杨浦区2019学年度第一学期期末质量调研
2019学年上海市杨浦区九年级上学期期末质量调研化学试卷【含答案及解析】
2019学年上海市杨浦区九年级上学期期末质量调研化学试卷【含答案及解析】姓名___________ 班级____________ 分数__________一、选择填充题1. 下列变化属于化学变化的是A. 冰雪融化B. 煤气燃烧C. 金桂飘香D. 尘土飞扬2. 下列物质属于纯净物的是A. 食醋B. 液氮C. 空气D. 石油3. 碘酸钙是一种补碘、补钙的添加剂,其化学式为 Ca ( IO 3 ) 2 , 碘酸钙中碘元素的化合价是()A. + 5B. +1C. -1D. +74. 人体中含量最多的元素是A. CuB. CC. HD. O5. 属于单质的是A. 水B. 氯气C. 干冰D. 氯酸钾6. 四种植物花汁在不同溶液这呈现的颜色如下表。
若要检测某溶液的酸碱性,最好选用p7. pH < 7 = 7 > 7 玫瑰花汁粉红粉红绿万寿菊花汁黄黄黄大红花汁橙粉红绿万年青花汁橙黄浅绿浅绿<p>A. 玫瑰花汁B. 万寿菊花汁C. 大红花汁D. 万年青花汁8. 石墨和 C 60 的化学性质相似,物理性质却有很大差异。
其原因是A. 碳原子的排列方式不同B. 构成它们的原子数目不同C. 由不同种原子构成D. 构成它们的原子大小不同9. 对比是学习化学的重要方法,下列关于 CO 2 与 CO 的比较,错误的是()A. CO 2 可用于人工降雨, CO 可用于光合作用B. 通常情况下, CO 2 能溶于水, CO 难溶于水C. CO 2 无毒, CO 易与血液中的血红蛋白结合引起中毒D. 一个二氧化碳分子比一个一氧化碳分子多一个氧原子10. 下列实验现象描述正确的是A. 点燃一氧化碳,发出蓝色火焰B. 硫在空气中燃烧,发出蓝紫色火焰C. 铁丝在空气中燃烧时,火星四射D. 水电解时,产生了氢气和氧气11. 下图表示初中化学常见实验操作,其中正确的是A. AB. BC. CD. D12. 氧气在一定条件下变成淡蓝色液体,此过程中发生变化的是()A. 氧分子的体积B. 氧分子的间隔C. 氧气的化学性质D. 构成氧分子的原子13. 在家庭小实验中,不能达到预期目的的是A. 品尝——鉴别白糖和食盐B. 观察——鉴别精白面粉和淀粉C. 闻气味——鉴别白酒和白醋D. 点燃——鉴别氧气和天然气14. 有关氧气的制取、收集、验满、性质的实验中错误的是A. 制取B. 收集C. 验满D.性质15. 某气体常温下不与空气中的成分反应,密度比空气小,极易溶于水,正确收集该气体的方法是A. AB. BC. CD. D16. 有关粗盐提纯的实验操作合理的是A. 溶解前用玻璃棒研磨大颗粒粗盐B. 过滤时液体的液面要低于滤纸边缘C. 加热蒸发时要不断搅拌直至水分全部蒸干D. 实验结束随即用手将蒸发皿从三角架上取下17. 如果配制 6% 的氯化钠溶液的溶质质量分数偏小,其原因是A. 称取的氯化钠固体质量偏大B. 转移称量好的氯化钠固体时,有少量洒落在桌面上C. 量取水的体积偏小D. 转移配制好的溶液时,有少量液体溅出18. 根据某燃料 X 完全燃烧的化学方程式: X+3O 2 2CO 2 +3H 2 O ,判断错误的是A. X 的化学式为 C 2 H 6 OB. X 是有机物C. 化学方程式中各物质的系数比与物质的量之比相等D. 该反应前后分子的个数没有发生改变19. 甲物质的溶液可用作花肥、电镀液等。
杨浦区2019学年度第一学期期末初三质量调研(语文试卷)
杨浦区2019学年度第一学期期末初三质量调研语文试卷(满分150分考试时间100分钟)2019年12月[考生注意:本巻共有26题。
请将所有答案写在答卷上,写在试卷上不计分]一、文言文阅读(共40分)(一)默写(16分)1.几处早莺争暖树,。
(《钱塘湖春行》)2.欲为圣朝除弊事,。
(《左迁至蓝关示侄孙湘)》)3.,带月荷锄归。
(《归园田居》)4.,盖以诱敌。
(《狼》)5.《陋室铭》中表现主人公交往之雅的句子是,。
(二)阅读下面古诗文,完成6—9题(12分)【甲】行路难(其一)金樽清酒斗十千,玉盘珍羞直万钱。
停杯投箸不能食,拔剑四顾心茫然。
欲渡黄河冰塞川,将登太行雪满山。
闲来垂钓碧溪上,忽复乘舟梦日边。
行路难,行路难,多歧路,今安在?长风破浪会有时,直挂云帆济沧海。
【乙】醉翁亭记(节选)若夫日出而林霏开,云归而岩穴暝,晦明变化者,山间之朝暮也。
野芳发而幽香,佳木秀而繁阴,风霜高洁,水落而石出者,山间之四时也。
朝而往,暮而归,四时之景不同,而乐亦无穷也。
6.甲诗作者为代诗人,乙文作者为文学家。
(4分)7.用现代汉语翻译下面的句子。
(3分)日出而林霏开,云归而岩穴暝8.下面选项恰当..的一项是()。
(2分)A.甲诗起首两句以夸张手法叙写欢乐豪放的宴饮,体现作者与友人相处时的愉悦心情。
B.乙文作者细致描绘山间一日及四时的自然风光,体现其寄情山水乐无穷的怡然自得。
C.甲诗具体描绘渡黄河登泰山时艰难困顿的遭遇,形象体现了诗歌“行路难”的主题。
D.乙文具体描绘琅琊山朝暮与四季景色之美,意在表现作者对醉翁亭秀丽环境的欣赏。
9.教材将甲诗和乙文编入同一单元,意在告诉我们,人生中难免种种,对此,我们要、地面对。
(3分)(三)阅读下文,完成10-13题(12分)刘宣苦读成才景泰间,吉安刘公宣①代戍于京师龙骧卫,为.卫使②蓄马,昼夜读书厩中,使初不知也。
公偶与塾师论《春秋》,师惊异之,以语使,使乃优遇之。
未几,发解及第③……取解时,刘文恭公铉④主试,讶其文,谓必.山林老儒之作,及启封,乃公也,人始识公,而文恭知人之益.著。
杨浦区2019学年物理第一学期期末质量调研
杨浦区2019学年第一学期期末质量调研初三物理练习卷 2019.12(满分100分,时间90分钟)一.选择题(共20分)1.一节干电池的电压为()A. 220伏B. 24伏C. 3伏D. 1.5伏2.下列实例中,属于利用连通器原理工作的是()A.抽水机B. 密度计C. 吸尘器D. 液位计3.下列物理量中,能影响导体电阻大小的是()A. 电压B. 电流C. 长度D. 电功率4.在如图所示的实例中。
增大压强的是()A. B. C. D刀刃磨得很薄滑雪用的滑板铁轨下铺枕木书包背带加宽5.下列事例中,运用的科学研究方法相同的是( )(1)探究液体内部压强与液体密度的关系(2)测定物质密度(3)探究串联电路中电阻的规律(4)探究物质质量与体积的关系。
A. (1)与(3)B. (1)与(4)C. (2)与(4)D. (3)与(4)6.将电阻R1与R2电阻并联后,它们的总电阻等于10欧。
下列判断中正确的是()A. R1一定小于10欧B.R1可能等于10欧C. R2一定大于10欧D. R2可能为10欧7.有一个装满水的柱形容器,已知容器内水的重力是10牛,现在向容器内放入一个重为4牛的物体,溢出水的重力是1牛。
此时水对容器底部的压力为()A.9NB.13NC.10ND.3N8.两个相同的柱形容器置于水平地面,容器内装有体积相等的不同液体甲,乙。
取两块相同的橡皮泥,将一块做成碗状放入甲,另一块捏成球形放入乙内,橡皮泥静止后如图所示,以下判断正确的是()A.液体密度ρ甲>ρ乙B.液体对容器底部压强p液甲<p液乙C.橡皮泥受到的浮力F甲<F乙D.容器对地面的压强p地甲>p地乙9. 在图3所示的电路中,电源电压保持不变,当滑动变阻器R 1的滑片P 由中点向右端移动时,变大的是A.电压表V 的示数B.电压表V 示数与电流表A 示数的比值C.电流表A 的示数D.电压表V 示数与电流表A 示数的乘积图3 图410.完全相同的圆柱体甲、乙置于水平地面上,将圆柱体分别置于它们的上方,甲、乙上表面受到的压强相等,如图4所示。
杨浦区中考一模-2019学年度第一学期期末质量调研初三英语练习卷(附答案)
杨浦区2019学年度第一学期期末质量调研初三英语练习卷2019.12Part 1 Listening(第一部分听力)Ⅰ. Listening ComprehensionA. Listen and choose the right picture.1. ______2. ______3. ______4. ______5. ______6. ______B. Listen to the dialogue and choose the best answer to the question you hear.7. A. Red B. Blue C. Green D. Grey8. A. By bus B. By taxi C. By car D. By train9. A. Since 2011 B. Since he was 12 C. For 10 ten years D. For 19 years10. A. At the supermarket B. At the hospitalC. At the fire stationD. At the police station11. A. He fell down while hiking. B. An animal bit him.C. He had a car accident.D. He walked too much.12. A. Borrowing books. B. Placing an order.C. Applying for a job.D. Talking about grades.13. A. They will use an online map. B. They will ask the librarian.C. They will check on the Internet.D. They will look at a poster.14. A. He studied for the science test. B. His brain was badly hurt.C. His mother’s car broke down.D. He was stuck in the lift.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短文内容,符合的用“T”表示,不符合的用"F"表示)15. Harry Jackson, a builder and burger, was born in London in 1861.16. Fingerprints weren't used by the police until the beginning of the 20th century.17. In 1901, Harry broke into a house but wasn't caught in the act of stealing.18. Harry was finally caught because of the fingerprints he left on the wall.19. Harry had to spend seven years in prison for stealing a ball from a house.20. The story is mainly about how technology helped the police catch Harry Jackson.D. Listen to the passage and complete the following sentence. (听短文,完成下列内容,每空格限一词)21. The course is for teenagers who are _______ _______ working on the radio.22. The first course starts on June 25th, and the last one is on _______ _______.23. Campers will learn how to use radio equipment and write ________ _______ for young actors.24. A singer who's just finished a _________ ________ will come to the camp.25. For anyone who books before midnight, the cost will only be _______ ________.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 in different in pronunciation?A. recentB. methodC. respectD. enemy27. My mother was angry _________ me because I opened her computer but couldn’t put it back.A. forB. toC. withD. by28. My cat is great: she plays much _________ than my big, noisy dog.A. quietlyB. more quietlyC. most quietlyD. the most quietly29. _________ sick need to be looked after, so money must be spent on hospitals.A. AB. AnC. TheD. /30. I’ve got two cars. _________ of them is in very good condition, I’m afraid.A. BothB. NeitherC. AllD. None31. My neighbor doesn’t seem very _________. She always ignores my greeting and avoids me.A. politelyB. happilyC. patientlyD. friendly32. Our room is always a mess. My roommate never puts _________ away.A. somethingB. anythingC. everythingD. nothing33. We usually go for a walk after supper if there _________ a good program on TV.A. isn’tB. wasn’tC. won’t beD. wasn’t going to be34. The first computers _________ the 1940s were bigger than cars.A. inB. onC. atD. since35. While his friends _________ for him, they heard a scream.A. waitB. are waitingC. waitedD. were waiting36. -- _________ I do the exam this year or next year? What do you think?-- Next year would be better.A. CanB. MustC. NeedD. Should37. We heard a strange noise from upstairs, _________ I phoned the police.A. butB. orC. soD. for38. Judy _________ going for a walk, but no one else wanted to.A. agreedB. offeredC. promisedD. suggested39. My purchases were three weeks late. I had expected the goods _________ on time.A. arriveB. arrivingC. arrivedD. to arrive40. Every year billions of tons rubbish _________ in Europe. Are you shocked by this?A. producesB. are producedC. be producedD. has produced41. The chemicals in cola will be bad for your teeth _________ you clean them carefully.A. unlessB. so thatC. whenD. although42. Wow, _________ amazing vase! The artist must have spent a lot of time on it.A. whatB. what aC. what anD. How43. -- _________ did the Greeks enter Troy? -- They hid in a wooden horse.A. HowB. WhereC. WhenD. Why44. -- Sorry about the mess I made in your kitchen. I’ll clean it up.-- _________ The cleaning lady will do that later.A. You’re welcome.B. That’s too bad!C. Oh, it doesn’t matter.D. Be careful, please.45. -- _________ - Yes, please. That’s very kind of you.A. What about seeing a play tonight?B. Shall I help you with the dishes?C. Would you mind passing me the salt?D. May I use your mobile phone?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。
上海市杨浦区2019届高三3+1期末质量调研考试语文试题(含答案)
杨浦区2019学年度第一学期期末高三年级“3+1”质量调研语文学科试卷2019.1(答案做在答题卡上)(满分150分,时间150分钟)一、阅读(一)阅读下文完成1-6题。
(17分)(1)艺术当然不是哲学,而且在一般人看来艺术应该是哲学的反面。
但艺术和哲学有一个不应忽略的相似之处,就是它们都不能吃不能穿,即没有功利的效用,可人类就产生了它们,而且文明程度越高,它们的地位也就越高。
人在解决了温饱之后,就会追问宇宙和人生的意义,艺术、宗教和哲学是人类追索这类问题的途径。
(2)哲学不是艺术,却也能像艺术一样给人以美感,什么是哲学?康德把哲学分为“学院哲学”和“世界哲学”,前者是大学里教授们的所谓专业哲学,讲究逻辑判断和推理论证,讲究命题演绎和语词分析等等。
而世界哲学则不然,它关心人生的意义和目的,关心人类的命运和世界的现在和未来。
人活着意义何在?这个世界到底是怎么回事?这些就是基本的哲学问题。
世界哲学所关心的问题,并一定要用哲学方式去追求,去探讨,用艺术的方式,同样可以去追求、去探讨。
(3)什么是艺术?艺术一词在西方语言中最初的意思是技艺。
中国古代也有艺术一词,对艺术的理解也是技艺、技能。
但是人们渐渐明白艺术和技艺不是一回事。
艺术不可能是任何一种技艺,艺术家当然必须具备一定的专门化形式的技能和技巧,他获得这种技巧就和工匠一样,部分是通过个人经验,部分是通过分享他人经验。
()单凭由此获得的技巧并不会使一个人成为艺术家。
()一个技师可能造就,而一个艺术家却是天生的。
对于艺术是什么的问题,很多人会回答艺术就是娱乐。
今天,在艺术名下从事的绝大部分活动,其实就是娱乐。
但艺术不是娱乐,娱乐只是艺术在某些时候产生的一种效能。
艺术家们把艺术看作是他们思索世界和探索人生基本问题的途径。
艺术是用诉述感情的方式来表达思想,同时又是有思想的表达感情,而思想就必然与哲学有关,如小说、影视作品等。
(4)哲学因艺术而可爱,艺术因哲学而伟大,一切伟大的艺术之所以伟大,就是因为它们以自己的方式体现了某种哲学思想。
杨浦区2019学年度第一学期期末质量调研 (125)
A.R1 一定小于 10 欧
B.R1 可能为 10 欧
C.R2 一定大于 10 欧
D.R2 可能为 10 欧
7. 有一个装满水的柱形容器,已知容器中水的重力为 10 牛,现在容器中放入一个重为
4 牛的物体,溢出水的重力为 1 牛。则此时水对容器底的压力为
A.9 牛
B.13 牛
C.10 牛
D.3 牛
8. 两个相同的柱形容器置于水平地面,容器中分别盛有相等体积的不同液体甲、乙。
图5
初三物理 本卷共 6 页 第 2页
17. 在图6所示电路中,电源电压为U0且保持不变。闭合开关
R2
S
S,电路正常工作。一段时间后,观察到一个电压表示数变小。
V1
在电路中正确连接一个障,且只发生在电阻R1、R2上,请根据以上信息写出
V2
两电压表示数及相对应的故障。
初三物理 本卷共 6 页 第 3页
四、计算题(共 26 分)
22. 如图 12 所示,重为 19.6 牛的物块 A 静止在水中,此时弹簧测力
计的示数为 4.9 牛。
① 求物块 A 受到的浮力 F 浮。 ② 求物块 A 的体积 V 物。
A 图 12
23. 在图 13(a)所示的电路中,电源电压为 6 伏,滑动变阻器 R2 上标有“100Ω 1A” 字样。开关 S 断开时,电流表 A 示数如图 13(b)所示。
图7
图8
① 根据表中数据,可得初步结论是:
(20)
。
② 小王看了小李的实验数据后,再对照课本上的结论,如图 8 所示,认为小李的实
验数据是错的。你认为小王的判定是否合理,请简要说明理由
(21)
。
三、作图题(共 8 分) 19. 在图 9 中,重为 4 牛的物块静止在水平桌面中央,请根据给定的标度用力的图示法
【精编】【九上期末.语文】上海市杨浦区2019届九年级上册第一学期末考试语文试题含答案.doc
杨浦区2019学年度第一学期期末初三质量调研语文试卷(满分150分考试时间100分钟)[考生注意:本卷共有27题。
请将所有答案写在答卷上,写在试卷上不计分]一、文言文阅读(共40分)(一)默写(15分)1.当年万里觅封侯,。
(《诉衷情》)2.,此日中流自在行。
(《观书有感(其二)》)3.,铁马冰河入梦来。
(《十一月四日风雨大作》)4.一狼洞其中,。
(《狼》)5.盖一岁之犯死者二焉,。
(《捕蛇者说》)(二)阅读下面的词,完成6—7题(4分)天净沙·秋孤村落日残霞,轻烟老树寒鸦,一点飞鸿影下。
青山绿水,白草红叶黄花。
6.下列判断正确的一项是()(2分)A.本曲作者为元代杂剧家白朴B.本曲题目为“天净沙·秋”C.本曲被誉为“秋思之祖”D.本曲被视为“元人小令最佳”7.下列对这首词理解不恰当的一项是()(2分)A.本曲通过对十二种景物的描绘,含蓄地表达作者情感变化过程。
B.本曲描写景物既有动景又有静景,可谓是动静结合,相得益彰。
C. 本曲描写景物由远及近,通过视角的变化,多层次地铺排秋意。
D. 本曲一扫传统诗词悲秋格局,展现了秋日璀璨斑斓的丰富色调。
(三)阅读下文完成8—10题(9分)桃花源记(节选)林尽水源,便得一山。
山有小口,仿佛若有光。
便舍船,从口入。
初极狭,才通人。
复行数十步,豁然开朗。
土地平旷,屋舍俨然,有良田、美池、桑竹之属。
阡陌交通,鸡犬相闻。
其中往来种作,男女衣着,悉如外人。
黄发垂髫,并怡然自乐。
见渔人,乃大惊,问所从来,具答之。
便要还家,设酒杀鸡作食。
村中闻有此人,咸来问讯。
自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。
问今是何世,乃不知有汉,无论魏晋。
此人一一为具言所闻,皆叹惋。
余人各复延至其家,皆出酒食。
停数日,辞去。
此中人语云:“不足为外人道也。
”8.本文作者是时期著名诗人。
(2分)9.用现代汉语翻译下面的句子(3分)此中人语云:“不足为外人道也。
杨浦区2019学年度第一学期高三年级期末质量抽查试卷
杨浦区2019学年度第一学期高三年级期末质量抽查试卷化学试卷参考答案与解析一、选择题1.C解析:A.钢中的含碳垦低于生铁,含碳量越大,硬度越高,但是生铁的韧性较钢要差,钢材的抗震性更好,故A正确B.该钢材改变了金属的组成和结构,比生铁的抗耐蚀性要好,故B正确C.根据生铁的含碳量为:2%4.3%,钢的含碳量为:0.03%2%,可知含碳量:生铁>钢,故C错误D.钢材和生铁都是合金都有金属,都导电导热,故D正确2.D解析:A.石油主要成分是烷烃、环烷烃、芳香烃,煤是无机物和有机物的混合物,故A正确。
B. 石油主要成分是烷烃、环烷烃、芳香烃,煤是无机物和有机物的混合物,故B正确C.石油裂化可以得到轻质汽油,煤干馏得到:焦炉气、煤焦油、粗氨水、焦炭,故C正确D.石油分馏是利用混合物中各组分沸点不同,将成分分开,是物理变化。
煤干馏是隔绝空气强热,使其分解的过程,属于化学变化,故D错误。
3.C解析:A.铟(In)与铝同主族,最外层电子数和A相等,有3个,故A错误B.铟(In)与碘同周期,同周期元素从左往右,原子半径逐渐减小,所以In的原子半径大于,故B错误C.元素周期表中同一主族元素从上到下,金属性越强,还原性越强,其氧化物的碱性越强,所以In(OH)3的碱性强于Al(OH)3,故C正确。
D.铟(In)是主族元素,不是过渡元素,故D错误4.A解析:A. C3N4晶体具有比全刚石更大的硬度,C3N4晶体是原子晶体,其中只有共价键,故A正确B. C3N4晶体是原子晶体,其中只有共价键,没有离子,故B错误C. C3N4晶体具有比金刚石更大的硬度,且原子间均以单键结合,为原子晶休,每个C原子周围有4个N原子,每个N原子周围有3个C原子,形成空问网状结构,C-N键为共价键,没有N≡N,故C错误D. C3N4晶体中每个C原子周围有4个N原子,形成正四面体空间网状结构,没有极性,故D错误5.B解析:A.铝热反应常用于焊接铁轨,该反应中Al作还原剂,Al的还原性比锰、钒等金属的强,故A相关B.铝能形成多种合金和工业上可用铝热反应冶炼锰、钒等难熔金属无关,和铝本身的性质有关,故B不相关C.铝相对锰、钒较廉价,所以用铝来制备锰和钒,故C相关D.铝热剂为铝和金属氧化物的混台物,反应在高温条件下发生氧化还原反应置换出金属单质,为放热反应,放出大量热,故D相关。
上海市杨浦区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解析版)
杨浦区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12题,1-6每题4分,7-12每题5分,共54分) 1. 设全集{1,2,3,4,5}U =,若集合{3,4,5}A =,则U A =ð 2. 已知扇形的半径为6,圆心角为3π,则扇形的面积为 3. 已知双曲线221x y -=,则其两条渐近线的夹角为 4. 若()n a b +展开式的二项式系数之和为8,则n = 5. 若实数x 、y 满足221x y +=,则xy 的取值范围是6. 若圆锥的母线长5()l cm =,高4()h cm =,则这个圆锥的体积等于 3()cm7. 在无穷等比数列{}n a 中,121lim()2n n a a a →∞++⋅⋅⋅+=,则1a 的取值范围是 8. 若函数1()ln1xf x x+=-的定义域为集合A ,集合(,1)B a a =+,且B A ⊆,则实数a 的 取值范围为9. 在行列式274434651xx--中,第3行第2列的元素的代数余子式记作()f x ,则 1()y f x =+的零点是10. 已知复数1cos 2()i z x f x =+,2(3sin cos )i z x x =++(x ∈R ,i 为虚数单位),在复平面上,设复数1z 、2z 对应的点分别为1Z 、2Z ,若1290Z OZ ︒∠=,其中O 是坐标原点,则函数()f x 的最小正周期为 11. 当0x a <<时,不等式22112()x a x +≥-恒成立,则实数a 的最大值为 12. 设d 为等差数列{}n a 的公差,数列{}n b 的前n 项和n T ,满足1(1)2n n n n T b +=-(n ∈*N ),且52d a b ==,若实数23{|}k k k m P x a x a -+∈=<<(k ∈*N ,3k ≥),则称m 具有性质k P ,若n H 是数列{}n T 的前n 项和,对任意的n ∈*N ,21n H -都具有性质k P ,则所有满足条件的k 的值为二. 选择题(本大题共4题,每题5分,共20分)13. 下列函数中既是奇函数,又在区间[1,1]-上单调递减的是( )A. ()arcsin f x x =B. ()lg ||f x x =C. ()f x x =-D. ()cos f x x = 14. 某象棋俱乐部有队员5人,其中女队员2人,现随机选派2人参加一个象棋比赛,则选出的2人中恰有1人是女队员的概率为( ) A.310 B. 35 C. 25 D. 2315. 已知sin ()log f x x θ=,(0,)2πθ∈,设sin cos ()2a f θθ+=,(sin cos )b f θθ=⋅, sin 2()sin cos c f θθθ=+,则a 、b 、c 的大小关系是( )A. a c b ≤≤B. b c a ≤≤C. c b a ≤≤D. a b c ≤≤ 16. 已知函数2()2x f x m x nx =⋅++,记集合{|()0,}A x f x x ==∈R ,集合{|[()]0,}B x f f x x ==∈R ,若A B =,且都不是空集,则m n +的取值范围是( ) A. [0,4) B. [1,4)- C. [3,5]- D. [0,7)三. 解答题(本大题共5题,共14+14+14+16+18=76分)17. 如图,PA ⊥平面ABCD ,四边形ABCD 为矩形,1PA AB ==,2AD =,点F 是PB 的中心,点E 在边BC 上移动.(1)求三棱锥E PAD -的体积;(2)证明:无论点E 在边BC 的何处,都有AF ⊥PE .18. 在△ABC 中,角A 、B 、C 所对的边分别为a 、b 、c ,且5cos 13B =. (1)若4sin 5A =,求cos C ; (2)已知4b =,证明:5AB BC ⋅≥-.19. 上海某工厂以x 千克/小时的速度匀速生产某种产品,每一小时可获得的利润是3(51)x x+-元,其中110x ≤≤.(1)要使生产该产品2小时获得的利润不低于30元,求x 的取值范围;(2)要使生产900千克该产品获得的利润最大,问:该厂应选取何种生产速度?并求最大利润.20. 如图,已知点P 是y 轴左侧(不含y 轴)一点,抛物线2:4C y x =上存在不同的两点A 、B ,满足PA 、PB 的中点均在抛物线C 上.(1)求抛物线C 的焦点到准线的距离;(2)设AB 中点为M ,且(,)P P P x y ,(,)M M M x y ,证明:P M y y =;(3)若P 是曲线2214y x +=(0x <)上的动点,求△PAB 面积的最小值.21. 记无穷数列{}n a 的前n 项中最大值为n M ,最小值为n m ,令2n nn M m b +=,n ∈*N . (1)若2cos2nn n a π=+,请写出3b 的值; (2)求证:“数列{}n a 是等差数列”是“数列{}n b 是等差数列”的充要条件;(3)若对任意n ,有||2018n a <,且||1n b =,请问:是否存在K ∈*N ,使得对于任意不小于K 的正整数n ,有1n n b b +=成立?请说明理由.杨浦区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一. 填空题1. {1,2}2. 6π3.2π4. 35. 11[,]22- 6. 12π 7. 11(0,)(,1)228. [1,0]- 9. 1x =- 10. π 11. 2 12. 3或4 二. 选择题13. C 14. B 15. D 16. A 三. 解答题19.答案:(1)[3,10];(2)6x =,最大值为4575. 解析:(1)2(5x+1-3x )≥30,即5x+1-3x≥15 整理可得:251430x x --≥,解得:x≥3或x≤-15(舍去) 所以: 3≤x≤10(2) 要使生产900千克该产品获得的利润最大时为y , 生产900千克该产品需要时间:t=900x, y =900x ×3(51)x x +-=4500+900x -22700x =-2700(2113x x-)+4500=-2700211()6x-+45751≤x≤10,所以当x=6,y 取最大值为4575元20.(1)焦点坐标为(1,0),准线方程为x =-1,所以,焦点到准线的距离为2(2)设00(,)P x y ,211(,)4y A y ,222(,)4y B y ,则PA 中点为20011(,)282x y y y ++,由AP 中点在抛物线上,可得220101()4()228y y x y +=+,化简得2210100280y y y x y -+-=,显然21y y ≠, 且对2y 也有2220200280y y y x y -+-=,所以12,y y 是二次方程22000280y y y x y -+-=的两不等实根,所以1202y y y +=,1202M P y y y y y +===。
杨浦区2019学年度第一学期期末质量调研参考答案及评分标准(125)
(共20分)
26.(1)物质质量;(2)物质体积;(3)排开液体体积;(4)F1-F2
27.(5)U形管压强计;(6)液体种类;(7)深度相同,液体密度越大,液体内部压强越大
28.(8)并联电路中,各支路两端电压相等。
(9)不同意,理由略(本题考查科学态度)。
29.计算过程:
(10)
(11)假设电压表并联在待测电阻两端
18.(20)对同一导体,通过它的电流随它两端电压的增大而增大。
(21)不合理,书上的结论是在保持某导体的温度不变时,通过导体的电流与两端的电压成正比,而这个实验,用的实验器材是小灯,而小灯的温度在升高。
3分
3分
3分
3分
3分
3分
2分
2分
2分
2分
三、作图题
(共8分)
19.大小1分、方向1分、作用点1分3分
第二次:Rx=Ux/I=(6伏-1.5伏)/0.46安≈9.8欧
第三次:Rx=Ux/I=6伏/0.6安=10.0欧
平均值Rx=10.1欧
30.(13)水不溢出,∆F容等于G。
(14)水不溢出,∆F水与V成正比。
(15)不正确,由5、6可知,当物块浸没在装有水的容器中,水溢出时,∆F水不变,容器对底部的压力不变,容器底面积S不变,根据p=F/S,水对容器底部的压强不变。/液体深度不变,根据p=ρgh,水对容器底部的压强不变。
13.(7)3;(8)20;(9)20。
14.(10)9.8;(11)1;(12)1。
15.(13)大于;(14)等于;(15)小于。
16.(16)变小;(17)变大;(18)不变。
17.(19)若电压表V1示数为0,电压表V2示数为U时,则R1短路。
杨浦区2019学年度第一学期期末质量调研 初三物理答题纸(125)
请在黑色矩形边框内答题,超出黑色矩形边框的答题一律无效
21.
请在黑色矩形边框内答题,超出黑色矩形边框的答题一律无效
请在黑色矩形边框内答题,超出黑色矩形边框的答题一律无效 四.计算题(共 26 分)
22.①
②
23.①
②
24. ①
②
③
请在黑色矩形边框内答题,超出黑色矩形边框的答题一律无效
19.
20.
二.填空题(每空 1 分,共 26 分 )
11.(1)_____________ (2)_____________ (3)_____________
12.(4)_____________ (5)_____________ (6)_____________
13.(7)_____________ (8)_____________ (9)_____________
条形码粘贴区域
填涂实例
正确填涂 错误填涂
缺考标记
一.选择题(每题 2 分,共 20 分)
1 2 3 4 5 6 7 8 9 10
27.(5)____________________(6) ______________________ (7)_____________________________________________
28.(8)_____________________________________________ (9)_____________________________________________ _____________________________________________
2019届上海市杨浦区高三上学期期末等级考(一模)化学试卷(解析版)
绝密★启用前上海市杨浦区2019届高三上学期期末等级考质量调研(一模)化学试题(解析版)相对原子质量:H—1 C—12 N—14 O—16 S—32 Ca—40一、选择题(本题共40分,每小题2分)1.下列分子中的所有原子均在同一平面内的是()A. 甲烷B. 乙烯C. 乙酸D. 甲苯【答案】B【分析】在常见的有机化合物中甲烷是正四面体结构,乙烯和苯是平面型结构,乙炔是直线型结构,其它有机物可在此基础上进行判断。
【详解】A项、甲烷是正四面体结构,所有原子不可能在同一个平面上,故A错误;B项、乙烯是平面结构,所有原子在同一个平面上,故B正确;C项、乙酸中含有甲基,具有甲烷的结构特点,所有原子不可能在同一个平面上,故C错误;D.甲苯中含有甲基,具有甲烷的结构特点,所有原子不可能在同一个平面上,故D错误。
故选B。
【点睛】本题主要考查有机化合物的结构特点,做题时注意从甲烷、乙烯、苯和乙炔的结构特点判断有机分子的空间结构。
2.原子晶体具有的性质是()A. 熔点高B. 易导热C. 能导电D. 有延展性【答案】A【详解】原子晶体的构成微粒是原子,原子间存在共价键,原子晶体是空间网状结构导致其具有键能大、熔点高、硬度大的特性,不能导电、导热,没有有延展性,故选A。
【点睛】离子间通过离子键形成的晶体是离子晶体,分子间通过分子间作用力形成的晶体是分子晶体,原子间通过共价键形成的空间网状结构的晶体是原子晶体,由金属阳离子和自由电子构成的晶体是金属晶体。
由于范德华力和氢键,作用力小,所以分子晶体的熔沸点比较低,硬度小。
原子晶体的熔沸点高,不导电,一般不溶于其它溶剂,离子晶体的熔沸点也较高,水溶液或在熔融状态下可以导电,金属晶体的一般具有良好的导电和导热性,具有延展性。
3.有关合金的说法正确的是()A. 生铁比纯铁熔点高B. 钢比纯铁硬C. 合金不具有导热性D. 合金都不含非金属元素【答案】B【分析】合金是指由一种金属与其它金属或非金属熔合而成的具有金属特性的物质,合金相对于组成它的金属来说,一般具有熔点较低、耐腐蚀性强、硬度大、机械强度大等方面的特点。
上海市杨浦区2019届第一学期九年级化学期末质量调研试卷(含答案)
杨浦区2018 学年度第一学期期末质量调研初三化学试卷2019.1可能用到的相对原子质量:H-1 C-12 O-16 Cl-35.5 K-39一、单项选择题(本题共24 分)1.属于化学变化的是A.酒精挥发B. 冰雪融化C. 干冰升华D. 缓慢氧化2.空气中体积分数最大的气体是A.氮气B. 氧气C. 稀有气体D. 二氧化碳3.高铁酸钠(Na2FeO4)是一种“绿色环保高效”消毒剂,高铁酸钠(Na2FeO4)中铁元素化合价为A. 0B. +2C. +3D. +64.关于家中一些食品及生活用品的pH(如右图),说法正确的是A.牙膏是中性物质B.酱油显碱性C.食醋的酸性比葡萄汁强D.胃酸过多的人宜多吃葡萄5.对化学用语中“2”的意义,理解正确的是+2A.Ca 中的“2”表示钙原子的化合价为+2 价B.H2中的“2”表示两个氢原子C.2Mg 中的“2”表示两个镁元素D.2CO 中的“2”表示2 个一氧化碳分子6.属于同素异形体的一组物质是B. 石墨和金刚石C. 氧气和液氧D.水和双氧水A. 水和冰7. 属于溶液的是A. 酸奶B. 玉米汁C. 冰水D.矿泉水8.由原子直接构成的物质是A.铜B. 氧气C. 一氧化碳D. 水9.物质的化学式与名称对应正确的是A.氯化氨:NH4ClB. 氢氧化铁:Fe(OH)2C. 硝酸钙:Ca(NO3)2D. 碳酸钠:NaCO310.有关实验现象描述正确的是A.红磷在空气中燃烧,产生大量白雾B. 硫在空气中燃烧,产生蓝紫色火焰C. 木炭在空气中燃烧,生成黑色固体D. 氢气在氧气中燃烧,产生淡蓝色火焰11.对事实解释错误的是A.花香四溢——分子在不断运动B.H2O 和H2O2的化学性质不同——分子构成不同C.气体可压缩储于钢瓶中——分子数目变少D.水蒸发属于物理变化——分子种类没有改变12.实验室欲进行粗盐提纯,然后用提纯的精盐配制50g 溶质质量分数为15%的氯化钠溶液,说法正确的是A.实验的步骤为:溶解、过滤、蒸发、转移、计算、称取、量取、溶解B.蒸发实验结束后用手拿着蒸发皿小心的放在石棉网上,不可直接放在实验台上C.把配制好的氯化钠溶液倒入刚用蒸馏水润洗过的试剂瓶中,结果会偏大D.量取水时,用规格为50mL 的量筒量取42mL 蒸馏水13.描述错误的是A.CO 有毒且无色无味,使用燃气时要注意室内通风B.熟石灰能中和土壤酸性,在农业生产中有广泛应用C.N2充入食品包装袋中可起防腐作用D.CH4在空气中燃烧,属于化合反应14.驱蚊产品的有效成分为DEET(避蚊胺),其化学式为C12H17NO,该物质的说法正确的是A.避蚊胺由31 个原子构成B.避蚊胺的物质类别是氧化物C.避蚊胺中碳元素的质量分数最大D.避蚊胺中碳、氢元素质量比为12:1715.关于化合反应的说法一定正确的是A.元素化合价都不变B. 生成物是一种物质C. 反应都需要一定条件D. 反应物只有两种物质16.推理是化学学习中常用的思维方法,以下推理正确的是A.混合物中至少含有两种物质,则混合物中至少含有两种元素B.均一稳定的混合物是溶液,碘酒均一稳定,则碘酒属于溶液C.化学变化伴随有能量变化,则有能量变化的变化一定是化学变化D.中和反应能生成盐和水,则生成盐和水的反应一定是中和反应17.归纳法是学习化学的重要方法之一,以下图示正确的是18.向pH 为a 的某无色溶液中加入一定量的水后,溶液的pHA.一定增大B. 一定减小C. 一定不变D. 一定在a~7 之间19.实验室测定蜡烛在盛有一定体积空气的密闭容器内燃烧至熄灭过程中,O2和CO 的含量随时间变化曲线如图所示,通过分析该图可推理出的结论是A. 曲线①表示CO 含量的变化A.在一定条件下,蜡烛燃烧生成COB.蜡烛燃烧时,产生CO 的量与O2的含量无关C.蜡烛熄灭时,容器内氧气耗尽20.鉴别物质的方法或试剂正确的是21.实验设计不合理的是22.碳还原氧化铜的实验如图所示,实验结束时停止加热,冷却至室温。
上海市杨浦区2019届高三上学期期末质量调研(一模)英语试题及答案(word版)
杨浦区2018~2019学年度第一学期高三年级期终调研测试英语试卷(完卷时间:120分钟满分:140分)2018.12考生注意:1.考试时间120分钟,试卷满分140分。
2.本次考试设试卷和答题纸两部分。
所有答题必须涂(选择题)或写(非选择题)在答题纸上,做在试卷上一律不得分。
3.答题前,务必在答题纸上填写准考证号和姓名,并将核对后的条形码贴在指定位置上,在答题纸反面清楚地填写姓名。
I. Listening Comprehension Section A1. A. Job applicants. B. University students. C. News reporters. D. Public speakers.2. A.$36. B. $60. C. $24. D.$303. A. Nervous. B. Excited. C. Surprised. D. Calm.4. A. They can hardly find time to do exercise.B. Both of them are fond of doing exercise.C. Doing exercise is the last thing they'd like to do.D. The woman disagrees to do exercise with the man.5. A. Student and teacher. B Guest and receptionist.C. Customer and shop assistant.D. Daughter and father.6. A. The Student Union. B. The Tutoring Service Center.C. Her professor's office.D. Her tutor's home.7. A. The coverage of newspapers. B. The nature of humans.C. The increase of crime rate.D. The impact of mass media.8. A. Doctor Green is very busy on Mondays.B. Doctor Green forgot to put the man on the schedule.C. An unexpected patient visited Doctor Green last Monday.D. Patients can usually see Doctor Green on schedule.9. A. She is disappointed with his decision.B. She is crazy about going camping in the tropical jungle.C. She tries to persuade the man not to go with Jerry.D. She suggests the man reconsider his plan.10. A. Because he favors goods in physical stores.B. Because he enjoys the offline shopping experience.C. Because he doesn't have much money.D. Because he doesn't like the shopping festival.Section B Questions 11 through 13 are based on the following passage.11. A. A number of giant rats are hidden in the fields or forests.B. Violent robbers may come out and hurt innocent civilians.C. People may step onto a landmine(地雷) and get injured.D. Other roads have a litter problem, which spoils good mood.12. A. It is a rare species of rat. B. It has a good sense of smell.C. It sacrifices its life to detect dangers.D. It is terrified of explosive device.13.A. 13 minutes B. 30 minutes C. 40 minutes D. 4 daysQuestions 14 through 16 are based on the following passage.14.A. It bans the sales of salty and unhealthy food.B. Its residents lose altogether 100,000kg by 2020.C. Everyone weighs himself on giant scales in public.D. Local doctors make personalized diets for everyone15. A. Local people share healthy diet with each other.B. Thousands of residents kick football to keep slim.C. Local restaurants use olive oil to replace butter.D. Government officials persevere in physical exercise.16. A. Students are encouraged to walk or ride to schoolB. Students are allowed to ride bicycles in school libraries.C. Parents are offered devices to monitor children's walking time.D. Fruits are provided for those who are addicted to online games.Questions 17 through 20 are based on the following passage.17. A. Neither of them can find a suitable game.B. They are both enthusiastic about games.C. Good games cost a large amount of money.D. They often go Dutch when buying gifts.18. A. It includes fantasy role-playing. B. It doesn't have an actual ending.C. It is an expensive online game.D. It is something like a racing game.19. A. Players have opportunities to make new friends.B. Players can have face-to-face communication.C. Players may be rewarded with delicious food.D. Players can start the game at anytime they want.20. A. Add variety to the recommended game.B. Look around to find a cheaper online game.C. Persuade the woman to change her mind.D. Try to find an extraordinary online game.II. Grammar and Vocabulary Section AA newly discovered tea plant is caffeine-freeThe world loves tea and some 3m tons of tea are consumed every year. Tea can be good for health, as it contains compounds that help to lower cholesterol(胆固醇)and reduce the risk of heart disease. But there is a downside. Tea contains caffeine which, (21) __________ it improves mental alertness, can also cause anxiety, insomnia and other problems.(22) __________ would be agreeable is that a tea plant that provides all the taste and goodness but with little or (23) __________ of the caffeine has been found. Liang Chen and Ji-Qiang Jin of the Tea Research Institute of the Chinese Academy of Agricultural Sciences have discovered just such a plant (24) __________ (grow) wild in a remote area in Fujian province, southern China. (25) __________ they report in the Journal of Agricultural and Food Chemistry, not only is the tea plant naturally caffeine-free but it also contains a number of unique medicinal compounds that, the locals believe, offer considerable health benefits.(26) __________ (know) locally as Hongyacha, the newly discovered plant grows onlybetween 700 and 1,000 metres (27) __________ sea level around a handful of Chinese villages.Now the researchers (28) __________ (explore) methods to protect Hongyacha in its natural habitat while further studies are carried out. It can take time – and sometimes it does not work –for new plant varieties (29) __________ (breed) for commercial use. A pair of naturally caffeine-free coffee plants were discovered in 2003, but little progress (30) __________ (report) Tea enthusiasts will be watching Hongyacha with interest. And others will wonder what else is out there.Section BA. willingnessB. loyalC. priorityD. figureE. acknowledgingF. interactionG. academic H. drain I. stress J. tense K. convincingDealing with Difficult RelationshipsEveryone has at least one awkward or ___31___ relationship. It may be with somebody who will ___32___ your energy whenever you are with them. Or worse, it could be someone who always cuts you down. This person may be a family member or even a friend. No matter who it is, it’s necessary that you learn to set boundaries for yoursel f. Otherwise this kind of relationship can chip away at your self-esteem.Setting boundaries for difficult relationships starts by ___33___ how you are affected by the relationship. Do they bring you closer to your goals or pull you farther away? For ex ample, it’s time to study for tomorrow’s test. But your friend wants to take you to a party. Here, setting boundaries will help protect your ___34___ goals.Next, decide how much time you should spend with these people. It’s easy to overcommit yourself. But it’s difficult to help others if you forget to protect your own ___35___.How do you know if a relationship is unhealthy, and it’s time to set boundaries? Here are a few practical questions to ask yourself.1.How does this relationship affect me?Every ___36___ can affect you positively or negatively. For example, someone who pressures you to something you’re not comfortable doing will ____37___ you out. But a friend who considers how you feel will respect your ___38___ to try something new.2.Why am I in this relationship in the first place?People may try to keep you in an unhealthy relationship. By ___39___ you it’s your obligation or duty, you forget about your own needs. Sadly, by remaining ___40___ to these people, you forget who you are. You allow them to take advantage of you or even belittle you.Settling boundaries requires taking a long, honest look at yourself. By saying “no” to harmful patterns in relationships, you say “yes” to a healthier you.III. Reading ComprehensionSection AAccording to German novelist Heinrich Mann (1871-1950), a house without books is like a room without windows. Mann ___41___ pointed out the value of books, but some researchers have found evidence that people with books in their homes really do gain a window on the world.A new study in the journal Social Science Research, publishing in October, suggests thatpeople who grow up with more books are more likely to have educational ___42___, and to achieve more in life, than people who grow up without them. In the study, over 160,000 adults from 31 countries and regions were asked about the number of books there were in their homes when they were 16 years old. Then they were_ 43_ in literacy, numeracy (计算能力) and information communication technology.The research shows that the number of books for each household 44_ greatly from country to country. 45 _, the number of books is 27 in Turkey, 143 in the UK and 218 in Estonia. But "the total 46 _ of home library size on literacy are large everywhere” , according to researcher Joann Sikorn of Australian National University in a paper based on the study.The researcher found that people who had lower levels of secondary eduation but had a large number of books at home got a(n)_47_ score as university graduates who grew up with only a few books.The Guardian newspaper commented that “bookish adolescence makes for a good deal of educational advantage.""Reading books in a young age can _ 48 shortcomings not only in adult literacy but also numeracy; its impacts are __49 to additional years of education." Sikora told Science Alert. Apart from the educational benefits, growing up with more books also plays an important role in adult success."Early _50_ to books in the parental home matters because books are an essential part of routines and practices that 5l_ lifelong cognitive (认知的)abilities", Sikora told Science Alert. These abilities are_ 52_ to future development.Without doubt, the fact that we are moving toward a digital era could_ 53_ the importance of printed books. For now, 54_, "they still seem to_ 55_ quite a large positive benefit, which shows no sign of decreasing", researchers wrote in the paper.41. A. simply B. definitely C. generally D. randomly42 A. backgrounds B. advantages C. requirements D. development43. A. estimated B. examined C. tested D. investigated44 A. changes B. alters C. shifts D. varies45 A By comparison B. As a result C. For instance D. In total46. A. effects B. expenses C. inputs D. contributions47. A. higher B. lower C. average D. similar48. A. make up for B break up with C. live up to D. catch up with49 A. senior B. essential C. equal D. familiar50. A. addition B. engagement C. devotion D. exposure51. A. prove B. demonstrate C. enhance D. acquire52. A. relevant B. crucial C. opposite D. compulsory53. A. weaken B. highlight C. overestimate D. reflect54. A. therefore B. however C otherwise D. likewise55. A. enjoy B. obtain C. maintain D. reduceSection B(A)"Don't tell anyone". We hear these words when someone tells a secret to us. But it can be hard to keep a secret. We're often tempted to “spill the beans”, even if we regret it later According to Asim Shah, professor in the Menninger Department of Psychiatry and Bchavioral Sciences at Baylor College of Medicine, US, keeping a secret may well “become a burden". This is because people often have an "obsessive(无法摆脱的) and anxious urge to share it with someone".An earlier study, led by Anita E. Kelly, a scientist at the University of Notre Dame, US, suggested that keeping a secret could cause stress. People entrusted with secrets can suffer from depression, anxiety, and body aches, reported the Daily Mail.But with secrets so often getting out, why do people share them at all? Shah explained that people often feel that it will help them keep a person as a friend. Another reason people share secrets is guilt over keeping it from someone close to them. A sense of distrust can develop when people who are close do not share it with each other. "Keeping or sharing secrets often puts people in a position of either gaining or losing the trust of someone." according to Shah.He added that talkative people could let secrets slip out. But this doesn't mean that it is a good idea only to share secrets with quiet people. A quiet person may be someone who keeps everything inside. To tell such a person a secret may cause them stress, and make them talk about the secret.Shah said that to judge whether to tell someone a secret, you'd better put yourself in their position. Think about how you would feel to be told that you mustn't give the information away. Shah also recommended that if you accidentally give up someone's secret you should come clean about it. Let the person know that their secret isn't so secret anymore.56. The underlined phrase "spill the bean" is closest in meaning to ________.A. let out a secretB. tell the truthC. eat our wordsD. take gossip57. A person who is entrusted with a secret ________.A. is oft often obsessed with a certain threatB. often would rather not have been told about itC. usually has a strong desire to keep it until deathD. may suffer from physical or psychological problems58. What can we learn from the passage?A. Quiet people are more likely to keep the secrets to themselves.B. Sharing secrets helps establish friendship or get over the sense of guilt.C. It's better to inform others of the chances of your leaking secrets beforehand.D. Putting yourself in others' shoes helps realize the difficulty of keeping secrets.59. What’s the best title for the passage?A. Walls have ears.B. Still tongues make wise heads.C. A word spoken is past recalling.D. Every wall has a crack.(B)Does the thought of cooking an entire Christmas dinner for friends and family make you shudder? Our cookery writer Sophie Godwin has created the ultimate simplified menu for a stress-free day. With a range of time-saving techniques and showstopping flavour twists,this is the only festive menu you'll ever need. Embrace the art of the shortcut!Your timeplan to eat at 2pmView and print our at-a-glance infographic time plan.·11am Take your turkey out of the fridge.·11.30am Heat the oven. Prepare the rosemary butter and rub underneath the turkeyskin.·12pm Put the turkey in the oven to roast.·12.15pm Boil the potatoes and root vegetables. Make the harissa & orangemarmalade glaze. Chop the ingredients for the stuffing sprouts.·1pm Baste the turkey, pour in the white wine and nestle cabbage wedges around thebird. Return to the oven.· 1.10pm Prepare the separate ingredients for the mackerel starter.· 1.25pm Smash the roasties and put them in the oven.· 1.30pm Check the turkey—take out to rest if the internal temperature has reached 65C. Return the cabbage to the oven to finish cooking.· 1.35pm Toss the roasted roots in the harissa glaze, then put in the oven.· 1.40 pm Make the gravy, cook the sprouts and keep warm.·2 pm Sit down to the starter, with everything for you lunch ready to go.·The dessert takes just 10 minutes to assemble ,so you can do it once you’ve enjoyed the ma in course.Buy your ingredientsWe’ve pre-loaded your shopping list so that you can quickly buy all your ingredients for this menu in one go. Just click below to be taken to your shopping list, where you can buy all your ingredients from your preferred supermarket, and remove any ingredients as needed, and even print the list, to use direct when shopping.(Serves 6)·Add to shopping ListThe above shopping list is powered by Whisk. Please check your list thoroughly before purchasing. If the same items appear across different recipes they will not automatically combine in your list and you’ll need to do this manually. Please als o check the products that have been selected via the Whisk program, as you may prefer a different brand from that listed.60.Which section CAN’T we find on the website?A. Classic cocktailsB. Vegetarian ChristmasC. Roast calculatorD. Wealth management61.How long does it take to toast the turkey?A.1 hourB.2 hoursC.1.5 hoursD.2.5 hours62.Which of the following is True?A. The entire Christmas dinner is composed of a roasted turkey and dessert.B. The automatically-generated shopping list is just for user’s reference.C. Most of the ingredients on the shopping list come from the same brand.D. You can buy all your ingredients online through Whisky by one click.(C)You’re walking down a quiet street and suddenly you hear some footsteps .Undoubtedly ,it means that there’s someone around. But have you ever wonder why it occurs to us that it’s someone else’s footsteps , not ours?According to a new study published in the journal Nature in September, this phenomenon arises from a function in our brain to ignore the noise we make ourselves.In order to explore how our brain does this, a group of scientists carried out an experiment with mice at Duke University. The research entered on an intuition(直觉)---that we are usually unaware of the sound of our own footsteps ---as a vehicle for understanding larger neural(神经系统的) phenomena; how this behavior reveals the ability to monitor, recognize, and remember the sound of one’s own movements in r elation to those of their larger environments.In the experiment, research controlled the sounds of a group of mice could hear, reported Science Daily. During the first several days, the mice would hear the same sound each time they took a step. This was just like “running on a tiny piano with each key playing exactly the same note”, senior study author Richard Mooney, a professor of neurobiology at Duke University, told Live Science.Scientists found that their auditory cortex (听觉皮层) – the area of the brain that processes sound –became active at first but decreased its response to the sound after two or three minutes when the mice became familiar with it.“ It’s almost like they were wearing special headphones that could filter(过滤) out the sound of their own movements.” David Schneider, an assistant professor at the Center for Neutral Science at New York University, told HuffPost.But once the sound changed, their auditory cortex became active again. This suggests that the “sensory filter” in a mouse’s brain could help it detect new sounds or abnormal noise in the environment easily after tuning out familiar sounds.“For mice, this is really important,” said Schneider. “They are prey animals, so they really need to be able to lis ten for a cat creeping up on them, even when they’re walking and making noise.Being able to ignore the sounds of one's own movements is likely important for humans as well. But the ability to predict the sounds of our own actions is also important for more complex human behaviors such as speaking or playing an instrument."When we learn to speak or to play music, we predict what sounds we are going to hear –such as when we prepare to strike keys on a piano – and we compare this to what we actually hear, "explains Schneider. “We use mismatches between expectation and experience to change how we play –and we get better over time because our brain is trying to minimize these errors.”63. What can be discovered about mice in the experiment?A. Their brain responds inactively to the familiar soundsB. They are able to detect sounds other animals don’t notice.C. They cannot identify different sounds except their own footsteps.D. Different areas of their brain are responsible for different sounds.64. What’s the function of the sensory filter?A. Getting used to abnormal or unfamiliar sounds.B. Ignoring the sounds made by our companions.C. Identifying the sounds from a larger environmentD. Being sensitive to the sounds of our own movement.65. Why can a good symphony conductor immediately recognize it when a wrong note is played?A. He has the ability to match the wrong note with the instrument player.B. He has an intuition that he should ignore the sound of his own movement.C. He has a low expectation and knows where players are likely to make errors.D. He has a good prediction of how each note should be played in the orchestra.66. What can be inferred from the passage?A. Noise-filtering ability ensures us a quiet and undisturbed environment.B. The ability to ignore familiar noises helps to detect potential dangers.C. The activeness of auditory cortex determines our activity performance.D. Sound-predicting ability seems not so important for humans as for animals.Section CA. Pronouns offer an insight into whether people see themselves as individuals or as part of a whole.B. If you are speaking in a person context, you're speaking about something that's of relevance to you.C. Their research also found that "we-talk" is helpful for resolving conflicts.D. Self-centered people are found to be indifferent to many things in society and other people because all their concentration is only on themselves and their needs.E. This analysis of "we-talk" suggested that the frequent use of "we" and "us" is linked to happier and healthier relationships.F. They found that too much "I-talk" was an accurate linguistic marker for the likelihood that someone is feeling stressed or experiencing negative emotions.Building a lasting social relationshipWe all know that friends are special people who we share our lives with, and who share their lives with us in return. But seeking friends and keeping the friendship going are never easy.According to research recently published in the Journal of Social and Personal Relationships, the key is to use "we-talk".Led by University of California psychologist Megan Robins and her colleagues, the researchers reviewed and analyzed 30 different studies involving over 5, 000 participants.___67____.The word "we" moves people from an individual position into a partnership, which makes us more interdependent."____68____.Word use is a window into what people are thinking and feeling without asking them." Robbins told Science Daily._____69______. The primary point is that interdependence may bring about supportive and relationship-centered behaviors and positive perceptions of the partner--especially important in times of stress and disagreement.Contrary to "we-talk", there is "I-talk", which refers to the frequent use of the first-person singular pronouns, such as "I", "me" and "mine", when writing or speaking. Earlier this year, researcher analyzed a set of data that came from 4,7000 people in Germany and the US. ______70_____. As you can see from the two studies, too much "I-talk" can make you feel depressed. But "we-talk" can encourage you to become more positive and create a chain effect of healthy interdependence with others.So next time you are talking to a friend, try using more "we-talk". You may find yourself feeling more positive--and the effect it will have on your friend will be positive as well.IV. Summary WritingWhen we wake up feeling sleepy and with dark circles under eyes, many of us often think:” I’m going to go to bed earlier tomorrow!” But however determined we are, chances are that we don’t stick to our promise. This behavior is called “bedtime procrastination(拖延症)”.According to a study carried out by a group of health psychologists at Utrecht University in the Netherlands in 2014, bedtime procrastination is a common problem. In their study, 53 percent of the 2,400 participants said they didn’t follow their sleep schedule, delaying it at least twice a week.It’s found that they delayed bedtime not because they liked to stay up late, but they couldn’t stop doing other unimportant things, which were keeping them up in the first place.“People who generally have trouble resisting temptations and sticking to their intentions are more likely to dela y going to bed.” Floor Kroese, a psychologist at Utrecht University, further explained to HuffPost.Yet, according to scientists, lack of self-control is not the only thing to blame. Our body clock also plays an important role when it comes to bed time. In order to check the influence of the body clock on sleep, psychologists at Ulm University in Germany studied the sleep patterns of 108 people in February. It was found that those who get up late are more likely to postpone their bedtime than those who wake early every morning.“The intention to go to bed earlier is not enough,” Jane Kuhnel, a psychologist at Ulm University, concluded in Popular Science. “Biological processes need to support this intention.”People always think that bedtime procrastination isn’t a big problem, but as Kroese told Popular Science, “the choices we make that affect out sleep could turn out to be pretty important for our health.”V. TranslationDirections:Translate the following sentences into English, using the words given in the brackets.72.无论幸福的定义如何变化,人们永远不会放弃追求幸福的权利。
上海市杨浦区2019届九年级上学期期末教学质量调研语文试题(PDF版)
杨浦区2018学年度第一学期期末初三质量调研语文试卷(满分ISO分考试时间100分炉)2019年1月[考牛注意:本卷共有27题。
请将所有答案写在答卷上,写在试卷上不计分]一、文言文阅读(共40分)(一)默写(15分)K,匹马戍梁州•((诉衷情》)—一,五十弦翻塞外声.(《破阵子•为陈同甫賦壮词以寄之)》)3.东边日出西边阑, ------------------------- 。
(《竹枝词》)4.___________ __________ ,并怡然自乐。
({桃花源记>)5.其余则熙熙而乐,_____________ !(《捕蛇者说》)(二)阅读下面的词,完成6—7题(4分)江城子•密州出猜老夫聊发少年狂,左伞黄,右擎苍《锦帽炤裘,千胂舂平PK为报傾城随太守,亲射虎,看孙酒狃胸胆尚开依,K微宙,又何妨!持节云中,何曰違易唐?会枕雕弓如滿月,西北 2, #天狼。
6. _________________________ 本首诃中,作者用了“__ ” “逍冯讲”“”三个典故9(2分〉7.F列对本首词中“狂”内涵的分析不恰当的一项足(>(2分)• • •A.“狂”在外在。
身着铧帽炤裘,手中左牵黄欠,右擎苍鹰,B.“狂”在行•为。
丰千骑“卷手冈”,“亲射虎” “射天稂”。
C.“狂”在姿态•尽兴“酒鉗”.“胸胆开张”,不惧髮€•D.“狂’•在志向。
期盼着朝廷“逡冯唐”,早日能报效国家。
(三)阅读下文完成8—10® (9分)岳阳楼记(节选)予观夫巴陵胜状.在利爽一湖。
衝远山,吞长江,浩法汤沩,橫无际涯。
朝晖夕阴,\象万千e此則岳阳楼之大現也,前人之述备矣•然則北通巫峡,南极潇湘,迀客骚人,多会于此,览物之情,得无号乎?8-_____________ 本文作者是____________________________ 时期旖名政治家、文学家。
(2分〉9-用现代汉语拥译下面的句子(3分)予呓夫C绫胜状.在洞庭一湖 ____ ___________________________________10•联系全文,“览物之情,得无异乎?,,-•句中“昇”的具体内容是 _________ 。
杨浦区2019学年度第一学期期末质量调研 (含答案)
杨浦区2019学年度第一学期期末质量调研初三物理练习卷(满分100分,时间90分钟) 2019.12考生注意:1.本试卷物理部分含五个大题。
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、本试卷上答题一律无效。
一、选择题(共20分)1. 一节新干电池电压为A .220伏B .24伏C .3伏D .1.5伏 2. 下列实例中,属于利用连通器原理工作的是A .抽水机B .密度计C .吸尘器D .液位计 3. 下列各物理量中,会影响导体电阻大小的是A .电压B .电流C .长度D .电荷量4. 在图1所示的实例中,为了增大压强的是5. 下列实验中主要的科学方法相同的是(1)探究液体内部压强与液体密度的关系 (2)测定物质的密度(3)探究串联电路中电阻的规律 (4)探究物质质量与体积的关系A .(1)与(3)B .(1)与(4)C .(2)与(4)D .(3)与(4) 6. 两个电阻R 1、R 2并联后的总电阻为10欧。
则下列判断正确的是 A .R 1一定小于10欧B .R 1可能为10欧C .R 2一定大于10欧D .R 2可能为10欧7. 有一个装满水的柱形容器,已知容器中水的重力为10牛,现在容器中放入一个重为4牛的物体,溢出水的重力为1牛。
则此时水对容器底的压力为A .9牛B .13牛C .10牛D .3牛8. 两个相同的柱形容器置于水平地面,容器中分别盛有相等体积的不同液体甲、乙。
取两块相同的橡皮泥,将一块橡皮泥撑开成碗状放入甲液体中,将另一块捏成球形状放入乙液体中,橡皮泥静止后如图2所示。
以下判断正确的是A .液体的密度ρ甲>ρ乙B .液体对容器底部的压强 p 甲<p 乙C .橡皮泥受到的浮力F 甲<F 乙D .容器对地面的压强p 地甲>p 地乙A .刀刃磨得很薄B .滑雪用的滑板C .铁轨下铺枕木D .书包背带加宽9. 在图3所示的电路中,电源电压保持不变,当滑动变阻器R 1的滑片P 由中点向右端移动时,变大的是 A.电压表V 的示数 B.电压表V 示数与电流表A 示数的比值 C.电流表A 的示数 D.电压表V 示数与电流表A 示数的乘积图3 图410.完全相同的圆柱体甲、乙置于水平地面上,将圆柱体分别置于它们的上方,甲、乙上表面受到的压强相等,如图4所示。
上海市杨浦区2019届九年级上学期期末(中考一模)质量监控英语试卷带讲解
杨浦区2018~2019学年度第一学期期末质量调研初三英语Part 1 Listening (第一部分听力)I. Listening comprehension (听力理解)A. Listen and choose the right picture (根据你听到的内容,选出相应的图片)A. B. C. D.E. F. D.H.1. ______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):7. A) By bus. B) By ferry. C)On foot. D) By underground.8. A)It's raining hard. B) It's pretty warm.C)It's quite cold. D) It's very windy.9. A) At 7:45. B) At 8:00. C) At 8:15. D) At 8:45.10. A)Ask Amy to come over. B) Pick Amy up for dinner.C)Save Amy as her contact. D) Prepare dinner for Amy.11. A)In a restaurant. B)In a clothes shop.C)In a sports center. D) In a bank.12. A) A rabbit. B) A dog. C)A snake. D) A fish.13. A) Excited. B) Unhappy. C)Bored. D) Surprised.14. A)The woman fell while jogging. B)The man broke the mobile phone.C)The mobile phone broken down. D) The mobile phone's screen is broken.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) 15. Sara was supposed to see afilm with her friends yesterday.16. Sara went to the police station because she had lost her purse.17. A man stopped Sara to ask the way while she was crossing the street.18. Sara's purse was stolen while she was shopping for a dress.19. The man with the keys stole Sara's purse.20. From the dialogue we can tell it's easy to get pick-pocketed in the area.D. Listen to the passage and complete the following sentences(听短文,完成下列内容。
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杨浦区2019学年度第一学期期末质量调研初三物理练习卷(满分100分,时间90分钟)2019.12考生注意:1.本试卷物理部分含五个大题。
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、本试卷上答题一律无效。
一、选择题(共20分)1. 一节新干电池电压为A.220伏B.24伏 C. 3伏D.1.5伏2. 下列实例中,属于利用连通器原理工作的是A.抽水机B.密度计C.吸尘器D.液位计3. 下列各物理量中,会影响导体电阻大小的是A.电压B.电流C.长度D.电荷量4. 在图1所示的实例中,为了增大压强的是5. 下列实验中主要的科学方法相同的是(1)探究液体内部压强与液体密度的关系(2)测定物质的密度(3)探究串联电路中电阻的规律(4)探究物质质量与体积的关系A.(1)与(3)B.(1)与(4)C.(2)与(4)D.(3)与(4)6. 两个电阻R1、R2并联后的总电阻为10欧。
则下列判断正确的是A.R1一定小于10欧B.R1可能为10欧C.R2一定大于10欧D.R2可能为10欧7. 有一个装满水的柱形容器,已知容器中水的重力为10牛,现在容器中放入一个重为4牛的物体,溢出水的重力为1牛。
则此时水对容器底的压力为A.9牛B.13牛C.10牛D.3牛8. 两个相同的柱形容器置于水平地面,容器中分别盛有相等体积的不同液体甲、乙。
取两块相同的橡皮泥,将一块橡皮泥撑开成碗状放入甲液体中,将另一块捏成球形状放入乙液体中,橡皮泥静止后如图2所示。
以下判断正确的是A.液体的密度ρ甲>ρ乙B.液体对容器底部的压强p液甲<p液乙C.橡皮泥受到的浮力F甲<F乙D.容器对地面的压强p地甲>p地乙9. 在图3所示的电路中,电源电压保持不变。
闭合电键S后,当滑动变阻器R1的滑片P由中点向右端移动时,变大的是A.电压表V的示数B.电压表V示数与电流表A示数的比值C.电流表A的示数D.电压表V示数与电流表A示数的乘积10. 完全相同的圆柱体甲、乙置于水平地面上,将圆柱体A、B分别置于它们的上方,甲、乙上表面受到的压强相等,如图4所示。
现将A、B位置互换,互换前后甲、乙上表面受到压强变化量大小分别为∆p A、∆p B,互换后甲、乙对地面的压强分别为p甲、p乙,则A.∆p A=∆p B,p甲>p乙B.∆p A>∆p B,p甲=p乙C.∆p A=∆p B,p甲<p乙D.∆p A<∆p B,p甲=p乙二、填空题(共26分)11. 上海市家庭照明电路的电压为(1)伏;电视机与节能灯之间的连接方式是(2)的(选填“并联”或“串联”),正常工作时,通过它们的电流是(3)的(选填“相同”或“不相同”)。
12.16世纪,(4)实验首先测定了大气压的值;奥托·格里克做了著名的(5)实验证明了大气压强的存在且很大。
通常海拔越高,大气压强越(6)。
13. 某导体两端的电压为12伏,通过该导体的电流为0.6安,则5秒内通过该导体横截面的电荷量为(7)库,该导体的电阻为(8)欧。
若通过该导体的电流为1.2安,其电阻为(9)欧。
14. 一正方体漂浮在水中,排开水的体积为1×10 3米3,它受到的浮力为(10)牛,排开水的质量为(11)千克。
若该正方体漂浮在酒精中(ρ酒精=0.8×103千克/米3),则排开酒精的质量为(12)千克。
15. 甲、乙两导体的材料和长度相同,已知甲的电阻较小,则甲的横截面积(13)乙的横截面积;若将它们并联在电路中,甲两端的电压(14)乙两端的电压;若将它们串联在电路中,则甲两端的电压(15)乙两端的电压。
(均选填“小于”、“等于”或“大于”)16. 在图5所示的电路中,电源电压保持不变。
当开关S从断开到闭合,电压表V的示数(16),电流表A的示数(17)。
闭合开关S,向左移动滑动变阻器滑片P的过程中电压表V示数与电流表A示数的比值(18)。
(均选填“变大”、“变小”或“不变”)17. 在图6所示电路中,电源电压为U 0且保持不变。
闭合开关S ,电路正常工作。
一段时间后,观察到一个电压表示数变小。
在电路中正确连接一个电流表,观察到电流表有示数。
若电路中仅有一处故障,且只发生在电阻R 1、R 2上,请根据以上信息写出两电压表示数及相对应的故障。
(19)18. 为了“探究同一导体的电流与电压关系”,小李同学连接好电路(如图7所示)进行实验并将数据记录在下表中。
完成实验后,小李在整理实验器材时发现小灯的玻璃罩变热了。
① 根据表中数据,可得初步结论是:(20)。
② 小王看了小李的实验数据后,再对照课本上的结论,如图8所示,认为小李的实验数据是错的。
你认为小王的判定是否合理,请简要说明理由 (21)。
三、作图题(共8分)19. 在图9中,重为4牛的物块静止在水平桌面中央,请根据给定的标度用力的图示法画出该物块对水平桌面的压力。
20. 在图10中的○里填上适当的电表符号,使之成为正确的电路图。
21. 在图11所示的电路中有两根导线尚未连接,以笔画线代替导线补上。
补上后要求:闭合开关S ,当滑动变阻器的滑片向左移动时,小灯亮度不变,电流表的示数变小。
图7图11图822. 如图12所示,重为19.6牛的物块A 静止在水中,此时弹簧测力计的示数为4.9牛。
① 求物块A 受到的浮力F 浮。
② 求物块A 的体积V 物。
23. 在图13(a )所示的电路中,电源电压为6伏,滑动变阻器R 2上标有“100Ω 1A ”字样。
开关S 断开时,电流表A 示数如图13(b )所示。
① 求电阻R 1的阻值。
② 不改变电表量程,闭合开关S ,在移动变阻器滑片P 的过程中,使电流表示数的变化量最大,求滑动变阻器R 2的最小阻值。
24. 在图14(a )所示的电路中,电源电压为18伏不变,电阻R 1的阻值为10欧,滑动变阻器R 2上标有“100Ω 1A ”字样,将一个表盘如图14(b )所示的电压表并联在电路中。
闭合开关S ,通过R 1的电流为0.6安。
① 求R 1两端的电压U 1。
② 求滑动变阻器R 2的阻值。
③ 在移动滑动变阻器滑片P 过程中,电压表示数的变化量∆U 为8伏。
请判断电压表并联在 两端(选填“R 1”、“R 2”或“电源”),求滑动变阻器R 2的阻值范围。
25. 如图15所示,薄壁轻质柱形容器甲与实心柱体乙放置在水平地面上。
容器甲中装有水,容器甲的底面积是柱体乙的2倍。
在乙的上部沿水平方向切去一部分,并将切去部分浸没在容器甲的水中,水不溢出,此时容器中液面高度与剩余柱体乙的高度相同。
下表记录的是放入前后水对容器底部的压强以及切去前后乙对地面的压强。
① 求容器中水增加的深度Δh 水。
② 求剩余乙对地面的压强p 0。
图1726. 在“测定物质的密度”和“探究物质质量与体积的关系”两个实验中,都需要测量的物理量是 (1) 与 (2) 。
如图16所示,在“验证阿基米德原理”的实验中,V 2-V 1表示 (3) ,物体所受浮力的大小为 (4) 。
27. 图17(a )所示装置的名称是 (5) 。
图17(b )(c )(d )为“探究液体内部的压强与哪些因素有关”实验中的一个情景,从情景中可知:本实验探究的是液体内部压强与 (6) 的关系。
根据实验现象,可得出的结论是 (7) 。
(ρ盐水>ρ水>ρ煤油)28. 在“探究并联电路特点”的实验中,班级同学根据如图18所示电路进行实验,三组同学通过实验获得的数据分别填入下表中。
根据表中数据,可得初步结论是: (8) 。
某同学看了数据后认为第一小组和第二小组的数据是错的,只有第三小组的数据是对的。
你是否同意该同学的观点,请简要说明理由: (9) 。
29. 小华做“用电流表、电压表测电阻”实验,现有电源(电压为6伏保持不变)、待测电阻R x 、电流表、电压表、滑动变阻器有A 、B 两个(A 标有“10Ω 2A ”字样、B 标有“50Ω 1.5A ”字样),开关以及导线若干。
小华选取一个滑动变阻器,连接电路,进行实验,当变阻器滑片P 在中点附近时,电表指针位置如图19(a )、(b )所示,小华记录第一组数据;继续移动滑片P ,使滑动变阻器的电阻减小,两电表指针在图19位置均转过3小格,记录了第二组数据;最后将滑片移至变阻器的一端,发现电流表满偏了,记录第三组数据。
根据上述相关信息判断① 画出小华同学的实验电路图。
(10) ② 通过计算说明滑动变阻器的规格。
(11)③ 计算待测电阻R x 的阻值(精确到0.1欧)。
(12)F 1F 2 V 2V 1图1830. 为了研究柱形容器中水对容器底部的压力增加量∆F水、容器对桌面的压力增加量∆F容与哪些因素有关,某小组同学选用六个物体进行实验。
他们将物体分别放入盛有等质量水的相同容器中,待物体静止后,将实验数据及现象记录在下表中。
① 分析实验序号1~4数据中∆F容与物块重力G的关系,可得出的初步结论:将物块浸没在装有水的容器中,(13)。
② 分析实验序号2~4数据中∆F水与物块体积V的数据及现象,可得出的初步结论:将物块浸没在装有水的容器中,(14)。
③ 小红认为:物块浸没在装有水的容器中,若水溢出,水对容器底部的压强会变小。
根据表格中的实验数据及现象,你认为小红的观点是否正确,请写出理由(15)。
④若将重为6牛、体积为5×10-4米3的物块浸没在上述装有水的容器中静止后,则∆F水为(16)牛,∆F容为(17)牛)假设电压表并联在待测电阻两端-1.8伏)/0.4安≈10.5。