试九年级物理试卷
2019学年第一学期期中考试九年级物理试卷（考试时间90分钟 满分100分）题 号 一 二 三 四 五 总 分 得 分一、选择题(共计20分)1．在下列科学家中，以他名字作为浮力单位的 （ ） A ．牛顿。
B ．阿基米德。
C ．帕斯卡。
D ．托里拆利。
2．人的密度约为水的密度，则初中生的体积最接近 （ ） A ．5⨯10-4米3。
B ．5⨯10-3米3。
C ．5⨯10-2米3。
D ．5⨯10-1米3。
3．关于压力，下列说法正确的是 （ ） A ．压力的施力物体一定是地球。
B ．压力与形变一定同时产生。
C ．压力的大小，总是等于重力大小。
D ．压力的方向总是竖直向下。
4．在下列所示的生活和生产实例中（如图1所示），利用阿基米德原理工作的是（ ）5．关于浮力，下列说法正确的是 （ ） A ．上浮的物体所受浮力一定越来越大。
B ．下沉的物体不受浮力。
C ．浮力的方向总是竖直向下。
D ．物体在空气中可能不受浮力。
6．图2为“阿基米德原理”一节的知识结构图，其中(a )(b )(c )(d )四项标有划线的内容中错误的是 （ ）A ．(a )。
B ．(b )。
C ．(c )。
D ．(d )。
得分 评卷学校_______________________ 班级__________ 学号_________ 姓名______________…………………………密○………………………………………封○………………………………………○线…………………………浮力阿基米德原理：当物体全部或部分浸在水中时，它会受到向上的浮力，浮力的大小等于它所排开这部分水所受的重力大小。
产生的原因：液体对浸入其中的物体所施加的向上压力大于向下的压力。
应用：万吨油轮、浮船坞等都是用钢板焊接成空心体。
(d )(b ) (a ) (c ) 图2A ．斧子B ．液体密度计C ．用管子吸饮料D ．锅炉液位计图17．仔细观察图3，可得正确的信息是（ ） A ．纵坐标表示的物理量是重力。
上海市徐汇区2019-2020学年九年级下学期物理中考一模试卷(含答案)
上海市徐汇区2019-2020学年九年级下学期物理中考一模试卷（含答案）一、单选题1.一节干电池的电压是（）A. 220 伏B. 36 伏C. 24 伏D. 1.5 伏【答案】 D【考点】电压和电压的单位换算2.坦克装有宽大的履带是为了（）A. 增大压强B. 增大压力C. 减小压强D. 减小压力【答案】C【考点】减小压强的方法及其应用3.将一根铜导线拉长，变大的是它的（）A. 质量B. 电阻C. 密度D. 横截面积【答案】B【考点】影响电阻大小的因素4.轮船从大海驶入黄浦江，所受的浮力将（）A. 增大B. 减小C. 不变D. 无法确定【答案】C【考点】物体的浮沉条件及其应用5.通过实验研究得出“导体中的电流与导体两端电压关系”的科学家是（）A. 安培B. 伏特C. 瓦特D. 欧姆【答案】 D【考点】物理常识6.对于某一确定的导体，影响该导体电流大小的物理量是（）A. 电压B. 电荷量C. 质量D. 通电时间【答案】A【考点】欧姆定律及其应用7.教室里空气的质量最接近（空气密度约为1.29千克/米3）（）A. 千克B. 10 千克C. 100 千克D. 1000 千克【答案】C【考点】密度公式及其应用8.将电阻R与5欧的电阻并联后总电阻小于1欧，下列判断正确的是（）A. R一定小于1欧B. R一定大于1欧C. R可能大于1欧D. R不可能为1欧【答案】C【考点】电阻的并联9.如图所示，两个盛有等高液体的圆柱形容器A和B，底面积不同（S A＜S B），液体对容器底部的压强相等，现将甲球浸没在A容器的液体中，乙球浸没在B容器的液体中，容器中均无液体溢出，若此时液体对各自容器底部的压力相等，则一定是（）A. 甲球的质量小于乙球的质量B. 甲球的质量大于乙球的质量C. 甲球的体积小于乙球的体积D. 甲球的体积大于乙球的体积【答案】 D【考点】液体压强计算公式的应用10.在图的电路中，电源电压保持不变，电键S由断开到闭合，关于电压表V1与电压表V2示数的变化情况判断正确的是（）A. V1 表的示数变大，V2表的示数变大B. V1表的示数变小，V2表的示数变大C. V1 表的示数变小，V2 表的示数变小D. V1表的示数变大，V2 表的示数变小【答案】B【考点】欧姆定律及其应用，电路的动态分析二、填空题11.家庭电路中，日光灯、电视机等各用电器之间是________连接（选填“串联”或“并联”）；同时使用的用电器越多，电路的总电阻越________，它们消耗的能量用________表测量。
2019-2020学年徐汇区九年级(初三)中考一模英语试卷及答案
徐汇区2019 -2020学年度第一学期期末质量调研英语试卷Part 2 Phonetics, Grammar and Vocabulary（第二部分语音、语法和词汇）Ⅱ. Choose the best answer （选择最恰当的答案）26.Which of the following underlined parts is different in pronunciation?A. robberyB. globalC. spotlessD. horrible27.Never be too proud. There is always room for improvement to become perfect.A. aB. anC. theD. /28.Tom and I both got an e-dictionary. His e-dictionary is cheaper than .A. meB. myC. myselfD. mine29.With great efforts and a strong will, the teenager has made a lot of .A. progressB. achievementC. complaintD. friend30.Some learners listen to BBC to improve English, while may prefer American shows.A. otherB. the otherC. othersD. another31.special idea to show the hot social problems in the movie!A. WhatB. What aC. What anD. How32.To get enough fresh water, people remove salt sea water in some areas.A. intoB. fromC. aboveD. against33.Reading is one of and useful skills a human being can pick up.A. enjoyableB. more enjoyableC. most enjoyableD. the most enjoyable34.The toy company has promised all the models from non-plastic materials.A. makeB. makingC. to makerD. made35.In the past 10 years , the American artist many wonderful cartoon characters.A. createdB. has createdC. was creatingD. had created36.It was said that tea didn’t appear in the western world the early 17th century.A. untilB. sinceC. beforeD. after37.Having too much loud noise around us sometimes make people crazy.A. needB. shouldC. canD. ought to38.According to NASA, in 2024 the first woman on the moon.A. is landedB. was landedC. has been landedD. will be landed39.The F1 driver is hugely talented, he still works hard to achieve his goals.A. soB. butC. ifD. though40.Unlike human beings, cats can’t smile and their looks seem cold and .A. horriblyB. bravelyC. gentlyD. unfriendly41.Sorry for the inconvenience, for the workers the museum at the moment.A. are repairingB. were repairingC. repairedD. have repaired42.Iceland will completely disappear in the world if we nothing to the environment.A. doB. didC. have doneD. will do43.After receiving an e-mail of apology, the client felt better and stopped any more.A. complainB. to complainC. complainingD. complained44.-- Sorry, I’ve got the wrong book. Cou ld you wait a minute? -- .A. You are welcomeB. It’s so nice of you.C. All right.D. Congratulations!45.I’m sorry. I don’t really agree with you.A. The cartoon movie is too boring for us.B. Let’s have an outing after the final exam.C. Have you heard about Tom these days?D. Who is the director of our school play?Ⅲ. Complete the following passage with the words in the box. Each can only be used once（将下列单词填入空格。
20182019学年度第一学期期末质量监测九年级物理试题及答案
2018—2019学年度第一学期期末质量监测九年级物理试题参考答案一.选择题。
本大题共20个小题，共计43分。
1～17小题为单选题，每小题只有一个选项符合题意，每小题2分；18～20小题为多项选择题，每小题中至少有两个选项符合题意，全部选对得3分，选对但不全的得2分，有错选或不选的不得分。
二、填空及简答题。
本大题共9个小题；每空1分，共 24分。
21扩散 无规则 22做功 热传递23化学 内 1.68×10624电流 电压 并250.4 0.5 0.326变大 变小 变小274 55 串2810 16292013.6 0.1 1500三、实验探究题。
本大题共3个小题，第30小题9分，第31小题8分，第32小题4分，共21分.30. （1）如下图（2）断开 B （3）D （4）电压一定时，通过导体的电流与导体的电阻成反比（5）①B 2 ②滑动变阻器的最大阻值过小 A （连线1分，每空1分，共9分）31. （1）如右上图 不亮 无（2）8.3 0.75【评估】错误 灯泡在不同电压下的实际功率不同，求不同电压下功率的平均值是错误的（本题中第1小问中找错误导线1分，补画连线1分，，其余每空1分，共计8分）32. （1）高度差（2）电阻（3）电流（4）电饭锅、电水壶，电暖气，电烙铁任举一例，只要正确即可得分（每空1分，共4分）四、本大题共2小题，第33小题4分，第34小题8分，共12分。
33. 解：（1）()()Jkg kg J t cm Q 531005.120-705.0/102.4⨯=⨯⨯∙⨯=∆=℃℃℃吸……………………………………………………………………………（2分）（2） …………………………（1分）J kg kg J qm Q 57100.301.0/100.3⨯=⨯⨯==放酒精灯的效率： ……………………………（1分）%35%100100.31005.155=⨯⨯⨯==JJ Q Q 放吸η34. 解：（1）由图可知，R 1与R 2并联，电流表A 测干路电流， A 1测阻R 1支路的电流∵并联电路中I=I 1+I 2∴I=0.6A ，I 1=0.2A ………………………………………………………………………（1分）题号12345678910答案D A C B A B B C C B 题号11121314151617181920答案B D B ACD C AC AC BC∴电源电压 ……………………………………（1分）V A R I U U 6302.0111=Ω⨯=== ……………………………………………………（1分）A A A I I I 4.02.06.012=-=-= ………………………………………………………………（1分）Ω===154.0622AV I U R （2）由题意可知，用电阻R 0替换电阻R 1、R 2中的一个，替换前后，只有一个电流表的示数发生了变化，只能是R 0替换电阻R 2，替换前后R 1的功率不变，因为电路的总功率变化了0.6W ，即为R 2支路的功率变化了0.6W ，∴换前R 2的功率 ……………………………………（1分）W A V UI P 4.24.0622=⨯==则替换后R 0的功率…（1分）W W W P W W W P 8.16.04.236.04.2/00=-==+=或∴ …………………………………………………………（1分）()Ω===12362020WV P U R 或 ………………………………………………………（1分）()Ω===208.162/020W V P U R 即R 0的阻值为12Ω或20Ω评分说明：（1）解答时，要求写出必要的文字说明，公式和计算步骤，只写出最后结果不得分。
2019-2020学年上海市黄浦区九年级上学期期末考试：物理
1.上海地区家用电冰箱的正常工作电压是（）。
A.110伏B.200伏C.220伏D.380伏2.首先发现电流与电压关系的科学家是（）。
A.安培B.库仑C.伏特D.欧姆3.铁轨下面垫枕木是为了（）。
A.增大压力B.增大压强C.减小压力D.减小压强4.下列装置中，主要利用连通器原理工作的是（）。
A.液位计B.抽水机C.订书机D.密度计5.一根铁丝被拉长后，下列物理量会发生变化的是（）。
A.密度B.质量C.电阻D.体积6.重为5牛的小球轻放入盛有水的烧杯中，溢出重为4牛的水。
若将该小球轻放入盛有酒精的烧杯中，已知，则溢出酒精的重力大小（）。
A.一定小于4牛B.可能等于5牛C.一定等于4牛D.可能大于5牛7.在图1（）、（）所示的电路中，所有元件均完好，电源电压相等且保持不变。
已知、、为定值电阻，为滑动变阻器（滑片在中点附近某位置），现有两个电流表的示数相同，则下列判断正确的是（）。
①与示数相同，②与示数相同，③与示数相同，④与示数相同，A.①和②B.②和③C.③和④D.①和④8.如图2（）所示，底面积不同的圆柱形容器分别盛有甲、乙两种液体，其密度为和。
已知液体对各自容器底部的压强相等。
现将甲、乙液体互换容器（均不溢出），如图（）所示，甲、乙液体对容器底部压强的变化量分别为、，则（）。
A.，B.，C.，D.，9.家庭电路中各用电器之间是（选填“串联”或“并联”）连接的。
使用的用电器增多，电路的总电流，电路的总电阻。
（均选填“变大”、“不变”或“变小”）10.压强是表示的物理量。
深海潜水器有下潜深度限制，是由于海水内部，著名的实验向人们展示了大气压强存在。
1.冰的密度为，它的含义是每立方米冰的为。
现有的冰融化成水，融化后体积（选填“变大”、“不变”或“变小”），水的质量为千克。
12.如图3（）所示，长度相同、粗细不同的同种金属棒和串联在电路中。
则通过的电流（选填“大于”、“等于”或“小于”）通过的电流。
用电压表测得和两端的电压如图（）所示，则两端的电压为伏，两端电压为伏。
上海市徐汇区2020届九年级上学期期末(一模)质量监控英语试卷(Word原卷版 )
徐汇区2019~2020学年度第一学期期末质量调研初三英语2020.1（满分：150 分，考试时间：150分钟）考生注意：本卷有7大题。
共94 小题。
试题均采用连续编号，所有答案务必按照规定在答题纸上完成，做在试卷上不给分。
Part 1 Listening （第一部分听力）I. Listening comprehension (听力理解) (共30 分)A. Listen and choose the right picture (根据你听到的内容，选出相应的图片) (6 分)A B C DE F G H1. __________2. __________3. __________4. __________5. __________6. _________B.Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题，选出最恰当的答案): (8分)（）7. A. A doctor. B. A director. C. A painter. D. An actress.（）8. A. Maths. B. Physics. C. Music. D. History.（）9. A. Last Monday. B. Last Tuesday. C. Last Thursday.D. Last Sunday.（）10. A. At 1:30 p.m. B. At 2:00 p.m. C. At 2:30 p.m. D. At 3:00 p.m.（）11. A. On the Internet. B. In the concert hall.C. At the box office.D. From the club.（）12. A. To the supermarket. B. To the post office.C. To the garden.D. To the restaurant.（）13. A. Father and daughter. B. Assistant and customer.C. Doctor and patient.D. Detective and client.（）14. A. The environment of the flat. B. The passengers in the underground.C. The work in the office.D. The traffic to work.C．Listen to the passage and tell whether the following statements are true or false (判断下列句子是否符合你听到的内容, 符合的用“T”表示，不符合的用“F”表示): (6分)（）15. Phillip saved a baby boy when he was camping near North Island’s Bay.（）16. There was a holiday camp near New Zealand’s North Island’s Bay.（）17. It was careless of the parents to leave the baby in the tent alone that morning.（）18. After the parents looked for the baby for hours, the boy was back finally.（）19. It was amazing that the baby boy wasn’t hurt at all in the adventure.（）20. Philip is a hero because he has saved a life in his lifetime of catching fish.D. Listen to the passage and complete the following sentences (听对话，完成下列内容，每空格限填一词): (10分)21. The second-hand finds in the passage are _______ _______, bicycles, toys andphoto frames.22. One of the questions you ask the seller is, “Do you keep _______ _______?”23. Many wooden toys are of _______ _______, and they are good enough to be passedon.24. Try not to buy _______ _______ and stuffed (填充的) animals, for they are hard toclean.25. Altogether there are _______ _______ for buying things at a garage sale or yard sale.Part 2 Phonetics, Grammar and Vocabulary(第二部分语音、语法和词汇)II. Choose the best answer (选择最恰当的答案): (共20分)（）26. Which of the following underlined parts is different in pronunciation?A. robberyB. globalC. spotlessD. horrible（）27. Never be too proud. There is always _____ room for improvement to become perfect.A. aB. anC. theD. /（）28. Tom and I both got an e-dictionary. His e-dictionary is cheaper than _____.A. meB. myC. myselfD. mine（）29. With great efforts and a strong will, the teenager has made a lot of ______.A. progressB. achievementC. complaintD. friend（）30. Some learners listen to BBC to improve English, while _____ may prefer American shows.A. otherB. the otherC. othersD. another（）31. _____ special idea to show the hot social problems in the movie!A. WhatB. What aC. What anD. How（）32. To get enough fresh water, people remove salt _____ sea water in some areas.A. intoB. fromC. aboveD. against（）33. Reading is one of ________ and useful skills a human being can pick up.A. enjoyableB. more enjoyableC. most enjoyableD. the mostenjoyable（）34. The toy company has promised ________ all the models from non-plastic materials.A. makeB. makingC. to makeD. made（）35. In the past 10 years, the American artist ________ many wonderful cartoon characters.A. createdB. has createdC. was creatingD. had created（）36. It was said that tea didn’t appear in the western world ________ the early 17th century.A. untilB. sinceC. beforeD. after（）37. Having too much loud noise around us ________ sometimes make people crazy .A. needB. shouldC. canD. ought to（）38. According to NASA, in 2024 the first woman ________ on the moon .A. is landedB. was landedC. has been landedD. will belanded（）39. The F1 driver is hugely talented, ________ he still works hard to achieve his goals.A. soB. butC. ifD. though（）40. Unlike human beings, cats can’t smile and their looks seem cold and ________.A. horriblyB. bravelyC. gentlyD. unfriendly（）41. Sorry for the inconvenience, for the workers ________ the museum at the moment.A. are repairingB. were repairingC. repairedD. have repaired（）42. Iceland will completely disappear in the world if we ________ nothing to the environment.A. doB. didC. have doneD. will do（）43. After receiving an e-mail of apology, the client felt better and stopped________any more.A. complainB. to complainC. complainingD. complained（）44. --Sorry, I’ve got the wrong book. Could you wait a minute?-- ________A. You are welcome.B. It’s so nice of you.C. All right.D. Congratulations!（）45. --________-- I’m sorry. I don’t really agree with you.A. The cartoon movie is too boring for us.B. Let’s have an outing after the final exam.C. Have you heard about Tom these days?D. Who is the director of our school play?III. Complete the following passage with the words or phrases in the box. Each word or phrase can only be used once（将下列单词或词组填入空格。
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2019学年第一学期徐汇区学习能力诊断卷初三物理试卷2020.1（考试时间：90分钟满分100分）注意：所有题目请回答在答题卷上相应位置。
一、单项选择题（共20分）1．物理学中以科学家瓦特的名字作为单位的物理量是A ．电压B ．电功率C ．电流D ．电阻2．生活中很多装置运用了物理知识，利用连通器原理工作的是A ．液位计B ．密度计C ．滑雪板D ．吸尘器3．一个鸡蛋的质量约为A ．5千克B ．0.5千克C ．0.05千克D ．0.005千克4．载重汽车有很多车轮是为了A ．增大压力B ．减小压力C ．增大压强D ．减小压强5．两个导体串联后的总电阻大于其中任何一个导体的电阻，因为串联相当于A ．减小了导体长度B ．减小了导体横截面积C ．增大了导体长度D ．增大了导体横截面积6．图1为金属导体中自由移动电荷的示意图，图中定向移动的是A ．自由电子B ．正电荷C ．正离子D ．负离子7．将两只形状完全相同的密度计甲、乙分别放入不同液体A 、B 中，液体密度ρA >ρB ，静止后如图2所示，两只密度计所受浮力F 的大小关系是A ．F 甲＜F 乙B ．F 甲=F 乙C ．F 甲＞F 乙D ．无法确定8．在图3所示的电路中，电源电压保持不变。
闭合开关S ，向左移动滑动变阻器滑片P 的过程中，变大的是A ．电流表A 与A 1示数的差值B ．电压表V 示数与电流表A 1示数的比值C ．电压表V 示数与电流表A 1示数的乘积D ．电压表V 示数与电流表A 示数的乘积9．如图4所示，实心均匀正方体甲、乙放置在水平地面上，它们对地面的压强相等。
现沿竖直方向切去相同厚度d 后，并将切去部分放置在对方剩余部分的上表面，它们对地面的压强变为p 甲、p 乙，则A ．p 甲一定大于p 乙B ．p 甲可能小于p 乙C ．p 甲D ．p 甲可能等于p 乙SR 1R 2P AV图3A 1图2电源用电器+–图1乙甲图4dd10．如图5所示，水平面上的圆柱形容器A、B中分别盛有等体积的甲、乙两种液体，两个完全相同的小球分别浸没在两种液体中，液体对各自容器底的压强相等。
若将小球从两液体中取出，则甲、乙液体对容器底部的压强变化量Δp和压力变化量ΔF的大小关系是A．Δp甲＞Δp乙，ΔF甲＞ΔF乙；B．Δp甲＞Δp乙，ΔF甲＝ΔF乙；C．Δp甲=Δp乙，ΔF甲＜ΔF乙；D．Δp甲=Δp乙，ΔF甲＞ΔF乙。
二、填空题（共26分）11．上海地区家庭电路的电压为（1）伏，台灯与空调是（2）连接的（选填“串联”或“并联”）；家用手电筒内小电珠额定功率为1瓦特，这表明家用手电筒正常工作时，每秒有（3）焦的电能转化为内能和光能。
12．意大利科学家（4）首先测定了大气压强的值；大气压强的大小还与海拔高度有关，海拔高度越高，空气越（5）（选填“稠密”或“稀薄”），大气压强就越（6）。
13．物理知识在生活中有广泛的应用，如图6（a）所示的装置是利用了（7）的知识；如图6（b）所示的船闸是利用（8）原理工作的；如图6（c）金属锥的头部尖细锋利，是为了能产生很大的（9）；如图6（d）所示的热气球相当于全部浸没于空气中中，所以根据（10）原理，它在空气中受到了很大的浮力。
14．某导体两端的电压为6伏，电阻为10欧，通过该导体的电流为（11）安，5秒内通过它某个横截面的电荷量为（13）库，电流做功（14）焦；若将该导体两端的电压调整为12伏，则该导体的电阻为（12）欧。
15．一薄壁圆柱形容器盛有水，用弹簧测力计竖直吊着重为10牛的实心物块A从图7（a）所示位置开始，缓慢浸入水中，最终物块A静止在图7（b）所示位置，弹簧测力计示数为6牛。
此过程中水对物体下表面的压力（15），容器对水平地面的压力（16）（上述两空均选填“始终变大”、“先变大后不变”，“始终变小”或“先变小后不变”）；最终物块A受到的浮力为（17）牛，初末两个状态水对容器底部的压力增加量为（18）牛。
16．在图8所示电路中，电源电压为U且保持不变。
已知电路中仅有一处故障，且只发生在电阻R1、R2上。
开关S闭合前后，两电压表指针所在的位置不变。
请根据相关信息写出两电压表的示数及相对应的故障（19）.A B图5图8R1V2SR2V1（a）吸盘挂钩（b）船闸（c）锥子（d）浮在空中的热气球图617．某物理兴趣小组查阅资料得知：在污水或污泥中插入不同金属制成的极板，就可以制成一个“微生物电池”。
于是，他们选用不同金属作为极板插入污泥中进行微生物电池实验，如图9所示，始终保持两块极板之间的距离不变，用电压表直接测量两块极板之间的电压。
然后仅改变两极板插入污泥深度，记录两块极板之间的电压，数据如表格中所示。
序号两块极板材料插入污泥深度（厘米）电压表（伏）1铜片—锌片20.62铜片—锌片60.83铁片—铜片20.44铁片—铜片60.5请根据上述信息回答：①若其它条件不变，将图9中的锌片换成铜片，电压表将（20）（选填“有”、“无”）示数。
②分析比较实验序号1、2或3、4，可得出的初步结论是：当两块极板之间的距离不变时，(21)。
③分析比较实验序号1、3或2、4，可得出的初步结论是：当两块极板之间的距离不变时，(22)。
三、作图题（共8分）18．重为2牛的小球悬浮在水中，请在图10中用力的图示法画出小球所受的浮力。
19．在图11中的〇里填上适当的电表符号，使之成为串联电路图。
20.如图12所示，请用笔画线代替导线正确连接电路，要求：灯L 1和灯L 2并联，电流表测量通过灯L 1的电流。
四、计算题（共26分）21．矿石中提炼出0.38千克的金属，测得该金属的体积为5×10-5米3，求该金属密度ρ。
SSR 2R 1图10图11图12图922．在图13所示的电路中，定值电阻R 1的阻值为5欧，电源电压为3伏且保持不变，开关S 闭合。
①求通过电阻R 1的电流。
②再闭合开关S 1，电流表A 的示数为0.9安。
求电路消耗的总的电功率P 。
23．在如图14（a ）所示的电路中，电源电压为6伏且保持不变，电阻R 1的阻值为20欧，滑动变阻器上标有“50Ω2A ”字样。
闭合开关，当变阻器滑片位于某位置时，电流表的示数为0.2安。
求：①此时R 1两端的电压U 1。
②现用电阻R 0替换电阻R 1，闭合开关，当变阻器滑片位于某位置时，电压表的示数如图（b ）所示，移动滑动变阻器滑片到另一位置，电流表的示数如图（c ）所示。
求替换电阻R 0的阻值范围。
R 1S 1R 2图13A（a ）图14APSR 2R 1V（b ）（c ）--0.6S24．如图15所示，两个完全相同的底面积为1×10-2米2的轻质薄壁圆柱形容器A 、B 放在水平桌面上（容器足够高），另有两个完全相同的圆柱体甲、乙，圆柱体的底面积是容器底面积的一半。
A 中盛有质量为5千克的水，B 中放置圆柱体乙。
求：①水对容器A 底部的压强p 。
②容器A 中水的深度h 。
③若通过两种方法分别增大容器对水平桌面的压强和液体对容器底部的压强，并测出容器对水平桌面的压强变化量∆p 容、水对容器底部的压强变化量∆p 水，如下表所示。
方法a ：圆柱体甲放入盛有水的容器A 中；方法b ：向放置圆柱体乙的容器B 加入质量为5千克的水；i.请根据表中的信息，通过计算判断方法a 、b 与表中方法I 、II 的对应关系，以及圆柱体的质量m ；ii.请判断甲在水中的状态并说明理由【提示：漂浮、悬浮、沉底（浸没、未浸没）等】。
方法容器对水平桌面的的压强变化量∆p 容（帕）水对容器底部的压强变化量∆p 水（帕）I 49007840II58802940图15图17A 2R 1SA R 2图18（a ）A 1五、实验题（共20分）25．“测定物质的密度”的实验原理是（1），通常测量质量的仪器是（2），测量非规则物体体积的仪器是（3）。
在“探究物质质量与体积的关系”实验中，为了得出普遍规律，要多次测量不同体积同种物质的质量，并选择（4）物质进行多次实验。
26．图16所示的是“验证阿基米德原理”实验，其中“步骤D ”测量的是：桶和（5）的重力；为实现实验目的，图中弹簧测力计的四个示数值F 1、F 2、F 3、F 4应满足关系式是（6）。
图17所示的装置叫做（7）。
若用手按压金属盒上的橡皮膜，两管中液面将（8）（选填“相平”或“不相平”）。
27．某小组同学为了“探究并联电路电流和电阻的规律”，他们进行了如下实验。
①探究并联电路中电流的规律时，设计了如图18（a ）所示电路图，闭合开关后，测出实验数据记录在表一中。
表一序号A 1示数（安）A 2示数（安）A 示数（安）10.200.300.50该小组同学分析实验数据，得出的初步结论是：在并联电路中，干路中的电流等于（9）。
为了使实验结论更具有科学性，你认为他们下一步骤应该做的是：（10）。
A ．改变电源电压，再测量几组数据B ．改变电流表的量程，再测量一组数据C ．用不同阻值的定值电阻替换原定值电阻，再测量几组数据②探究并联电路中电阻的规律时，他选用定值电阻R 1为10欧，R 2为15欧接入如图18（a ）所示电路图中，闭合开关S ，记录相应电流表的示数。
然后他们把阻值不相同的若干定值电阻R 0先后接入如图18（b ）所示电路（11）图中（选填“A ”、“B ”或“C ”），当电源（12）保持不变时，观察到电流表（13）的示数保持不变（选填“A 1”、“A 2”或“A ”），说明这个起替代作用的定值电阻R 0就是这个并联电路的总电阻。
A ．测出被测物块的重力C ．测出物块浸在液体中时受到的拉力B ．测出空桶的重力D ．测出桶和……的重力图16F 1F 2F 3F 4③接下来该小组同学“用电流表、电压表测电阻”的方法测定值电阻R 0的阻值，现有电源（电压为1.5伏的整数倍且保持不变）、电流表、电压表、滑动变阻器R 、电键及导线若干，所有元件均完好。
连接电路进行实验，闭合开关后，将变阻器滑片从一端移动到另一端的过程中，发现电流表示数的变化范围为0.24安～1.2安，电压表示数相应的变化范围为6.0伏～0伏。
当变阻器滑片移动到中点附近位置时，电流表示数0.42安，电压表的示数如图18（c ）所示。
I 、该实验的原理是（14）。
II 、实验中使用的滑动变阻器的最大电阻为（15）欧，电源电压为（16）伏。
III 、请将表格二填写完整。
（计算电阻时，精确到0.1欧）。
（17）表二物理量实验序号电压(伏)电流(安)电阻(欧)10.2420.4231.2图18（c ）A 2R 0S A R 2AA 1A 2R 1S A R 0BA 1CAR 0S图18（b ）。