深圳大鹏华侨中学2020年期中单元测试
2020届深圳市大鹏华侨中学高三英语下学期期中试卷及参考答案
2020届深圳市大鹏华侨中学高三英语下学期期中试卷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AThe OrchardI had a very nice meal at the Orchard restaurant．The food was lovely and the service was quite good．We chose to eat in the garden which was full of beautiful flowers and very relaxing．The only disappointment was the dessert — the apple piewas far too sweet and it was cold too．Apart from that it was an enjoyable evening．As for the price — what a bargain，excellent value for money！Park InnThe best thing about Park Inn was the service — it was excellent．There was a warm welcome when we arrived and the waiters were very helpful all evening．However，the food wasn’t as good．The menu looked interesting but the meals were rather tasteless．It’s not a cheap restaurant and I wasn’t happy to pay so much for boring food．Richard’s PlaceWhen we enteredthe restaurant，we were surprised by the lovely interior (内部的) design of it．So stylish，so modern！This is one of the most popular restaurants in town and it’s very easy to see why．The food was great and excellent value for money but it was ruined by very，very poor service！TheRiversideIt was lovely sitting outside and looking over the river．There were lots of little lanterns (灯笼) and color1 ed lights everywhere and it all looked very pretty．The food was good，nothing very special but quite tasty．The service was OK; we didn’t have to wait too long for our food but the waiter never looked very happy！It’s quite an expensive place but with the view I think it’s quite good value for money．1. In which restaurant can customers eat in the garden？A. Park Inn．B. TheOrchard．C. The Riverside．D. Richard’s Place．2. What makes the customers of Park Inn most satisfied？A. The food．B. The price．C. The service．D. The environment．3. In Richard’s Place，customers can ________．A. receive good serviceB. enjoy its moderndesignC. listen to wonderful musicD. enjoy the beauty of a riverBOnce a rich and clever boy had practically everything a boy could want, so he was not interested in most toys. But he couldn't get a very old mirror, and heconvinced his parents to buy it from mysterious（神秘的）old man. When the mirror arrived home, the boy went to see his reflection in it. His face looked very sad indeed. He tried smiling and making funny faces, but his reflection continued with its sad expression. "What a terrible mirror! It's the first time I've seen a mirror that didn't work properly!" the boy jumped violently.That same afternoon he went into the street to play and bought a few toys, but on his way to the park he saw a little girl who was crying her heart out. The girl was crying so much and looked so lonely that the rich boy went over to help her and to see what had happened. The little girl told him that she had lost her parents.Together the two set off in search of the parents. As the little girl wouldn't stop crying, the boy spent his money buying her sweets to cheer her up. Finally, after much walking, they found her parents who were much worried and were looking for her everywhere.The rich boy said goodbye to them. As it was getting late, he decided to head for home, without being able to play. At home, he went to his room, and noticed a shining light in the corner, the same corner he had left the mirror in. Seeing this, he went over to the mirror, and realised that the light was coming from his own body, so radiant（闪亮的）with happiness he had become.And so he understood the mystery of that mirror, the only mirror which could faithfully reflect the true joy of its owner. He realised it was true. He felt very happy at having helped that little girl. And since then, each morning when he looked in that mirror and failed to see a special shine, he knew what he had to do to bring it back.4. How did the boy feel when he first looked into the mirror?A. Embarrassed.B. Angry.C. Worried.D. Delighted.5. Why was the little girl crying so hard?A. She couldn't find her parents.B. She couldn't get the mysterious mirror.C. Her parents couldn't buy toys for her.D. The boy refused to give his toys to her.6. What could the boy see in the mirror after he went back from the park?A. A shining toy.B. A broken mirror.C. His happy face.D. The lovely girl.7. What is the purpose of this text?A. To tell us a horrible story.B. To introduce to us a strange mirror.C. To warn us not to be selfish.D. To encourage us to help others.CEveryone can be angry. But if you take the time to actually examine your anger instead of just “feeling” angry, you’ll have a better understanding of yourself. Knowing why you feel so angry can provide you with some surprising answers. These answers can enable you to suddenly grow spiritually and mentally.I can give you a personal example. I went to a meeting once and I was verbally attacked over an application I supported at my workplace. Various people went on and on about how terrible this system was and that it never worked. That didn’t bother me that much. I was used to that but one of the comments that was said was, “Your job is pointless.” This really upset meand at the time, I was ly furious(发怒地) with that comment.I was so angry and upset that they would treat me that way. Once I took the time to think about what was really making me so mad. I learned a lot. I realized that the comment was more truethan I wanted to admit. In the big scheme of things, my job was pointless. It wasn’t what I really wanted to be doing with my life and this was what frustrated me the most. Here I was pouring part of my heart and soul into a job I didn’t even really want to do. I was using it as a crutch(拐杖) because I didn’t have the confidence in myself to take the scary road towards what I really wanted to do. As soon as I realized that, a lot of my anger just melted away. I also realized that I needed to start focusing on what I really wanted to do.I now consider this incident as a great gift It got me back on track to moving in the direction I wanted to go with my life. I probably wouldn’t be where I am today if I hadn’t taken the time to figure out why I was really so angry.8. What made the author angry at the meeting?A. The system of the company was terrible.B. Someone said his job is insignificant.C. The policy of the company didn’t work.D. The application he supported was of no effect.9. What brought down the anger of the author?A. The apology someone made at the meeting.B. The crutch he used to take the scary road.C. His awareness of the fact that the comment was true.D. The courage he had to overcome the challenges.10. Why did the author consider the incident as a gift?A. It brought him back on track to the goal.B. It helped him get promoted to a higher position.C. It helped him change his character since then.D. It provided him with confidence in his career.11. What can be the best title of the passage?A. How to Cope with Verbal Attack in a CompanyB. Avoid Being Pointless at WorkC. Anger Is Harmful to HealthD. Understanding Yourself Better Through AngerDVolunteer DayWhat better way is there to enjoy your own hobbies while helping others at the same time? Come to Volunteer Day and choose which activity you’d like to join for the day. See below for a schedule of events on Volunteer Day.Volunteer Day schedule:7:30am.: Meet at the Community (社区) Center for juice and bagels.8:00—8:30 a.m.: Choose which activity you’d like to help with for the day.8:30 a.m.: Board the bus to your activity site.9:00 a.m.—3:30 p.m.: Work as a volunteer.3:30 p.m.: Board the bus that will take you back to the Community Center.See below for a list of volunteer opportunities for Volunteer Day so you can begin thinking about which activity you might want to join.A list of volunteer activities:Paint houses: Do you enjoy making art? If so, this volunteer opportunity might be just right for you! Happy Homes is a local organization that provides home repairs for needy people in the form of painting. For elderly or physically disabled people who cannot do repairs to their homes, Happy Homes provides volunteer painters to repaint old homes; outside or in. Happy Homes also provides painters to create beautiful wall paintings inside schools or community centers.Plant flowers: Do you enjoy being outside in nature? City Parks Association has many great opportunities for people who love to be outdoors. Help plant flowers and bushes in city parks; help lay paths at Cave Springs Park, or help pick up rubbish around the river banks. These activities are very active, so remember to be prepared withplenty of drinking water!Read to children: Do you enjoy working with young children? Do you like books? Love and Learning is an organization that provides volunteers to help children with learning disabilities. Read books out loud to groups of children four to six years old, or read one-on-one with struggling readers seven to eight years old.Play with animals: Do you love animals? Lovely Friends is an organization that visits local animal shelters and provides volunteers to spend time with the animals while their cages are being cleaned. Play with puppies, snuggle with cats, or hand-feed rabbits.12. At what time do volunteers leave for their activity sites?A. 7:30 a.m..B. 8:00 a.m.C. 8:30 a.m.D. 9:00 a.m.13. An outdoor lover probably takes part in ______.A. Plant flowersB. Paint housesC. Read to childrenD. Play with animals14. What do Lovely Friends volunteers do?A. Read books to children.B. Spend time with animals.C. Help plant bushes in parks.D. Pick up garbage along the river.15. The purpose of the passage is to _________.A. educate childrenB. attract volunteersC. comfort the elderlyD. encourage the disabled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。
2020年深圳市大鹏华侨中学高三生物期中考试试卷及参考答案
2020年深圳市大鹏华侨中学高三生物期中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. 甲、乙两种物质分别以自由扩散和协助扩散方式进入细胞，如果以人工合成的无蛋白磷脂双分子膜代替细胞膜，并维持其他条件不变，则（）A.甲物质的运输被促进B.乙物质的运输被促进C.甲物质的运输被抑制D.乙物质的运输被抑制2. 下列有关生命系统的叙述正确的是（）A.流感病毒不是生命系统的结构层次，所以不具有生命特征B.细胞是能够完整表现生命活动的最基本的生命系统C.所有生物个体都具备由功能相关的器官组成的系统层次D.蛋白质和核酸等大分子可算作系统，也属于生命系统的层次3. A TP、GTP、CTP和UTP是细胞内四种高能磷酸化合物，它们的结构只是碱基的不同，下列叙述错误的是（）A.A TP的合成常伴随着细胞内的放能反应B.1分子GTP彻底水解可得到3种小分子物质C.CTP中“C”是由胞嘧啶和脱氧核糖构成的D.UTP断裂两个特殊化学键后可作为合成RNA的原料4. 发菜细胞群体呈黑蓝色，状如发丝；生菜是一种绿色植物，两者分别因与“发财”和“生财”谐音而备受百姓青睐。
下列属于发菜和生菜的相同点的是（）A. 是真核生物B. 含有叶绿体C. 是自养生物D. 有核膜5. 下列有关蛋白质的功能的叙述不正确的是（）A. 有些蛋白质具有免疫功能B. 有些蛋白质能够调节机体的生命活动C. 有些蛋白质具有运输载体的功能D. 有些蛋白质是生物体能量的直接来源6. 一项来自康奈尔大学的研究揭示了体内蛋白分选转运装置的作用机制，即为了将细胞内的废物清除，细胞膜塑形蛋白会促进囊泡（分子垃圾袋）形成，将来自细胞区室表面旧的或受损的蛋白质带到了内部回收利用工厂，在那里将废物降解，使组件获得重新利用。
下列相关叙述，不正确的是（）A.细胞膜塑形蛋白是在核糖体中形成的B.“回收利用工厂”可能是溶酶体，“组件”可能是氨基酸C.“分子垃圾袋”的成分主要是磷脂和蛋白质D.人体细胞中内质网、高尔基体和核糖体可以形成囊泡7. 下图所示为真核细胞中遗传信息的传递和表达过程。
2020年深圳市大鹏华侨中学高三生物期中考试试题及参考答案
2020年深圳市大鹏华侨中学高三生物期中考试试题及参考答案一、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. 有着“植物大熊猫”和世界上最长寿树种美称、在地球上已有250万年历史的红豆杉，入选2010年世博会中国馆珍稀植物展出品种。
其体内含量最多的化学元素和有机物分别是（）A.C和水B.O和蛋白质C.O和水D.H和蛋白质2. 下列关于细胞共性的描述正确的是（）①均具有由脂双层与蛋白质构成的膜结构①A TP是细胞可直接利用的能源物质①遗传物质都是脱氧核糖核酸①所有生物的新陈代谢都是以细胞为基础进行的A.①①①①B.①①①C.①①①D.①①①3. 人体血糖浓度的相对稳定受多种因素影响。
现有甲、乙、丙三人，甲是健康的正常人，乙的胰岛B细胞被自身免疫反应所破坏，丙的胰岛B细胞功能正常但体内含有抗胰岛素受体的抗体。
甲在某次运动前后血糖浓度的变化如下图所示，下列叙述错误的是（）A.给丙个体注射胰岛素能够有效调节其血糖水平B.乙个体胰岛B细胞的葡萄糖受体可能被抗体破坏C.bc段血糖浓度下降的直接原因是运动初期血糖的消耗量大于产生量D.cd段血糖浓度升高主要是由于血液中胰高血糖素的增加引起的4. 下列物质或条件中，哪项是光合作用暗反应所必需的（）A.叶绿素B. A TPC.光D. O25. 尿崩症分两种：因抗利尿激素（ADH）的缺乏引起的中枢性尿崩症和因肾脏对ADH敏感性缺陷引起的肾性尿崩症。
临床上可通过对患者禁水加压（禁止饮水10h后补充ADH）后，测定其尿液渗透压的方法加以鉴别。
下列叙述错误的是（）A. 中枢性尿崩症患者肾小管和集合管的重吸收作用比正常人弱B. 肾性尿崩症患者体内抗利尿激素的含量比正常人偏高C. 禁水加压后，中枢性尿崩症患者的尿液渗透压将显著降低D. 禁水加压后，肾性尿崩症患者的尿液渗透压将无显著变化6. 幽门螺旋杆菌主要寄生于胃中，是引起很多消化道疾病的首要致病细菌。
2020年深圳市大鹏华侨中学高三生物上学期期中试卷及参考答案
2020年深圳市大鹏华侨中学高三生物上学期期中试卷及参考答案一、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. 脂质是细胞和生物体的重要组成成分，下列叙述错误的是（）A.磷脂是构成细胞膜的重要成分B.脂肪仅由C、H、O三种元素组成C.维生素D在人体内参与血液中脂质的运输D.性激素能促进人和动物生殖器官的发育2. 下列关于细胞癌变的叙述，正确的是（）A. 细胞内抑癌基因突变为原癌基因B. 细胞核膜内折，染色质收缩C. 细胞膜表面糖蛋白增多D 细胞形态结构发生改变3. 田间种植的三倍体香蕉某一性状发生了变异，其变异来源通常不可能来自( )A.基因重组B.基因突变C.染色体变异D.环境变化4. 下列关于生命系统结构层次的叙述，不正确的是（）A.一个大肠杆菌既可对应细胞层次，又可对应个体层次B.细胞核和细胞器都有双层膜，是最小层次的生命系统C.从生命系统结构层次的角度理解，人体的结构层次为细胞、组织、器官、系统、个体D.并非所有生物都具有生命系统的各个层次，如植物没有“系统”这一结构层次5. 下列有关蛋白质的叙述，错误的是（）A.蛋白质中的N元素主要存在于肽键中B. DNA的多样性导致蛋白质的多样性C.蛋白质空间结构被破坏后仍能与双缩脲试剂发生反应D.蛋白质结构多样性与构成蛋白质的氨基酸的种类、数目和空间结构有关6. 在小白兔细胞中，具有双层膜结构的是A. 线粒体B. 叶绿体和线粒体C. 高尔基体和叶绿体D. 线粒体和核膜7. 人体Na+缺乏会引起神经、肌肉细胞的兴奋性降低，最终引发肌肉酸痛、无力等。
这说明无机盐离子（）A. 对维持酸碱平衡有重要作用B. 对维持细胞形态有重要作用C. 对调节细胞内的渗透压有重要作用D. 对维持生物体的生命活动有重要作用8. 鸭喙有黑、黄、花三种颜色，受常染色体上A、a和B、b两对等位基因控制，其中A基因控制黑色素的合成，B基因可以使黑色素在整个喙部沉积。
2020届深圳市大鹏华侨中学高三生物期中考试试题及答案
2020届深圳市大鹏华侨中学高三生物期中考试试题及答案一、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. 下列植物细胞中，适合观察细胞有丝分裂的是（）A. 蚕豆叶肉细胞B. 洋葱鳞片叶表皮细胞C. 蚕豆根尖分生区细胞D. 洋葱根尖伸长区细胞2. 如图所示为在显微镜下对用家鸽肝脏制作的临时装片进行观察的结果。
下列叙述错误的是（）A.动植物细胞有丝分裂的明显区别在于细胞丙、戊所处的时期B.DNA复制所导致的染色体数目加倍发生在细胞乙所处的时期C.细胞甲中染色体形态固定数目清晰，便于观察染色体D.着丝点一分为二、姐妹染色单体分开发生在细胞丁中3. 在我国西部大开发的战略中，“保护天然林”和“退耕还林(草)”是两项重要内容，采取这两项措施的首要目标是()A.开展生态旅游B.发展畜牧业C.增加木材产量D.改善生态环境4. 下列关于“用高倍显微镜观察叶绿体和线粒体”实验的说法不正确的是（）A.健那绿染液是一种细胞染料，可用于观察活体线粒体B.在高倍显微镜下，可看到绿色、扁平的椭球形或球形的叶绿体C.可选择菠菜叶肉细胞同时观察线粒体和叶绿体D.水绵可直接放在载玻片上观察叶绿体5. 科学家证实：RNaseP酶由蛋白质和RNA组成，将这种酶中的蛋白质和RNA分开，在适宜条件下，RNA 仍然具有与这种酶相同的催化活性，而蛋白质不具有。
这一结果表明()A.酶都是由蛋白质和RNA组成的B.绝大多数酶是蛋白质，少数是RNAC.酶的基本组成单位是脱氧核糖核苷酸D. RNA具有催化作用6. 如图是低倍显微镜观察洋葱根尖细胞时某视野中的图像，若使用高倍镜观察细胞③，下列说法错误的是（）A.首先将装片适当向右移动把细胞③移到视野正中央B.从低倍镜转到高倍镜时，提升镜筒使高倍镜到位C.高倍镜下，显微镜视野变暗但细胞③图像变大D.换高倍镜后，通过改用凹面镜、大光圈将视野调亮7. 人的肌肉组织分为快肌纤维和慢肌纤维两种，快肌纤维几乎不含有线粒体，与短跑等剧烈运动有关；慢肌纤维与慢跑等有氧运动有关。
2020届深圳市大鹏华侨中学高三生物期中试卷及参考答案
2020届深圳市大鹏华侨中学高三生物期中试卷及参考答案一、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. 据报道，哈佛大学研究人员将一本大约有5．34万个单词的书籍编码进不到亿万分之一克的DNA微芯片中，然后成功利用DNA测序来阅读这本书。
这是迄今为止人类使用DNA遗传物质储存数据量最大的一次实验。
下列有关DNA的叙述正确的是（）A.DNA测序实际就是确定基因在DNA中的排列顺序B. 每个脱氧核糖上均连有一个磷酸和一个含氮碱基C. 不同个体的相同组织细胞中的核DNA是相同的D. 每个DNA分子中A+T的量不一定等于G+C的量2. 近年诞生的具有划时代意义的CRISPR/Cas9基因编辑技术可简单、准确地进行基因定点编辑。
其原理是由一条单链向导RNA引导核酸内切酶Cas9到一个特定的基因位点进行切割。
通过设计向导RNA中20个碱基的识别序列，可人为选择DNA上的目标位点进行切割（见下图）。
下列相关叙述错误的是（）A.Cas9蛋白由相应基因指导在核糖体中合成B. 向导RNA中的双链区遵循碱基配对原则C. 向导RNA可在逆转录酶催化下合成D. 若α链剪切点附近序列为……TCCAGAA TC……，则相应的识别序列为……UCCAGAAUC……3. 如图ac为细胞中的两种结构，b是它们共有的特征。
下列叙述正确的是( )A. 若b表示两层膜结构，则a.c只能是叶绿体和线粒体B. 若b表示细胞结构中含有的核酸，则a.c一定是叶绿体和线粒体C. 若b表示细胞器中含有色素，则a.c不可能是叶绿体和液泡D. 若b表示磷脂，a.c肯定不是核糖体和中心体4. 下列关于细胞的结构和生命活动的叙述，错误的是（）A. 溶菌酶能破坏酵母菌和乳酸菌的细胞壁B. 细胞的核膜、内质网膜和细胞膜中都含有磷元素C. 两个相邻细胞的细胞膜接触可实现细胞间的信息传递D. 高尔基体主要进行蛋白质的分拣和转运5. 如图甲表示某原核细胞中一个基因进行的某项生理活动，图乙是图甲中C部分的放大，若该基因中碱基T为m个，占全部碱基的比值为n。
2020年深圳市大鹏华侨中学高三英语下学期期中考试试卷及答案
2020年深圳市大鹏华侨中学高三英语下学期期中考试试卷及答案第一部分阅读（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ABest language learning appsDuolingoThe app doesn't restrict how many languages you can try to learn at the same time. I use Duolingo to practice Spanish and German. In the app, you can access resources such as Duolingo Stories, which can allow you to check your comprehension skills as you go. I also subscribe to Premium for $10 per month which includes an ad-free experience and downloadable lessons.MemriseOne of my favorite parts of Memrise is its short videos about how real locals express different phrases in conversation. A few lessons are available for free daily, but the full program is accessible if you subscribe to Memrise Pro. There are three plans—one month for $9, a year for $30 or three months for $19.BusuuWhen you sign up for Busuu, you select the language you want to learn, and the app helps you determine how advanced you are with it and why you want to learn it, and to what level. From there, you set a daily study goal. Premium costs about $6 per month for a year.LiricaIf you listen to any song enough, you'll learn all the words through repetition, even if they're in a different language. But how do you figure out what they mean? This is where Lirica comes in. This app is unique in how it approaches teaching Spanish. Instead of traditional teaching methods for learning a language, Lirica uses popular music by Latin artists to help you learn the Spanish language and grammar. Lirica has a one-week free trial and then it's about $4 per month.1. Which app is best for learning multiple languages at a time?A. Lirica.B. Busuu.C. Memrise.D. Duolingo.2. How much should you pay for a quarterly subscription to Memrise Pro?A. $9.B. $19.C. $28.D. $30.3. What is special about Lirica?A. It offers a one-month free trial.B. It helps users set a daily study goal.C. It hires Latin artists to teach Spanish.D. It enables users to learn Spanish through music.BWhen I was a boy, there was but one permanent ambition among my comrades in our village on the west bank of Mississippi River. That was, to be a steamboat man. We had temporary ambitions of other sorts, but they were only temporary.My father was a justice of the peace, and I supposed he possessed the power of life and death over all men and could hang anybody that offended him. This was distinction enough for me as a general thing；butthe desire to be a steamboat man kept intruding, nevertheless. One of our boys in town, who went away and was not heard of for-a long time, turned up as apprentice engineer on a steamboat. This thing shook the bottom out of all my Sunday—school teachings. That boy was notoriously worldly, and I was just the opposite. There was nothing generous about this fellow in his greatness. He would always manage to have a rusty nail to scrub while his boat stopped at our town, and he would sit on the inside guard and scrub it, where we could all see him. And wherever his boat was laid up he would come home and show off in the town in his blackest and greasiest clothes, so that nobody could help remembering that he was a steamboat man; and he used all sorts of steamboat technical terms in his talk, as if he were so used to them that he forgot common people could not understand them.This creature's career could produce but one result, and it was speedily followed. Boy after boy managed to get on the river. Despite many choices, pilot was the grandest position of all. The pilot, even in those days of trivial wages, had a princely salary—from 150—250 dollars a month, and no board payment.But our parents would not let us and our worry was the next year would find us hunting for jobs with low pay again. So by and by I ran away. I said I never would come home again till I was a pilot and could come in glory.4. Why does the writer mention his father's job in Paragraph 2?A. To show that his father was in power.B. To show that his father is cruel.C. To emphasize the job he prefers.D. To emphasize his love for his father.5. Which of the following can best conclude the writer's attitude toward the boy?A. He thought the boy was material but pitiful.B. He thought the boy was annoying but still envied him.C. He thought the boy was shallow but knowledgeable.D. He thought the boy was disrespectful but still liked him.6. Which of the following statements is Not True?A. The boy talked in a way to make others feel jealous.B. The boy's experience made other boys follow suit.C. The pilot's salary was ly high but without meals covered.D. The writer was ambitious to make his childhood dream come true.7. What rhetorical method does the underlined sentence have?A. Simile.B. Personification.C. Parallelism.D. Irony.CKenyan mother Beth Mwende heard her sleeping child cry out, but did not worry after the three-year-old quickly quietened down. The next morning, however, she found her daughter, Mercy, nearly unconscious with two bite marks in the neck. “I didn’t know that it was a snake,” Mwende said.Although snakebites are common in her hometown, antivenom medication is difficult to get. Mwende lives about 160 kilometers east of Nairobi, Kenya’s capital. So she took her daughter to a traditional healer. He placed stones over the bites. Mercy died within hours. She was one of about 700 Kenyans killed by snakebites each year, notes a report in the scientific publicationToxicon.The Kenya Snakebite Research and Intervention Center (KSRIC) is working to change that. The KSRIC hopes to have East Africa’s first antivenom medication on the market within five years. It estimates the cost will be about 30 percent of an imported product, which often sells for about US $ 30.More than 70, 000 people are bitten in East Africa each year. Climate change and deforestation are worsening the problem as snakes get pushed out of natural surroundings into populated areas.Nearly 100 snakes live at the research center in a forest near Nairobi. Researchers take venom from snakes and study it before injecting small amounts into other animals, such as sheep. The animals then create antibodies that can be made into antivenom.“Up to now, no one has made any kind of antivenom in Kenya,’’ said Geoffrey Maranga Kepha, a senior snake handler.Two effective antivenoms are available in Kenya, from India and Mexico, the center says.The center is teaching communities that using antivenom immediately after receiving a snakebite can save lives, said head researcher George Adinoh.“After seeing how people died in Kenya from snakebites I decided to devote my life to coming up with arescue measure that will help or prevent people from dying from snakebites,” snake handler Kepha added.8. How does the author introduce the topic of the text?A. By telling a story.B. By listing figures.C. By referririg to documents.D. By making a comparison.9. Why did Mwende take her daughter to a traditional healer?A. She couldn’t afford any modern treatment.B. She lived where antivenom medication is not available.C. The traditional way is very effective to treat snakebites.D. She believed a traditional healer could cure her daughter.10. What is causing more snakebites to happen in East Africa?A. Lack of antivenom medication.B. Environmental damage and climate change.C. People’s low awareness of the danger of snakes.D. People’s pursuit of traditional cures for snakebites.11. What do we know about antivenom in Kenya from the text?A. Itis taken from antibodies of sheep.B. There is only one effective antivenom available.C. KSRIC is trying to develop a local antivenom now.D. People refuse to use antivenom after being bitten by snakes.DScientists often compare coral reefs(珊瑚礁) to underwater rainforests, yet unlike the leafy plant base of a forest, corals are animals. The soft creatures are naturally half-transparent and get their brilliant color1 from algae(藻类) living inside them. When corals experience stress from hot temperatures or pollution, theyhaltthe interdependent relationship with algae, typically pushing them out and turning white. Corals are still alive when they are white, but they're at risk and many eventually die, turning dark brown.Scientists around the world are looking for means to protect and maybe increase corals. One common option is to create more protected areas — essentially national parks in the ocean. Beyond nature preserves, some conservationists are looking to more hands-on methods. One research center in the Florida Keys is exploring a form of natural selection to keep corals remaining. The reef system in the Keys has been hit hard by climate change and pollution, which is especially tough, because corals there help support fisheries worth $ 100 millionevery year.To keep the wild ecosystem alive, Erinn Muller, the center's director, and her team are harvesting samples of the corals that survived the environmental stress naturally, keeping them to make them reproduce, and then reattaching them to the reef. They have 46,000 corals on plastic frames under the sea. So far, the center has regrown over 70,000 corals from five different species on damaged reefs.In The Bahamas, Ross Cunning, a research biologist at Chicago's Shedd Aquarium, focuses on corals with genes that could make them natural candidates for restoration projects. He published a study of two Bahamian reefs, one that survived an extreme 2015 heat wave, and one that didn't. "We think their ability to deal with these higher temperatures is built into their genes," says Cunning. There's evidence of corals evolving more quickly to resist rapidly warming climate. The big question scientists need investigate, adds Gunning, is how much more heat corals can adapt to.12. What does the underlined word "halt" in the first paragraph mean?A. End.B. Develop.C. Strengthen.D. Weaken.13. What do Muller and her team do to save corals?A. Restore the damaged reefs.B. Grow corals by hand underwater.C. Create more protected areas.D. Move corals to unpolluted areas.14. What do Gunning's words suggest?A. Many corals have been genetically improved.B. Cooling down the waters is key to rescuing corals.C. Reasons for corals surviving heat waves are shocking.D. The highest temperature corals can survive is unclear.15. Which can be a suitable title for the text?A. Relationship between corals and algaeB. Efforts made to save coralsC. Impact of climate warming on coralsD. Survival crisis faced by coral reefs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。
2020年深圳市大鹏华侨中学高三语文下学期期中试卷及参考答案
2020年深圳市大鹏华侨中学高三语文下学期期中试卷及参考答案一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文字，完成下面小题。
一针一线皆关情蔡勋建①父亲常说“做出衣裳的是针线”，按说这没有什么创意，但从一名乡间职业裁缝口中说出，却有权威性和说服力。
父亲一生以裁缝为业，受乡亲敬重，行走乡间方圆二三十里，甚至跨出湘鄂边界为人缝制衣裳。
②他十二三岁拜师学裁缝，头年多半时间给师父家挑水打柴干家务活，渐渐地开始学缝扣眼、绞襻①子、钉扣子。
翌年学习缝制衣服，第三年开始学绗②棉做棉衣，最后学剪裁。
师父手艺高超，很严厉，连立身坐姿、穿针引线也有规矩，弄不好便举起尺子打过来。
父亲说，他没少挨师父训罚，怎样打罚都必须忍着，熬过了三年，便有出头之日了。
三年后他便提着裁剪刀行走乡里，独当一面，还真是多亏了师父的言传身教。
③在我的记忆深处，父亲有些绝活儿。
④父亲没学过美术绘图，可他裁布料用画粉时，总是从容果断，绝不拖泥带水。
画线时用的是画粉袋，一条纱线从装有画粉的小布袋里左贯右出，其原理与木匠的墨斗无异。
比如绗棉衣棉裤，父亲在铺好絮棉的布面上，左手捏着画粉袋口，将线头置于棉裤一端，右手拉粉线，再用右肘根压住粉线另一端，右手拇指食指拈起粉线，轻轻一弹，不偏不倚完成一条白线。
如此反复，他的徒弟再照线举针绗棉。
⑤父亲擅长做开襟衣衫，他最得意的是做得一手漂亮盘扣。
男服多用蜻蜒扣、春蚕扣(也叫一字扣)，女服多用蝴蝶扣、菊花扣，还有男女通用的琵琶扣、树枝扣。
一个个蜻蜓头，一对对蝴蝶结，公扣母扣，结对成双。
这种衣服全用布扣，杜绝塑料扣子或有机玻璃扣子，着实漂亮。
⑥父亲喜欢在左胸前袋口插上一支钢笔，不过这笔大抵在算账立据时才派上用场。
父亲有“两不记”：一是收人布料不记，客户来料，只要说明你要做什么衣服什么样式，他随手往那衣料堆里一放，绝不会张冠李戴；二是量体裁衣，他拿皮尺在来人身上左一拉右一扯，嘴里念叨着，只量体并不当面记录，也不开制衣单，顾客按期取衣，从不出错。
2020年深圳市大鹏华侨中学高三英语下学期期中考试试卷及参考答案
2020年深圳市大鹏华侨中学高三英语下学期期中考试试卷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AOur Teen Summer Spanish Program is two weeks of fun, educational excitement that helps students learn Spanish fast. Our Spanish summer program allows our students to learn from highly trained, certified teachers and be absorbed in the language and theculture of Costa Rica.Features include:* Intensive(强化的) daily Spanish classes* Extracurricular classes in dance, cooking, music, and handiwork* Outdoor activities including hiking, camping, rafting, and ziplining(高空滑索)* Homestay with a local Costa Rican family* Volunteer work in needy neighborhoodsOur Teaching Methods:We are proud to use TPRS---Total Physical Response Storytelling---in our curriculum. This innovative method uses strange and amusing stories to teach new vocabulary, increase fluency, and get students involved by giving them the opportunity to alter the details themselves. Because of the silliness, creativity, and repetition involved, TPRS allows students to learn easily and remember information effortlesslyMemorizing vocabulary and listening to lectures on grammar are slow, inefficient ways to learn a new language. The best way to truly learn and commit new material to memory is through conversation. In our Spanish classes, students can expect to speak up to 80% of each class. By speaking in the new language freely and consistently, students can see progress faster because they are using the new grammar and vocabulary that they have learned at the same time. This helps the brain remember the new words and grammar structures for future use, making it much easier to progress.1.What does the program do?A.It offers weekly Spanish classesB.It focuses more on outdoor activitiesC.It gives teachers a chance to receive trainingD.It provides activities about the Spanish culture2.What is the best way to learn a language according to the text?A.Memorizing a larger vocabularyB.Speaking more in the new language.C.Mastering more grammar structuresD.Writing stories to share with others3.What is the purpose of the text?A.To employexperienced Spanish teacherB.To hire foreign volunteers for a programC.To attract teen foreigners to a programD.To introduce language learning methodsBPaper is an important part of modern life. People use it in school, at work, to make artwork and books, to wrap presents and much more. Trees are the most common material for paper these days.So how do people make paper out of trees today? People first cut trees, load them onto trucks and bring them to a factory. Machines cut open the outer coverings of the trees, and cut the trees into pieces. Those pieces are boiled into a soup. After that, it is hit flat, dried and cut up into sheets of paper.The entire process, from planting a small tree to buying your school notebook, takes a very long time. Just growing the trees takes 10 to 20 years.Making tons of paper from trees can harm the planet. Humans cut down 80, 000 to 160,000 trees around the world every day, and use many of them to make paper. Some of those trees come from tree farms. But people also cut down forests for paper, which means that animals and birds lose their homes.Cutting forests down also contributes to climate change, and paper factories pollute the air. After you throw paper, it often takes the paper six to nine years to break down. That's why recycling is important. It saves a lot of trees, slows climate change and helps protect endangered animals, birds and all creatures that rely on forests for their homes and food.So if paper isn't good for the environment, why don't people write on something else?The answer: They do. With computers, tablets and cellphones, people use much less paper than in the past. Maybe a day will come when we won't use paper at all — or will save it for very special books and artworks.4. What can we know about making paper out of trees?A. It costs much money.B. It takes a lot of time.C. It is very easy and fast.D. It is dangerous and difficult.5. What is the impact of paper production?A. It promotes the recycling.B. It does harm to the environment.C. It slows down the climate change.D. It protects the animals from losing homes.6. How will we use paper someday in the future according to the text?A. Use it for books only.B. Use the recycled paper.C. Treasure it occasionally.D. Use it for artworks.7. What idea does the author want to express from the text?A. The influence of making paper on environment.B. The wonderful experience of making paper.C. The necessary process of making paper.D. The good reasons for making paper.CDogs are often called as “man's best friend”, MacKenzie, a four-pound Chihuahua（吉娃娃）, was named winner of the 2020 American Hero Dog Competition on October 19, 2020.In its tenth year in 2020 the annual contest is the brainchild of American Humane, the country's first national charitable organization founded for the safety and well-being of animals. Often called the “Oscars for dogs”, the award recognizes dogs who make extremely great contributions to society.The competition of 2020 attracted over 400 entries（参赛者）from across the country. These heroic dogs have gone above the call of duty, saving lives, comforting the ill and aged and reminding us of the powerful, age-old ties between animals and people. While all were impressive, it was tiny MacKenzie who wonthe judges' hearts.MacKenzie's growth was not easy. Born with a mouth disability, she had to be fed through a tube（管子）for the first year of her life. Despite her own struggles, she always seemed to think more of other animals in need. “Never have I seen such a will to live. Though sick, she carefully looked after the baby animals at the rescue（救助）center,” said her caretaker.A life-saving operation performed in 2014 gave MacKenzie the ability to eat independently. The seven-year-old chihuahua is now working for the Mia Foundation, an organization that rescues and nurses animals with inborn disabilities. The chihuahua does an excellent job and has raised various animals. She plays nurse,cleans, comforts and hugs them, acting as their mother and teaching them how to socialize, play and have good manners.In addition to her role as an animal caretaker, MacKenzie also visits schools to educate kids about the importance of accepting physical differences in both animals and people. Her heartwarming and inspiring story makes MacKenzie a worthy receiver ofAmerica's top dog honor.8. What can we infer about the American Hero Dog Competition?A. It was first held in 2010B. It was held to honor caretakers of dogs.C. It takes place every ten years.D. It was started by a charitable organization.9. With what quality did MacKenzie win the award?A. Talent and braveryB. Friendliness and care.C. Courage and selflessness.D. Confidence and independence.10. In which aspect can students benefit from MacKenzie's visits?A. Learning from failures.B. Understanding the disabled.C. Valuing physical health.D. Developing practical ability.11. What's the best title for the text?A. Dogs Are Man's Best Friends.B. Treat Dogs the Way We Want to Be Treated.C. Touching Stories between MacKenzie and PeopleD. 2020 American Hero Dog: A TinyChihuahua.DMark Twain,the famous American writer,was once traveling in France.He went by trainto Dijon.He was very tired and wanted to sleep.He therefore asked the conductor to wake him up when the train came to Dijon.But first he explained he was a very heavy sleeper,“I may possibly protest(抗议)loudly when you try to wake me up,” he said to the conductor.“But don’t take any notice of what I say.Just put me off the train anyway.”Then Mark Twain went to ter,when he woke up it was night time and the train had reached Paris already.He realized at once that the conductor had forgotten to wake him up at Dijon.He was so angry that he ran to the conductor and began to shout at him.“I have never been so angry in my life,” Mark Twain said.The conductor looked at him calmly(平静地).“You are not half so angry as the American whom I put off the train atDijon,” he said.12. Mark Twain knew that he was a heavy sleeper,so ________.A. he protested loudly to the conductorB. he did not sleep before he arrived inDijonC. he told the conductor to wake him up no matter how loudly he might protestD. he slept lightly that time13. The conductor didn’t wake up Mark Twain atDijonbecause ________.A. he didn’t take Mark Twain’s words seriouslyB. he forgot Mark Twain’s words when the train came toDijonC. he did not want to bear his protestD. he mistook another American traveler for Mark Twain14. The American whom the conductor put off the train ________.A. did not want to get off atDijonB. wanted to get off atParisC. wanted to get off atDijonD. did not want to get off atParis15. Which of the following is TRUE?A. The conductor didn’t take Mark Twain’s words seriously.B. The conductor did take Mark Twain’s words seriously.C. The conductor was a heavy sleeper.D. Mark Twain must get off atParis.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。
2020年深圳市大鹏华侨中学高三英语上学期期中试题及参考答案
2020年深圳市大鹏华侨中学高三英语上学期期中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AOlder adults who sleep six hours or fewer a night may have elevated risk for dementia(痴呆症) and other cognitive (认知的) issues, a new study finds.Researchers at Stanford University measured seniors' (ages 65 to 85) dementia risk and cognitive abilities, finding higher risk in those patients who regularly slept six or fewer hours compared to those who slept seven or eight hours. Those seniors who slept nine or more hours also had lower cognitive functions and other health issues, but the researchers didn't find the same high dementia risk in this group.The findings demonstrate how important it is for adults to maintain a healthy sleep cycle, especially as they get older.As adults age, it's common for their sleep patterns to change or becomedisrupted— leading to longer, shorter, or more irregular sleep. This disruption may be linked to Alzheimer's and other forms of dementia, impacting seniors' ability to remember information, problem-solve, and go through everyday behaviors. Sleep disruption can also be caused by or heighten depression, cardiovascular disease（冠心病）, and other conditions.A recommended sleep time for seniors is seven to eight hours, the researchers said. Six or fewer hours corresponded to short sleep, while nine or more hours corresponded to long sleep.The Stanford researchers measured levels of beta amyloid, a protein in the brain that is typically found in high levels when a patient develops Alzheimer's. In addition, the researchers used several tests for memory, attention, spatial skills, and executive function to identify patients' cognitive abilities. Those patients sleeping for six hours or fewer a night were more likely to develop dementia, the researchers found. The low-sleep patients had higher levels of beta amyloid.The Stanford researchers found that patients with lower sleep also performed worse on memory tests, while those with higher sleep (more hours) performed worse on executive function tests，which measure the brain's ability to switch between different tasks.―The main takeaway is that it is important to maintain healthy sleep late in life, Winer told CNN.1. What does the underlined word “disrupted” in paragraph 4 mean?A. difficultB. disorderedC. dissolvedD. different2. According to the findings, which of the following is NOT related to the disrupted sleep?A. It is more likely to cause old people to have bad memories over issues.B. It may contribute to dementia, cardiovascular disease and other illnesses.C. Some daily behaviors perhaps differ from those whose sleeping is normal.D It tends to bring all the old people to undergo brain scans and cognitive tests.3. What can we infer from the study?A. A proper sleep time for seniors is seven to eight hours.B. Low and high sleep patients were both poor at memory tests.C. Executive function test is applied to measure the capacity of brain.D. Keeping a healthy sleep for older adults late in life is crucial.BThe first patient who died on my watch was an older man with a faulty heart. We tried to slow it down with treatment, but it suddenly stopped beating completely. Later, whenever I would have a case like that one, I found myself second-guessing my clinical management. However, it turns out that thinking twice may actually cause more harm than good.In a working paper, Emory University researchers found that when doctors delivering a baby have a bad result, they are more likely to switch to a different delivery method with the next patient, often unnecessarily and sometimes with worse results.Because doctors make so many decisions that have serious consequences, thefalloutfrom second-guessing appears especially large for us. A 2006 study found that if a patient had a bleed after being prescribed (开药) warfarin, the physician was about 20% less likely to prescribe later patients the blood thinner that prevents strokes (中风). However, if a patient was not on warfarin and had a stroke physicians were still no more likely to prescribe warfarin to their other patients.These findings highlight interesting behavioral patterns in doctors. In the blood-thinner study, doctors were more affected by the act of doing harm (prescribing a blood thinner that ended up hurting doctors were more affected by the act of doing harm(prescribing a blood thinner that ended up hurting a patient) and less affected by letting harm happen (not prescribing a blood thinner and the patient having a stroke). Yet a stroke is often more permanent and damaging than a bleed.But this phenomenon is not unique to medicine. ''Overreaction to Fearsome Risks'' holds true for broadersociety.For instance, sensational headlines about shark attacks on humans in Florida in 2001 caused a panic and led the state to prohibit shark-feeding expeditions. Yet shark attacks had actually fallen that year and, according to the study, such a change was probably unnecessary given the extremely small risk of such an attack happening.Humans are likely to be influenced by emotional and often irrational (不理性的) thinking when processing information, bad events and mistakes. As much as we don't want to cause an unfortunate event to happen again, we need to be aware that a worst situation that can be imagined doesn't necessarily mean we did anything wrong. When we overthink, we fail to rely on thinking based on what we know or have experienced. Instead, we may involuntarily overanalyze and come to the wrong conclusion.I have treated dozens of patients who presented with the same illnesses as my first patient, who died more than a year ago. Instead of second-guessing myself, I trusted my clinical instinct (本能) and stayed the course. Every one of those patients survived. You should trust your instinct in your life, too.4. The first two paragraphs suggest that________.A. bad medical outcomes affect doctorsB delivering babies can be difficult workC. some doctors are not very experiencedD. doctors sometimes make silly mistakes5. In the blood-thinner study, doctors________.A. tend to prescribe less effective medicineB. are more concerned about the patients' safetyC. become less confident in writing a prescriptionD. believe a stroke is more treatable than a bleeding6. What does the underlined word ''fallout'' in Paragraph 3 probably mean?A. ResultB. BenefitC. DifferenceD. Absence7. The author will probably agree that________.A. we should not doubt our own decisionsB. our experience will pave way for our futureC. humans are emotional and irrational on the wholeD. instincts don't necessarily lead to wrong directionsCMy first week working in a restaurant, one of the servers said something that stuck with me: Everyone should work in a restaurant for at least a year. At the time, I didn't get it, but I took the advice to heart and worked in restaurants on and off for the next eight years. Before realizing it, I mastered many important skills, one of which is communication skill.When I was little, I was so shy that I used to hide behind my mom whenever someone spoke to me. And when I first started in restaurants, I had two personalities: Restaurant Lizzy and Home Lizzy. It was easier to pretend to be a different person while at work, since it was so different from who I actually was. But gradually, the skills I learned working in restaurants helped Home Lizzy come out of her shell in the real world.When you work in a restaurant, you don't have the luxury of hiding behind your parents to avoid talking to people. I'm still 110% an introvert, but restaurant work helped me communicate. Working in a restaurant not only helped me speak clearly, deliberately and directly but also taught me how to talk about almost everything. Some guests don't want their servers to interact too much with them, and that's fine. But some sit at the bar simply to chat with you. You learn how to judge your guests' level of interest in communicating with you, and how to exit a conversation at the appropriate time.My restaurant work is something that I'm most proud of and I know I wouldn't be the person I am today without those eight years of experience. If you're still on the fence about working in a restaurant for that long, start with one year. I doubt that you'll look back.8. What did the writer think of the server's words?A. Impressive.B. Ridiculous.C. Amusing.D. Logical.9. What do we infer from Paragraph 2?A. The writer tried different jobs.B. The writer became more sociable.C. The writer used an invented name.D. The writer had a hard time at work.10. Which of the following best describes the writer's restaurant work?A. Boring.B. Relaxing.C. Worthwhile.D. Unchallenging.11. What message does the writer try to convey in this passage?A. A strong-willed soul can reach his goal.B. Things are difficult before they are easy.C. Communication skills advance your career.D. Restaurantwork helps to achieve a better self.DMy wife and I recently completed a day-long tour of the Great Wall with Jessie. In addition to being very knowledgeable about the history of theareas that we toured, she spoke excellent English and was able to answer all of our questions. Her driver was very experienced and polite, and we really enjoyed being able to have a customized tour that avoided the tourist traps and forced shopping that seem to be a part of the larger group tours.The attractions themselves were fantastic. I was a little worried that the snowy weather might impact our trip to the Great Wall, but everything went fine, and there weren’t many people out at all that day. I suggest wearing strong shoes—the Great Wall is really a hike. And in snowy or rainy days, the surfaces are pretty slippery (滑的)! Seeing this area in winter was really unique, and the snow made for great pictures. Jessie kept us entertained with stories and facts about the construction of the Wall, and always pointed out great spots for taking pictures. Even though she’s in fantastic shape, she cared about our level of fitness and often stopped to let us catch our breath.When we got back to our hotel, Jessie gave us a great recommendation for dinner and some tips for our planned stops the next day. If I find myself in Beijing in the future, I will certainly be contacting Jessie for more tour opportunities, and I’ve already recommended her to some friends who are visiting the area later in the year. I can’t say enough about how kind and knowledgeable she was, and she really gave us a great tour experience.12. What can we infer about Jessie?A. She is a tour advisor.B. She is a tour guide.C. She is a foreign traveler.D. She is a skilled driver.13. When did the writer visit the Great Wall?A. In spring.B. In summer.C. In autumn.D. In winter.14. What did the writer think of his tour?A. Adventurous.B. Disappointing.C. Satisfactory.D. Improvable.15. What is the probable title for the text?A. A Wonderful Tour Day with JessieB. An Extraordinary Tour CompanyC. The Great Wall, an Excellent AttractionD. Jessie, a Kind and Knowledgeable Guide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。
2020届深圳市大鹏华侨中学高三英语上学期期中试卷及答案
2020届深圳市大鹏华侨中学高三英语上学期期中试卷及答案第一部分阅读（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AFind Your Chicago Architecture TourChicago is known around the world for its architecture. Whether you tour downtown or a neighborhood, our guides will tell you the stories behind the buildings.Must-see ChicagoMust-see Chicago is a fast-paced, 90-minute tour to Chicago featuring(以…为特色) some of its most famous buildings, including the Wrigley Building, Tribune Tower and more! Get a brief overview of more than a dozen buildings—as well as Chicago landmarks like Millennium Park, the Loop and the Chicago River.Duration: 1.5 hoursPrice: $ 26 public, free for CAC membersArchitecture HighlightsDiscover the exciting diversity(多样性) of Chicago architecture, which traces the city’s development from its founding through present day. We cover about 30 miles of Chicago design, passing through the Loop and the Gold Coast, as well as Hyde Park and other areas of the South Side. We’ll see two university campuses and several parks.Duration: 3.5 hoursPrice: $ 55 public, free for CAC membersHistoric Treasures of Chicago’s Golden AgeLearn about the great architectural landmarks of Michigan Avenue and State Street, with views inside beautiful buildings from the 1890s〜1930s. The most memorable parts include the amazing interiors(内部) of the Palmer House Hotel and the Chicago Cultural Center.Duration: 2 hoursPrice: $ 26 public, free for CAC membersElevated Architecture: Downtown “L” TrainExplore Chicago’s amazing architecture from the unique view of elevated trains and station platforms. Learn the history behind the famous “L” system and hear how it has shaped the development of buildings within theLoop. The city’s first elevated train started making trips in 1892. Now considered one of Chicago’s most wonderful features, the “L” offers impressive views of downtown.Duration: 2 hoursPrice: $ 26 public, free for CAC members1.Which tour can you choose if you want to see Millennium Park?A.Must-see Chicago.B.Historic Treasures of Chicago’s Golden AgeC.Architecture Highlights.D.Elevated Architecture：Downtown “L” Train.2.When visiting Architecture Highlights, a couple should pay ______.A.$55B.$ 110C.$ 165D.$ 2203.What can you see on the third tour?A.The Chicago River.B.The Gold Coast.C.The elevated trains.D.The Palmer House Hotel.BOne rainy afternoon, I was on a crosstown bus when ayoung woman jumped on. She had a child with her who must have been about 3 or 4 years old.The bus was full, bumpy, and it soon got noisy as her kid began crying because he couldn’t sit next to his mother. There were a couple of open seats, but they weren’t together. She wasflusteredand looked embarrassed.Then another woman, a little older, stood up and moved so that the mother and child could sit together. The mom smiled as a thank-you. And then three words came out of the older woman’s mouth that elevated the entire energy of that bus ride: “I’ve been there”.Simple, undramatic and honest. In that moment, it seemed to unite people. Why? Because almost all experiences are shared human experiences. We forget that, as we forge (前进) through life, focused onour own troubles and needs—which are actually less unique than we think. How can these three words create more connection in your life? Ask yourself: “Where am I holding back?One thing I know for sure is this: Healing others helps heal yourself. I noticed this recently with my friend, Tracy, who took a new friend who had suffered a miscarriage under her wing. Tracy had three of them before having her daughter two years ago. Our intellect needs a doctor to explain the medical side of things, yes. But our souls need human connection to help us along. No one can do that better than someone who has been exactlywhere you are.Can the essence of these three words help you make a small difference right now? It can be as simple as volunteering your seat, sharing some helpful advice or even lightening the mood with a joke when you notice that someone’s uncomfortable—because we’re all in this together.4. The underlined word “flustered” in the second paragraph is closest in meaning to _______.A. angryB. anxiousC.scaredD. upset5. What does the woman mean by saying “ I’ve been there”in the third paragraph？A. The woman was on the bus and saw what had happened to the boy.B. The woman got to her destination and was ready to get off the bus.C. The woman once had the similar experience with that mother.D. The woman took the exact seat that the boy was on just now.6. Which of the following statements is TRUE according to the passage?A. Everyone has his or her own unique problem that is difficult to solve.B. Doctors can help us get through when we have mental or physical problems.C. The author’s friend Tracy felt better after she was comforted by her new friend.D. One can indeed make a difference to those in need of help by doing simple things.7. The passage isintended to _______.A. show a harmonious world by telling some touching storiesB. praise those who are willing to help others in emergenciesC. appeal to readers to give timely help to those in needD. illustrate some ways of helping others in detailCAbout a billion birds die from flying into buildings each year inNorth America. Suspicions havebeen that birds may regard the open areas behind glass as safe passageways. Or they may mistake the reflected trees for the real thing.Researchers would like to reduce collisions, which requires a solid understanding about what makes a bird more or less likely to die by crashing into a building in the first place.“There was ly little known at a broad scale. Previous studies were at one small study site.'' Jared Elmore, a graduate student in natural resource ecology and management atOklahomaStateUniversity. So he and his colleagues used a previously created data set of building collisions for birds at 40 sitesthroughoutMexico,Canadaand theU.S.The first finding was obvious: bigger buildings with more glass kill more birds. But the details were more remarkable. "We found that life history predicted collisions. Migrants(候鸟), insect-eaters and woodland-inhabiting species collided more than their counterparts(同类).”Most migratory species travel at night, when lights near buildings can distract or disorient(使迷失方向)them. And Elmore thinks that insect-eating birds might be attracted to buildings because their insect prey(猎物)is attracted to the lights. He suspects that woodland species get tooled by the reflections of trees and bushes in the windows. The results are in the journal Conservation Biology.By understanding which birds are more likely to collide with buildings, researchers can perhaps determine the best way to adapt buildings, or their lighting, to help prevent such accidents. And by knowing risks, along with migration timing and behavior, building managers can better predict when birds are at their greatest danger - and improve lighting strategics accordingly.Elmore's next project will use radar to help predict bird migrations. " I think that would maybe go a long way in terms of providing information to people, to the public, to building managers, on when they can get the most benefit in terms of lights-out policies."8. What is the possible reason for birds' crashing into buildings?A. They didn't see the buildings.B. They took reflections for reality.C. They assumed the windows to be open.D. They considered buildings as safe routes.9. What is Jared Elmore's study different from the previous ones?A. It created a new data set.B. It went beyond national borders.C. It covered a wider range of sites.D. I’ll studied some specific bird species.10. What was the most noticeable finding of Jared Elmore's study?A. Migratory species travel at night.B. Birds tend to be misled by glasses.C. Bigger buildings cause more collisions.D. Birds living habits give rise to collisions.11. Which of the following can help reduce bird collision?A. Adjust the lightening system.B. Attach radars to each building.C. Adopt strict lights-out policies.D. Ban using glasses on buildings.DThe English language is changing, and you are responsible! Whether we consider changes in grammar, spelling, pronunciation, or the very vocabulary of the language, you have played your part and continue to do so.When we first learned basic grammar and spelling, perhaps in elementary school, we might have gotten the impression that these things were sacred. The rules that apply to such things might have been presented as unchanging and unchangeable. While this way might be helpful for teaching children, it is far from accurate.The English language, like many others, is a living, growing, ever-evolving thing. Like it or not, you are involved in this change. These changes take many forms. Grammar and spelling have changed greatly over the years and centuries, with the spelling differences in different countries today a reflection of this. While the language of a thousand years ago might be called English, most of us would hardly recognize it today as the same language.The first involves changes in the pronunciation of words. Many are familiar with the differences between the British and American ways of pronouncing certain words. In addition to these differences, the pronunciation of many words has changed over the years because of how you have decided to pronounce them. For example, consider the word "err." The traditional pronunciation of this word rhymes with the word "her." Older dictionaries show this to be the primary or only pronunciation. However, in recent years, more and more people have been pronouncing it so that it sounds like "air." Another change in the language involves the addition and removal of words. The makers of dictionaries decide which words deserve to be officially adopted as part of the English language. Through the centuries, many words have come from other languages. In fact, English has probably done this more than any other language in the world, which is why spelling and pronunciation rules for English have so many exceptions.Of course, many slang words have been just short-lived fashions that have died out quickly. Others, though, have been adopted by mainstream society and become respectable, as have many technical terms. So then remember, the next time you repeat the newest expression to hit the street, or make up your own words, you may be contributing to the future of the English language.12. When we begin to learn English, we think _________.A. it is interesting to pick up a new languageB. English rules are wrongly presented in factC. grammar and spelling rules are unchangeableD. only adults have the ability to affect a language13. From paragraph 3 we can know that_________.A. we can change the English languageB. many languages are changing over yearsC. English has changed little in the past 1,000 yearsD. there were main changes in grammar and pronunciation14. Why is the pronunciation of words changing?A. people speak in different waysB. people have adopted foreign wordsC. it has been affected by American EnglishD. makers of dictionaries often change them15. Which of the following is the best title for the passage?A. Foreign words involved in English.B. The British speaks differently from Americans.C. English language is changing over years.D. You can change the English language.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。
2020届深圳市大鹏华侨中学高三英语上学期期中考试试题及答案
2020届深圳市大鹏华侨中学高三英语上学期期中考试试题及答案第一部分阅读（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A4 Best Drive--In Movie Theaters in the USColorado: Holiday Twin Drive--InAddress: 2206 S Overland Trail, Fort Collins, CO 80526, USAPhone: +1 970-221-1244The theater, open since 1968 and currently the most popular drive-in in the US, provides various special foods. The menu there even amazes meat-free customers. But please remember the outside food is forbidden here. Besides, the Rocky Mountains provide a pastoral (田园式的) backdrop to screenings, and sunsets usually don’t disappoint either. It also offers lots of unique events that go beyond the big screen.North Carolina: Hound’s Drive--InAddress: 114 Raven Cir, Kings Mountain, NC 28086, USAPhone: +1 704-739-4424Having only opened in 2016, it’s one of the newest theaters on the block. The drive-in features newer equipment and digital projection. People can bring their animal friends along.Florida: Fort Lauderdale Swap ShopAddress: 3291 W Sunrise Blvd, Fort Lauderdale, FL 33311, USAPhone: +1 954-791-7927The Florida favorite offers plenty ofways to have fun. With 14 screens, the self-proclaimed (自称的) world’s largest drive-in equals any indoor cinema in terms of capacity and programming. It also includes an 88-acre flea (跳蚤) market and a free Ferrari museum. It’s best to book tickets on the Internet ahead of time if you don’t want to wait in line.California: Mission Tiki Drive -InAddress: 10798 Ramona Ave, Montclair, CA 91763, USAPhone: +1 909-628-0511Let’s have fun in the old-school outdoor cinema in Montclair, California. Remember tickets are available at the ticket office only. It alternates (交替) up to eight new releases on four screens and hosts almost daily swapmeets where people can exchange things they no longer need. It also organizes classic car and lowrider meet-ups.1.What can people do in Holiday Twin Drive-In?A.Participate in somespecial activities.B.Enjoy the film with the latest equipment.C.Learn about the benefits of being meat free.D.Share home-made cookies while watching the film.2.Which of the following theaters is friendly to visitors with pets?A.Hound’s Drive- In.B.Mission Tiki Drive-In.C.Holiday Twin Drive-In.D.Fort Lauderdale Swap Shop.3.What do Fort Lauderdale Swap Shop and Mission Tiki Drive-In have in common?A.Both feature old-fashioned styles.B.Both allow booking tickets online.C.Both provide free museum exhibitions.D.Both offer chances to trade second-hand goods.BYour house may have an effect on your figure.Experts say the way you design your home could play a role in whether you pack on the pounds or keep them off. You can make your environment work for you instead of against you. Here are some ways to turn your home into part of your diet plan.Open the curtains and turn up the lights. Dark environments are more likely to encourage overeating, for people are often less selfconscious (难为情) when they’re in poorly lit places—and so more likely to eat lots of food. If your home doesn’t have enough window light, get more lamps and flood the place with brightness.Mind the color1 s. Research suggests warm color1 s fuel our appetites. In one study, people who ate meals in a blue room consumed 33 percent less than those in a yellow or red room. Warm color1 s like yellow make food appear more appetizing, while cold color1 s make us feel less hungry. So when it’s time to repaint, go blue.Don’t forget the clock—or the radio. People who eat slowly tend to consume about 70 fewer calories (卡路里) per meal than those who rush through their meals. Begin keeping track of the time, and try to make dinner last at least 30 minutes. And while you’re at it, actually sit down to eat. If you need some help slowing down, turn on relaxing music. It makesyou less likely to rush through a meal.Downsize the dishes. Big serving bowls and plates can easily make us fat. We eat about 22 percent more when using a 12inch plate instead of a 10inch plate. When we choose a large spoon over a smaller one, totalintake (摄入) jumps by 14 percent. And we’ll pour about 30 percent more liquid into a short, wide glass than a tall, skinny glass.4. The text is especially helpful for those who care about ____________.A. their home comfortsB. their body shapeC. house buyingD.healthy diets5. A home environment in blue can help people ______________.A. digest food betterB. reduce food intakeC. burn more caloriesD. regain their appetites6. What are people advised to do at mealtimes?A. Eat quickly.B. Play fast music.C. Use smaller spoons.D. Turn down the lights.7. What can be a suitable title for the text?A. Is Your House Making You Fat?B. Waysof Serving DinnerC. Effects of SelfConsciousnessD. Is Your Home Environment Relaxing?CIn order to develop the pandemic-stricken economy, China recovered the street vendors（商贩）in a new nation-wide method known as “street stall economy'', allowing residents to set up open-air shops on the sidewalks or other available public spaces.Street vendors were once an important part ofChina's economy and urban landscape. However, sinceChina's economy took off in the last decade, street vendors have gradually disappeared from the streets and many of them opened shops of their own.Fast forward to today, street vendors have come into our sight again after cities such asChengduand Yantai succeeded in creating hundreds of thousands of jobs by giving street stalls permission to operate.China's tech industry was quick to jump on the street vendor trend, with tech giants including Alibaba, Tencent, Meituan and flocking todish outcheap loans, offer support and payment solutions to millions of owners of newly established small businesses.Ant Financial, Alibaba's fintech arm, promised its mobile wallet app Alipay will give interest-free loans to 30 million vendors, and 70 billion RMB of interest-free credit line to consumers to make purchases everywhere, including street vendors. provided 50 billion RMB worth of quality goods for street vendors, and provided each one of themwith a maximum 100,000 RMB interest-free loan to stock up.Tencent's WeChat announced to offer payment solutions, marketing supports and even training for up to 50 million street vendors, with the end goal of digitally transforming them to increase their income.Guangzhoucity partnered with WeChat this month to hold a live streaming shopping festival to improve sales of local produce. In attempts to promote various live streaming platforms, many tech CEOs also made their own live streamed e-commerce debuts（首次亮相）selling goods coming from all over the country.8. What does the underlined part “dish out" in Paragraph 3 mean?A. turn down.B. provide with.C. pay off.D. apply for.9. Compared with and Tencent, what unique measure did Ant Financial take?A. It provides interest-free loans for vendors.B. It offers interest-free credit line to customers.C. It provides quality goods for street vendors.D. It offers marketing support to businessmen.10. What's the purpose of the cooperation between WeChat andGuangzhoucity?A. To volunteer to train street vendors.B. To give away free goods to the poor.C. To promote to develop the local economy.D. To help CEOs make their own streaming platforms.11. What can be the best title for the text?A. Chengdu and Yantai Succeeded in Creating Job OpportunitiesB. "Street Vendor Economy” Greatly Increases People's IncomeC. The Whole Nation Are Involved in a New Economy ModelD.China's Major Tech Companies Are Helping With "Street Vendor Economy”DIt is universally acknowledged that renewable energy sources such as solar, wind and hydropower are all much better for the climate than fossil fuels.It is true for wind and solar. However, the picture for hydropower is more complicated than we think.A new study by the Environmental Defense Fund analyzed the climate impacts of 1,500 hydropower facilities across the globe. That accounts for about half of hydropower generation worldwide. The researchers looked atwhether the facilities behave as a greenhouse gas sink or as a source. To figure this out, they looked into all the different components that help determine a hydropower facility's greenhouse gasemissions (排放).“There are so many contributors to greenhouse gas emissions from hydropower — but essentially, the majority of greenhouse gas emissions arise from the reservoir (水库) itself, as vegetation and soils are submerged underwater in the dam thatis used for the hydropower generation.” said lissa Ocko, a senior climate scientist at the Environmental Defense Fund and co-author of the study. As the submerged vegetation breaks down, it releases greenhouse gases such as CO2.“The larger the surface area of the reservoir, the more greenhouse gases are going to be given out from that reservoir. Also, the temperature plays a role as well how warm the reservoir is will affect how much greenhouse gases are produced and given out from the reservoir.” added Ocko.Through their analysis, Ocko and her co-author Steven Hamburg, also with the Environmental Defense Fund, discovered that the climate impacts of hydropower cover a complete range. The good news is that some facilities perform just as well as wind and solar. But shockingly, more than 100 facilities are actually worse for the climate than fossil fuels. The study is in the journalEnvironmentalScience and Technology.This finding doesn't mean we should forget about hydropower. “But we just need to be careful to make sure that we have climate benefits. There are a lot of situations where hydropower can be equal to wind and solar. So it really depends on the specific facility." said Ocko.12. How do scientists prove hydropower facilities' effect on the climate?A. By making comparisons.B. By conducting experiments.C. By referring to previous studies.D. By analyzing causes and effects.13. What are the main sources of greenhouse gases from hydropower?A. Vegetation and soils.B. Heat and sunlight.C. Pollutants in the reservoir.D. Components of the generators.14. What have Ocko and her co-author Steven Hamburg found?A The surface area of a reservoir decides the climate.B. Hydropower often influences the climate in all aspects.C. Some facilities perform much better than wind and solar.D. Fossil fuels are worse for the climate than over 100 facilities.15. What is the text mainly about?A. Scientists urge an end to hydropower.B. Hydropower is not necessarily green.C. Hydropower is worse than fossil fuels.D. Renewable energy is a complicated issue.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。
2020届深圳市大鹏华侨中学高三英语上学期期中试卷及答案
2020届深圳市大鹏华侨中学高三英语上学期期中试卷及答案第一部分阅读（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ARome can be pricey for travelers, which is why many choose to stay in a hostel (旅社). The hostels in Rome offer a bed in a dorm room for around $25 anight, and for that, you’ll often get to stay in a central location (位置) with security and comfort.Yellow HostelIf I had to make just one recommendation for where to stay in Rome, it would be Yellow Hostel. It’s one of the best-rated hostels in the city, and for good reason. It’s affordable, and it’s got a fun atmosphere without being too noisy. As an added bonus, it’s close to the main train station.Hostel Alessandro PalaceIf you love social hostels, this is the best hostel for you in Rome. Hostel Alessandro Palace is fun. Staff members hold plenty of bar events for guests like free shots, bar crawls and karaoke. There’s also an area on the rooftop for hanging out with other travelers during the summer.Youth Station HostelIf you’re looking for cleanliness and a modern hostel, look no further than Youth Station. It offers beautiful furnishings and beds. There are plenty of other benefits, too; it doesn’t charge city tax; it has both air conditioning and a heater for the rooms; it also has free Wi-Fi in every room.Hotel and Hostel Des ArtistesHotel and Hostel Des Artistes is located just a 10-minute walk from the central city station and it’s close to all of the city’s main attractions. The staff is friendly and helpful, providing you with a map of the city when you arrive, and offering advice if you require some. However, you need to pay 2 euros a day for Wi-Fi.1.What is probably the major concern of travelers who choose to stay in a hostel?fort.B.Security.C.Price.D.Location.2.Which hotel best suits people who enjoy an active social life?A.Yellow Hostel.B.Hostel Alessandro Palace.C.Youth Station Hostel.D.Hotel and Hostel Des Artistes.3.What is the disadvantage of Hotel and Hostel Des Artistes?A.It gets noisy at night.B.Its staff is too talkative.C.It charges for Wi-Fi.D.It’s inconveniently located.BNASA has flown an aircraft on another planet for the first time. On Monday, April 19, Ingenuity, a 1. 8-kilogram drone (无人机) helicopter, took off from the surface of Mars, flew up about threemeters, then hovered for 40 seconds and took photos above with one of its two cameras. The historic moment was livestreamed on YouTube. “We can now say that human beings have flown a drone helicopter on another planet,” said MiMi Aung, the Ingenuity Mars Helicopter project manager at NASA's Jet Propulsion Laboratory, at a press conference. “We, together, flew at Mars, and we, together, now have our Wright brothers moment,” she added, referring to the first powered airplane flight on Earth in 1903.The details: The flight was a significant technical challenge, thanks to Mars' s bone-chilling temperatures (nights can drop down to -130 °F / -90 °C) and its incredibly thin atmosphere — just 1% the density of Earth' s. That meant Ingenuity had to be light, with rotor blades (螺旋桨) that were bigger and faster than would be needed to achieve liftoff on Earth (although the gravity on Mars, which is only about one-third of Earth's, worked in its favor). The flight had originally been scheduled to take place on April 11 but was delayed by software issues.Why it's significant: Beyond being a significantmilestonefor Mars exploration, the flight will also pave the way for engineers to think about new ways to explore other planets. Future drone helicopters could help astronauts by scoping out locations, exploring inaccessible areas, and capturing images. Ingenuity will also help inform the design of Dragonfly, a car-size drone that NASA is planning to send to Saturn's moon Titan in 2027.What's next: In the next few weeks, Ingenuity will conduct four more flights, each lasting up to 90 seconds. Each one is designed to further push the limits of Ingenuity's capabilities. Ingenuity is only designed to last for 30 Martian days, and is expected to stop functioning aroundMay 4. Its final resting place will be in the Jezero Crater as NASA moves on to the main focus of its mission: Getting the Perseverance rover (毅力号火星探测器) to study Mars for evidence of life.4. Why does MiMi Aung mention Wright brothers?A. To honor the historic contribution of Wright brothers.B. To make a comparison between Wright brothers and herself.C. To highlight the importance of Ingenuity's Martian exploration.D. To remind the public of the first powered airplane flight on Earth.5. What caused challenges for Ingenuity designers?A. The delay of software tests.B. The force of gravity on Mars.C. Mars's temperatures and atmosphere.D. Technical difficulty in liftoff on Earth.6. What does the underlined word “milestone” in Paragraph 3 probably mean?A. A great victory.B. A difficult task.C. A roadside stone.D. A historic event.7. Which of the following can be a suitable title for the text?A. Mars Drone Helicopter Makes Historic First FlightB. Modern Wright Brothers Moment: Mars ExplorationC. First Drone Helicopter Spots Evidence of Life on MarsD. Ingenuity: Mars Drone Flies to Take Incredible PicturesCThe herd of elephants moving north after leaving the Xishuangbanna National Nature Reserve in Yunnan province has drawn widespread public attention, with tens of millions of people following its movement on TV programs and social media platforms.But this is not because it’s the first time wild Asian Elephants have wandered away from their habitat and headed northward, but for only this time the herd has traveled more than 400 kilometers as far as Kunming. Photographs, videos and stories of the herd’s movement have sparked widespread discussions even overseas.However, there is a need to go behind the “cute photos” and the seemingly “fantastic” event and identify the reasons why wild elephants are leaving their habitat, and find ways to establish harmonious human-animal relationship within habitats and the surrounding forests and human settlements. It is important to scientifically mark the limits of the habitats for elephants and other animals in Xishuangbanna and elsewhere in the country for ecological reasons as well.Planting trees is a key and fundamental step toward restoration of nature. Yet long-term investment and a more scientific approach are needed to maintain the remaining forests as well as to extend the forest cover and strengthen conservation.Nevertheless, tree cover alone doesn’t mean a suitable habitat for all animals, for different species need different types of vegetation to survive and breed. The elephant herd in Yunnan is a reminder that we have toscientifically conserve the existing forests and turn them into suitable habitats for different species of animals and birds, which will ultimately benefit humans.More ambitious targets should be set to rebuild or improve the food chain, and measures taken to ensure forest resources help wildlife flourish, in order to establish a harmonious human-animal relationship.Forests around the globe are still shrinking, particularly those in tropical and developing countries. The next decade therefore will be extremely important for the world’s forests and wildlife, and China can play a leading role in saving them by better protecting its forests and expanding its forest cover.8. Why has the herd of elephants caused so much public interest?A. There exist heated discussions in the whole country even overseas.B. TV programs and social media platforms want to benefit from them.C. They are the first wild Asian Elephants to leave their natural habitat.D. The elephants has traveled a long distance and lived in harmony with humans.9. What can we infer from the third paragraph about the “fantastic” event?A. More research on the reasons behind the event is required.B. Scientists need to limit the habitats for elephants and other animals.C. People should find ways to have a good relationship with elephants.D. There’s an urgent demand for detailed information about the elephants.10. Which method is provided in the passage to restore nature?A. Expanding the coverage of forest.B. Getting the government’s policy support.C. Bringing up various ways to protect the forests.D. Offering more kinds of vegetation to all animals.11. What does this event of elephants leaving their habitats remind us to do?A. To set more goals to change the food chain.B. To be aware of the situation of the existing forests.C. To realize harmonious coexistence of human and nature.D. To reduce the destruction of the forests around the globe.DImagine that youare a superhero. Your superpowers are activated by a special suit. The suit communicates with your brain. It allows you to do amazing things with only a thought. By concentrating on strength, for example,you can kick a soccer ball across a field. By focusing on swift actions, you can jump to the top of a tree.Such a connection between mind and machine may sound like a fantasy. To scientists, though, it is a very real goal. They are creating machines that let disabled monkeys walk. These machines may soon help disabled humans do the same. Unlike other bionic devices, these robotic “super suits” do not communicate with muscles and nerves. Instead, they have a direct line to the brain.In 2005, doctors drilled a hole in the skull of Hutchinson, who had lost her right arm in an accident. Then they inserted a sensor onto her motor cortex (大脑皮层运动区). Wires connected the sensor to a receiver on her head. After she recovered, researchers pluggedHutchinson’s receiver into a cable that relayed signals from her brain to computers. Then they connected a robotic arm to the computers. The computerscould interpretHutchinson’s brain signals to move the arm.Soon,Hutchinson, the computer, and the robotic arm became a team.Hutchinsonwas even able to lift her hand and drink from a cup. “She smiled when she put down that drink—that’s everything.” says Donoghue, a brain scientist.Today other scientists are building on that success. One of those scientists is Dr. Miguel Nicolelis, who designed a whole-body bionic equipment. In 2014, a disabled former athlete kicked the first ball of the World Cup Games wearing one of Miguel’s full-body exoskeletons.The exoskeleton was connected to brain signal sensors in the man’s cap. By thinking about kicking, he sent signals to a computer on his back. The computer then translated the signal into an exoskeleton-aided kick. Such designs may become common as scientists keep merging mind and machine.12.Which can best describe the tone of paragraph 1?A. Narrative and serious.B. Persuasive and critical.C. Informative and objective.D. Descriptive and imaginative.13. What is paragraph 3 mainly about?A. Reason of the experiment.B. Results of the experiment.C. Process of the experiment.D. Significance of the experiment.14. Why is Dr. Miguel’s exoskeleton special?A. It can be used on animals.B. It can move the whole body.C. It was supported by computers.D. It was connected directly to the brain.15. What can be inferred from the last paragraph?A. Robotic suits may be widely used to help disabled people.B. Exoskeleton is more common thanHutchinson’s bionic arm.C.Scientific experiments are commonly carried out in football fields.D. Disabled athletes can now play football again with the help of computer.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。
2020年深圳市大鹏华侨中学高三生物下学期期中试卷及答案解析
2020年深圳市大鹏华侨中学高三生物下学期期中试卷及答案解析一、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. 某种果蝇的长翅(A)对残翅(a)为显性，直翅(B)对弯翅(b)为显性，腿上刚毛(D)对截毛(d)为显性。
现有这种果蝇的一个个体的基因组成如图所示,下列选项中错误的是（）A.长翅与残翅、直翅与弯翅这两对相对性状的遗传不遵循基因自由组合定律B.该果蝇个体发育时，翅部细胞中不能表达的基因有a、D、dC.在染色体不发生交叉互换的情况下，基因A与a分离的时期为减数第一次分裂后期D.该细胞经减数分裂形成精细胞基因型为AbD、abd或Abd、abD2. 下列关于真核生物、原核生物和病毒的叙述中正确的是（）A.乳酸菌、青霉菌、大肠杆菌都属于原核生物B.乳酸菌、酵母菌都含有核糖体和DNAC. T2噬菌体中只有一种细胞器，核糖体D.有些细菌只含有RNA3. 生态学上把在一定时间内占据一定空间的同种生物的所有个体称为种群。
图是某个鼠群迁入一个新环境后的种群数量增长曲线图。
下列相关叙述正确的是（）A. 防治鼠害应该在种群数量达到c点后进行B. 可采用样方法来调查该鼠的种群密度C.b点时该鼠群出生率大于死亡率D. 鼠群数量达到c点后一定稳定不变4. 组成细胞膜的主要成分是（）A.磷脂、蛋白质B.糖脂、糖蛋白C.脂质、蛋白质、无机盐D.磷脂、蛋白质、核酸5. 如图分别表示pH与酶活性的关系，下列叙述正确的是A. 曲线B上m点继续降低pH，酶活性降低但空间结构不变B. 曲线A、B可分别对应胰蛋白酶、胃蛋白酶C. 由酶催化生化反应和由ATP为生命活动供能都是生物界的共性D. 酶能降低化学反应活化能，因此具有高效性6. 如图是真核细胞膜的亚显微结构模式图，①～①表示物质。
下列有关叙述正确的是（）A.在光学显微镜下能分辨出图中构成细胞膜的各种组分B.不同膜结构的差别可以体现在①①的不同C.精子和卵细胞的识别过程依靠的结构基础是①D.膜的流动性与①有关而与①无关7. 同自然界的许多生物一样，细胞也是由多种分子组成的。
2020-2021学年深圳市大鹏华侨中学高三英语期中考试试卷及答案解析
2020-2021学年深圳市大鹏华侨中学高三英语期中考试试卷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ABook reading is certainly one of the most absorbing habits. For young adults who love to read, finding some good books to read is very essential. Writing a book review can help you to improve your language and writing skills.The Book ThiefListed onThe New York Times Children’s Best Seller List for over 100 weeks, The Book Thief by Markus Zusak is the story of a young girl in the Nazi camps set during World War II. So, if you love history and wish to learn how the life was during Adolf Hitler’s time, read this historic book.The Diary of Young GirlEven Anne Frank can not have imagined that her personal diary written during World War II would become such a popular book. It’s a must read that describes the situation of a family in the evils of wars through the eyes of a teenager.Animal FarmAnimal Farm is one of the most popular books by George Orwell. It is just a reflection of the Stalin and World War II period that has been so creatively presented in this book. It is an interesting example of how literature can be used to present conditions common in the society.Adventures of Huckleberry FinnMark Twain’s Adventures of Huckleberry Finn is one of the great American novels in history, and is certainly a great pick for young adults. Young Huck Finn and his mischief along with the color1 ful description of people around theMississippi Rivermake this novel a great book to read.1.Which book describes the author’s own experiences according to this passage?A.The Book ThiefB.The Diary of Young GirlC.Animal FarmD.Adventures of Huckleberry Finn2.What do the first three books have in common?A.All of them are about wars.B.All of them are about farms.C.All of them are intended for history lovers.D.All of them were written during World War II.3.The purpose of this passage is to _________.A.instruct youngsters how to improve skillsB.tell youngsters some wonderful reading habitsC.introduce several good books to youngstersD.give youngsters advice on writing a book reviewBTwo years ago, I decided to study at theUniversityofSt. Edwardsin the city ofAustin,Texas. When I was on my research to find the perfect place to study in, I considered many aspects: a safe place, a city where there were companies devoted to marketing or technology, a place where speaking Spanish and English was an advantage and a school where I could learn about digital strategies (数字策略). After comparing and evaluating many cities and universities. I finally decided onAustin.Since I arrived inAustin,Texas. I had been living inside the university where I had a private room and shared common areas with more students. University life was not very different from the life inMexicoand classes weresemblableand the way of socializing too. However, in theUnited States, the classes were more practical and teachers encouraged you to be self-responsible and complete your tasks.The classes that I was taking were related to social media, digital marketing and advertising. I was very excited to be able to study technology-related courses.What I liked most about the experience was being able to live with students from many places, which allowed me to learn from other cultures and to share mine with other students. Also, international student services usually organized events and tours that helped me to get to know the city and the school.I certainly think that studying abroad is a beneficial experience. It makes us capable of understanding cultural differences and accepting diversity. Personally, I would suggest that you first determine what your goals are by going abroad, research the opportunities and lifestyle, evaluate your universities,and finally decide on the one where you feel more comfortable, connecting with your values and way of seeing life.4. Which of the following can best describe the author according to paragraph 1？A. Casual.B. Cautious.C. Changeable.D. Adventurous.5.What does the underlined word “semblable” in paragraph 2 probably mean?A. Worthwhile.B. Practical.C. Same.D. Similar.6. What made the author most pleased?A. Speaking Spanish and English inAustin,Texas.B. Working as a designer in a technology company.C. Having a chance to learn about different cultures.D. Organizing many events and tours independently.7. What are the students who intend to study abroad advised to do?A. Be careful to choose the university to study in.B. Set no limits on theiracademic performances.C. Study where they're familiar with everything.D. Adjust personal lifestyles for the university.CHave you ever noticed that some people can eat what they want and stay in shape, while others carefully watch what they eat and still put on weight? How annoying! However, scientists are beginning to believe that some people get the ability to stay thin from their parents.Scientists say that when some people eat, their bodies will naturally store the excess energy from food as fat. These people gain weight if they eat more than they need each day. Meanwhile, other people eat more than they need but their bodies are able to “burn off” the extra food without making fat, so they rarely have weight problems.To show that this is true, scientists have experimented on laboratory mice. They gave the mice a special diet with a lot of fat. Some mice gained weight while the other mice stayed thin, even though both groups of mice ate the same amount of food and got the same amount of exercise. Scientists concluded that weight gain seemed to be influenced by genetic (基因的) factors. They also believe they have now identified the genes that may cause this tendency. These genes, according to the scientists, get passed down the generations. Armed with this knowledge, they believe it may be possible to develop medicines thatcan target the genes and stop people from gaining weight.The study of weight gain is becoming more important as the numbers of people who are overweight continues to grow. In theUnited States, over seventy percent of the population have weight problems. This means they are at risk of illness such as high blood pressure and heart disease.Current medicines for weight control do not work very well because they can have serious side effects, such as heart problems. However, it takes a long time to develop and thoroughly test new drugs. Therefore, despite this breakthrough in the study of weight-loss drugs, scientists and health professionals all agree that currently the best way to control weight gain is to have a healthy, balanced diet and an active lifestyle with daily exercise. This will not only help people avoid becoming overweight, but also help them stay healthy and energetic.8. According to the scientists, some people ________.A. are able to stay thin because of genetic factorsB. can eat what they want and stay healthy foreverC. usually keep doing exercise to lose their weightD. don’t eat anything every day but still put on weight9. Some people don’t need to worry about weight problems because ________.A. they eat many vegetablesB. they eat less than othersC. they don’t store any energy from food as fatD. they can burn off the extra food without making fat10. What can we learn from the passage?A. Fewer people will have weight problems in the future.B. People with weight problems may suffer from heart trouble.C. We now have good medicine for people with weight problems.D. The result of the experiments on mice and humans are different.11. What does the last paragraph imply?A. Current medicine solve weight problems well.B. We should exercise regularly and eat properly.C. Taking exercise every day may cause heart problems.D. Testing new drugs is hard because of the side effects.DScott and Daniel Harry are enjoying everyday tasks like shopping and washing for the first time following their move to an accommodation (住宿) support house in Kurwongbah, north of Brisbane last year.Disability Services Queensland’s Strengthening Non-Government Organisations project provided an accommodation support model that would enable residents (居住者) like Daniel and Scott to live moreindependently.The house is just one of many accommodation support services funded (资助)through the project. The five-bedroom house provides 24-hour care for up to four individuals with complex needs, including medical support. Care and staffing levels are varied and flexible, depending on each resident’s requirements.Scott and Daniel, who have a severe form of Duchenne Muscular Dystrophy, require 24-hour support in all activities of daily living. Before they moved to the house, they lived with their family. Scott says living at home was difficult as it placed a physical and emotional strain(负担) on their parents who had to wake them several times each night to reposition them or place them on breathing machines.“We were heavyhearted,” says Scott, who is planning to write a book about his life experiences. “But our parents now have a lot moretime for themselves. We now manage ourselves on a day-to-day basis.”Daniel is an enthusiastic gardener, taking care of his own vegetable garden. The men share the house with one other young man, and they go to rugby league games, meeting up with friends.Leeding Care Australia provides the care service at Kurwongbah. Manager Lee Garniss says setting up the facilities (设施) has not been without its challenges.“It is an unconventional model of care,” Lee says. “The home is Scott and Daniel’s home, however it is also a workplace for their support staff. Balancing these two requirements has been a challenge for all.”“We have experienced a bit of a learning phase over the last twelve months. However, by working as a team we try our best to meet the needs of both residents and staff and I think we have achieved the right balance.”12. What do we know about the house Scott and Daniel live in now?A. It was built by their parents.B. It can accommodate four residents.C. It belongs to a governmental project.D. It’s located in the center of Brisbane.13. Why did Scott and Daniel’s parents wake up frequently at night?A. To help them do exercise.B. They were making a lot of noise.C. To check on their breathing.D. They were under emotional pressure.14. How did Scott feel while living with his parents?A. A bit guilty.B. Quite happy.C. Very proud.D. Slightly angry.15. What was a challenge while setting up the facilities?A. Lack of fund.B. No workplace.C. Inexperienced staff members.D. Satisfying both staff and residents’ needs.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。
2020-2021学年深圳市大鹏华侨中学高三生物期中考试试卷及答案
2020-2021学年深圳市大鹏华侨中学高三生物期中考试试卷及答案一、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.以下关于甲状腺激素作用特点的叙述，错误的是（）A.需借助体液运输B.发挥作用后立即失活C.在代谢时发挥催化作用D.作用于特定的细胞、器官2.科学家用显微技术除去变形虫的细胞核后，发现其细胞代谢减弱，运动停止；当重新植入细胞核后，细胞代谢恢复，运动恢复。
这说明了细胞核是（）A. 细胞代谢的主要场所B. 细胞遗传特性的控制中心C. 遗传物质的储存和复制场所D. 细胞生命活动的控制中心3.如图表示某种生物的部分染色体发生了两种变异的示意图,图中①和②、③和④互为同源染色体,下列叙述不正确的是A.图a发生在四分体时期,未产生新的基因,但可以产生新的基因型B.图a为基因重组,图b为染色体结构变异C.图b中的变异产生了新的基因,改变了基因的排列顺序,该变化大多数对生物体是有害的D.图a在光学显微镜下看不到,图b在光学显微镜下能看到4.下列有关生物膜的叙述正确的是（）A.高尔基体是膜面积很大的细胞器，它向外可连接细胞膜，向内可连接核膜B.胆固醇是动物细胞膜的组成成分，并参与人体内血液中脂质的运输C.细胞膜具有选择透过性，细胞不需要的对细胞有害的物质不能进入细胞D.罗伯特森在电镜下看到了细胞膜清晰的暗—亮—暗的三层结构，提出所有的生物膜都是由磷脂—蛋白质—磷脂三层结构构成的5.下列有关细胞共性的叙述，正确的是（）A.遗传物质都是DNA但不一定具有染色体B.都具有细胞膜但不一定具有磷脂双分子层C.都能合成蛋白质但不一定具有核糖体D.都能进行有氧呼吸且都发生在线粒体中6.研究发现，Rubisco酶是绿色植物细胞中含量最丰富的蛋白质，功能上属于双功能酶。
当CO2浓度较高时，该酶催化C5与CO2反应，完成光合作用；当O2浓度较高时，该酶催化C5与O2反应，产物经一系列变化后到线粒体中生成CO2，这种植物在光下吸收O2产生CO2的现象称为光呼吸。
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深圳大鹏华侨中学2020年期中单元测试一、选择题1．大雪天车轮打滑，车辆难以前进，交警帮忙向前推车，如图所示，在推车的过程中，关于人和车之间的作用力，下列说法正确的一是（）A ．车对人有向后的力B ．车对人没有作用力C ．人对车的力大于车对人的力D ．人对车的力小于车对人的力2．如图所示，一物块置于水平地面上．当用与水平方向成060角的力1F 拉物块时，物块做匀速直线运动；当改用与水平方向成030角的力2F 推物块时，物块仍做匀速直线运动．若1F 和2F 的大小相等，则物块与地面之间的动摩擦因数为A 31B ．23C ．3122-D ．1-323．下列关于重力说法中正确的是A ．重力的方向一定竖直向下，可能指向地心B ．物体的重心一定在其几何中心C ．物体的重力总等于它对竖直测力计的拉力D ．把地球上的物体移到月球上，物体的质量和所受重力变小4．一石块从楼顶自由落下，不计空气阻力，取210m/s g =．石块在下落过程中，第4s 末的速度大小为（ ）A ．10m/sB ．20m/sC ．30m/sD ．40m/s5．下列情况中，能将某同学看成质点的是（ ）A ．研究某同学上课时的坐姿B ．研究某同学打篮球时投篮的动作C ．研究某同学军训时踢正步的动作D ．研究某同学在运动会上进行3000m 跑比赛时所用的时间6．下列说法正确的是( )A．木块放在桌面上所受到的向上的弹力是由于木块发生微小形变而产生的B．木块放在桌面上对桌面的压力是由于木块发生微小形变而产生的C．用细竹竿拨动水中的木头，木头受到的竹竿的弹力是由于木头发生形变而产生的D．挂在电线下面的电灯对电线的拉力，是因为电线发生微小形变而产生的7．下列说法中正确的是（）A．“辽宁号”航母“高大威武”，所以不能看成质点B．战斗机飞行员可以把正在甲板上用手势指挥的调度员看成是一个质点C．在战斗机飞行训练中，研究战斗机的空中翻滚动作时，可以把战斗机看成质点D．研究“辽宁舰”航母在大海中的运动轨迹时，航母可以看成质点8．如图所示，此时表演者静止在弯曲倾斜的竹竿上，则下列说法正确的是（）A．表演者对竹竿的弹力是由竹竿形变产生的B．表演者对竹竿的力竖直向下C．表演者对竹竿的摩擦力一定为零D．表演者对竹竿的力大于竹竿对表演者的力9．2018 年 10 月 23 日港珠澳大桥正式通车，它是目前世界上最长的跨海大桥，为香港、澳门、珠海三地提供了一条快捷通道。
图甲是港珠澳大桥中的一段，一辆小汽车在长度为L=21m的平直桥面上提速，图乙是该车在该段的车速的平方（v2）与位移（x）的关系。
则关于小汽车通过该段平直桥面的加速度和时间分别为A．4m/s2 6sB．2m/s2 3sC．2m/s2 5sD．2m/s221s10．下列情况中的运动物体，不能被看作质点的是A．欣赏某位舞蹈演员的舞姿B．用GPS确定远洋海轮在大海中的位置C．天文学家研究地球的公转D．计算男子400米自由泳金牌得主孙杨的平均速度11．一辆汽车正在笔直的公路上以72km/h的速度行驶，司机看见红色交通信号灯便踩下刹车．此后汽车开始匀减速运动，设汽车做匀减速直线运动的加速度大小为4m/s2．开始制动后，前6s内汽车行驶的距离是A ．40mB ．48mC ．50mD ．80m12．如图，体育课上一学生将足球踢向固定的木板，下列关于足球与木板作用时木板给足球的弹力方向的说法正确的是A ．沿v 1的方向B ．沿v 2的方向C ．沿垂直于木板斜向左上方的方向D ．先沿v 1的方向后沿v 2的方向13．甲、乙两车在同一平直公路上同向运动，甲做匀加速直线运动，乙做匀速直线运动。
甲、乙两车的位置x 随时间t 的变化如图所示。
下列说法正确的是（ ）A ．在时刻t 1，两车速度相等B ．在时刻t 1，甲车追上乙车C ．从t 1到t 2时间内的某时刻，两车速度相等D ．从t 1到t 2时间内，甲车走过的路程大于乙车走过的路程14．某质点在0~3s 内运动的v -t 图象如图所示，关于质点的运动，下列说法中正确的是( )A ．质点在第1s 内的平均速度等于第2s 内的平均速度B ．t=3s 时，质点的位移最大C ．质点在第2s 内的加速度与第3s 内的加速度大小相等，方向相反D ．质点在第2s 内的位移与第3s 内的位移大小相等，方向相反15．某质点沿x 轴做直线运动，其位置坐标随时间变化的关系可表示52n x t t =+，其中x 的单位为m ，时间t 的单位为s ，则下列说法正确的是（ ）A ．若1n =，则物体做匀速直线运动，初位置在0m ，速度大小为5m /sB ．若1n =，则物体做匀速直线运动，初位置在5m ，速度大小为4m/sC ．若2n =，则物体做匀变速直线运动，初速度大小为5m /s ，加速度大小为24m/sD ．若2n =，则物体做匀变速直线运动， 初速度大小为5m /s ，加速度大小为22m/s16．如图所示，足球迎面撞上运动员的脸部，下列说法中错误．．的是A ．由于运动员的脸部形变，它对运动员脸部产生弹力B ．发生撞击时，足球的形变越明显说明产生弹力越大C ．由于足球的形变，它对运动员脸部产生弹力D ．足球与运动员脸部之间产生弹力的前提是它们相互接触17．如图所示，一只重为G 的松鼠站在倾斜角为α的树枝上，则树枝对松鼠的作用力为（ ）A ．GcosαB ．GC ．GtanαD ．Gsinα18．在研究运动和力的关系时，伽利略提出了著名的理想实验，示意图如图．伽利略提出该理想实验的最主要意图是（ ）A ．为了说明力是维持物体运动的原因B ．为了说明力可以改变物体的运动C ．为了说明物体运动不需要力来维持D ．为了说明物体运动时就会产生惯性19．图中的大力士用绳子拉动汽车，绳中的拉力为F ，绳与水平方向的夹角为θ．若将F 沿水平方向和竖直方向分解，则其竖直方向的分力为（ ）A ．Fsin θB ．Fcos θC ．sin θFD ．cos F θ 20．两个小球从两个不同高度处自由下落，结果同时到达地面，如图所示四幅图中，能正确表示它们的运动的是（ ）A ．B ．C ．D ．二、多选题21．某升降机用绳子系着一个重物，以10 m/s 的速度匀速竖直上升，当到达40 m 高度时，绳子突然断开，重物从绳子断开到落地过程（不计空气阻力，重力加速度g 取10 m/s 2）（ ）A ．距地面的最大高度为45 mB ．在空中的运动时间为5 sC ．落地速度的大小为10 m/sD ．落地速度的大小为30 m/s22．如图所示，一根很长且不可伸长的柔软轻绳跨过光滑定滑轮，绳两端系着三个小球A 、B 、C ，三小球组成的系统保持静止，A 球质量为m ，B 球质量为3m ，C 球离地面高度为h ．现突然剪断A 球和B 球之间的绳子，不计空气阻力，三个小球均视为质点，则（ ）A．剪断绳子瞬间，A球的加速度为3 5 gB．剪断绳子瞬间，C球的加速度为gC．A球能上升的最大高度为2hD．A球能上升的最大高度为1.6h23．如图所示，一根粗细和质量分布均匀的细绳，两端各系一个质量都为m的小环，小环套在固定水平杆上，两环静止时，绳子过环与细绳结点P、Q的切线与竖直方向的夹角均为θ，已知绳子的质量也为m，重力加速度大小为g，则两环静止时A．每个环对杆的压力大小为mgB．绳子最低点处的弹力的大小为tan2 mgC．水平杆对每个环的摩擦力大小为mgtanθD．两环之间的距离增大，杆对环的摩擦力增大24．如图光滑水平面上放着两块长度相同，质量分别为M1和M2的木板，两木板的左端各放一个大小、形状、质量完全相同的物块，物块和木板间的动摩擦因数相同，开始时各物均静止．今在两物块上各作用一水平恒力F1、F2，当物块和木板分离时，两木板的速度分别为v1和v2．下列说法正确的是（）A．若F1>F2，M1=M2，则一定v1>v2B．若F1<F2，M1=M2，则一定v1>v2C．若F1=F2，M1<M2，则一定v1>v2D．若F1=F2，M1>M2，则一定v1>v225．汽车刹车后做匀减速直线运动，经3s后停止，对这一运动过程，下列说法正确的有()A．这连续三个1s的初速度之比为3:2:1B．这连续三个1s的平均速度之比为3:2:1C．这连续三个1s发生的位移之比为5:3:1D．这连续三个1s的速度改变量之比为1:1:1三、实验题26．同学们利用如图所示方法估测反应时间．首先，甲同学捏住直尺上端，使直尺保持竖直状态，直尺零刻度线位于乙同学的两指之间．当乙看见甲放开直尺时，立即用手指捏直尺，若捏住位置的刻度读数为x，则乙同学的反应时间为（重力加速度为g）．基于上述原理，某同学用直尺制作测量反应时间的工具，若测量范围为0～0.4s，则所用直尺的长度至少为 cm（g取10m/s2）；若以相等时间间隔在该直尺的另一面标记出表示反应时间的刻度线，则每个时间间隔在直尺上对应的长度是的（选填“相等”或“不相等”）.27．“验证力的平行四边形定则”的实验如图甲所示，其中A为固定橡条的图钉，P为橡皮条与细绳的结点，用两把互成角度的弹簧秤把结点P拉到位置O。
弹簧秤的示数为F1、F2，为单独用一根弹簧拉到O点时的读数，F是用平行四边形法则求出F1、F2的合力。
（1）为了更准确得到合力与分力的关系，要采用作力的______(填“图示”或“示意图”)来表示分力与合力；（2）图甲中左侧测力计读数是________N（3）图乙中方向一定沿AO方向的力是________(填“F ”或“F′”)。
28．用如图甲所示的装置做“验证力的平行四边形定则”的实验。
（1）某同学的实验操作如下，请完成相关内容。
①在桌面上放一方木板，在方木板上铺一张白纸，用图钉把白纸钉在方木板上。
②用图钉把橡皮条一端固定在A点，另一端系上两根细绳，细绳的另一端系有绳套。
③用两个弹簧测力计分别钩住绳套，互成角度地拉橡皮条，橡皮条伸长，使结点到达某一位置O，记下O点的位置，读出两个弹簧测力计的示数，并________。
④按选好的标度，用铅笔和刻度尺作出两个弹簧测力计的拉力F1和F2的图示，并用平行四边形定则求出合力F。
⑤只用一个弹簧测力计，通过细绳套把橡皮条的结点拉到同样的位置O，____，记下细绳的方向，按同一标度作出这个力F′的图示。
（2）某次实验中弹簧测力计的示数如图乙所示，则两弹簧测力计的拉力的大小分别为_________N、_____N。
（3）若两个弹簧测力计的读数分别为3.00N、4.00N，且两弹簧测力计拉力方向的夹角为锐角，则_____ (选填“能”或“不能”)用一个量程为5N的弹簧测力计测出它们的合力，理由是______。