2019—2020广东顺德桂洲中学高考选择题专题训练第五套基础理论第三部分——电解质溶液
2020年广东省佛山市顺德区桂洲中学高三英语第三次联考试题及答案解析
2020年广东省佛山市顺德区桂洲中学高三英语第三次联考试题及答案解析第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AThe Middlerby Kirsty ApplebaumEleven-year-old Maggie lives in Fennis Wick, enclosed and protected from the outside world. Her brother Jed is the eldest, a hero. Her younger brother is Trig—everyone loves Trig. But Maggie's just a middler；she is left behind. In this book, we experience the sadness of being the forgotten middle child, the child with no voice, even in her own family.Dennis in Jurassic Barkby Nigel AuchterlounieBeanotown is in trouble again, and this time the danger is Jurassic! Dennis，latest adventure is filled with fun, including Vikings, Victorians and soon, along with puzzles for you to finish. Can you help Dennis save Beanotown from the prehistoric invasion?Little Book for Big Changesby Karen Ng and Kirsten LiepmannIncluding more than 100 activities, try-outs, games, puzzles and tips,Little Book for Big Changesoffers fun and creative ways to bring people together to help change the world. Understand more about big problems in the world such as inequality and climate change, and be empowered to help make the world a better place.The Saga of Erik the Vikingby Terry JonesIn this illustrated story, Erik the Viking sets out with his trusty team of men in search of the land where the Sun goes at night. On his journey, he will meet adventures that will put his courage to the test.1. Who told a story about an unseen child in a family?A. Terry Jones.B. Kirsty Applebaum.C. Nigel Auchterlounie.D. Karen Ng and Kirsten Liepmann.2. Which book is proper for kids who love prehistoric-related stories?A.The Middler.B.Little Book for Big Changes.C.Dennis in Jurassic Bark.D.The Saga of Erik the Viking.3. What is special aboutLittle Book for Big Changes"!A. It is about two people.B. It is an adventure book.C. It has picturesinside to help kids read.D. It teaches kids to care for the world.BBritish anthropologists (人类学家) Russell Hill and Robert Barton of the University of Durham, after studying the results of one-on-one boxing, tae kwon do, Greco-Roman wrestling and freestyle wrestling matches at the Olympic Games, conclude that when two competitors are equally matched in fitness and skill, the athlete wearing red is more likely to win.Hill and Barton report that when one competitor is much better than the other, colour has no effect on the result. However, when there is only a small difference between them, the effect of colour is enoughtipthe balance. The anthropologists say that the number of times red wins is not simply by chance, but that these results are statistically significant.Joanna Setchell, a primate (灵长目动物) researcher at the University of Cambridge, has found similar results in nature. She studies the large African monkeys known as mandrills. Mandrills have bright red noses that stand out against their white faces. Setchell’s work shows that the powerful males — the ones who are more successful with females — have a brighter red nose than other males.As well as the studies on primates by Setchell, another study shows the effect of red among birds. In an experiment, scientists put red plastic rings on the legs of male zebra finches and this increased the birds’ success with female zebra finches, Zebra finches already have bright red beaks (鸟喙), so this study suggests that, as with Olympic athletes, an extra flash of red is significant. In fact, researchers from theUniversityofGlasgowsay that the birds’ brightly coloured beaks are an indicator of health. Jonathan Blount, a biologist, andhis colleagues think they have found proof that bright red or orange beaks attract females because they mean that the males are healthier. Nothing in nature is simple, however, because in species such as the blue footed booby, a completely different colour seems to give the male birds the same advantage with females.Meanwhile, what about those athletes who win in their events while wearing red? Do their clothes give them an unintentional advantage? Robert Barton accepts that “that is the implication” of their findings. Is it time for sports authorities to consider new regulations on sports clothing?4. According to their research. Hill and Barton conclude that ________.A. the colour of clothing has an effect on most sport eventsB. red should be the choice of colour for clothing in sportsC. red plays a role when competitors are equally capableD. athletes perform better when surrounded by bright red5. The underlined word “tip” in Paragraph 2 is closest in meaning to ________.A. achieveB. advanceC. keepD. change6. The example of the blue footed booby proves that ________.A. male birds use different body parts to draw attentionB. red is not the only colour to attract female birdsC. blue gives female birds the same advantageD. blue can indicate how healthy a bird is7. What can be inferred from the passage?A. The colour red gives male animals the most advantage.B. Male zebra finches prefer to have red plastic rings on their legs.C. Rules on sports clothing are going to be changed.D. Athletes wearing red may have an advantage over their opponents.CWhen I was a kid, my mom set aside some breakfast food for supper every nowand then. I remember one night after a long, hard day at work, my mom placed a plate of eggs, sausage, and a plate of extremely burnt biscuits on the table. I waited to see if my dad would get annoyed.All my dad did was to reach for the biscuits, smile at my mom and ask me how my day at school had been. I don't remember what I told him that night but I do remember watching him add butter and jelly on that ugly burnt biscuit and ate every bite of that thing. He never made a face nor uttered a word about it!When I rose from the table that evening, I remember hearing my mom apologize to my dad for overcooking the biscuits and I will never forget what he said, “Honey, I love burnt biscuits every now and then."Later that night, I went to say good night to my daddy, and I wondered if he really liked his biscuits burnt. He wrapped me up in his arms and said gently, "Your mom put in a hard day at work today and she is really tired. Besides, a little burnt biscuit never hurt anyone!As I have grown older, I've thought about that many times. Life is full of imperfect things and imperfect people. Learning to accept each other's faults and choosing to celebrate each other's differences contribute to ahealthy, growing, and lasting relationship. We could extend this philosophy to any relationship, such as a husband-wife, parent-child, or friendship. Don't put the key to your happiness in someone else's pocket. Keep it in your own. So, please pass me a biscuit, and yes, the burnt one will do just fine.8. How did the author's dad react to the burnt biscuit?A. He set it aside for breakfast.B. He ate butter and jelly instead.C. He uttered his complaints loudly.D. He ate it up as if nothing happened.9. Which of the following words can best describe the author's dad?A. Caring.B. Determined.C. ProudD. Hardworking.10. What does the author suggest people do in the last paragraph?A. Show understanding to imperfect things.B. Ask the children to respect their parents.C. Enjoy the over-cooked biscuits willingly.D. Make important decisions on your own.11. In which section of a magazine may this passage appear?A. History and culture.B. Family and relationship.C. Cuisine and health.D. Entertainment and sports.DChimps use loud calls and gestures to make their feelings known but until now, the exact meaning for individual movements has remained a mystery. Now researchers believe they have translated the key gestures used in the chimp community and identified their intentions for the first time.From 4,351 gestures, experts were able to identify 66 that are used for 19 specific message meanings, including showing a foot to tell a child they can climb on their back. The researchers were able to narrow down these 66 gestures to 36 that are used intentionally to achieve 15 purposes. The translations were made by Dr Catherine Hobaiter and her colleagues at St Andrews University in Scotland.Dr Hobaiter used behavior sampling and filmed all recorded cases of gestural communication. Other gestures include stomping their feet to ask another chimp to stop what they are doing, and slapping objects together to ask another to follow them. Of the 19 meanings,17 encouraged interactions to start, or to develop, such as “move closer,” and “change play”. Some of the gestures were found to have more than one meaning. and only 10 of the66 gestures were used for only a single meaning.Researchers collected a total of 471 video clips from two social groups of chimps at a shelter near Kinshasa, Democratic Republic of Congo. As well as identifying what the gesture means, they also discovered the technique needed to increase the chances of success.“Human children use gestures to communicate before they produce their first words, and their earliest gestures typically appear around 10 months of age,” explained the researchers. “In great apes, there is good evidence that language-trained individuals are capable of acquiring and understanding signals, but this is far less clear in their natural communication. ”12. Chimps slap the objects to____________.A. tell others to stop what they are doingB. ask others chimps to join themC. gather other chimps to move closerD. encourage interactions to start13. What did researchers find after studying 471 video clips?A. Chimps trained in language are good at understanding signals.B. Two social groups of chimps live at a shelter near Kinshasa.C. Language-trained individuals do well in natural communication.D. Chimps’earliest gestures appear around 10 months of age.14. How is the last paragraph developed?A. By analyzing causes.B. By examining differences.C By making comparisons. D. By following time order.15. What can be a suitable title for the text?A A New Research on Chimps B. Human Children and ChimpsC. Getting the Chimps Trained for LanguageD. Translating the Sign Language of Chimps第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
广东顺德桂洲中学高考选择题专题训
20XX-2021广东顺德桂洲中学高考选择题专题训练第七套金属元素及其化合物一．选择题(本题包括9小题，每小题3分，共27分。
每小题只有一个．．．．选项符合题意) 1．微量元素是指在人体内总含量不到万分之一，重量总和不到人体重量的千分之一的20多种元素，这些元素对人体正常代谢和健康起着重要作用，下列各组元素全部属于微量元素的是 ( )A．Na，K，Cl，S，O B．F，I，Fe，Zn，CuC．N，H，0，P，C D．Ge，Se，Ca，Mg，C2.定向爆破建筑物时，应同时定向切断钢筋和炸碎水泥，除要用适宜的猛烈炸药外，还需用( )A．氧炔焰B．铝热剂 C．液氧D．电弧3.制备卤磷酸钙荧光粉所用的高纯氯化钙中混有镁杂质，除去的方法是把氯化钙的水溶液加热到90-95℃，在不断搅拌下加入适当的沉淀剂，使镁生成沉淀过滤除去。
此沉淀剂最好选用( )A．氢氧化钙乳浆 B．碳酸钠溶液C．碳酸氢钠溶液 D．氢氧化钠溶液4.X、Y、Z、M、N都是含钠元素的化合物，它们分别与硫酸或氢氧化钠溶液反应，表示如下：①X+H2SO4→M+V↑②Y+H2SO4→M+U↑+H2O ③Z+H2SO4→M+U↑+W↓(淡黄色)+H2O ④X+Y+H2SO4→M+W↓(淡黄色)+H20 ⑤N+Na0H→M+H20则下列判断不正确的是A．X是NaHSO3B．Y是Na2SO3 C．M是Na2SO4D．Z是Na2S2035.在铁和铜的混合物中，加入一定量的稀硝酸，使之充分反应，剩余金属m1g，再向其中加入一定量的稀硫酸，充分振荡后，剩余金属m2 g，则m1与m2关系是( )A．m1一定大于m2B．m1可能大于m2C．m1可能等于m2D．m1一定等于m26.在a LAl2(SO4)3和(NH4)2SO4的混合物溶液中加入b molBaCl2，恰好使溶液中的SO42－离子完全沉淀；如加入足量强碱并加热可得到c molNH3气，则原溶液中的Al3+离子浓度（mol·L －1）为CA ．a c b 22-B ．a c b 22-C ．a c b 32-D ．a c b 62- 7.相同质量的下列物质分别与等浓度的NaOH 溶液反应，至体系中均无固体物质，消耗碱量最多的是AA ．AlB ．Al(OH)3C ．AlCl 3D ．Al 2O 38.研究反应物的化学计量数与产物之间的关系时，使用类似数轴的方法可以收到的直观形象的效果。
2019—2020广东顺德桂洲中学高考选择题专题训练第一套基本概念1
2019—2020广东顺德桂洲中学高考选择题专题训练第一套基本概念1第一套差不多概念一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个．．．．选项符合题意)1、许多国家十分重视海水资源的综合利用。
不需要化学变化就能够从海水中获得的物质是A、氯、溴、碘B、钠、镁、铝C、烧碱、氢气D、食盐、淡水2．关于胶体的表达中不正确的选项是A.长江三角洲的形成与胶体有关B.不同的墨水不能混用C.胶体能够发生丁达尔现象，乳浊液也能发生D. Fe3＋的净水作用与胶体有关3．以下表达正确的选项是A.在氧化还原反应中，确信有一种元素被氧化，另一种元素被还原B.有单质参加的反应一定是氧化还原反应C.有单质参加的化合反应一定是氧化还原反应D.失电子难的原子，容易获得的电子4. NaClO3 + 6HCl == NaCl + 3Cl2 + 3H2O，那么氧化产物和还原产物的质量比是A 6：1B 5：1C 3：1D 2：15.以下离子方程式中正确的选项是A．硫酸镁溶液和氢氧化钡溶液反应SO42-+Ba2+ ==BaSO4↓B. 用大理石与盐酸制取CO2：CO32－＋2H＋H2O＋CO2↑C．苯酚钠溶液中通入少量CO2：2C6H5O－＋CO2＋H2O→2C6H5OH＋CO 32－D．等体积等物质的量浓度的NaHCO3和Ba(OH)2两溶液混合：HCO3- + Ba2+ + OH-== BaCO3↓ + H2O6.〔08山东卷〕以下由事实得出的结论错误的选项是〔〕A．维勒用无机物合成了尿素，突破了无机物与有机物的界限B．门捷列夫在前人工作的基础上发觉了元素周期律，讲明科学研究既要继承又要创新C．C60是英国和美国化学家共同发觉的，表达了国际科技合作的重要性D．科恩和波普尔因理论化学方面的奉献获诺贝尔化学奖，意味着化学已成为以理论研究为主的学科7.〔08广东卷〕在以下变化过程中，只发生物理变化的是〔〕A．荔枝酿酒B．酸雨腐蚀建筑物C．空气液化制取氮气D．生石灰遇水成为熟石灰8.〔08广东卷〕依照陈述的知识，类推得出的结论正确的选项是〔〕A．镁条在空气中燃烧生成的氧化物是MgO，那么钠在空气中燃烧生成的氧化物是Na2O B．乙烯可使酸性高锰酸钾溶液褪色，那么丙烯也能够使其褪色C．CO2与SiO2化学式相似，那么CO2与SiO2的物理性质也相似D．金刚石的硬度大，那么C60的硬度也大9.类推的思维方法在化学学习与研究中常会产生错误的结论，因此类推的结论最终要通过实践的检验才能确定其正确与否。
2020年广东省佛山市顺德区桂洲中学高三语文第三次联考试题及参考答案
2020年广东省佛山市顺德区桂洲中学高三语文第三次联考试题及参考答案一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文章，完成下面小题挺拔之姿朱以撒晋人普遍有好竹之癖，打开魏晋史册，一群生机勃勃我行我素的人就涌了出来，在山阴道上的竹林深处，放浪形骸，快然自足，得大自在。
这当然是我三十几岁以后才意识到的。
我和魏晋间人相近之处，就是有过比较长的山野生活，与竹相近。
常常会站在山顶，看山峦连绵起伏，竹海无际。
那时我想着自己的出路，如果能像一竿竹子这般凌空而起那就好了。
竹海里纤尘不染，枝叶让天水洗净，摇曳中偶尔闪过阳光的光泽，它们的顶端是最先接触到每一天太阳的光芒的，不禁使我艳羡。
山野稼穑，先是基于温饱的认识——每一竿竹都可以构成生存的支架，把一个个家庭托住，不至于坠入饥寒之中。
而每一枚笋，春日之笋也罢，冬日之笋也罢，对于一位腹内空洞的人而言，简单地烹调之后，无异于美味了。
那些没有成为餐桌美味者，不舍昼夜继续伸长，令人仰望。
那些被山农认为是成熟了的竹子，在叮叮咚咚的刀斧声中倒下，削去枝叶，顺着规划好的坡道滑下，被长长的平板车载着，进入再加工的程序。
和竹子一样，人也是善于生存的植物，贫瘠清苦中也会挣扎着生长。
我注意到一些竹子的确没有长好，是吃力地拱出石块的，此后也就一直不能顺畅，总是被压制着扭曲着，不禁让人生出怜悯。
只是我一直认为它会更具备倔强的美感，它的根后来制成了一个老者形象的工艺品，比其他的更有铁枝虬干的峥嵘了。
待到我在鹤峰原度假，已经到了闲适的年龄了。
风随夕阳西下而愈加强劲，一些植物已在形态上仓皇失措，叶片翻飞如鸟兽惊散。
竹林在随风俯仰中显示了一种从容，在徐徐的摇曳里，山野之风的张狂之力往往被斯文地化解开来。
在魏晋的文字中有不少“徐徐”的记录，“徐徐”看起来只是肢体上的动作，实则是内心的从容优雅。
内心慢了，整个人的举止也就慢了，斯文了，有风度了。
竹被称为四君子之一，它在四君子中是最为清俊的，风来了，风过了，余韵袅袅。
2019—2020广东顺德桂洲中学高考选择题专题训练第十一套有机化合物第二部分——烃的衍生物
2019—2020广东顺德桂洲中学高考选择题专题训练第十一套有机化合物第二部分——烃的衍生物第十一套有机化合物第二部分——烃的衍生物一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个．．．．选项符合题意)1. 以下各化合物的命名中正确的选项是DA．CH2=CH－CH=CH2 1，3—丁二烯B．C．甲基苯酚D． 2—甲基丁烷2. 将用于2018年北京奥运会的国家游泳中心(水立方)的建筑采纳了膜材料ETFE，该材料为四氟乙烯与乙烯的共聚物，四氟乙烯也可与六氟丙烯共聚成聚全氟乙丙烯。
以下讲法错误的选项是．．．．．．CA．ETFE分子中可能存在〝—CH2—CH2—CF2—CF2—〞的连接方式B．合成ETFE及合成聚全氟乙丙烯的反应均为加聚反应C．聚全氟乙丙烯分子的结构简式可能为CF2CF2CF2CF2CF2nD．四氟乙烯分子中既含有极性键又含有非极性键3. 丁基共有4种，不必试写，赶忙可确信分子式为C5H10O的醛应有A．3种B．4种C．5种D．6种4. 化合物丙由如下反应得到：丙的结构简式不可能是A．CH3CH2CHBrCH2Br B．CH3CH(CH2Br)2C．CH3CHBrCHBrCH3 D．(CH3)2CBrCH2Br5. 用10 g脱脂棉与足量浓硝酸一浓硫酸混合液反应，制得15.6 g纤维素硝酸酯，那么每个葡萄糖单元中发生酯化反应的羟基数是A．3 B．2 C．1 D．不可运算6. 0.1 mol某有机物的蒸气跟足量的O2混合后点燃，反应后生成13.2 g CO2和5.4 gH20，该有机物能跟Na反应放出H2，又能跟新制Cu(OH)2反应生成红色沉淀，此有机物还可与乙酸反应生成酯类化合物，该酯类化合物的结构简式可能是D7. 在核磁共振氢谱中显现两组峰，其氢原子数之比为3︰2的化合物是D8.黄曲霉素AFTB1是污染粮食的真菌霉素。
人类的专门基因在黄曲霉素的作用下会发生突变。
有转变成肝癌的可能性。
2019—2020广东顺德桂洲中学高考选择题专题训练第四套基础理论第二部分——化学反应速率化学平衡
2019—2020广东顺德桂洲中学高考选择题专题训练第四套基础理论第二部分——化学反应速率化学平衡第三套 基础理论第二部分——化学反应速率、化学平稳一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个．．．．选项符合题意) 1. 一真空密闭容器中盛有a molA ，加热到200℃时发生如下反应n A(气) B(气)+C(气)，反应平稳时，A 所占体积分数为M ％。
假设在同一温度和同一容器中，最初放入的是2a molA ，反应平稳时，A 所占体积分数为N ％。
那么M 和N 的正确关系是 〔 〕A ．M>NB ．M<NC ．M=N D.无法比较2．X 、Y 、Z 为三种气体，把a molX 和b molY 克入一密闭容器中，发生反应X+2Y 2Z ．达到平稳时，假设它们的物质的量满足：n(X)+n(Y)=n(Z)，那么Y 的转化率为 ( B )3. 一定条件下，在体积为10 L 的密闭容器中，1 mol X 和1 mol Y 进行反应：2X(g)＋Y(g)Z(g)，经60 s 达到平稳，生成0.3 mol Z ，以下讲法正确的选项是A.以X 浓度变化表示的反应速率为0.001 mol/(L ·s)B.将容器体积变为20 L ，Z 的平稳浓度变为原先的1/2C.假设增大压强，那么物质Y 的转化率减小D.假设升高温度，X 的体积分数增大，那么该反应的∆H ＞04. 如图是恒温下某化学反应的反应速率随反应时刻变化的示意图，以下表达与示意图不相．．符合．．的是 0反应速率平衡态Ⅰv (正)v (逆)平衡态Ⅱv (正)′v (逆)′A.反应达平稳时，正反应速率和逆反应速率相等B.该反应达到平稳态I 后，增大反应物浓度，平稳发生移动，达到平稳态IIC.该反应达到平稳态I 后，减小反应物浓度，平稳发生移动，达到平稳态IID.同一种反应物在平稳态I 和平稳态II 时浓度不相等a+b A.100%5⨯2(a+b)B.100%5b ⨯2(a+b)C.100%5⨯a+b D.100%5a⨯5. 在相同温度和压强下，对反应 CO 2 ( g ) + H 2 ( g )CO(g ) + H 2O( g 〕进行甲、乙、丙、丁四组实验，实验起始时放入容器内各组分的物质的量见下表：上述四种情形达到平稳后， n ( CO 〕的大小顺序是 AA ．乙＝丁＞丙＝甲B ．乙＞丁＞甲＞丙C ．丁＞乙＞丙＝甲D ．丁＞丙＞乙＞甲 6. 高温下，某反应达到平稳，平稳常数)H ()CO ()O H ()CO (222c c c c K ⋅⋅=。
2019—2020广东顺德桂洲中学高考选择题专题训练第三套基础理论第一部分——物质结构元素周期律
2019—2020广东顺德桂洲中学高考选择题专题训练第三套基础理论第一部分——物质结构元素周期律第三套基础理论第一部分——物质结构元素周期律一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个．．．．选项符合题意)1.HBr分子的电子式为〔A 〕2.以下化合物，按其品体的熔点由高到低排列正确的选项是〔〕A．SiO2CaCl CBr4 CF2B．SiO2 CsCl CF4 CBr4C．CsCl SiO2CBr4 CF4 D．CF4 CBr4 CsCl SiO23. 以下各组给定原子序数的元素，不能．．形成原子数之比为1∶1稳固化合物的是〔〕A．3和17 B．1和8 C．1和6 D．7和124. 2007年诺贝尔化学奖得主Gerhard Ertl对金属Pt表面催化CO氧化反应的模型进行了深入研究。
以下关于20278Pt的讲法正确的选项是〔〕A．20278Pt和19878Pt的质子数相同，互称为同位素B．20278Pt和19878Pt的中子数相同，互称为同位素C．20278Pt和19878Pt的核外电子数相同，是同一种核素D．20278Pt和19878Pt的质量数不同，不能互称为同位素5. 自然界氧的同位素160、17O、18O，氢的同位素有H、D，从水分子的原子组成来看。
自然界的水一共有( )A．3种B．6种C．9种D．12种6. 以下离子化合物中，阴、阳离子所含的电子数不相等的是( )A．Na2O2B．NaNH2C．NaF D．Mg(OH)27. 某元素X最高价含氧酸的分子量为98，且X的氢化物的分子式不是H2X那么以下讲法正确的选项是( )A．X的最高价含氧酸的分子式可表示为H3XO4 B．X是第二周期V A族元素C ．X 是第二周期ⅥA 族元素D ．X 的最高化合价为+48. 元素X 、Y 和Z 可结合形成化合物XYZ 3；X 、Y 和Z 的原子序数之和为26；Y 和Z 在同一周期。
以下有关估量正确的选项是〔 〕A ．XYZ 3是一种可溶于水的酸，且X 与Y 可形成共价化合物XYB ．XYZ 3是一种微溶于水的盐，且X 与Z 可形成离子化合物XZC ．XYZ 3是一种易溶于水的盐，且Y 与Z 可形成离子化合物YZD ．XYZ 3是一种离子化合物，且Y 与Z 可形成离子化合物YZ 3二、选择题〔此题包括9小题，每题4分，共36分。
2019—2020广东顺德桂洲中学高考选择题专题训练第十套有机化合物第一部分——烃
2019—2020广东顺德桂洲中学高考选择题专题训练第十套有机化合物第一部分——烃第十套有机化合物第一部分——烃一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个．．．．选项符合题意)1.以下各组物质不属于．．．同分异构体的是DA．2,2－二甲基丙醇和2－甲基丁醇B．邻氯甲苯和对氯甲苯C．2－甲基丁烷和戊烷D．甲基丙烯酸和甲酸丙酯2．2018年北京奥运会的〝祥云〞火炬所用燃料的要紧成分是丙烷，以下有关丙烷的表达中不正确的选项是CA．分子中碳原子不在一条直线上B．光照下能够发生取代反应C．比丁烷更易液化D．是石油分馏的一种产3.二十世纪化学合成技术的进展对人类健康平和生活质量的提高做出了庞大奉献。
以下各组物质全部由化学合成得到的是CA．玻璃纤维素青霉素B．尿素食盐聚乙烯C．涤沦洗衣粉阿斯匹林D．石英橡胶磷化铟4.以下表达正确的选项是BA．汽油、柴油和植物油差不多上碳氢化合物B．乙醇能够被氧化为乙酸，二者都能发生酯化反应C．甲烷、乙烯和苯在工业上都可通过石油分馏得到D．含5个碳原子的有机物，每个分子中最多科形成4个C—C单键5. 在①丙烯②氯乙烯③苯④甲苯四种有机化合物中，分子内所有原子均在同一平面的是BA．①②B．②③C．③④D．②④6. 用N A表示阿伏加德罗常数的值。
以下表达正确的选项是CA．常温常压下的33.6 L氯气与27 g铝充分反应，转移电子数为3N AB．标准状况下，22.4 L己烷中共价键数目为19N AC．由CO2和O2组成的混合物中共有N A个分子，其中的氧原子数为2N AD．1 L浓度为1 mol·L-1的Na2CO3溶液中含有N A个CO32-7. 以下有机反应中，不属于取代反应的是BA ．B ．2CH 3CH 2OH+O 22CH 3CHO+2H 2OC ．ClCH 2CH=CH 2+NaOH HOCH 2CH=CH 2+NaClD ．8. 在一条件下，将A 、B 、C 三种炔烃所组成的混合气体4g 在催化剂作用下与过量的氢气发生加成反应，可生成4.4g 对应的三种烷烃，那么所得烷烃中一定有 A ．戊烷 B ．丁烷 C ．丙烷 D ．乙烷 9.石油裂化的要紧目的是为了AA ．提高轻质液体燃料的产量B ．便于分馏C ．获得短链不饱和气态烃D ．提高汽油的质量二、选择题〔此题包括9小题，每题4分，共36分。
2019-2020学年广东省佛山市顺德区桂洲中学高三英语第三次联考试题及答案解析
2019-2020学年广东省佛山市顺德区桂洲中学高三英语第三次联考试题及答案解析第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AMany workers have had no choice but to adapt to working from home in recent months since offices shut down due to the COVID-19 pandemic (新冠疫情). And the noisy situation and endless housework may result in a terrible emotion. A new option is waiting foryou. That is WFH: work from a hotel.Hotel FigueroA special program titled Work Perks aims to reposition some of 94-year-old Hotel Figuero’s 268 rooms as day-use offices.According to Managing Director Connie Wang, the set-up launched in June and is a great opportunity to get out of their houses with high-speed Wi-Fi, unlimited printing privileges and free parking. The 350-square-foot rooms sell for $ 129 per day, with an option to extend to an overnight stay for an additional $ 20.The WytheA boutique hotel in Brooklyn. The hotel recently announced a partnership with co-working office space company Industrious through which it is recycling 13 second-story guest rooms to serve as offices for up to four people.Each of the rooms has a small outdoor platform, and dogs are welcome. Pricing starts at $ 200 and goes up to $ 275, depending on how many people use the space.The SawyerThe Sawyer, in Sacramento, California, is offering pool cabanas (更衣室) for use as outdoor offices, complete with fast Wi-Fi, free parking and catered lunch for $ 150 per day.HotelsByDayYannis Moati founded HotelsByDay back in 2015. That company has grown to include more than 1,500 hotels, and has seen a significant increase in the number of inquiries for day-use bookings lately.Moati said the current situation will force hotels to upgrade themselves to stay alive, and he predicted that offering rooms for day-use only is one of the directions they will go.1.How much should one pay for a 24-hour stay in Hotel Figuero?A.$ 129.B.$ 149.C.$ 150.D.$ 200.2.Which hotel allows pets in?A.The Wythe.B.The Sawyer.C.HotelsByDay.D.Hotel Figuero.3.What do we know about Yannis Moati?A.He started a program titledWork Perks.B.He has upgraded at least 1,500 rooms.C.He usually predicts everything correctly.D.He is optimistic about the WFH trend.BA male tiger was rescued in Mishan city, Northeast China's Heilongjiang province, on Friday. A tiger was recently seen on the Siner Russian border（边界），but there is no evidence to suggest this is the same tiger or that it had lost its way from Russia.Wherever it may have come from, cross-border protection of endangered species is a problem. According to Ma Jianzhang, a senior wild animal researcher in China, tigers know no borders, which have been built to stop humans from illegally crossing over. However, these borders also stop the free movement of tigers, thus preventing their breeding（繁殖）and exchange of genes.The Sino-Russian border alsocomes in the way ofprotecting tigers in the region. Data show about 500 to 550 Siberian tigers, or over 90 percent of the species, live in the wild in Russia; 27 live in the wild in China, and 50 inthe border region. Sometimes tigers lose their way across the border and that is hindering（妨碍）efforts to stop illegal hunting and protecting them.Fortunately, both China and Russia have realized this problem and are working toward solving it. As early as 2010, the two countries established a cross-border protection network aimed at strengthening communication on protecting tigers in the northeast. The countries have also held anti-poaching（反偷猎）activities together. In 2019, two national parks from the two countries signed a three-year deal to share research data on tigers, greatly improving the living conditions of Siberian tigers in the wild.However, much more needs to be done to protect the species. It is necessary to combine the tiger protection areas in the two countries. That will require greater efforts from both sides and some difficulties might remain even then. Fortunately, both countries have been taking effective measures to provide the endangered species a better home.4. What's the original purpose of setting up the Sino-Russian borders?A. To ban people from illegal crossings.B. To help protect tigers in the region.C. To protect tigers from losing their way.D. To stop tigers' breeding and exchange of genes.5. What does the underlined phrase “comes in the way of” probably mean?A. keeps from.B. is on the way toC. is aimed atD. keeps up6. What is the focus of Paragraph 4 ?A. Recent studies and researches on tigers.B. Joint efforts by China and Russia to protect tigers.C. The possible effects of establishing a networkD. Reasons for improving the living conditions of tigers.7. What's the author's purpose in writing the text?A. To inform the possible dangers of tiger protection.B. To cover the news about a missing tiger on the border.C. To put forward suggestions on finding the missing tiger.D. To report the problems and measures of cross-border tiger protection.CAs we all know, there are plenty of different parks to visit in theUK. All theme parks inBritainhave cafes, restaurants, picnic areas and gift shops, so you'll still have plenty to see and do when you and the kids have been on enough rides. There are usually smaller “funfair“ rides and games as well, so younger children won't get bored. Several theme parks also have other attractions next to them, e. g. water parks often open all year round, unlike the theme parks.Whenever you are inBritain, there's likely to be a theme park within one or two hours,drive, bus ride or train journey. Several theme parks even have accommodation(膳宿)so you can stay for a day or two if you want to make a trip into a short holiday.Prices forUKtheme parks vary considerably; some have an entrance price which allows you to go on all the rides, while in others you have to pay for every ride individually. It can also make a difference whether you go during peak time or not. For example, tickets always cost more during school holidays and weekends than they do during the weekdays.Theme parks always get very busy during the summer months, so if you don't like crowds ifs usually a good idea to go earlier or later in the year!If you're thinking of visiting aUKtheme park, it's worth having a look for special offers on tickets. Products such as chocolate bars and cereals sometimes have " buy one get one free" offers on theme park tickets, so keep a look out in shops and supermarkets.8. This passage mainly talks about all the following EXCEPT.______.A. things to doB. prices for theme parksC. rules to obeyD. special offers9. If you go to the theme park during the weekdays, you'll probably.______.A. have to spend moreB. save some moneyC. win a big prizeD. get something free10. According to the passage, what should you do if you are tired of crowds in the theme park?A. Avoid the busiest months.B. Go earlier or later in the daytime.C. Choose one with few visitors.D. Go there when no one is in it.11. The best title for the text would be ______.A. What to Do in the Theme ParkB. Theme Parks in theUKC. Visiting the Theme ParkD. Introduction to Famous Theme ParksDThis past year, I've found myself returning again and again to lines of poetry by Emily Dickinson. Like many people, I've needed the curing effects of reading more than ever. As scientists and psychologists will tell you, books are good for the brain and their benefits are particularly vital now.Books expand our world, providing an escape and offering novelty, surprise and excitement. They broaden our view and help us connect with others. Books can also distract us and help reduce ourmental chatter.When we hit the “flow state" of reading where we're fully lost in a book, our brain's mode network calms down. It's a network of brain that is active and gets absorbed in thinking and worrying endlessly when we are not doing anything else.There is so much noise in the world right now and the very act of reading is kind of meditation. You disconnect from the chaos around you.You reconnect with yourself when you are reading. And there's no more noise.In 2020, the NPD Group recorded the best year of book sales since 2004. Yet even as people are buying morebooks,many are reporting they're having a harder time getting through them. It's difficult for your brain to focus on a book when it's constantly scanning for threats to keep you alive.Our fight-or-flight response has been consistently activated.Sometimes I picture my brain as a cartoon brain with little arms and legs, fighting with a book I am holding and screaming: “Can't you see I'm busy!” Anxiety causes our brain to produce a flood of stress,which consumes our energy and makes it harder to concentrate.Then one day in December sitting on my couch, I remembered how much I like to read"The House of Mirth" every few years around the holidays. The memory inspired me to pick up the familiar book, opened it up and started reading.I just kept going.The comfort and distraction and brain-opening experience gave me peace.So return to something familiar.12. What does the underlined part “mental chatter” in Paragraph 2 mean?A. Getting lost in a book.B. Non-stop inner anxiety.C. Chatting with the author.D. Powerful network of brain.13. What do we know about reading according to the text?A. It can treat our headache.B. It can calm down the noisy people.C. It forces us to concentrate.on thinking.D. It makes us communicate with ourselves.14. Why was it difficult for people to finish reading books in 2020?A. People bought too many books.B. The books were too difficult to understand.C. People just wanted to escape from the threat.D. The life threat disturbed people's focus on books.15. Why is the author's experience mentioned in the last paragraph?A. To rid people of concern for safety.B. To present an effective reading way.C. To wake up memories of an old book.D. To recommend the book he/she reads.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2019-2020学年广东省佛山市顺德区桂洲中学高三生物第三次联考试卷及参考答案
2019-2020学年广东省佛山市顺德区桂洲中学高三生物第三次联考试卷及参考答案一、选择题：本题共15小题，每小题2分，共30分。
每小题只有一个选项符合题目要求。
1. 下列有关动物细胞减数分裂和受精作用的叙述，错误的是（）A. 在减数分裂过程中，细胞分裂两次，染色体也复制两次B. 在减数第一次分裂过程中，有同源染色体的配对联会、同源染色体分离等行为C. 在减数分裂过程中，着丝点分裂发生在减数第二次分裂D. 受精卵中的染色体一半来自父方，一半来自母方，但细胞质基因主要来自母方2. 人体接种流感疫苗，一段时间后体内出现相应的抗体。
人体产生抗体的细胞是（）A. 吞噬细胞B.T细胞C. 靶细胞D. 浆细胞3. 下列是减数分裂过程中的几个步骤，选出减数第一次分裂的步骤并排出正确的顺序的是（）①形成四分体①同源染色体分离①交叉互换①细胞质分离①联会①染色体复制①染色单体分开①着丝点分裂A.①①①①B.①①①①①①①C.①①①①①①D.①①①①①①4. 果蝇的灰体和黄体受一对等位基因控制，但相对性状的显隐性关系和该等位基因所在的染色体是未知的。
某同学用一只灰体雌蝇与一只黄体雄蝇杂交，子代中♀灰体：♀黄体：♂灰体：♂黄体为1：1：1：1。
下列说法错误的是（）A. 若基因位于常染色体上，无法确定显隐性B. 若基因只位于X染色体上，则灰色为显性C. 若黄色为显性，基因一定只位于常染色体上D. 若灰色为显性，基因一定只位于X染色体上5. 下列叙述错误的是（）A. 受精卵没有分化，所以没有全能性B. 细胞的分化程度越高，表现出来的全能性就越弱C. 脐带血中含有大量的干细胞，可以培养并分化成人体的各种血细胞D. 在个体发育过程中，不同种类的细胞中遗传信息的表达情况不同6. 下列有关孟德尔豌豆杂交实验的叙述，正确的是（）A.孟德尔在豌豆开花时进行去雄和授粉，实现亲本的杂交B.孟德尔研究豌豆花的构造，但无需考虑雌蕊、雄蕊的发育程度C.孟德尔根据亲本中不同个体表现型来判断亲本是否纯合D.孟德尔利用了豌豆自花传粉、闭花受粉的特性7. 红苋菜细胞的液泡内含有呈紫红色的花青素。
2019—2020广东顺德桂洲中学高考选择题专题训练第六套基础理论第三部分——电化学
2019—2020广东顺德桂洲中学高考选择题专题训练第六套基础理论第三部分——电化学第六套基础理论第三部分——电化学一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个．．．．选项符合题意)1.关于铅蓄电池的讲法正确的选项是〔〕A．在放电时，正极发生的反应是Pb(s) +SO42—〔aq〕= PbSO4(s) +2e—B．在放电时，该电池的负极材料是铅板C．在充电时，电池中硫酸的浓度不断变小D．在充电时，阳极发生的反应是PbSO4(s)+2e—= Pb(s)+ SO42—〔aq〕2. 取一张用饱和的NaCl溶液浸湿的pH试纸，两根铅笔芯作电极，接通直流电源，一段时刻后，发觉a电极与试纸接触处显现一个双色同心圆，内圈为白色，外圈呈浅红色。
那么以下讲法错误的选项是( )A．b电极是阴极B．a电极与电源的正极相连C．电解过程中水是氧化剂D．b电极邻近溶液的pH变小3. 电解100mL含c〔H+〕＝0.30mol/L的以下溶液，当电路中通过0.04mol电子时，理论上析出金属质量最大的是〔〕A．0.10mol/LAg+ B．0.02mol/L Zn2+C．0.20mol/L Cu2+ D．0.20mol/L Pb2+4.用铜片、银片、Cu (NO3)2溶液、AgNO3溶液、导线和盐桥〔装有琼脂-KNO3的U型管〕构成一个原电池。
以下有关该原电池的表达正确的选项是〔〕①在外电路中，电流由铜电极流向银电极②正极反应为：Ag++e-=Ag③实验过程中取出盐桥，原电池仍连续工作④将铜片浸入AgNO3溶液中发生的化学反应与该原电池反应相同A．①②B．②③C．②④D．③④5.镍镉〔Ni-Cd〕可充电电池在现代生活中有广泛应用。
某镍镉电池的电解质溶液为KOH溶液，其充、放电按下式进行：Cd + 2NiOOH + 2H2O放电Cd(OH)2 + 2Ni(OH)2有关该电池的讲法正确的选项是〔〕A．充电时阳极反应：Ni(OH)2－e—+ OH- == NiOOH + H2OB．充电过程是化学能转化为电能的过程C．放电时负极邻近溶液的碱性不变D．放电时电解质溶液中的OH-向正极移动6.一种燃料电池中发生的化学反应为：在酸性溶液中甲醇与氧作用生成水和二氧化碳。
2020届广东省佛山市顺德区桂洲中学高三生物第三次联考试卷及答案
2020届广东省佛山市顺德区桂洲中学高三生物第三次联考试卷及答案一、选择题：本题共15小题，每小题2分，共30分。
每小题只有一个选项符合题目要求。
1. 膜蛋白在生物体生命活动中起着非常重要的作用，膜蛋白的功能是多方面的，如细胞的增殖和分化、能量转换、信号转导及物质运输等。
据估计有大约60%的药物作用靶点是膜蛋白。
下列有关分析错误的是（）A.有些膜蛋白的数量可决定物质跨膜运输的速率B.有些膜蛋白是激素或其他化学物质的专一受体C.膜蛋白一般不能催化专一的化学反应D.很多膜蛋白在磷脂双分子层中能够移动2. 雨水过多时，农作物会发生烂根现象，其原因主要是A.土壤中缺乏氧气，根进行无氧呼吸产生酒精，对根细胞有毒害作用B.土壤中水分充足，微生物繁殖而引起烂根C.土壤中有毒物质溶解到水中，使根遭到毒害D.土壤因水涝温度低，使根受到低温损害3. 下图是青蛙离体的神经－肌肉标本。
BC段和CD段的距离相等，如果在肌肉处用电刺激，关于兴奋的传导下列说法正确的是( )A.兴奋在神经纤维BC段上传导的速度和在CD段突触间的传递速度是一样的B.D点接受刺激，则在A、B、C三处，都不能测到膜内外电位差的变化C.肌肉在反射弧的组成中，就是效应器D.突触的结构决定了兴奋以电信号形式在神经元之间传导时，传导方向是单向的4. 月季花有红花、白花等多种品种，一株原本只开红花的月季植株现在却开出了一朵白花。
下列与该变异相关的叙述，错误的是（）A.该变异可能来源于白花植株传粉后的基因重组B.该变异可能来源于有丝分裂过程中红花基因所在的染色体片段缺失C.该变异可能是红花基因控制合成的酶的种类发生改变所致D.该变异的直接原因可能是花瓣细胞液中的色素发生了改变5. 艾滋病（AIDS）是由人类免疫缺陷病毒（HIV）引起的，该病毒是逆转录病毒，它能精确地识别并侵入CD4+T细胞（辅助性T细胞），逐渐使免疫系统瘫痪、功能瓦解，最终使患者死于严重感染或恶性肿瘤。
2019-2020学年广东省佛山市顺德区桂洲中学高三生物下学期期末考试试卷及参考答案
2019-2020学年广东省佛山市顺德区桂洲中学高三生物下学期期末考试试卷及参考答案一、选择题：本题共15小题，每小题2分，共30分。
每小题只有一个选项符合题目要求。
1. 模型主要包括物理模型、概念模型和数学模型三种。
下列说法错误的是（）A.真核细胞的三维结构模型和拍摄的细胞亚显微结构照片均是物理模型B.根据章节中知识之间的联系构建的知识体系属于概念模型C.根据有丝分裂过程中染色体的形态变化构建的模型属于物理模型D.酶活性受温度和pH影响的曲线图属于数学模型2. 接种疫苗是预防传染病最有效、最经济的方式。
有些疫苗需两次接种，初次接种产生免疫后，按规定时间间隔再次接种。
若提前进行再次接种，则会减弱二次免疫效果，下列解释合理的是A. 提前接种导致初次免疫产生的记忆细胞凋亡数目少B. 提前接种导致初次免疫产生的浆细胞分泌的抗体少C. 疫苗会与初次免疫后存留抗体结合被迅速清除D. 疫苗会与初次免疫产生的效应T细胞结合被裂解’3. 下列关于人体各级神经中枢及人脑高级功能的描述，错误的是（）A. 饮酒过量的人语无伦次，其大脑皮层言语区的S区受损B. 短期记忆主要与神经元活动及神经元之间的联系有关C. 成年人可以有意识地憋尿，能体现神经系统的分级调节D. 考试专心答题时，需要大脑皮层言语区的V区、W区参与4. 下列关于几种植物激素的说法，错误的是（）A.细胞分裂素能够促进细胞分裂，促进叶绿素的合成B.当生长素浓度升高到一定值时，就会抑制乙烯的合成C.乙烯能够促进果实成熟，促进叶、花、果实脱落D.脱落酸促进叶和果实的衰老和脱落，维持种子休眠5. 比较植物的有氧呼吸和无氧呼吸，正确的是（）A.葡萄糖是有氧呼吸的主要底物，不是无氧呼吸的主要底物B. CO2是有氧呼吸的产物，不是无氧呼吸的产物C.有氧呼吸逐步释放能量，无氧呼吸瞬间释放能量D.有氧呼吸产生还原性氢，无氧呼吸过程中也能产生还原氢6. （一）酵母菌是常用的工程菌，与我们的生活关联密切，回答相关的生物技术问题。
2020届广东省佛山市顺德区桂洲中学高三生物第三次联考试卷及答案
2020届广东省佛山市顺德区桂洲中学高三生物第三次联考试卷及答案一、选择题：本题共15小题，每小题2分，共30分。
每小题只有一个选项符合题目要求。
1. 下列生物群体中，属于群落的是A.闽江里的全部生物B.黄河里的全部鱼C.武夷山中的全部植物D.太湖中的全部微生物2. 下列有关植物细胞能量代谢的叙述，正确的是A.含有两个高能磷酸键的ATP是DNA的基本组成单位之一B.加入呼吸抑制剂可使细胞中ADP生成减少，A TP生成增加C.无氧条件下，丙酮酸转变为酒精的过程中伴随有ATP的合成D.光下叶肉细胞的细胞质基质、线粒体和叶绿体中都有ATP合成3. 细胞内分布着丰富的微管，微管参与纺锤体的构建，其组成的微管桥网络能够组装构成细胞骨架，相邻细胞间可以通过微管桥形成通道。
下列说法正确的是（）A. 构成微管的主要成分是纤维素B. 微管在分裂间期参与纺锤体的构建C. 完全水解微管桥网络后细胞器不会受到任何影响D. 微管与细胞分裂、细胞骨架的组建、细胞间信息的传递密切相关4. 下列各项生物中，都属于真核生物的是（）A.流感病毒、根霉﹑乳酸菌B.细菌、绿藻、衣原体C.蓝细菌﹑酵母菌、草履虫D.衣藻、变形虫、小麦5. 对于观察蝗虫精母细胞减数分裂的实验，不正确的描述是（）A. 在显微镜视野内，处于分裂间期的细胞数目最多B. 在显微镜视野中存在染色体数目是正常体细胞二倍的细胞C. 所有细胞中，处于分裂中期和后期的细胞最好辨认D. 在高倍显微镜下，可以观察到细胞从精原细胞变为精子的过程6. 如图表示细胞核的结构，下列关于细胞核结构的说法，错误的是（）A.②与②的膜成分很相似B.②能够将核内物质与细胞质分开C.②是细胞代谢和遗传的控制中心D.蛋白质合成旺盛的细胞中，②的数量较多7. 为了探究生长素的作用，将去尖端的玉米胚芽鞘切段随机分成两组，实验组胚芽鞘上端一侧放置含有适宜浓度IAA的琼脂块，对照组胚芽鞘上端同侧放置不含IAA的琼脂块，两组胚芽鞘下端的琼脂块均不含IAA。
2019-2020学年广东省佛山市顺德区桂洲中学高三英语三模试题及参考答案
2019-2020学年广东省佛山市顺德区桂洲中学高三英语三模试题及参考答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AOn Friday morning when 53-year-old Thong Pham broke into the house through the unlocked back door, he took a steak knife from the kitchen.It was dark, and the family didn't know what Marley was barking (吠) at. Taylor, Amber and their girls Finley, 6,and Sadie, 4, soon woke up and came downstairs, too. “Well, it was dark so we couldn't see anything, only could hear Marley,” Amber recalled, saying her husband then went for the lights. “And once he turned the hall light on, we realized that the guy was holed up in the corner trying to hide.”“So I think he got to the front door and realized he couldn't get out, and by that point in time, Marley's got him cornered,”Taylorsaid. Pham slashed (砍) both Marley and Taylor, and blood went everywhere. Taylor shared a video summary to his Facebook page, where he said Marley was stabbed (刺) up to six times, mostly around the head and neck area. “And as I pulled back, blood shot out of my arm,”Taylorcontinued. “She got him pretty good and I got him pretty good in the face.”“But it was really hard because I was trying to make sure that my husband wasn't going to die,” Amber explained, adding that she was trying to protect their two girls. “When he realized that the two girls were in the house, that's when he kind of backed up and started running. "Taylorexpressed gratitude to everyone for their thoughts and prayers. And the family is thankful for their dog Marley.“She's our hero,” Amber said. “If it hadn't been for her, that guy could have gone in the...he could have gone to their rooms or something.”Tayloradded, “Yeah, I mean, the story plays out very differently if Marley's not there.”1. Why did the family come downstairs before daybreak?A. To stop a break-in.B. To lock the back door.C. To check on Marley.D. To turn the hall light on.2. What happened during the fight?A. Pham dug a hole in the corner.B. Marley was injured but bit back.C. Taylor had a backup from neighbors.D. Amber fought back to protect her girls.3. What doesTaylormainly express on his Facebook?A. Forgiveness.B. Concern.C. Anger.D. Appreciation.BWhen my friend suggested going to the op shop (二手商店)，instantly I thought “I hope no one I know sees me”. It was the same when my cousin commented on my new furniture and Japanese, fine-bone-china bowls and asked where I got them. They were from the local op shop but instead I said “from the antique shop”.Many people in my Greek-Cypriot community would look down on me if I said I shopped at the op shop. They may pity me, consider me poor, a failure. Immigrants sacrificed their families and homes for a better life. Buying a house and having enough money to live comfortably, to educate your children and see them also live comfortably, are a big part of the immigrant dream, But has this dream made us materialistic at the cost of our own planet?Our love for purchasing the latest trendy clothes or furniture, then donating them when we are tired of them has become normal. I was once like this. But after watching the documentaryThe True CostI learned donated clothes that don’t get sold are sent to developing nations, many of them ending up in landfills (垃圾填埋地). In addition, your new dress requires electricity and materials to make. But if you buy a second-hand dress, that’s one less dress in a landfill and one less new dress to be made.A friend introduced me to op shopping only a few years ago. My firstitem was a dress she gifted me. It was lovely and I loved it. Nobody could tell it was second-hand. This opened me up to purchasing more second-hand high quality branded clothes. Once I visited a friend and was impressed by how she decorated her apartment. “It’s all second-hand,” she said. I couldn’t believe it. The truth is a lot of things sold at the op shop are in new or almost new condition. That’s when I made the decision to only buy second-hand things.Selling second-hand things isn’t anything new butwhat the planet needs is more buyers. There is so much excess (过量) production in the world. So stop feeling ashamed, and let’s get shopping.4. What kind of feeling is expressed in Paragraph 1?A. Pride.B. Embarrassment.C. Delight.D. Sympathy.5. Whatare many people in the author’s community like?A. They are probably materialistic.B. They care about the environment.C. They think highly of op shopping.D. They look down upon immigrants.6. What was the author encouraged to do after visiting her friend’s apartment?A. Watch the documentaryThe True Cost.B. Donate more to local charities.C. Avoid shopping too much.D. Stop buying new things.7. What’s the purpose of the text?A. To entertain.B. To advertise.C. To persuade.D. To describe.CPaper is one of our oldest, simplest and most important inventions. But it also presents a danger to the world in two important ways. First, the making of paper requires the loss of many millions of trees each year. And worldwide use of paper is expected to double in the next 40 years. Clearly, the planet cannot stand such a high rate of forest loss. The second great problem with paper is what happens once it is no longer useful. A large amount of wastepaper ends up in landfills, where it can produce harmful gases and finally contribute to global climate change.One simple solution can greatly reduce both of these problems: paper recycling. Instead of cutting down trees, recycle existing paper to feed the paper-making process.Paper is mainly made from cellulose (纤维素)，which can be used repeatedly in papermaking. Unfortunately, it also means that paper waste takes a surprisingly long time to break down in landfills. So far, trees are the only source(来源) of cellulose that can fill the great demand for paper products. Therefore, recycling paper is simply one of the best ways to save trees. Thanks to advances in processing, recycled paper need not be the dark-color1 edstuff many of us are familiar with. It now can offer the same print performance as non-recycled paper.Effective recycling requires a continuous effort from everyone at all levels of society. The way to begin is with education and understanding. Once enough people realize the need for recycling, more effective recycling systems can be developed.The need is real. The massive loss of trees affects everybody on earth. Everyone should do their part to recycle paper and encourage government and industry to do the same. The world will be a better place for it!8. What can we infer from the text?A. The use of recycled paper will double in 40 years.B. Recycling paper helps relieve global climate change.C. Wastepaper can easily break down in landfills.D. There are not enough landfills for wastepaper.9. What makes recycled paper more acceptable?A. The great demand of trees.B. The low processing cost.C. Its dark-color1 ed feature.D. Its improved print performance.10. What does the author propose?A. Punishing the act of cutting trees.B. Recycling paper.C. Improving recycling system.D. Promoting paper industry.11. How is the text mainly developed?A. By analyzing causes and effects.B. By offering research plans and data.C. By discussing problems and solutions.D. By comparing strengths and weaknesses.DBlood donations save lives. But blood can only be stored under refrigeration (冷藏) for up to six weeks. After that, it’s no longer usable for transfusions(输血).“Because of that limitation, people have to continually donate blood to meet the needs. But also, in places where refrigeration may not be available, that can also bea challenge. It’s difficult to have blood available when needed.”UniversityofLouisvillebioengineer Jonathan Kopechek says. He also says disruptions to regular blood donations due to COVID-19 have put stress on the blood supply, and COVID-19 strengthens the need for more reliable long-term storage methods.But it’s pretty rare because of all the challenges and complexities with that process. Instead Kopechek’s team has developed a method of preserving blood so it can be stored in a dehydrated(脱水的) state at room temperature. To do so, they turned to an unusual preservative(防腐剂): a sugar called trehalose, which is a common ingredient(成分) in donuts（甜甜圈）to help make them look fresh even when they might be months old, and people wouldn’t know the difference.At that point, the blood could be dried and made into a powder(粉末). And then we can rehydrate(再水化) the blood and have it return back to normal. The team is still trying to improve yields but thinks the dried blood could be stored at room temperature for years. Kopechek says the technique could be ready for clinical trials in three to five years. If successful, itcould be used to create stores of dried blood in case of future pandemics or natural disasters, and for first aid work, military operations or even missions to Mars. Maybe first aid kits on theRed Planet will include dried red blood cells.12. Why we need a more reliable method to preserve blood?A. Refrigeration can’t be afforded.B. The cost to store blood is very high.C. People can’t donate their blood for COVID-19.D. Blood can only be stored under refrigeration for a short time.13. What makes the food or blood look fresh?A. Trehalose.B. Donuts.C. Powder.D. The new technique.14. What can we know about the technique?A. It is successful now.B. It has been put into use.C. It will be widely used.D. It has been researched for 3 to 4 years.15. What is the text mainly about?A. How to store blood.B. Shortage of refrigeration .C. A new technique of storing blood.D. A new technique used in many fields.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2024届广东省佛山市顺德区高三下学期高考五模物理核心考点试题(基础必刷)
2024届广东省佛山市顺德区高三下学期高考五模物理核心考点试题（基础必刷）一、单项选择题（本题包含8小题，每小题4分，共32分。
在每小题给出的四个选项中，只有一项是符合题目要求的）(共8题)第(1)题关于下列四幅图的说法正确的是（ ）A．图甲是粒子散射实验，卢瑟福据此提出了原子的核式结构模型B．图乙是光电效应实验，张开的验电器指针和锌板都带负电C．图丙是放射源放出三种射线在磁场中的运动轨迹，1为射线D．图丁是核反应堆示意图，它是利用轻核聚变反应释放能量第(2)题如图所示，电源电动势E=12V，内阻，，直流电动机内阻，当闭合S和S1，断开S2时，调节滑动变阻器R1为某值时，可使电源输出功率最大，闭合S，S2，断开S1，调节R2为某值时，可使电源的输出功率最大，且此时电动机刚好正常工作（电动机额定输出功率P0=4.5W），则下列判断正确的是（ ）A．电动机额定电流I=2AB．电动机两端电压为C．满足题意的R1，R2值分别为，D．满足题意的R1，R2值分别为，第(3)题北斗问天，国之夙愿。
我国北斗三号系统的收官之星是地球静止轨道卫星，其轨道半径约地球半径的7倍，则该卫星（ ）A．发射速度可能大于11.2km/sB．线速度小于7.9km/sC ．周期约为hD．可以经过曾母暗沙区域的上空第(4)题目前，我国处于空间站任务的关键技术验证阶段，将正式进入空间站建造阶段。
预计2022年底转入空间站运营阶段，航天员轮换期间将会最多有6名航天员同时在轨。
空间站核心舱绕地球运行的轨道可视为圆轨道，轨道离地面的高度约为地球半径的（低于同步卫星轨道高度）。
下列说法正确的是（ ）A．核心舱在轨道上运行的速度大于7.9km/sB．核心舱在轨道上运行的周期小于24hC．核心舱进入轨道后运行的加速度小于月球绕地球运行时的加速度D．后续加挂实验舱后，由于空间站质量增大，其轨道半径将变小第(5)题如图所示，在直角坐标系xOy中，位于坐标原点O的振源振动产生沿x轴正向传播的简谐横波，振幅为A，M、N为x轴上相距d的两质点。
2024届广东省佛山市顺德区高三下学期高考五模物理核心考点试题(基础必刷)
2024届广东省佛山市顺德区高三下学期高考五模物理核心考点试题（基础必刷）学校：_______ 班级：__________姓名：_______ 考号：__________（满分：100分时间：75分钟）总分栏题号一二三四五六七总分得分评卷人得分一、单项选择题（本题包含8小题，每小题4分，共32分。
在每小题给出的四个选项中，只有一项是符合题目要求的）(共8题)第(1)题一台小型发电机与交流电压表、小灯泡按图甲所示连接，发电机产生的电动势随时间变化的规律如图乙所示，发电机内阻不可忽略，交流电压表视为理想电压表。
则（ ）A．发电机产生的交变电流的电动势的最大值为440VB．交流电压表V的示数为220VC．发电机产生的交变电流的电动势表达式为D．任意时刻穿过线圈的磁通量为第(2)题我国航天人发扬“两弹一星”精神砥砺前行，从“东方红一号”到“北斗”不断创造奇迹。
“北斗”第49颗卫星的发射迈出组网的关键一步。
该卫星绕地球做圆周运动，运动周期与地球自转周期相同，轨道平面与地球赤道平面成一定夹角。
该卫星（ ）A．运动速度大于第一宇宙速度B．轨道半径大于“静止”在赤道上空的同步卫星C．地面某些地方的人将看到此卫星在其正上方“静止”D．该卫星仍处于完全失重状态第(3)题如图所示，整个空间中存在方向垂直导轨平面向里的匀强磁场B，导轨间距为l且足够长，左端接阻值为R的定值电阻，导轨电阻不计，现有一长为2l的金属棒垂直放在导轨上，在金属棒以O点为轴沿顺时针方向以恒定角速度ω转过60°的过程中（金属棒始终与导轨接触良好，电阻不计）（ ）A．通过定值电阻的电流方向由b到a B．转动过程中棒两端的电动势大小不变C．通过定值电阻的最大电流为D．通过定值电阻的电荷量为第(4)题在下列几种情景中，对情景的分析和判断正确的是（ ）A．点火后即将升空的火箭，因火箭还没运动，所以加速度一定为零B．高速公路上沿直线高速行驶的轿车为避免事故紧急刹车，因轿车紧急刹车时速度变化很快，所以加速度很大C．高速行驶的磁悬浮列车，因速度很大，所以加速度也一定很大D．太空中的“天宫一号”绕地球匀速转动，其加速度为零第(5)题地铁靠站时列车车体和屏蔽门之间安装有光电传感器。
2024届广东省佛山市顺德区高三下学期高考五模物理核心考点试题
2024届广东省佛山市顺德区高三下学期高考五模物理核心考点试题一、单项选择题：本题共8小题，每小题3分，共24分，在每小题给出的答案中，只有一个符合题目要求。
(共8题)第(1)题如图为人造地球卫星轨道的示意图，则卫星（）A．在a轨道运行的周期为24 hB．在b轨道运行的速度始终不变C．在c轨道运行的速度大小始终不变D．在c轨道运行时受到的地球引力大小是变化的第(2)题如图所示，运动会上，小红同学举着面积为0.5m2的班牌站在班级前。
假设风垂直吹到班牌后，速度立即减为0，当班牌所承受垂直牌面的风力为20N时，小红就不能使班牌保持竖直不动状态。
空气密度为1.2kg/m3，若班牌始终保持竖直不动，则垂直牌面方向的风速最大值约为（）A．8m/s B．6m/s C．4m/s D．2m/s第(3)题2022年10月9日，我国综合性太阳探测卫星“夸父一号”成功发射，实现了对太阳探测的跨越式突破。
“夸父一号”卫星绕地球做匀速圆周运动，距地面高度约为720km，运行一圈所用时间约为100分钟。
如图所示，为了随时跟踪和观测太阳的活动，“夸父一号”在随地球绕太阳公转的过程中，需要其轨道平面始终与太阳保持固定的取向，使太阳光能照射到“夸父一号”。
下列说法正确的是（ ）A．“夸父一号”绕地球做圆周运动的速度大于7.9km/sB．“夸父一号”绕地球做圆周运动的向心加速度大于地球表面的重力加速度C．给出万有引力常量和地球半径再结合题干信息，可以估算出地球的质量D．由题干信息，根据开普勒第三定律，可求出日地间平均距离第(4)题发现电流磁效应的物理学家是（）A．法拉第B．奥斯特C．库仑D．安培第(5)题如图，一定质量的理想气体，由a经过ab过程到达状态b或者经过ac过程到达状态c．设气体在状态b和状态c的温度分别为T b和T c，在过程ab和ac中吸收的热量分别为Q ab和Q ac．则．A．T b＞T c，Q ab＞Q ac B．T b＞T c，Q ab＜Q acC．T b=T c，Q ab＞Q ac D．T b=T c，Q ab＜Q ac第(6)题A、B两艘快艇在湖面上做匀速圆周运动（如图），在相同时间内，它们通过的路程之比是，运动方向改变的角度之比是，则它们（ ）A．线速度大小之比为B．角速度大小之比为C．圆周运动的半径之比为D．向心加速度大小之比为第(7)题奥运会比赛项目撑杆跳高如图所示，下列说法不正确的是（）A．加速助跑过程中，运动员的动能增加B．起跳上升过程中，杆的弹性势能一直增加C．起跳上升过程中，运动员的重力势能增加D．越过横杆后下落过程中，运动员的重力势能减少动能增加第(8)题将一个物体以某一速度从地面竖直向上抛出，设物体在运动过程中所受空气阻力大小不变，则物体A．刚抛出时的速度最大B．在最高点的加速度为零C．上升时间大于下落时间D．上升时的加速度等于下落时的加速度二、多项选择题：本题共4小题，每小题4分，共16分。
2024届广东省佛山市顺德区高三下学期高考五模高效提分物理试题(基础必刷)
2024届广东省佛山市顺德区高三下学期高考五模高效提分物理试题（基础必刷）学校：_______ 班级：__________姓名：_______ 考号：__________（满分：100分时间：75分钟）总分栏题号一二三四五六七总分得分评卷人得分一、单项选择题（本题包含8小题，每小题4分，共32分。
在每小题给出的四个选项中，只有一项是符合题目要求的）(共8题)第(1)题北方农村秋冬季节常用金属丝网围成圆柱形粮仓储存玉米棒，该粮仓由于玉米棒装的不匀称而发生倾斜现象，为避免倾倒，在左侧用木棍支撑，如图所示。
若支撑点距水平地面的高度为m，木棍与水平地面动摩擦因数为，木棍重力不计，粮仓对木棍的作用力沿木棍方向，最大静摩擦力等于滑动摩擦力，为使木棍下端一定不发生侧滑，则木棍的长度最多为（ ）A．1.5m B．m C．2m D．2m第(2)题在x轴上A、B两点处分别有点电荷Q1和Q2，A、B之间连线上各点的电势如图所示，取无穷远处电势为零，从图中可以看出（ ）A．Q1和Q2是异种电荷B．Q2的电荷量大于Q1的电荷量C．P点的电场强度为零D．负电荷从P1点移动到P点，电势能减小第(3)题擦玻璃机器人可以帮助人们解决高层和户外擦玻璃难的问题。
如图甲所示，一栋大厦表面均为玻璃材料，机器人牵引擦子（未画出）清洁玻璃时，将大厦某一表面简化为如图乙所示的正三角形ABC，与水平面夹角为。
已知机器人对擦子的牵引力平行于玻璃表面，擦子质量为m，与玻璃间的动摩擦因数为，重力加速度为g。
则机器人在该表面由B点匀速运动到AC中点D的过程中，擦子所受的牵引力为（）A．B．C．D．第(4)题如图两根轻弹簧AC和BD，它们的劲度系数分别为k1和k2，它们的C、D端分别固定在质量为m的物体上，A、B端分别固定在支架和正下方地面上，当物体m静止时，上方的弹簧处于原长；若将物体的质量变为3m，仍在弹簧的弹性限度内，当物体再次静止时，其相对第一次静止时位置下降了（）A．B．C．D．第(5)题下列关于重力的说法正确的是（）A．重力的方向不一定竖直向下B．重力是由于物体受到地球的吸引而产生的C．所有物体的重心都在物体上D．只有静止的物体才受到重力第(6)题关于功和功率下列说法正确的是（）A．功是矢量，功率是标量B．公式P=FV中P是发动机功率，F是合外力C．做功越多的机器，功率一定越大D．功率是描述做功快慢的物理量第(7)题如图为一个质点做直线运动的图象，该质点在前4s内向西运动，则该质点A．在8s末速度反向B．在4~12s内的位移大小为24mC．在前8s内的合外力的方向先向西后向东D．在前8s内的加速度大小不变，方向始终向东第(8)题如图所示，在同一竖直平面内，倾角的斜滑道与水平滑道平滑衔接，可视为质点的运动员踩着滑雪板从A点以速度沿水平方向飞出，恰好落到B处后顺势屈腿缓冲，他垂直于水平面的分速度迅速减小为零，滑雪板和水平面间的动摩擦因数为，不计空气阻力，，，g取10，则运动员在空中飞行的时间和在水平长直滑道上运动的最大距离分别为（ ）A．3s；500m B．3s；1000m C．6s；500m D．6s；1000m评卷人得分二、多项选择题（本题包含4小题，每小题4分，共16分。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
2019—2020广东顺德桂洲中学高考选择题专题训练第五套基础理论第三部分——电解质溶液
第五套基础理论第三部分——电解质溶液
一．选择题(此题包括9小题，每题3分，共27分。
每题只有一个
．．．．选项符合题意)
1. 将20mL0.4mol·L-1硝酸铵溶液跟50mL0.1mol·L-1氢氧化钡溶液混合，那么混合溶液中各离子浓度的大小顺序是( )
A．[NO3- ]>[OH一]>[NH4+]>[Ba2+] B．[NO3- ]>[Ba2+]>[OH一]>[NH4+]
C．[Ba2+]>[ NO3-]>[OH一]>[ NH4+] D．[NO3- ]>[ Ba2+]>[ NH4+]>[OH一]
2. 室温下，在pH=12的某溶液中，由水电离的[0H一]为( )
A．1.0×10-7mol·L-1 B．1.0×10-6mol·L-1
C．1.0×10-2mol·L-1D．1.0×10-12mol·L-1
3. 甲酸和乙酸差不多上弱酸，当它们的浓度均为0.10mol/L时，甲酸中的c(H+)约为乙酸中c(H+)的3倍。
现有两种浓度不等的甲酸溶液a和b，以及0.10mol/L的乙酸，经测定它们的pH从大到小依次为a、乙酸、b。
由此可知
A、a的浓度必小于乙酸的浓度
B、a的浓度必大于乙酸的浓度
C、b的浓度必小于乙酸的浓度
D、b的浓度必大于乙酸的浓度
4. 在0.1mol·L-1CH3COOH溶液中存在如下电离平稳：CH3COOH=CH3COO-+H+关于该平稳，以下表达正确的选项是
A.加入水时，平稳向逆反应方向移动
B.0加入少量NaOH固体，平稳向正反应方向移动
C.加入少量0.1mol·L-1HCl溶液，溶液中c(H+)
D.加入少量CH3COONa固体，平稳向正反应方向移动
5. 向三份0.1mol/LCH3COONa溶液中分不加入少量NH4NO3、Na2SO3、FeCl3固体〔忽略溶液体积变化〕，那么CH3COO—浓度的变化依次为
A、减小、增大、减小
B、增大、减小、减小
C、减小、增大、增大
D、增大、减小、增大
6. 取浓度相等的NaOH和HCl溶液，以3∶2体积比相混和，所得溶液的PH等于12，那
么原溶液的浓度为
A.0.01mol/L
B. 0.017mol/L
C. 0.05mol/L
D. 0.50mol/L
7.对室温下pH相同、体积相同的醋酸和盐酸两种溶液分不采取以下措施，有关表达正确
的选项是
A．加适量的醋酸钠晶体后，两溶液的pH均增大
B．使温度都升高20℃后，两溶液的pH均不变
C．加水稀释2倍后，两溶液的pH均减小
D．加足量的锌充分反应后，两溶液中产生的氢气一样多
8.某酸HX稀溶液和某碱YOH稀溶液的物质的量浓度相等，两溶液混合后，溶液的pH大于7，
下表判定合理的是
A．①③B．②③C．①④D．②④
二、选择题〔此题包括9小题，每题4分，共36分。
每题有一个或两个选项符合题意。
假设正确答案包括两个选项，只选一个且正确得2分，但只要选错一个，该小题为0分〕
9.以下溶液中有关物质的量浓度关系正确的选项是
A．pH=2的HA溶液与pH=12的MOH溶液任意比混合：
c(H+) + c(M+) == c(OH-) + c(A-)
B．pH相等的CH3COONa、NaOH和Na2CO3三种溶液：
c(NaOH)＜c(CH3COONa)＜c(Na2CO3)
C．物质的量浓度相等CH3COOH和CH3COONa溶液等体积混合：
c(CH3COO-) +2c(OH-) == 2c(H+) + c(CH3COOH)
D．0.1mol·L-1的NaHA溶液，其pH=4：c(HA-)＞c(H+)＞c(H2A)＞c(A2-)
)=0.8 10. 由硫酸钾、硫酸铝和硫酸组成的混合溶液，其PH=1,c(Al3+)=0.4 mol·L-1,c(SO 2
4
mol·L-1,,那么c(K+)为
A. 0.15 mol·L-1
B.0.2 mol·L-1
C. 0.3 mol·L-1
D.0.4 mol·L-1
11. 以下关于电解质溶液的表达正确的选项是
A 常温下，pH ＝7的NH 4Cl 与氨水的混合溶液中离子浓度大小顺序为
c(Cl －)＞c(NH 4＋)＞c(H ＋)＞c(OH －
)
B 将pH ＝4的醋酸溶液稀释后，溶液中所有离子的浓度均降低
C 中和pH 与体积均相同的盐酸和醋酸溶液，消耗NaOH 的物质的量相同
D 常温下，同浓度的Na 2S 与NaHS 溶液相比，Na 2S 溶液为pH 大
12.常温时，向pH =2的硫酸中加入等体积的以下溶液后，滴入甲基橙试液，显现红色，该溶液可能是
A.pH =12 的Ba(OH)2
B.pH =12的氨水
C.0.005mol/L NaOH
D.0.05mol/LBaCl 2
13. 以下溶液中有关物质的量浓度关系正确的选项是〔 〕
A ．pH=2的HA 溶液与pH=12的MOH 溶液任意比混合：
c (H +) + c (M +) == c (OH -) + c (A -)
B ．pH 相等的CH 3COONa 、NaOH 和Na 2CO 3三种溶液：
c (NaOH)＜c (CH 3COONa)＜c (Na 2CO 3)
C ．物质的量浓度相等CH 3COOH 和CH 3COONa 溶液等体积混合：
c (CH 3COO -) +2c (OH -) == 2c (H +) + c (CH 3COOH)
D ．0.1mol ·L -1的NaHA 溶液，其pH=4：c (HA -)＞c (H +)＞c (H 2A)＞c (A 2-)
14. 实验室现有3种酸碱指示剂，基PH 变色范畴如下甲基橙：3.1~4.4 石蕊：5.0~8.0 酚酞：8.2~10.0用0.1000mol/L NaOH 溶液滴定未知浓度的CH 3COOH 溶液，反应恰好完全时，以下表达中正确的选项是
A.溶液呈中性，可选用甲基橙或酚酞作指示剂
B.溶液呈中性，只能选用石蕊作指示剂
C.溶液呈碱性，可选用甲基橙或酚酞作指示剂
D.溶液呈碱性，只能选用酚酞作指示剂
15. 以下表达正确的选项是
A.将稀氨水逐滴加入稀硫酸中，当溶液pH=7时，c(SO 42－>c(NH 4＋)
B.两种醋酸溶液的物质的量浓度分不c 1和c 2，pH 分不为a 和a+1，那么c 1=10c 2
C .pH=11的NaOH 溶液与pH=3的醋酸溶液等体积混合，滴入石蕊溶液呈红色 D.向0.1mol/L 的氨水中加入少量硫酸铵固体，那么溶液中-32c(OH )c(NH H O)
增大
16.室温下，以下溶液等体积混合后，所得溶液的pH一定大于7的是
A 0.1mol/L的盐酸和0.1mol/L的氢氧化钠溶液
B 0.1mol/L的盐酸和0.1mol/L的氢氧化钡溶液
C pH＝4的醋酸溶液和pH＝10的氢氧化钠溶液
D pH＝4的盐酸和pH＝l0的氨水
17. 把三氯化铁溶液蒸干灼烧，最后得到的固体产物是
A．无水三氯化铁B．氢氧化铁C．氧化亚铁D．三氧化二铁
18. 由一价离子组成的四种盐溶液：AC、BD、AD、BC，浓度均为O.1 mol·L-1。
在室温下，前两种溶液的pH=7，第三种溶液的pH>7，最后一种溶液的pH<7。
以下各组酸、碱性比较正确的选项是( )。