2021-2022广东中考语法选择模拟题6篇(含答案)
【中考猜想】广东省2021-2022学年中考英语模拟精编试卷含答案
2021-2022学年中考英语模拟试卷注意事项1．考生要认真填写考场号和座位序号。
2．试题所有答案必须填涂或书写在答题卡上，在试卷上作答无效。
第一部分必须用2B 铅笔作答；第二部分必须用黑色字迹的签字笔作答。
3．考试结束后，考生须将试卷和答题卡放在桌面上，待监考员收回。
Ⅰ. 单项选择1、The more you smile, the ___________ you will feel.A．happy B．happier C．happily D．more happily2、--- Notre Dame de Paris, a symbol of European culture, was on fire last month.--- And this should be considered as a great to humans.A．past B．risk C．loss D．theft3、—I always feel ________ after lunch.—A cup of coffee may wake you up.A．sleepy B．hungry C．sad D．angry4、After working hard bit by bit for a long time，Tu Youyou won the Nobel Prize in her seventies. A．successfully B．widely C．especially D．rapidly5、— Are those crayons ?— No, aren’t.A．you; theirs B．your; their C．yours: they D．yours: them6、—Have you asked the policeman _______?—Yes. He told us to turn left onto Main Street. It’s on the right.A．if there is a bank near here B．how can we get to the nearest bankC．where can we find a bank D．when we can go to the nearest bank7、In every ________ there has to be some give-and-take.A．friendship B．instrument C．attention D．blackboard8、—Susan has bought a large house with a swimming pool.—It ________ be very expensive. I never dream about it.A．must B．might C．can’t D．s houldn’t9、We are going to take the high-speed train to Xi'an tomorrow, so an early arrival at the station____________ . A．advises B．is advised C．is advising D．was advised10、The fans was very excited because their favorite singer _________ during the evening party.A．put up B．stay up C．showed up D．dressed upⅡ. 完形填空11、完形填空（10小题，每小题1分，共10分）Once, there lived a man in the mountains. He had a statue made by a famous master. But the statue was put at his door, ___to the ground, because he didn't like it at all.One day, a man from the city ________by his house. This man was full of Knowledge. When he saw the statue, he asked the owner _________ he would sell it.The owner laughed and said, "Who will like this dull and ____ stone?"The man from the city said, "I will give you five dollars ______ it."The owner was surprised and ____. Then the statue was moved to the city.A few months later, the man from the mountains visited ______. When he walked around the streets, he saw many people _______ in front of a shop, and a man was shouting in a loud voice, "Come in and see the most wonderful statue in the world. Only one dollar __________ this most great work of a master."The man from the mountains 1 one dollar and walked into the shop. He was shocked by the thing in the shop, because it was the stat-ue that he himself had sold for five dollars.1．A．facing B．faced C．looks D．looked2．A．past B．passed C．passes D．passing3．A．how B．when C．who D．if4．A．clean B．dirty C．interesting D．sad5．A．for B．on C．of D．with6．A．disagreed B．agreed C．left D．cried7．A．streats B．shop C．village D．city8．A．standing B．stand C．to stand D．stood9．A．to enjoy B．enjoying C．to buy D．buying10．A．sold B．spent C．cost D．paidⅢ. 语法填空12、My mother is a doctor. She is so busy 1．she isn’t able to get back home on time every day. And she has to work on weekends sometimes. So it’s hard for 2．(she) to do all the chores after work. As a member of the family, I think it’s my duty to share some housework. Though mother always says she doesn’t need any h elp, there are always things I can do. For example, I can help take out the rubbish and wash 3．dishes. I’m sure I can do them 4．(good).What’s more, I’m 5．(try) to be independent. I wash my own clothes, tidy up my bedroom and care for my things. I’m old enough to do these things. And I can’t d6．on my parents forever.I think she is the 7．(one) person I should thank. So show your 8．(thank) to your mom for everything she 9．(do). Just try your b10．to help her. I believe she will feel happy. Try it now.Ⅳ. 阅读理解A13、Report CardName: James Smith Time: January 24th, 2015 Subjects Grades Comments(评语)English B＋Your reading and writing are good. But you have a strong accent(口音), so you are not good at speaking. And you do not put much effort into this subject. If you work hard, you can get a better grade in this subject.Physics A＋You are good at this subject. You are hard-working. I am glad that you do best in thissubject.Math CYou like this subject. But you are not good at this subject because you are a little lazy. Itis disappointing. You can do better if you try your best.Music BIt is a happy thing to hear you play the piano. You are crazy about music. Although youlike this subject best, your accent has a bad influence on your singing.1．The Report Card is from____________.A．Jame's school B．Jame's parents C．Jame's friend2．James got the best grade in ____________.A．physics B．math C．English3．Why did NOT James get the best grade in music?A．He was a little lazy.B．He didn't play the piano well.C．He had a strong accent.4．Which of the following is TRUE according to this passage?A．James doesn't like math.B．James studies hard in physics.C．James' speaking is good.5．From this passage, we know that ____________.A．James is a bad student.B．James had the exams on January 24th.C．studying hard can make one get good grades.B14、Finally HomeLast year, my parents moved to this town. I had to go to a new school and found no one to be friends with because I w asn’t interested in the topics most of my classmates liked.“Maybe I’ll never have real friends,” I thought.I closed my eyes and imagined playing my drums. Suddenly, I heard the sound of a guitar.I followed the sound and found out that was a band. I recognized the guitar player at my first sight and so did he.“Hey, you’re Cassie from my class!” his voice surprised me.“I’m sorry,” I said. “I just haven’t heard any live music in this town before! You sound great—did you guys write that song?”“Yeah—wel l, we’re still working on it. I’m Matt.” He stood up and held out his hand.“Mind if I listen in?” I asked in a low voice.“Not at all,” Matt said, smiling. “Maybe you can give us some suggestions!”The song was pretty good and I could really improve it with my drum skills. Behind my drum set was the one place I felt completely like myself. But I wasn’t sure if I wanted to open that door to the world.“Hey, do you play drums?” Matt asked suddenly.His question surprised me. How did he know? And then I followed his eyes to my hands, which had been beating a rhythm(节奏) on the floor. I tried to say no, but my heart stopped me from refusing. “Sure, I’ve been playing for a few years,” I said finally.“Oh, wow! Y ou’ve got to join us!” Matt said. “I have some drums over here.”I looked at their shiny faces. “Absolutely. I would love to play!” I replied.“One, two, three, four!” Matt counted and began singing, and I knew I was finally home.1．When the writer first went to a new school, she _____.A．joined a music club B．had no close friendsC．could play the guitar D．developed a new hobby2．How did the writer feel when Matt asked if she played drums?A．Surprised. B．Scared. C．Worried. D．Excited.3．The writer said she was finally home because______.A．she learned to play the drumsB．she decided to leave the townC．she loved her home very muchD．she made some friends finallyC15、The UK should start producing lab-grown meat to help solve the world’s food crisis (危机), according to a research group. A report by the Adam Smith Institute says meat made in a laboratory is better for the environment and would be cheaper than meat produced from farm animals.Need for meat around the world is expected to increase by 70% by the year 2050. So could people be eatinglab-grown meat in the future? Usually animals like cows are killed to produce the meat that people eat, but scientists have found a way to make meat in a laboratory without killing any animals.Animals are made up of cells (细胞). Scientists worked out how to take cells from an animal, like a cow, and multiply (繁殖) them in a dish. In the end from one tiny cell, tens of billions of cells can be grown. These join together to form meat.In 2013, the first hamburger grown this way was eaten in London. It took a year to produce and cost over £200,000 to make. Dr Mark Post, who created the world’s first hamburger from meat grown in a lab, told the BBC it “tastes exactly the same as the meat we know”. When two food critics (评论家) tried the burger in 2013, one sa id it was “close to meat” and another said it tasted like a real hamburger. It’s not just beef that is being created; companies are also working on other meat like turkey and chicken.The Adam Smith Institute says moving away from the present way meat is produced would help reduce greenhouse emissions (排放) by up to 96% and free up 99% of the land used in farming worldwide. They also think it will reduce chances of food poisoning (中毒) because the meat is grown under such controlled conditions. Jamie Hollywood from the Adam Smith Institute also told the BBC lab-grown meat could be a lot cheaper. He says the price has gone down in five years from £200,000 to £8, so in the future it could be even less.1．The main idea of Paragraph 3 is ______.A．what lab-grown meat is B．how lab-grown meat is madeC．what lab-grown meat tastes like D．when people can eat lab-grown meat2．The writer mentions two food critics in Paragraph 4 to show that ______.A．lab-grown meat is cheaperB．chicken meat can be made in the labC．lab-grown meat tastes similar to animal meatD．English people first tasted lab-grown meat3．The writer probably agrees that ______.A．lab-grown meat will cause a lot of problemsB．lab-grown meat tastes better than animal meatC．making lab-grown meat will cost too much moneyD．lab-grown meat can help solve the world’s food crisis4．Which of the following would be the best title for the passage?A．Could lab-grown meat be the future of food?B．What does lab-grown meat taste like?C．When could people eat lab-grown meat?D．What is lab-grown meat and how is it made?D16、I would almost rather see you dead, Robert S. Cassatt, a leading banker of Philadelphia, shouted when his twenty-year-old eldest daughter announced that she wanted to become an artist. In the 19th century, playing at drawing or painting on dishes was all right for a young lady, but serious work in art was not. And when the young lady’s family ranked (位列) among the best of Philadelphia’s social f amilies, such an idea could not even be considered.That was how Mary Cassatt, born in 1844, began her struggle as an artist. She did not fear before her father ’ s anger. Instead, she was against him with courage and at last made him change his mind. Mary Cassatt gave up her social position and all thought of a husband and a family, which was unthinkable for a young lady in those times. In the end, after long years of hard work and perseverance( 坚持), she became America’s most important woman artist and the internationally recognized leading woman painter of the time.1．What in fact was Mr. Cassatt’s main reason in opposing his daughter’s wish?A．Drawing and painting was simply unthinkable among ladies in those days.B．He did not believe his daughter wanted to work seriously in art.C．Ladies of good families simply did not become artists in those times.D．He believed an artist’s life would be too hard for his daughter.2．What made Mary Cassatt’s “fight” to become a leading artist especially hard?A．Her father was against her. B．She was a woman.C．She had no social position. D．She did not come from an artist’s family.3．What do we know about Mary Cassatt’s marriage?A．She never married because she did not want to be just a wife and mother.B．Her marriage failed because she never gave a thought to her husband and family.C．After marriage she decided to give up her husband rather than her career.D．She didn’t marry because for a lady of her social position to marry below her was unthinkable.E17、Do you know Weibo? Do you write a Weibo? If you don't, you are "out"! Weibo means microblog. People may spend muchtime writing a blog, but it takes a little time to write a microblog.Why? Because every message on a microblog is less than 140 words.Microblog started in the USA．It came to China in 2009 andit has developed very fast. In 2011, the number of Chinesemicro-bloggers grew to 300 million. Now, more and more people are interested in writing microblogs. For manymicroblog users, it is a great way of learning the freshest news,talking with friends and sharing different kinds of information, including news, daily life, pictures,music and so on. Many stars and famous people also write microblogs and share good things with theirfans.It is easy and fast to send a message on a microblog. However, this can also lead to problems and even cause panic . For example, when thebig earthquake and tsunami hit Japan in March, 2011, messages like " Salt can protectpeople from radiation" were hot on microblogs. It soon caused a crazy buying of salt. Later people realized it was just arumor (谣言).In a word, microblog plays a new role in the life of Chinese people.1．People spend _____ time and _____ words writing microblog.A．little, a few B．a little, few C．a little, a few D．a few, a little2．There were 300 million Chinesemicro-bloggersin _____.A．2008 B．2009 C．2011 D．20133．Which of the following is TRUE?A．Writing a microblog needs a special training.B．Microblog appeared in China only one year ago but it has developed rapidly.C．As a popular thing, microblog has its advantages and disadvantages.D．More and more Chinese show great interest in microblog because it started in the USA．F18、Welcome to our idiom (习语) corner!1．Picture _____ can be chosen to express “to do something without thinking”.A．B．C．D．2．We can’t believe Robert won this watch. He’s really _______.A．a walking man B．a trigger C．a dark horse D．an egg3．The Chinese meaning to the idiom “to walk on air” is probably “________”.A．一无所有B．欢天喜地C．愁眉苦脸D．不假思索4．The writer didn’t use _______ to help the readers understand the idioms above.A．explanations (解释) B．pictures C．examples D．resultsⅤ.书面表达19、书面表达你的好朋友戴尔在学习英语过程中遇到很多问题，比如：单词记忆、句型的运用、阅读文章等一系列问题。
2021-2022学年广东省东莞市石碣镇中考考前最后一卷数学试卷含解析
2021-2022中考数学模拟试卷考生请注意：1．答题前请将考场、试室号、座位号、考生号、姓名写在试卷密封线内，不得在试卷上作任何标记。
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一、选择题（共10小题，每小题3分，共30分）1．如图，用一个半径为6cm的定滑轮带动重物上升，假设绳索（粗细不计）与滑轮之间没有滑动，绳索端点G向下移动了3πcm，则滑轮上的点F旋转了（）A．60°B．90°C．120°D．45°2．下列计算正确的是A．a2·a2＝2a4B．(－a2)3＝－a6C．3a2－6a2＝3a2D．(a－2)2＝a2－43．如表记录了甲、乙、丙、丁四名跳高运动员最近几次选拔赛成绩的平均数与方差：甲乙丙丁平均数（cm）185 180 185 180方差 3.6 3.6 7.4 8.1根据表数据，从中选择一名成绩好且发挥稳定的参加比赛，应该选择（）A．甲B．乙C．丙D．丁4．如图，平面直角坐标系xOy中，四边形OABC的边OA在x轴正半轴上，BC∥x轴，∠OAB＝90°，点C（3，2），连接OC．以OC为对称轴将OA翻折到OA′，反比例函数y＝kx的图象恰好经过点A′、B，则k的值是（）A．9 B．133C．16915D．35．如图，PA，PB分别与⊙O相切于A，B两点，若∠C＝65°，则∠P的度数为()A．65°B．130°C．50°D．100°6．在一个直角三角形中，有一个锐角等于45°，则另一个锐角的度数是（）A．75°B．60°C．45°D．30°7．如图，在△ABC中，AB=AC=5，BC=6，点M为BC的中点，MN⊥AC于点N，则MN等于（）A．125B．95C．65D．1658．如图，平行四边形ABCD的对角线AC、BD相交于点O，AE平分∠BAD，分别交BC、BD于点E、P，连接OE，∠ADC=60°，AB=12BC=1，则下列结论：①∠CAD=30°②BD=7③S平行四边形ABCD=AB•AC④OE=14AD⑤S△APO=312，正确的个数是（）A．2 B．3 C．4 D．59．如图是将正方体切去一个角后形成的几何体，则该几何体的左视图为()A．B．C．D．10．不等式3x＜2（x+2）的解是（）A．x＞2 B．x＜2 C．x＞4 D．x＜4二、填空题（本大题共6个小题，每小题3分，共18分）11．钓鱼岛周围海域面积约为170000平方千米，170000用科学记数法表示为______．12．当关于x的一元二次方程ax2+bx+c＝0有实数根，且其中一个根为另一个根的2倍时，称之为“倍根方程”．如果关于x的一元二次方程x2+（m﹣2）x﹣2m＝0是“倍根方程”，那么m的值为_____．13．如图，在矩形ABCD中，对角线BD的长为1，点P是线段BD上的一点，联结CP，将△BCP沿着直线CP翻折，若点B落在边AD上的点E处，且EP//AB，则AB的长等于________．14．如图，已知⊙O是△ABD的外接圆，AB是⊙O的直径，CD是⊙O的弦，∠ABD=58°，则∠BCD的度数是_____．15．如图，一组平行横格线，其相邻横格线间的距离都相等，已知点A、B、C、D、O都在横格线上，且线段AD，BC交于点O，则AB：CD等于______．16．在ABCD中，AB=3，BC=4，当ABCD的面积最大时，下列结论：①AC=5；②∠A+∠C=180o；③AC⊥BD；④AC=BD．其中正确的有_________．（填序号）三、解答题（共8题，共72分）17．（8分）经过江汉平原的沪蓉（上海﹣成都）高速铁路即将动工．工程需要测量汉江某一段的宽度．如图①，一测量员在江岸边的A处测得对岸岸边的一根标杆B在它的正北方向，测量员从A点开始沿岸边向正东方向前进100米到达点C处，测得∠ACB=68°．（1）求所测之处江的宽度（sin68°≈0.93，cos68°≈0.37，tan68°≈2.1．）；（2）除（1）的测量方案外，请你再设计一种测量江宽的方案，并在图②中画出图形．（不用考虑计算问题，叙述清楚即可）18．（8分）如图，已知在Rt ABC 中，90C ∠=︒，AD 是BAC ∠的平分线．（1）作一个O 使它经过A D 、两点，且圆心O 在AB 边上；（不写作法，保留作图痕迹）（2）判断直线BC 与O 的位置关系，并说明理由．19．（8分）某企业为杭州计算机产业基地提供电脑配件．受美元走低的影响，从去年1至9月，该配件的原材料价格一路攀升，每件配件的原材料价格y 1（元）与月份x （1≤x≤9，且x 取整数）之间的函数关系如下表： 月份x1 2 3 4 5 6 7 8 9 价格y 1（元/件）560580600620640660680700720随着国家调控措施的出台，原材料价格的涨势趋缓，10至12月每件配件的原材料价格y 2（元）与月份x （10≤x≤12，且x 取整数）之间存在如图所示的变化趋势：（1）请观察题中的表格，用所学过的一次函数、反比例函数或二次函数的有关知识，直接写出y 1 与x 之间的函数关系式，根据如图所示的变化趋势，直接写出y 2与x 之间满足的一次函数关系式；（2）若去年该配件每件的售价为1000元，生产每件配件的人力成本为50元，其它成本30元，该配件在1至9月的销售量p 1（万件）与月份x 满足关系式p 1=0.1x+1.1（1≤x≤9，且x 取整数），10至12月的销售量p 2（万件）p 2=﹣0.1x+2.9（10≤x≤12，且x 取整数）．求去年哪个月销售该配件的利润最大，并求出这个最大利润．20．（8分）综合与实践﹣﹣﹣折叠中的数学在学习完特殊的平行四边形之后，某学习小组针对矩形中的折叠问题进行了研究．问题背景：在矩形ABCD中，点E、F分别是BC、AD 上的动点，且BE=DF，连接EF，将矩形ABCD沿EF折叠，点C落在点C′处，点D落在点D′处，射线EC′与射线DA相交于点M．猜想与证明：（1）如图1，当EC′与线段AD交于点M时，判断△MEF的形状并证明你的结论；操作与画图：（2）当点M与点A重合时，请在图2中作出此时的折痕EF和折叠后的图形（要求：尺规作图，不写作法，保留作图痕迹，标注相应的字母）；操作与探究：（3）如图3，当点M在线段DA延长线上时，线段C′D'分别与AD，AB交于P，N两点时，C′E与AB交于点Q，连接MN 并延长MN交EF于点O．求证：MO⊥EF 且MO平分EF；（4）若AB=4，AD=43，在点E由点B运动到点C的过程中，点D'所经过的路径的长为．21．（8分）在正方形ABCD中，AB＝4cm，AC为对角线，AC上有一动点P，M是AB边的中点，连接PM、PB，设A、P两点间的距离为xcm，PM＋PB长度为ycm.小东根据学习函数的经验，对函数y随自变量x的变化而变化的规律进行了探究.下面是小东的探究过程，请补充完整：（1）通过取点、画图、测量，得到了x与y的几组值，如表：x/cm 0 1 2 3 4 5 y/cm6.04.84.56.07.4（说明：补全表格时相关数值保留一位小数）（2）建立平面直角坐标系，描出以补全后的表中各对对应值为坐标的点，画出该函数的图象. （3）结合画出的函数图象，解决问题：PM ＋PB 的长度最小值约为______cm .22．（10分）如图1，2分别是某款篮球架的实物图与示意图，已知底座BC=0.60米，底座BC 与支架AC 所成的角∠ACB=75°，支架AF 的长为2.50米米，篮板顶端F 点到篮框D 的距离FD=1.35米，篮板底部支架HF 与支架AF 所成的角∠FHE=60°，求篮框D 到地面的距离（精确到0.01米）.（参考数据：cos75°≈0.2588， sin75°≈0.9659，tan75°≈3.732，3 1.732≈，2 1.414≈）23．（12分）为缓解交通压力，市郊某地正在修建地铁站，拟同步修建地下停车库．如图是停车库坡道入口的设计图，其中MN 是水平线，MN ∥AD ，AD ⊥DE ，CF ⊥AB ，垂足分别为D ，F ，坡道AB 的坡度＝1：3，AD ＝9米，点C 在DE 上，CD ＝0.5米，CD 是限高标志牌的高度（标志牌上写有：限高 米）．如果进入该车库车辆的高度不能超过线段CF 的长，则该停车库限高多少米？（结果精确到0.1米，参考数据：2≈1.41，3≈1.73，10≈3.16）24．（1）如图1，在矩形ABCD 中，AB ＝2，BC ＝5，∠MPN ＝90°，且∠MPN 的直角顶点在BC 边上，BP ＝1．①特殊情形：若MP 过点A ，NP 过点D ，则PAPD＝ ． ②类比探究：如图2，将∠MPN 绕点P 按逆时针方向旋转，使PM 交AB 边于点E ，PN 交AD 边于点F ，当点E 与点B 重合时，停止旋转．在旋转过程中，PEPF的值是否为定值？若是，请求出该定值；若不是，请说明理由． （2）拓展探究：在Rt △ABC 中，∠ABC ＝90°，AB ＝BC ＝2，AD ⊥AB ，⊙A 的半径为1，点E 是⊙A 上一动点，CF ⊥CE 交AD 于点F ．请直接写出当△AEB 为直角三角形时ECFC的值． 参考答案一、选择题（共10小题，每小题3分，共30分） 1、B 【解析】由弧长的计算公式可得答案. 【详解】解：由圆弧长计算公式l=180n r,将l=3π代入, 可得n =90o ， 故选B. 【点睛】本题主要考查圆弧长计算公式l=180n r，牢记并运用公式是解题的关键. 2、B【解析】【分析】根据同底数幂乘法、幂的乘方、合并同类项法则、完全平方公式逐项进行计算即可得. 【详解】A. a 2·a 2＝a 4 ，故A 选项错误； B. (－a 2)3＝－a 6 ，正确；C. 3a 2－6a 2＝-3a 2 ，故C 选项错误；D. (a －2)2＝a 2－4a+4，故D 选项错误， 故选B.【点睛】本题考查了同底数幂的乘法、幂的乘方、合并同类项、完全平方公式，熟练掌握各运算的运算法则是解题的关键.3、A 【解析】首先比较平均数，平均数相同时选择方差较小的运动员参加． 【详解】∵x 甲=x 丙>x 乙=x 丁，∴从甲和丙中选择一人参加比赛， ∵2S 甲=2S 乙<2S 丙<2S 丁， ∴选择甲参赛， 故选A ． 【点睛】此题主要考查了平均数和方差的应用，解题关键是明确平均数越高，成绩越高，方差越小，成绩越稳定. 4、C 【解析】设B （2k，2），由翻折知OC 垂直平分AA′，A′G ＝2EF ，AG ＝2AF ，由勾股定理得OC 锐角三角函数可求得A′（526，613），根据反比例函数性质k ＝xy 建立方程求k ．【详解】如图，过点C 作CD ⊥x 轴于D ，过点A′作A′G ⊥x 轴于G ，连接AA′交射线OC 于E ，过E 作EF ⊥x 轴于F ，设B （2k，2）， 在Rt △OCD 中，OD ＝3，CD ＝2，∠ODC ＝90°， ∴OC 222232OD CD +=+13 由翻折得，AA′⊥OC ，A′E ＝AE ，∴sin ∠COD ＝AE CDOA OC=， ∴AE ＝21321313k CD OA k OC ⨯⋅==，∵∠OAE+∠AOE ＝90°，∠OCD+∠AOE ＝90°， ∴∠OAE ＝∠OCD ， ∴sin ∠OAE ＝EF ODAE OC=＝sin ∠OCD ， ∴EF ＝1331313OD AE k OC ⋅==， ∵cos ∠OAE ＝AF CDAE OC=＝cos ∠OCD ， ∴1321313CD AF AE k OC =⋅=， ∵EF ⊥x 轴，A′G ⊥x 轴， ∴EF ∥A′G ，∴12EF AF AE A G AG AA ===''， ∴6213A G EF k '==，4213AG AF k ==，∴14521326OG OA AG k k k =-=-=， ∴A′（526k ，613k ），∴562613k k k ⋅=， ∵k≠0，∴169=15 k，故选C．【点睛】本题是反比例函数综合题，常作为考试题中选择题压轴题，考查了反比例函数点的坐标特征、相似三角形、翻折等，解题关键是通过设点B的坐标，表示出点A′的坐标．5、C【解析】试题分析：∵PA、PB是⊙O的切线，∴OA⊥AP，OB⊥BP，∴∠OAP=∠OBP=90°，又∵∠AOB=2∠C=130°，则∠P=360°﹣（90°+90°+130°）=50°．故选C．考点：切线的性质．6、C【解析】根据直角三角形两锐角互余即可解决问题.【详解】解：∵直角三角形两锐角互余，∴另一个锐角的度数=90°﹣45°=45°，故选C．【点睛】本题考查直角三角形的性质，记住直角三角形两锐角互余是解题的关键．7、A【解析】连接AM，根据等腰三角形三线合一的性质得到AM⊥BC，根据勾股定理求得AM的长，再根据在直角三角形的面积公式即可求得MN的长．【详解】解：连接AM，∵AB=AC，点M为BC中点，∴AM⊥CM（三线合一），BM=CM，∵AB=AC=5，BC=6，∴BM=CM=3，在Rt△ABM中，AB=5，BM=3，∴根据勾股定理得：AM===4，又S△AMC=12MN•AC=12AM•MC，∴MN=·AM CM AC= 125．故选A．【点睛】综合运用等腰三角形的三线合一，勾股定理．特别注意结论：直角三角形斜边上的高等于两条直角边的乘积除以斜边．8、D【解析】①先根据角平分线和平行得：∠BAE=∠BEA，则AB=BE=1，由有一个角是60度的等腰三角形是等边三角形得：△ABE 是等边三角形，由外角的性质和等腰三角形的性质得：∠ACE=30°，最后由平行线的性质可作判断；②先根据三角形中位线定理得：OE=12AB=12，OE∥AB，根据勾股定理计算2=和OD的长，可得BD的长；③因为∠BAC=90°，根据平行四边形的面积公式可作判断；④根据三角形中位线定理可作判断；⑤根据同高三角形面积的比等于对应底边的比可得：S△AOE=S△EOC=12，12POEAOPSS=，代入可得结论．【详解】①∵AE平分∠BAD，∴∠BAE=∠DAE，∵四边形ABCD是平行四边形，∴AD∥BC，∠ABC=∠ADC=60°，∴∠DAE=∠BEA，∴∠BAE=∠BEA，∴AB=BE=1，∴△ABE是等边三角形，∴AE=BE=1，∵BC=2，∴EC=1，∴AE=EC，∴∠EAC=∠ACE，∵∠AEB=∠EAC+∠ACE=60°，∴∠ACE=30°，∵AD∥BC，∴∠CAD=∠ACE=30°，故①正确；②∵BE=EC，OA=OC，∴OE=12AB=12，OE∥AB，∴∠EOC=∠BAC=60°+30°=90°，Rt△EOC中，2=，∵四边形ABCD是平行四边形，∴∠BCD=∠BAD=120°，∴∠ACB=30°，∴∠ACD=90°，Rt△OCD中，2=，∴，故②正确；③由②知：∠BAC=90°，∴S▱ABCD=AB•AC，故③正确；④由②知：OE是△ABC的中位线，1∴OE=12AB=14AD，故④正确；⑤∵四边形ABCD是平行四边形，∴∴S△AOE=S△EOC=12OE•OC=12×12=，∵OE∥AB，∴12 EP OEAP AB==，∴12POEAOPSS=，∴S△AOP=23S△AOE=238⨯12，故⑤正确；本题正确的有：①②③④⑤，5个，故选D．【点睛】本题考查了平行四边形的性质、等腰三角形的性质、直角三角形30度角的性质、三角形面积和平行四边形面积的计算；熟练掌握平行四边形的性质，证明△ABE是等边三角形是解决问题的关键，并熟练掌握同高三角形面积的关系．9、C【解析】看到的棱用实线体现.故选C.10、D【解析】不等式先展开再移项即可解答.【详解】解：不等式3x＜2（x+2），展开得：3x＜2x+4，移项得：3x-2x＜4，解之得：x＜4.故答案选D.【点睛】本题考查了解一元一次不等式，解题的关键是熟练的掌握解一元一次不等式的步骤.二、填空题（本大题共6个小题，每小题3分，共18分）11、51.710⨯【解析】解：将170000用科学记数法表示为：1.7×1．故答案为1.7×1． 12、-1或-4【解析】分析：设“倍根方程”2(2)20x m x m +--=的一个根为α，则另一根为2α，由一元二次方程根与系数的关系可得2(2)?22m m αααα+=--⋅=-，，由此可列出关于m 的方程，解方程即可求得m 的值.详解：由题意设“倍根方程”2(2)20x m x m +--=的一个根为α，另一根为2α，则由一元二次方程根与系数的关系可得： 2(2)?22m m αααα+=--⋅=-，， ∴223m m αα-=-=-，， ∴22()3m m --=-， 化简整理得：2540m m ++=，解得 1241m m =-=-，.故答案为：-1或-4.点睛：本题解题的关键是熟悉一元二次方程根与系数的关系：若一元二次方程2(0)0 ax bx c a ++=≠的两根分别为αβ、，则 b c a a αβαβ+=-=，.13 【解析】设CD=AB=a ，利用勾股定理可得到Rt △CDE 中，DE 2=CE 2-CD 2=1-2a 2，Rt △DEP 中，DE 2=PD 2-PE 2=1-2PE ，进而得出PE=a 2，再根据△DEP ∽△DAB ，即可得到PE PD AB BD =，即11PE PE a -=，可得2211a a a -=，即可得到AB 的长等．【详解】如图，设CD=AB=a ，则BC 2=BD 2-CD 2=1-a 2，由折叠可得，CE=BC ，BP=EP ，∴CE 2=1-a 2，∴Rt △CDE 中，DE 2=CE 2-CD 2=1-2a 2，∵PE ∥AB ，∠A=90°，∴∠PED=90°，∴Rt △DEP 中，DE 2=PD 2-PE 2=（1-PE ）2-PE 2=1-2PE ，∴PE=a 2，∵PE ∥AB ，∴△DEP ∽△DAB ， ∴PE PD AB BD =，即11PE PE a -=， ∴2211a a a -=， 即a 2+a-1=0， 解得125151a a ---==（舍去）， ∴AB 的长等于51-. 故答案为512. 14、32°【解析】 根据直径所对的圆周角是直角得到∠ADB =90°，求出∠A 的度数，根据圆周角定理解答即可．【详解】∴∠ADB=90°，∵∠ABD=58°，∴∠A=32°，∴∠BCD=32°，故答案为32°．15、2：1．【解析】过点O作OE⊥AB于点E，延长EO交CD于点F，可得OF⊥CD，由AB//CD，可得△AOB∽△DOC，根据相似三角形对应高的比等于相似比可得AB OECD OF=，由此即可求得答案.【详解】如图，过点O作OE⊥AB于点E，延长EO交CD于点F，∵AB//CD，∴∠OFD=∠OEA=90°，即OF⊥CD，∵AB//CD，∴△AOB∽△DOC，又∵OE⊥AB，OF⊥CD，练习本中的横格线都平行，且相邻两条横格线间的距离都相等，∴AB OECD OF==23，故答案为：2：1．【点睛】本题考查了相似三角形的的判定与性质，熟练掌握相似三角形对应高的比等于相似比是解本题的关键.16、①②④【解析】由当ABCD的面积最大时，AB⊥BC，可判定ABCD是矩形，由矩形的性质，可得②④正确，③错误，又由勾股定理求得AC=1．【详解】∵当ABCD的面积最大时，AB⊥BC，∴∠A =∠C =90°，AC =BD ，故③错误，④正确；∴∠A +∠C =180°；故②正确；∴AC==1，故①正确．故答案为：①②④．【点睛】此题考查了平行四边形的性质、矩形的判定与性质以及勾股定理．注意证得▱ABCD 是矩形是解此题的关键．三、解答题（共8题，共72分）17、 (1)21米（2）见解析【解析】试题分析：（1）根据题意易发现，直角三角形ABC 中，已知AC 的长度，又知道了∠ACB 的度数，那么AB 的长就不难求出了．（2）从所画出的图形中可以看出是利用三角形全等、三角形相似、解直角三角形的知识来解决问题的．解：（1）在Rt △BAC 中，∠ACB=68°，∴AB=AC•tan68°≈100×2.1=21（米）答：所测之处江的宽度约为21米．（2）①延长BA 至C ，测得AC 做记录；②从C 沿平行于河岸的方向走到D ，测得CD ，做记录；③测AE ，做记录．根据△BAE ∽△BCD ，得到比例线段，从而解答18、（1）见解析；（2）BC 与O 相切，理由见解析． 【解析】（1）作出AD 的垂直平分线，交AB 于点O ，进而利用AO 为半径求出即可；（2）利用半径相等结合角平分线的性质得出OD ∥AC ，进而求出OD ⊥BC ，进而得出答案．【详解】（1）①分别以A D 、为圆心，大于12AD 的长为半径作弧，两弧相交于点E 和F ， ②作直线EF ，与AB 相交于点O ，③以O为圆心，OA为半径作圆，如图即为所作；（2）BC与O相切，理由如下：连接OD，OA OD为O半径，,∴=，OA OD∴是等腰三角形，AOD∴，OAD ODA∠=∠AD平分BAC∠，∴∠=∠，CAD OAD∴∠=∠，CAD ODA∴，AC OD∠=︒，C90∴∠=︒，ODB90∴⊥，OD BCOD为O半径，∴与O相切．BC【点睛】本题主要考查了切线的判定以及线段垂直平分线的作法与性质等知识，掌握切线的判定方法是解题关键．19、（1）y1=20x+540，y2=10x+1；（2）去年4月销售该配件的利润最大，最大利润为450万元．【解析】（1）利用待定系数法，结合图象上点的坐标求出一次函数解析式即可；（2）根据生产每件配件的人力成本为50元，其它成本30元，以及售价销量进而求出最大利润．【详解】（1）利用表格得出函数关系是一次函数关系：设y=kx+b，∴560 2580, k bk b+=⎧⎨+=⎩解得：20540, kb=⎧⎨=⎩∴y1=20x+540，利用图象得出函数关系是一次函数关系：设y2=ax+c，∴10730 12750,a ca c+=⎧⎨+=⎩解得：10630, ac=⎧⎨=⎩∴y2=10x+1．（2）去年1至9月时，销售该配件的利润w=p1（1000﹣50﹣30﹣y1），=（0.1x+1.1）（1000﹣50﹣30﹣20x﹣540）=﹣2x2+16x+418，=﹣2（x﹣4）2+450，（1≤x≤9，且x取整数）∵﹣2＜0，1≤x≤9，∴当x=4时，w最大=450（万元）；去年10至12月时，销售该配件的利润w=p2（1000﹣50﹣30﹣y2）=（﹣0.1x+2.9）（1000﹣50﹣30﹣10x﹣1），=（x﹣29）2，（10≤x≤12，且x取整数），∵10≤x≤12时，∴当x=10时，w最大=361（万元），∵450＞361，∴去年4月销售该配件的利润最大，最大利润为450万元．【点睛】此题主要考查了一次函数的应用，根据已知得出函数关系式以及利用函数增减性得出函数最值是解题关键．20、（1）△MEF是等腰三角形（2）见解析（3）证明见解析（4）16 3π【解析】（1）由AD∥BC，可得∠MFE＝∠CEF，由折叠可得，∠MEF＝∠CEF，依据∠MFE＝∠MEF，即可得到ME＝MF，进而得出△MEF是等腰三角形；（2）作AC的垂直平分线，即可得到折痕EF，依据轴对称的性质，即可得到D'的位置；（3）依据△BEQ≌△D'FP，可得PF＝QE，依据△NC'P≌△NAP，可得AN＝C'N，依据Rt△MC'N≌Rt△MAN，可得∠AMN＝∠C'MN，进而得到△MEF是等腰三角形，依据三线合一，即可得到MO⊥EF 且MO平分EF；【详解】（1）△MEF 是等腰三角形．理由：∵四边形ABCD 是矩形，∴AD ∥BC ，∴∠MFE=∠CEF ，由折叠可得，∠MEF=∠CEF ，∴∠MFE=∠MEF ，∴ME=MF ，∴△MEF 是等腰三角形．（2）折痕EF 和折叠后的图形如图所示：（3）如图，∵FD=BE ，由折叠可得，D'F=DF ，∴BE=D'F ，在△NC'Q 和△NAP 中，∠C'NQ=∠ANP ，∠NC'Q=∠NAP=90°， ∴∠C'QN=∠APN ，∵∠C'QN=∠BQE ，∠APN=∠D'PF ，∴∠BQE=∠D'PF ，在△BEQ 和△D'FP 中，{BQE DPFBE D F AP C Q∠=∠='='，∴PF=QE ，∵四边形ABCD 是矩形，∴AD=BC ，∴AD ﹣FD=BC ﹣BE ，∴AF=CE ，由折叠可得，C'E=EC ，∴AF=C'E ，∴AP=C'Q ，在△NC'Q 和△NAP 中，{C NQ ANPNC Q NAP AP C Q''∠∠=∠='∠=，∴△NC'P ≌△NAP （AAS ），∴AN=C'N ，在Rt △MC'N 和Rt △MAN 中，{MN MN AN C N=='， ∴Rt △MC'N ≌Rt △MAN （HL ），∴∠AMN=∠C'MN ，由折叠可得，∠C'EF=∠CEF ，∵四边形ABCD 是矩形，∴AD ∥BC ，∴∠AFE=∠FEC ，∴∠C'EF=∠AFE ，∴ME=MF ，∴△MEF 是等腰三角形，∴MO ⊥EF 且MO 平分EF ；（4）在点E 由点B 运动到点C 的过程中，点D'所经过的路径是以O 为圆心，4为半径，圆心角为240°的扇形的弧，如图：故其长为L=2404161803ππ⨯⨯=． 故答案为163π． 【点睛】此题是四边形综合题，主要考查了折叠问题与菱形的判定与性质、弧长计算公式，等腰三角形的判定与性质以及全等三角形的判定与性质的综合应用，熟练掌握等腰三角形的判定定理和性质定理是解本题的关键．21、（1）2.1；（2）见解析；（3）x ＝2时，函数有最小值y ＝4.2【解析】（1）通过作辅助线，应用三角函数可求得HM +HN 的值即为x =2时，y 的值；（2）可在网格图中直接画出函数图象；（3）由函数图象可知函数的最小值．【详解】（1）当点P 运动到点H 时，AH =3，作HN ⊥AB 于点N ．∵在正方形ABCD 中，AB =4cm ，AC 为对角线，AC 上有一动点P ，M 是AB 边的中点，∴∠HAN =42°，∴AN =HN =AH •sin42°=3232=，∴HM 22()HN AN AM =+-，HB 22()HN AB AN =+-∴HM +HN 222232323232()(2)()(4)2222+-+-136225122-- 4.5168.032≈2.122+2.834≈2.1．故答案为：2.1；（2）（3）根据函数图象可知，当x=2时，函数有最小值y=4.2．故答案为：4.2．【点睛】本题考查了二次函数的应用，解答本题的关键是明确题意，找出所求问题需要的条件，利用数形结合的思想解答．22、3.05米.【解析】延长FE交CB的延长线于M，过A作AG⊥FM于G，解直角三角形即可得到结论．【详解】延长FE交CB的延长线于M，过A作AG⊥FM于G，在Rt△ABC中，tan∠ACB=AB BC，∴AB=BC•tan75°=0.60×3.732=2.2392，∴GM=AB=2.2392，在Rt△AGF中，∵∠FAG=∠FHD=60°，sin∠FAG=FG AF，∴sin60°=3 2.52 FG，∴FG=2.165，∴DM=FG+GM﹣DF≈3.05米．答：篮框D到地面的距离是3.05米．考点：解直角三角形的应用．23、2.1．【解析】据题意得出tanB =13, 即可得出tanA, 在Rt△ADE中, 根据勾股定理可求得DE, 即可得出∠FCE的正切值, 再在Rt△CEF中, 设EF=x,即可求出x, 从而得出CF=1x的长. 【详解】解：据题意得tanB=，∵MN∥AD，∴∠A=∠B，∴tanA=，∵DE⊥AD，∴在Rt△ADE中，tanA=，∵AD=9，∴DE=1，又∵DC=0.5，∴CE=2.5，∵CF ⊥AB ，∴∠FCE+∠CEF=90°，∵DE ⊥AD ，∴∠A+∠CEF=90°，∴∠A=∠FCE ，∴tan ∠FCE=在Rt △CEF 中，CE 2=EF 2+CF 2设EF=x ，CF=1x （x ＞0），CE=2.5， 代入得（）2=x 2+（1x ）2解得x=（如果前面没有“设x ＞0”，则此处应“x=±，舍负”），∴CF=1x=≈2.1， ∴该停车库限高2.1米．【点睛】点评: 本题考查了解直角三角形的应用, 坡面坡角问题和勾股定理, 解题的关键是坡度等于坡角的正切值. 24、 (1) ①特殊情形：12；②类比探究: 12PE PF = 是定值，理由见解析;(2) EC 4FC =或314+ 【解析】（1）证明Rt ABP Rt CDP ∽，即可求解；（2）点E 与点B 重合时，四边形EBFA 为矩形，即可求解；（3）分AEB 90∠︒＝时、EAB 90∠︒＝时，两种情况分别求解即可．【详解】解：（1）APB DPC 90DPC PDC 90＝，＝∠∠∠∠+︒+︒，APB PDC ∠∠∴＝，Rt ABP Rt CDP ∴∽， 21512PA AB PD CP ∴===-， 故答案为12； （2）点E 与点B 重合时，四边形EBFA 为矩形，则PE 1PF 2=为定值； （3）①当AEB 90∠︒＝时，如图3，过点E 、F 分别作直线BC 的垂线交于点G ，H ，由（1）知：ECB CFH α＝＝∠∠，AB 2AE 1ABE 30∠︒＝，＝，则＝，EB ABcos303︒则＝＝，3cos 602GB EB ︒==，同理32EG =， 322cos cos 2GC EC FH AB αα+==== . 则FH 2cos cos FC αα==， 则314EC FC =+ ； ②当EAB 90∠︒＝时，如图4，GB EA 1EG FH AB 2＝＝，＝＝＝，则BE 5GC 3＝，＝，22EG G 13EC C =+=EG 2tan tanGC 3EGC α∠===，则cos α=FH cos FC α==， 则4EC FC= ，故EC 4FC =或1 ． 【点睛】本题考查的圆知识的综合运用，涉及到解直角三角形的基本知识，其中（3），要注意分类求解，避免遗漏．。
2021-2022学年广东省广州市广州大附属中学中考英语全真模拟试卷含答案
2021-2022学年中考英语模拟试卷注意事项1．考生要认真填写考场号和座位序号。
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第一部分必须用2B 铅笔作答；第二部分必须用黑色字迹的签字笔作答。
3．考试结束后，考生须将试卷和答题卡放在桌面上，待监考员收回。
Ⅰ. 单项选择1、Music is the only thing ______ can help me to relax after a long day of hard work.A．which B．that C．who2、—______ interesting the storybook is!—Yes, I have read it twice.A．What B．What anC．How D．How an3、In the following words, which underlined letter has a different sound from the others?A．agree B．alien C．ahead4、—It’s said that shopping online is safe.—. You’d better be careful.A．I think so B．No problem C．That depends5、Cindy, did you watch the Airshow （航展）2018 on TV?You mean the one that _______in Zhuhai? Of course I did!A．held B．is held C．was held6、—Well done! Y ou did very well in the final exam. Could you please tell me ________?—Sure. I listened to the teacher carefully and did lots of exercises.A．which is the best way to improve my gradeB．how did you deal with to get the good marksC．what you did to get the good marks7、— I c annot find my wallet. I think I’ve lost .—Y ou’d better ask the Lost and Found for help.A．one B．it C．this8、---Have a cup of coffee, please. ---Thank you. How nice the coffee !A．feels B．looks C．smells D．sounds9、— Can you remember Mr. Zhang came yesterday？— Y es, I can. He came by car.A．why B．when C．how10、—He ____be in the classroom, I think.—No, he_____ be in the classroom. I saw him go home a minute ago.A．can, may not B．must, may not C．may, can’t D．may, mustn’tⅡ. 完形填空11、" Everything happens for the best. " Whenever I was sad, my mother would say this to me.After I graduated from 1 in 1932, I decided to find a job in radio as a sports announcer(广播员). I went to Chicago and knocked at the door of every station. Bu 2 , I was refused every time.At one station, a kind lady told me that 3 stations wouldn't allow an inexperienced person and 4 that I trymy luck at smaller stations. Later, my father said a newly—opened store wanted a local athlete to work for it. I applied for the job , but I was refused 5"Everything happens for the best, " Mom 6 me. Dad offered me the car to look for a job. I tried WOC Radio in Davenport and failed.As I left his office, I was 7 . "How can I become a sports announcer if I can't get a job in a radio station?" I asked aloud.While I was waiting for the elevator, I heard someone 8 It was MacArthur. "What was that you said about 9 ? Do you know anything about football? "Then he asked me to broadcast an imaginary(想象的) game 10 my performance, he offered me a chance to work there.On my way home, I thought of my mother's words, "lf you carry on, one day something good will happen. " 1．A．family B．office C．college D．bank2．A．exactly B．usually C．unluckily D．differently3．A．small B．big C．old D．new4．A．suggested B．asked C．considered D．agreed5．A．more B．again C．already D．finally6．A．reminded B．asked C．said D．bought7．A．sad B．happy C．kind D．hopeful8．A．singing B．laughing C．calling D．crying9．A．stations B．food C．cars D．stops10．A．Frustrated by B．Pleased with C．Worried about D．Surprised atⅢ. 语法填空12、综合填空。
2022年广东省深圳市(初三学业水平考试)中考道德与法治真题试卷含详解
2021-2022年深圳市初中学业水平考试道德与法治1.青春如诗，岁月如歌。
初中生活是丰富多彩的，三年的点点滴滴见证了我们的成长，也承载着对未来的期盼。
因此，我们应该（）A.激发潜能，不断超越自我B.顺其自然，生活随遇而安C.标新立异，创造生命价值D.调适心态，享受当下青春2.以下是2021年全国成年国民阅读形式调查结果，请判断以下说法哪个是正确的（）A.阅读伴随成长，手机阅读成为最多选择B.学习点亮明灯，国民学习习惯已经养成C.方法催生成功，方法恰当才能提高效率D.网络丰富生活，为文化传播搭建新平台3.下列对“微行为”的“微点评”恰当的是（）选微行为微点评项A小江把同桌的秘密告诉自己的好朋友呵护友谊B小军组建“班级打卡小组”进行体能训练小团体主义C小华在“青骄第二课堂”学习禁毒知识守护生命D小肖自觉爱护公共设施，遵守公共秩序自信自强A.AB.BC.CD.D.4.劳动课将在2022年秋季学期正式成为全国中小学的一门独立课程，该课程包含整理与收纳、烹饪与营养、传统工艺制作、公益劳动与志愿服务等内容，劳动课程的设置有利于引导中小学生（）①重视课外实践，忽略课堂学习②树立劳动观念，养成劳动习惯③尊重劳动成果，提高劳动素养④巩固理论知识，培养批判精神A.①②B.①④C.②③D.③④5.某中学生放学骑车时，不慎剐蹭到路边的一辆私家车，他主动留下道歉信，并附上联系方式。
车主通过所留联系方式，致电询问该学生是否受伤，并接受了他的道歉。
这一事例说明（）A.乐于助人是社会主义新风尚B.诚实守信能够促进社会和谐C.尊重他人是立身处世的前提D.遵纪守法能更好地享有自由6.2022年获评全国五好家庭的莫益娟夫妇，13年如一日先后照顾了30个社会孤残儿童，用爱心、耐心、责任心陪伴这些孩子，让他们感受到家的温暖。
由此可见，此夫妇（）A.热心公益，赢得他人荣誉赞许B.见义勇为，不计个人利益得失C.孝亲敬长，履行公民法定义务D.关爱他人，传递了社会正能量7.确认公民的基本权利并保障其实现，是宪法的核心价值。
广东省惠州市2021-2022学年八年级下学期英语综合模拟期末试题(含答案)
广东省惠州市2021-2022学年八年级下学期英语综合模拟期末试题（含答案）2022年广东省惠州市八年级下册期末综合模拟试题英语（时间：75分钟满分：90分）二、语法选择（本大题共10小题，每小题1分，共10分）通读下面短文，掌握其大意，然后按照句子结构的语法和上下文连贯的要求，从每题所给的四个选项中选出一个最佳答案，并将答题卡上对应题目所选的选项涂黑。
Have you ever looked up at the night sky and seen a blue moon? A blue moon doesn’t happen at ___1___fixed time and it is not a common sight. And most of the time, it isn’t actually blue. A blue moon takes place when there ___2___ two full moons in one month. Most months have 30 ___3___ 31 days, so sometimes a month will have two full moons.In fact, the moon doesn’t change the color to make____4____ appear orange, red or blue. Instead, tiny particles (微粒) in the Earth’s air lead to the result. For example, the moon ____5____ appeared blue in Indonesia in 1883. That year, the volcano Krakatoa broke out. The ash (火山灰) ____6____ into the air, which stayed in the atmosphere for quite a while. It had the effect (效果) of making the moon appear blue.In 2020, sky-watchers were in for a treat when a blue moon lighted up the night sky ____7____ October 31, the first time that had happened in nearly 20 years.The blue moon also has another ____8____. Have you ever heard the phrase “once in a blue moon”? When people say that, they mean____9____ something uncommon happens—like a blue moon.What other colors have you seen the moon takes on? Carry on watching the night sky and you are sure ____10____ a beautiful moon at some point.( )1. A. a B. an C. the D. /( )2. A. is B. was C. are D. were( )3. A. but B. so C. and D. or( )4. A. it B. itself C. its D. it’s( )5. A. suddenly B. more suddenly C. most suddenly D. the most sudden( )6. A. send out B. sent out C. is sent out D. was sent out( )7. A. in B. at C. from D. on( )8. A. meaning B. meanings C. meaning’s D. meanings’( )9. A. what B. whether C. that D. when( )10. A. saw B. see C. to see D. seen三、完形填空（本大题共10小题，每小题1分，共10分）通读下面短文，掌握其大意，然后在每小题所给的四个选项中，选出一个最佳答案，并将答题卡上对应题目所选的选项涂黑。
2021年广州各区中考一模英语汇编：语法选择(含答案)
广州市八区2021届初三中考一模英语试卷分类汇编语法选择（含答案）【越秀区】一、语法选择（共15小题；每小题1分，满分15分）阅读下面短文，按照句子结构的语法性和上下文连贯的要求，从1--15各题所给的A、B、C和D项中选出最佳选项，并在答题卡，上将该项涂黑。
A blind boy sat on the steps of a building with a hat by his feet.He held up a sign which said:“I am blind,please help.”There were not1coins in the hat.A man was walking by.He took a few coins2his pocket and dropped them into the hat.He then took the sign,turned it around,and wrote some words.He put the sign back so that3who walked by would see the new words.Soon the hat4with coins.A lot more people were giving money to the blind boy.That afternoon the man who had changed the sign came to see how things were.The boy recognized his footsteps and asked,“Were you the one5changed my sign this morning?What did you write?”The man said,“I only wrote the6.I said what you said,7in a different way.I wrote:‘Today is a beautiful day,but I cannot see it.’”8signs told people that the boy was blind.But the first sign simply said the boy was blind.The second sign told people that they were9lucky that they were not blind.Should we be10 that the second sign was more effective?Moral of the Story:Be thankful for what you have.Be creative.Think11and positively.When life gives you100 reasons to cry,12life that you have1000reasons to smile.Face your past without regret.Handle your present with confidence.Prepare for the future without fear. Keep the faith and drop the fear.The most beautiful thing is13a person smiling.And even14is,knowing that you are15reason behind it!1. A.much B.little C.many D.few2. A.in B.through C.from D.to3. A.something B.nobody C.anything D.everyone4. A.filled B.was filled C.had filled D.was filling5. A.who B.which C.what D.whom6. A.true B.truth C.truly D.truer7. A.but B.and C.so D.or8. A.Either B.Neither C.Both D.All9. A.too B.just C.almost D.so10. A.surprise B.surprised C.surprising D.surprisingly11. A.different B.difference C.differently D.differ12. A.show B.to show C.showing D.shows13. A.sees B.saw C.seen D.to see14. A.beautiful B.more beautiful C.most beautiful D.beautifully15. A.a B.an C./ D.the【天河区】一、语法选择（共15小题；每小题1分，满分15分）阅读下面短文，按照句子结构的语法性和上下文连贯的要求，从1--15各题所给的A、B、C和D项中选出最佳选项，并在答题卡上将该项涂黑。
专题04 (押广东卷选择题) 生物圈中的人-备战2022年中考生物临考题号押题(广东卷)(原卷版)
专题04 （押广东卷选择题) 生物圈中的人（广东卷）本专题为必考考点，多以选择题或简答题的形式考查生物圈中的人，建议掌握。
属中度题或难题，分值：12—16分。
近3年（2019—2021）广东卷中主要考查了以下的知识点：知识模块年份题号难度系数详细知识点生物圈中的人201911 0.65 观察小鱼尾鳍内血液的流动的实验；12 0.65 肺与外界的气体交换；模拟膈肌的运动；13 0.94 耳的基本结构和各部分的功能；14 0.85 反射的类型；20209 0.65 人体需要的主要营养物质及作用；合理营养的含义及“平衡膳食宝塔”；10 0.65 营养物质的吸收及小肠的结构特点；动脉；肾脏；神经系统的组成及各部分的功能；11 0.65 激素的调节作用；12 0.85 眼球的结构与视觉的形成；近视和远视的形成原因及矫正；13 0.65 科学探究的基本过程；探究馒头在口腔中的变化；14 0.65 人类和动物的亲缘关系；生物进化的证据及实例；15 0.65 尿液的形成过程；血浆、原尿、尿液的对比；20 0.85 人类活动影响生态环境的事例；20219 0.65 反射弧的组成及各部分的功能；反射的类型；12 0.65 激素的调节作用；13 0.85 眼球的结构与视觉的形成；14 0.85 尿液的形成过程；15 0.85 女性生殖系统组成及各器官功能；生殖细胞的产生及受精；胚胎发育、营养及分娩；青春期身体变化的特点；19 0.65 消化道各器官的结构和功能；食物的消化过程；各种消化腺的位置和功能；考点1 人的生殖和发育1．（2020广东14题2分）科学家在以色列发现了非洲以外最古老的现代人类化石，将人类首次走出非洲的时间推前至少5．5万年。
关于人类进化说法错误的是（）A．现代类人猿与人类有着共同祖先B．化石是研究人类进化的最直接证据C．据化石推测“现代人类”不能直立行走D．非洲现代人类化石比以色列的更古老2．（2021广东15题2分）关于人类生殖和发有的叙述，错误的是（）A．受精卵在子宫内形成和发育B．胎儿通过胎盘与母体进行物质交换C．进入青春期后出现第二性征D．月经现象与雌性激素的分泌有关考点2 人体营养的来源3．（2020广东9题2分）如图为中国居民的“平衡膳食宝塔”，有关叙述错误的是（）A．糖尿病人应该少吃①层食物B．②层食物摄入不足可能会患坏血病等C．青少年应多吃一些③、④层的食物D．⑤层食物是人体主要的供能物质4．（2020广东10题2分）有关人体的结构与功能，下列叙述正确的是（）A．小肠内表面有许多皱襞和小肠绒毛B．膀胱是尿液形成的部位C．血管内都有防止血液倒流的瓣膜D．神经系统由大脑和神经组成5．（2020广东13题2分）某生物兴趣小组设计了“探究唾液对淀粉消化作用”实验，步骤及结果如下表，叙述正确的是（）试管编号Ⅰ号Ⅱ号Ⅲ号馒头处理适量碎屑加入液体唾液2毫升清水2毫升唾液2毫升搅拌情况搅拌搅拌搅拌温度37℃37℃0℃10分钟后滴加碘液①②变蓝A．实验现象为①不变蓝、②变蓝B．变蓝说明淀粉被消化了C．唾液能将淀粉分解成葡萄糖D．Ⅱ号和Ⅲ号可形成对照，变量为温度6．（2021广东19题2分）以下消化系统的结构中，与它的功能最为匹配的是（）A．胰脏——分泌胆汁B．胃——初步消化蛋白质C．肝脏——分泌消化酶D．小肠——消化维生素考点3 人体生命活动的能量供给7．（2019广东11题2分）题（a）图为“观察小鱼尾鳍内血液的流动”实验中对材料处理的示意图，题（b）图是用显微镜观察到的一个视野。
2021-2022学年广东省东莞市可园中学中考化学模拟试题含解析
2021-2022学年中考化学模似试卷注意事项：1．答题前，考生先将自己的姓名、准考证号填写清楚，将条形码准确粘贴在考生信息条形码粘贴区。
2．选择题必须使用2B铅笔填涂；非选择题必须使用0．5毫米黑色字迹的签字笔书写，字体工整、笔迹清楚。
3．请按照题号顺序在各题目的答题区域内作答，超出答题区域书写的答案无效；在草稿纸、试题卷上答题无效。
4．保持卡面清洁，不要折叠，不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀。
一、单选题（本大题共10小题，共20分）1．为完成以下实验内容，涉及的实验操作合理的是（）选项实验内容实验操作A 稀释浓硫酸先往烧杯中倒浓硫酸，后加蒸馏水B 用KMnO4制氧气先熄灭酒精灯，后从水中移出导管C 除去H2中的HCl杂质先通过浓硫酸，后通过饱和NaHCO3溶液D 用CO还原Fe2O3先通CO一段时间，后加热Fe2O3A．A B．B C．C D．D2．下列肥料属于复合肥料的是( )A．CO(NH2)2B．KCl C．NH4NO3D．KNO33．分别将浓盐酸、浓硫酸露置在空气中一段时间，下列变化正确的是A．溶液的质量均减小B．溶液中溶质的质量分数均减小C．溶质的质量均减小D．溶剂的质量均增大4．下列图标不适合在加油站使用的是A．B．C．D．5．与空气成分对比，呼出气体中含量明显降低的物质是A．氮气B．氧气C．二氧化碳D．水蒸气6．2019年3月30日四川凉山发生森林火灾,当地组织力量进行扑救。
对于较小的火可用树枝、湿麻布片等扑打使之熄灭，其灭火原理主要是A．隔绝空气(或氧气)B．清除可燃物C．降低温度至可燃物着火点以下D．降低可燃物的着火点7．为保障“舌尖上的安全”，下列做法合理的是( )A．霉变大米热煮后食用B．甲醛溶液浸泡虾仁防腐C．按规定使用食品添加剂D．用工业用盐如亚硝酸钠烹调食物8．下图所示的实验操作与方法正确的是（）A．检查装置气密性B．过滤C．点燃酒精灯D．称量氯化钠9．下列叙述中正确的是（）A．酸溶液一定显酸性，碱溶液一定显碱性，盐溶液一定显中性B．NaCl、Na2CO3、Na2SO4、NaNO3、NaHCO3均能溶于水C．复分解反应一定都生成水D．使酚酞试液变红的溶液一定是碱的溶液10．水的污染原因有如下说法：①工业生产中废渣、废液的任意排放；②城市生活污水的任意排放；③农业生产中农药、化肥的大量施用；④酸雨与土壤接触；⑤冰川融化．其中正确的是（）A．①②③④B．①②③C．④⑤D．①②③④⑤二、填空题（本大题共1小题，共4分）11．金属与我们生活息息相关，同答下列问题。
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2021-2022广东中考语法选择模拟题（1）二、语法选择（本大题有10小题，每小题1分，共10分）阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在各小题所给的四个选项中，选出一个最佳答案，并将答题卡上对应题目所选的选项涂黑。
Silent and calm, 25-year-old Linda looks out of the window. She 31 be smiling now, but it's been a long, hard road to happiness. Today, she is an author of a best-seller and also 32well- known artist. Her story is about overcoming difficulties and encouraging others to do the same.Linda did not begin talking 33 she was two and a half years old. Unluckily, it was found that she had autism( 自闭症) and had difficulty in social communication. Linda's mother taught her the meaning of independence by example and encouraged her to learn 34 to do things on her own.Growing up, she was seriously bullied(欺凌). She was called an alien and some kids would even steal her snacks. She tried changing schools, but the bullying was even 35 . She also had trouble with tests. But she didn’t let them 36 her. With the help of her parents, Linda received speech and communication treatment.After a long period of treating, doctors said that Linda would not succeed or finish 37studies. But she proved(证明) them wrong. Linda worked hard to build up her confidence and found her ability--- creating beautiful paintings. And at 18, Linda went to art college to study painting and 38 by the local volunteers to join them on community visits to share her story. By sharing her experience, Linda 39 others and changing their lives.Now Linda has gone 40 the dark times. And she has come to realized that she is not useless.31. A. can B. may C. can’t D. may not32. A. the B. / C. a D. an33. A. when B. after C. until D. since34. A. why B. whether C. how D. what35. A. serious B. more serious C. seriously D. more seriously36. A. stop B. stops C. to stop D. stopping37. A. her B. herself C. hers D. she38. A. invites B. is invited C. invited D. was invited39. A. influences B. is influencing C. influenced D. has influenced40. A. by B. over C. away D. through二、语法选择（本大题有10小题，每小题1分，共10分）阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在各小题所给的四个选项中，选出一个最佳答案，并将答题卡上对应题目所选的选项涂黑。
If you are hungry, what do you do? Have your favorite meal and stay quiet after that. Just like your stomach, your mind is also hungry. But it never lets you know. It 31 serves your needs and never lets itself grow because you keep it busy thinking about your friends or favorite stars. When mind loses 32 freedom to grow, creativity gets a full stop. This 33 be the reason why we all sometimes think “What happens next?”, “Why can’t I think?”In fact, hunger of the mind 34 through wide reading. Why reading but not watching TV? It is because reading 35 the most educative tool used by us since our childhood.Once you read a book, you run your eyes 36 the lines and your mind tries to explain something to you. The interesting part of the book 37 is stored in your mind is regarded as a seed（种子）. Now this seed is unknowingly used by you to develop new ideas. If it is used many times, the same seed can give you great help to relate lots of things. You can never think of these things even in 38 dreams in your life.This is creativity. Also this helps you 39 your vocabulary. In no time you can start talking with your friends in English or any other language 40 you will never run out of the right words. So guys, do give food for your thoughts by reading, reading and more reading.31.A. silent B. silently C. silence D. silents32.A. it’s B. it C. its D. itself33.A. might B. should C. shall D. need34.A. is solved B. was solved C. solves D. solved35.A. was B. has been C. will be D. are36.A. at B. for C. about D. through37.A. that B. what C. who D. whom38.A. wilder B. wild C. wildest D. the wildest39.A. increase B. increasing C. to increasing D. increased40.A. or B. and C. although D. so二、语法选择（本大题有10小题，每小题1分，共10分）通读下面短文，掌握其大意，然后按照句子结构的语法性和上下文连贯的要求，从每小题所给的四个选项中，选出一个最佳答案，并将答题卡上对应题目所选的选项涂黑。
What do you usually do in your spare time? Many students choose to stay at home, but not Zhang Hua, 31 11-year-old boy from Zhuhai. Every day, he 32 at least two hours on outdoor activities.With his 33 help, he enjoys outdoor activities rather than focusing on his study all the time. One year ago, his father noticed that Zhang Hua did not go out for enough exercise afterschool, so he took his son to do outdoor activities. 34 he is in primary school, he is now famous for outdoor activities on the Internet.Many people show their opinions about Zhang Hua.Some teenagers say 35 exercise can make them relaxed and improve their memory. The more outdoor activities they do, 36 their brains will be. Although facing increasing pressure in studies, they join the school’s athletic athletic programs. It’s not only a way to relax but also a kind of 37 for will power (毅力).However, some parents express their worries. They don’t think two hours 38 too much for children at Zhang Hua’s age, but it might b e difficult when their children get older. They have a lot of homework and after-school classes, 39 on weekdays. Sometimes, parents are 40 about the safety of outdoor activities because children may do crazy and risky things.In fact, both parents and children like outdoor activities. They think that outdoor activities play an important role in their daily life. They can make children’s brain active and improve their study.31. A. a B. an C. the D. /32. A. takes B. costs C. spends D. pays33. A. father’s B. father C. fathers D. fathers’34. A. If B. Until C. Unless D. Although35. A. how B. that C. which D. whether36. A. the more active B. the most active C. the more actively D. the most actively37. A. train B. trains C. trainer D. training38. A. is B. isn’t C. are D. aren’t39. A. clearly B. especially C. actually D. recently40. A. worry B. worries C. worried D. worrying二、语法选择在每小题所给的四个选项中，选出可以填入空白处的最佳答案，并将答题卡上对应题目所选的选项涂黑。