2018学年第二学期广州中学期中测试卷

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广州市白云区白云广雅实验学校2018-2019学年第二学期期中考试初一年级英语试卷及参考答案

12 3 4A.andB.butC.orD.soA.her; herselfB.her; hersC.hers; herselfD.hers; hersThe dress is and she made it .5 A.called; is cooking B.call; cooks C.called; cooks D.call; is cooking —Did she take-away again? It is unhealthy.—No. Look! She with her roommate in the kitchen.6 A.sweet something; goodB.something sweet; wellC.anything sweet; goodD.sweet anything; wellIf you want to keep your teeth healthy, you'd better not eat at night, although ittastes .7 A.stories; is B.stories; are C.story; are D.story; isOne of her favorite of Disneyland Snow White.8 A.a glasses of milkB.a glass of milksC.two glasses of milksD.two glasses of milkTom, please give me .9 A.dance B.danced C.to dance D.dancingWhen I passed the park yesterday, I saw some ladies near the lake.10 A.are; choose B.is; chooses C.is; choose D.are; choosesThe number of tourists over 5 million this year. A number of them train to take.11Last summer, my family and I went to England and we spent two weeks in Cornwall. It tookus five hours 1 there by car. We stayed in a hotel near a lake. We did a lot of different things there: we went for long walks, played games, went shopping and 2 in the lake.12三、语法选择（共10小题，每小题1分，共10分）1. A.get B.got C.to get D.getting2. A.swimmingB.swimC.swimsD.swam 3. A.happyB.happilyC.happierD.happiness 4. A.onB.withC.byD.in 5. A.themB.theyC.themselvesD.theirs 6. A.hungryB.hungrilyC.hungerD.hungrier 7. A. a wayB.waysC.wayD.the way 8. A.aB.theC.anD./9. A.whenB.howC.whatD.which 10. A.because B.so C.but D.orI played 3 at first, but then something terrible happened. One morning I went to the forest near the hotel 4 myself. I walked and walked. I watched the birds and took some photos of 5 . When I got 6 , I wanted to go back to the hotel. But I couldn't find the way back. I tried different 7 . However, I was still in 8 same place at last."Oh God! I don't know 9 to do. I'm so afraid!" I thought. Later it started to rain. I didn't have an umbrella 10 I was wet and cold. I decided to stay under a tree and waited for my parents. After a few hours they found me. It was dark and I was cold, hungry and scared. I will never go to the forest again.1. zy B.stupid C.deaf D.blindOne day a young painter went by a garden. He was attracted by the beauty of the garden.He imagined how happy he could be if he lived in such a beautiful place. Then, suddenly he found the old gardener was 1 . Surprised, the painter asked that old man, "Why are you looking after these flowers when you can't see them? " The gardener answered, "I can tell you 2 reasons—First, I was a gardener when I was young, and really like this job.Second, 3 I can' see the flower, I can touch them. Third, I can 4 the sweetness of them. As for the last one, that's 5 .""Me? But you don't know me." said the painter."Yeah, it's 6 that I don't know you. But I know flowers are beautiful angles. Many people will look at my garden and the beauty will make them feel good. It also gives me a 7 to speak to you now. At the same time, we enjoy the happiness these flowers 8 to us.The man grows flowers in order that everyone can enjoy their beauty. I believe every flower has 9 . They can see the 10 of the old man's heart and the sweetness of his soul.13四、完形填空（共10小题，每小题1分，共10分）2. A.twoB.threeC.fourD.five 3. A.howeverB.althoughC.unlessD.until 4. A.smokeB.hearC.lookD.smell 5. A.youB.meC.himD.her 6. A.easyB.sureC.trueD.honest 7. A.jobB.chanceC.timeD.letter 8. A.broughtB.fetchedC.tookD.carried 9. A.facesB.nosesC.eyesD.ears 10. A.kindness B.value C.truth D.secretThere was a proud teak tree in the forest. He was tall and strong. There was a small herbnext to him.The teak tree said, "I am very handsome and strong. No one can defeat （击垮） me."Hearing this, the herb replied, "Dear friend, too much pride is harmful. Even the strongest will fall one day."The teak didn't pay attention to the herb's words. He continued to praise himself.A strong wind blew. The teak stood bravely. Even when it rained, the teak stood strong by spreading its leaves.During these times, the herb bowed low. The teak made fun of the herb.One day, there was a storm in the forest. The herb bowed low again. As usual, the teaktree did not want to bow.The storm kept growing stronger. The teak could no longer bear it. He felt his strengthgiving away.He tried his best to stand up, but in the end, he fell down. That was the end of the proudtree. When everything was calm again, the herb stood straight. He looked around. He saw that proud teak tree had fallen down.14 A.Low and proudB.Small and wiseC.Tall and handsomeD.Strong and cleverWhat do you think of the herb?（1）A.承受 B.反对 C.重视 D.放弃What's the meaning of the underlined word "bear" ?（2）A.He bowed low.B.He became stronger.C.He beat the herb.D.He fell down.What happened to the proud teak tree at last?（3）五、阅读理解（共20小题，每小题1.5分，共30分）A.B.C.D.Which of the statement is NOT true?The teak tree stood far away from the herb.The herb could stand straight again because it bowed low in the storm.The teak tree didn't want to bow in the storm as usual.The teak tree didn't agree about the herb's words.（4）A.B.C.D.What does the passage mainly tell us?Storms make trees fall down.We must make ourselves stronger and stronger.We shouldn't be too proud of ourselves.It is better to be small than to be strong.（5）A young woman was walking through a supermarket to pick up a few things when shenoticed an old man following her around. Thinking nothing of it, she ignored him and went on shopping. After she got what she wanted, she went to the checkout line, but the old man got in front of her."Pardon me!" he said, "I'm sorry if my staring at you has made you feel uncomfortable. It is just because you look like my granddaughter, who just died recently. And I miss her very much.""I'm very sorry." said the young woman. "Is there anything I can do for you? ""Yes." the old man said, "As I'm leaving, can you say 'Goodbye, grandpa' to me? It would make me feel so much better.""Sure." answered the young woman.As the old man was leaving, she called out, "Bye-bye, grandpa!"When she stepped up to the checkout counter, she saw that her total was ＄178.50."How can that be? " she asked. "I only bought a few things!""Your grandpa said you would pay for him." said the clerk.15 A.B.C.D.Why did the old man follow the woman and let her say "Bye-bye, Grandpa? "He wanted to steal her money.She looked like her dead granddaughter.He wanted to stare at her.He wanted her to pay for him.（1）A.B.C.D.According to the passage we can know that .the young woman is a careless personthe young woman is as clever as the old manthe young woman was happy to pay for the old manthe young woman didn't know the old man at all（2）What does the underlined word "ignored" mean?（3）A.忽视B.浏览C.可怜D.鄙视A.More than $178.50.B.Less than $178.50.C.About $78.50.D.Just $178.50.How much should the woman pay for what she bought?（4）A.A kind-hearted young womanB.The total was less than $178.50C.Bye-bye grandpaD.An old man and his granddaughterWhich of the following is the best title of the story?（5）Many big airplane companies are developing electric （电动的）planes and personal flyingvehicles （车辆）.Boeing is one of those companies. It recently invested in Zunum Aero, a company working to build electric airplanes. By the early 2020s, the company plans to operate the electric airplane to carry 10-15 passengers on trips up to 1, 100 kilometers. It says the cost of such flights could be as low as $25 each way.Zunum's planes will be powered by two large engines at the back. The airplane will be "hybrid-electric ", meaning they use mostly battery （电池）power, but also burn fuel （燃料）when needed.The goal of the company is to fly fully electric planes in the end, although most experts believe this could take many years. This is because battery technology still has a long way to go to provide long-lasting power, but not be too heavy for the airplane.The flying vehicle was designed to fully drive as both a car and an airplane. It runs on a hybrid engine that burns gas. The vehicle has wings that collapse for driving. Driver and pilot licenses will be required to drive the flying vehicle.16 A.electric airplanesB.all kinds of planesC.battery powerD.all kinds of carsZumum Aero is a company working to build .（1）A.混合电能的 B.太阳能的 C.电气化 D.现代化的what's the meaning of the underlined word "hybrid-electric”?（2）A.B.C.D.Why will it take a very long time to make fully electric planes?Because battery technology is too expensive.Because providing long-lasting power has a long way to go.Because long-lasting power is too light.Because it is cheaper to burn fuel than to use electricity fully.（3）A.A driver license.B.A pilot license.C.Both driver and pilot licenses.D.A hybrid engine that bums gas.What do you need if you want to drive the flying vehicle?（4）A.a science magazineB.a story bookC.a textbookD.a dictionaryThe passage probably comes from .（5）BIKE TO WORK DAYFRIDAY MAY 15HAVE FUN, SAVE MONEY , MAKE FRIENDS, SEE THE CITY , LIVE LONGERMay is the Bike Month of the USA, and it started in 1956.The third week in May is Bike to Work Week: and the third Friday of May is Bike to Work day. Join in!Stop at any of the stops on your way to work from 7:00-10:30 a.m. for some coffee, juice,cakes, bread, fruit and "I bike to work" T-shirts.Register （注册） now. It's free!Stop 1 at Woodruff Park 7:30-9:00 a.m.Stop 2 in front of Art Center 7-10 a.m.Stop 3 in front of Colony Square 7:30-10:30 a.m.Stop 4 at Edgewood Bridge 7:30-9:30 a.m.*Only the first 14, 000 people who register can get the T-shirts.*There are only a few stops open for your afternoon way back.www.biketoworkmetrodc. org17 A.one B.three C.five D.sevenAccording to the passage, there is/are reason （s ） why biking to work is good forpeople.（1）A.March B.April C.May D.JuneBike to Work Week is in .（2）A.something to eatB.something to playC.something to drinkD.something to wearNo one can get at the stops on their way to work.（3）A.B.C.D.Which is TRUE according to the passage?Mary can stop at every stop on her way home from work in the afternoon.Mary can only stop once on her way to work.Jack can have a cup of coffee at Woodruff Park at 8 p.m.If Tom is the 1400th person to register, he will get an "I bike to work" T-shirt.（4）A.Buy a bike. B.Write an e-mail.How can people register for Bike to Work Day?（5）C.Make a phone call.D.Visit a website.A.B.C.D.E.Today, an increasing number of people are always looking at their mobile bones with theirheads down. These people are called the Heads-down Tribe. 1There are more and more traffic accidents happening because of mobile phones. 2 In order to make drivers pay more attention to driving, some new traffic rules have been made.As we can see above, using mobile phones may cause traffic accidents. Also, more and more interesting and strange facts happen to the Heads-down Tribe, 3 As a result, he knocked into a big lost bear. When he lifted his eyes from the phone, he was so afraid that he turned around and ran away as quickly as possible.Another fact is that we can often see people in the restaurant eating face to face but looking at their own mobile phones. It's strange that they don't talk to the ones who sit opposite to them during the meal. 4Mobile phones are helpful and necessary tools for modern life. 5 Let's be "healthy"users and try to be the Heads-up Tribe".Whether they are good or not depends on how people use them.A man in America kept using mobile phone on his way home.Some even have fun communicating with others on the phone.Heads-down tribe members now can be seen everywhere.More drivers are likely to use mobile phones while driving.18My mom always encourages me and gives me s .19Family m always get together during the Spring Festival.20Mr. Brown comes from France, so he can speak F very well.21My parents don't a me to stay outside late. l must get home before 10 p.m. .22六、阅读填空（共5小题，每小题1分，共5分）七、单词拼写（共10小题，每小题0.5分，共5分）23Guangzhou l in the south of China.24Mr. Chen is a p teacher. He often spends a lot of time helping his students.25To protect our Earth, we should try our best to fight a pollution.26They kept trying climbing the hill. F , they got to the top of the mountain.Mum, have you seen my key? I couldn't find it a .2728Drinking too much wine is h to your health.八、完成句子（共5小题，每小题2分，共10分）请停止取笑他人。

2017-2018年部编版第二学期二年级语文期中试卷

2018春二年级语文期中测试卷（总分100分；卷面4分；试题总分96分）一、积累运用（61分）1、看拼音拼词语，并规范地写在田字格里。

（6分）wēn nuǎn bōwén mǐn zúrènào shāo kǎo jīng líng2、写出带下面偏旁的字。

（3分）3、在下面加点的字选择正确的读音打“√”（4分）。

炸．鸡腿（zházhà）漂．亮（piào piāo）的．确（dídē）裁．剪（cái chái）4、比一比，再组词。

（6分）财（）菜（）使（）材（）彩（）便（）5、按照时间顺序排列下面的节日，再写一个少数民族的节日。

（4分）端午节、清明节、元宵节、春节、重阳节、中秋节少数民族的节日：6、把下列词语补充完整（6分）碧（）如（）万里（）（）世界（）（）神州（）（）华夏（）（）（）面（）方7、把下列词语补充完整（6分）。

（）的天空（）的柳条（）的微风（）的老师8、读下面的句子，根据内容提两个问题。

（4分）xi áng小鸟在无边无际的天空自由自在地飞翔。

问题1：问题2：9、读一读例句，注意加点部分，照样子补充句子（6分）。

门前开着一片五．．．颜．六色．．的鲜花。

教室里山坡上10、读一读，填一填。

（6分）（1）莺飞，拂提杨柳醉。

（2）予人玫瑰，。

（3）野火，春风吹。

11、照样子说一说。

（6分）例：田野葱葱绿绿的像一片柔软的绿毯。

天上的云雪白雪白的像。

。

大树又粗又壮像。

。

12、把你积累的词写下来。

（6分）（1）形容很高兴的：（2）描写景物的：二、语言运用（20分）妈妈是一座山山，高大，稳重。

山，秀丽，温柔。

妈妈就是一座山。

妈妈是山，我是树，山哺育了树。

妈妈很爱我，爱得深沉，爱得实在。

她就像山一样，不惜用自己生命的涓涓细流去滋润干渴的我——棵小树，让我长得枝繁叶茂。

广东第二师范学院番禺附属中学2018-2019学年高一下学期期中考试数学试题 Word版含答案

2018-2019学年第二学期广东二师附中中段测试高一级试题数学本试卷共4页，22小题，满分150分．考试用时120分钟．注意事项：1．答卷前，考生务必用黑色字迹钢笔或签字笔将自己的姓名和考生号、试室号、座位号填写在答题卡上．用2B 铅笔将试卷类型（A ）填涂在答题卡相应位置上．2．选择题每小题选出答案后，用2B 铅笔把答题卡上对应题目选项的答案信息点涂黑，如需改动，用橡皮擦干净后，再选涂其他答案，答案不能答在试卷上．3．非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内的相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔和涂改液．不按以上要求作答的答案无效．4．考生必须保持答题卡的整洁．考试结束后，将答题卡和答卷一并交回．试卷要自己保存好，以方便试卷评讲课更好开展.第Ⅰ卷（选择题共60分）一．选择题（本大题共12小题，每小题5分，满分60分）1、直线013=+-y x 的倾斜角为（）A .30°B ．60°C ．120°D ．150°2、已知直线12:220,:410l x y l ax y +-=++=, 若12l l ⊥, 则a 的值为（） A . 2- B. 2 C. 12-D. 8 3、在△ABC 中，060B =，2b ac =则△ABC 一定是( ) A ．直角三角形B ．钝角三角形C ．等腰直角三角形D ．等边三角形4、将一个直角边长为1的等腰直角三角形绕其一条直角边旋转一周所形成几何体的体积为（）A ．43π B ． 4π C ． 3π D ． 3π 5、设,m n 为两条不同的直线，α为平面，则下列结论正确的是（）A ．,//m n m n αα⊥⇒⊥B ． ,//m n m n αα⊥⊥⇒C ．,//m m n n αα⊥⇒⊥D ．//,////m m n n αα⇒ 6、一个几何体的三视图及其尺寸如图(单位:),则该几何体的表面积为( )A ．224cm πB ．218cm πC ．245cm πD ． 248cm π 7、球的表面积与它的内接正方体的表面积之比是 ( ) A ．3π B ．4π C ．2πD ．π 8、在ABC ∆中，已知222sin sin sin 3sin sin B C A A C --=．求B 的度数（）．A ．30°B ．60°C ．120°D ．150°9、.如图所示,在正方体D C B A ABCD 111-中,若E 是A 1C 1的中点,则直线CE 垂直于( )A.AC B.BD C.1A D D.11A D . 10、已知顶点在单位圆上的ABC ∆中，角A 、B 、C 的对边分别为a 、b 、c ，且C b B c A a cos cos cos 2+=，422=+c b ，则ABC ∆的面积为（）． A.38B.34C. 3D. 2311、已知正方形ABCD 的对角线AC 与BD 相交于E 点，将ACD ∆沿对角线折起，使得平面ABC ⊥平面ADC （如图），则下列命题中正确的是（）A. 直线AB ⊥直线CD ，且直线AC ⊥直线BDB. 直线AB ⊥平面BCD ，且直线AC ⊥平面BDEC. 平面ABC ⊥平面BDE ，且平面ACD ⊥平面BDED. 平面ABD ⊥平面BCD ，且平面ACD ⊥平面BDE12、如图所示，已知两点),(04A ),(40A ，从点),(02P 射出的光线经直线AB 反射后再射到直线OB 上，最后经直线OB 反射后又回到P 点，则光线所经过的路程是( ) A ．210 B ．6 C ．33 D ．25第Ⅰ卷（非选择题共90分）二．填空题（本大题共4小题，每小题5分，满分20分）． 13、锐角ABC ∆中，若面积ab S 43=，则角C =___________ 14、如图，四棱锥S －ABCD 中，底面ABCD 为平行四边形，E 是SA 上一点，当点E 满足条件：__________时，SC ∥平面EBD.15、如图所示，设,A B 两点在河的两岸，一测量者在A 所在的同侧河岸边选定一点C ，测出AC的距离为50m ，0045,105ACB CAB ∠=∠=后，就可以计算出,A B 两点的距离为________16、设点P 在直线30x y +=上,且P 到原点的距离与P 到直线32x y +=的距离相等,则点P 的坐标为 .三．解答题（本大题共6小题，满分70分．解答应写出文字说明、证明过程或演算步骤）．三、解答题(本大题共6题,共70分.解答须写出说明、证明过程和演算步骤. 解答写在答题卡上的指定区域内.)17、（本小题满分10分）已知直线()12:310,:20l ax y l x a y a ++=+-+=．（1）若12l l ⊥，求实数a 的值；（2）当12//l l 时，求直线1l 与2l 之间的距离．18、（本小题满分12分）如图，已知面11AA B B 垂直于圆柱底面，AB 为底面直径，C 是底面圆周上异于A B ，的一点，12AA AB ==．求证：（1）11AAC BAC ⊥平面平面；（2）求几何体1A ABC -的最大体积V ．19、（本小题满分12分）设ABC ∆中,角A 、B 、C 的对边分别为a b c 、、，且3,1,2b c A B ===．（1）求a 的值；（2）求sin()4A π+的值．20、（本小题满分12分）如图，在△ABC 中，BC 边上的高所在的直线方程为210x y -+=,∠A 的平分线所在的直线方程为0y =,若点B 的坐标为（1，2），求：（1）点A 和点C 的坐标；（2）求△ABC 的面积．21．（本小题满分12分）如图，四棱锥P ABCD -中，侧面PAD 为等边三角形且垂直于底面ABCD ,1,90.2AB BC AD BAD ABC ==∠=∠=︒ （1）证明：直线BC ∥平面PAD ;（2）若△PCD 的面积为27，求四棱锥P ABCD -的体积.22、（本小题满分12分）已知向量()()()2sin ,sin cos ,3cos ,sin cos (0)a x x x b x x x λλλ=+=->，函数()f x a b =⋅的最大值为2.（I ）求函数()f x 的单调递减区间；（II ）在ABC ∆中，内角A B C 、、的对边分别为2,cos 2b aa b c A c-=、、，若()0f A m ->恒成立，求实数m 的取值范围.2018-2019学年第二学期中段测试高一级试题答案一、选择题题号 1 2 3 4 5 6 7 8 9 1011 12 答案 B ADDCACDBBDA二、填空题13.14.E 为SA 中点/SE=EA 15. 502m 16. 3131(,)(,)5555--或三、解答题 17、【答案】（1）由12l l ⊥知()320a a +-=，解得32a =； ……………4分（2）当12l l ∥时，有()()230320a a a a --=⎧⎪⎨--≠⎪⎩解得3a =， (6)12:3310,:30l x y l x y ++=++=，即3390x y ++=， ……………8分距离为229142333d -==+ ……………10分 18、【答案】（1）证明：C 是底面圆周上异于A ，B 的一点，AB 是底面圆的直径，∴ AC⊥BC． ……………1分AA 1⊥平面ABC ，BC ⊂平面ABC ，∴AA 1⊥BC， ……………2分又AC∩AA 1=A ， ……………3分∴BC⊥平面AA 1C ． ……………4分又BC ⊂平面BA 1C ， ……………5分∴平面AA 1C⊥平面BA 1C ． ……………6分（2）解：在Rt△ABC 中，当AB 边上的高最大时，三角形ABC 面积最大，此时AC=BC. 此时几何体1A ABC -取得最大体积. ……………8分090,2ACB AB ∠==，则由AB 2=AC 2+BC 2， ……………10分 AA 1⊥平面ABC ， AA 1是几何体1A ABC -的高所以体积max 11112332ABC V S AA ⎛=⋅=⨯⨯= ⎝23． ……12分19．解：（1）∵2A B =，∴sin sin 22sin cos A B B B ==， ………1分∴22222a c b a b ac+-=⋅， ………3分∵3,1b c ==，∴212a =，∴a = ………5分2）由（1）可得2221cos 23b c a A bc +-==-， ………7分∵0A π<<，∴sin A ………9分 ∴sin()sin cos +cos sin444A A A πππ+=13=-= ………12分 20、【答案】（1）解：由⎩⎨⎧==+-.0,012y y x 得顶点(1,0)A -． ………2分又AB 的斜率2011(1)AB k -==--．∵x 轴是A ∠的平分线，故AC 的斜率为1-，AC 所在直线的方程为(1)y x =-+① ………3分已知BC 上的高所在直线的方程为210x y -+=，故BC 的斜率为2-， BC 所在的直线方程为22(1)y x -=--② ………4分解①，②得顶点C 的坐标为(5,6)-． ………6分（2）()()22152645BC =-++= ………7分又直线BC 的方程是240x y +-=A 到直线的距离24655d --==………10分所以ABC ∆的面积1164512225BC d =⋅=⨯⨯= ………12分 21、解：（1）在平面ABCD 内，因为90BAD ABC ∠=∠=，∴所以//BC AD . ………1分又BC ⊄平面,PAD AD ⊂平面PAD ， ………3分∴//BC 平面PAD ………4分（2）取AD 的中点M ，连结,PM CM .12AB BC AD ==及//BC AD ，90ABC ∠= ∴ 四边形ABCM 为正方形，∴CM AD ⊥. ………5分因为侧面PAD 为等边三角形且垂直于底面ABCD ，平面PAD平面ABCD AD =，所以,PM AD PM ⊥⊥底面ABCD . ………6分因为CM ⊂底面ABCD ，所以PM CM ⊥.… ………7分设BC x =，则,2,3,2CM x CD x PM x PC PD x =====.取CD 的中点N ，连结PN ，则PN CD ⊥，所以142PN x =………8分因为PCD ∆的面积为27，所以11422722x x ⨯⨯=，解得2x =-（舍去），2x =.………10分于是2,4,23AB BC AD PM ====.所以四棱锥P ABCD -的体积12(24)32V +=⨯⨯=………12分22、试题解析：（1）函数()•23sin cos f x a b x x λ==+()sin cos x x λ+()sin cos x x - ………1分()22sin cos sin cos x x x x λ=+-)cos2x x λ=-12cos22x x λ⎫=-⎪⎪⎝⎭2sin 26x πλ⎛⎫=- ⎪⎝⎭， ………2分因为()f x 的最大值为2，所以解得1λ=. ………3分则()2sin 26f x x π⎛⎫=- ⎪⎝⎭，由3222262k x k πππππ+≤-≤+， ………4分可得：3522223k x k ππππ+≤≤+，536k x k ππππ+≤≤+，所得函数()f x 的单调减区间为()536k k k Z ππππ⎡⎤++∈⎢⎥⎣⎦，. ………6分（2）由2222cos 22b a b c d A c bc-+-==，可得22222b ab b c a -=+-，即222b a c ab +-=. 解得1cos 2C =，即3C π=. ………8分因为203A π<<，所以72666A πππ-<-<，1sin 2126A π⎛⎫-<-≤ ⎪⎝⎭， ………10分因为()2sin 206f A m A m π⎛⎫-=--> ⎪⎝⎭恒成立，则2sin 26A m π⎛⎫-> ⎪⎝⎭恒成立，即1m ≤-. ………12分。

广东深圳市高级中学2017-2018学年高一下学期期中考试语文试题及答案(解析版) 人教版高一下册

广东深圳市高级中学2017-2018学年高一下学期期中考试语文试题及答案（解析版）人教版高一下册深圳市高级中学2017－2018学年第二学期期中测试高一语文第I卷课内基础1.下面加点词语解释正确的一项是A.河内凶(战乱)B.秦人开关延敌(迎击)C.因河为池(防御建筑)D.信臣精卒（相信）【答案】B【解析】试题分析：题干是“下面加点词语解释正确的一项是”。

本题考查学生对文言实词意思和用法的把握。

考生应把选项中的句子代入文中，结合上下文的语境推测意思和用法的正误。

A项，“凶”：荒年。

C项，“池”：护城河。

D项，“信”：可靠的。

点睛：解答此类题的方法是把握语境，将各个选项放回原文，根据上下文查对正误，还要根据自己的积累判断这个词的意义，所以学生平时多积累常用文言实词很有必要。

2.下列加点词中词类活用现象归类正确的的一项是①填然鼓之②上食埃土③外连横而斗诸侯④吾从而师之⑤天下云集响应⑥序八州而朝同列⑦吞二周而亡诸侯⑧且庸人尚羞之A.①/②⑤/③⑥⑦/④⑧B.①②⑤/③⑦/④⑧/⑥C.①/②⑤/③⑥/④⑦⑧D.①②⑤/③/④⑦/⑥⑧【答案】A【解析】试题分析：题干是“下列加点词中词类活用现象归类正确的的一项是”。

本题考查理解常见文言词类活用的辨析。

①“鼓”：名词作动词，击鼓。

②⑤都是名词作状语，分别译为：向上；像云一样。

③⑥⑦都是使动用法，分别译为：使……争斗；使……朝拜；使……灭亡。

④⑧都是意动用法，分别译为：以……为师；以……为羞。

3.下列句中不含通假字的一项是A.赢粮而景从B.君子生非异也C.或师焉，或不焉D.数罟不入洿池【答案】D【解析】试题分析：题干是“下列句中不含通假字的一项是”。

本题考查理解和分析常见文言实词中通假现象。

A项，“景”通“影”，像影子一样。

B项，“生”通“性”，禀赋，天赋；C项，“不”通“否”。

4.下列各句中加点的词语与现代汉语用法相同的一项是A.养生丧死无憾，王道之始也B.蚓无爪牙之利，筋骨之强C.吾从而师之D.自以为关中之固，金城千里【答案】D........................5.选出对下列文言句式归类正确的一项①是亦走也②则无望民之多于邻国也③子孙帝王万世之业也④身死人手，为天下笑者⑤申之以孝悌之义⑥未之有也⑦蚓无爪牙之利，筋骨之强⑧句读之不知，惑之不解A.①②③/④⑤/⑥⑧/⑦B.①③/②⑤/④/⑥⑧/⑦C.①③/②⑤/④/⑥⑦⑧D.①②③/④⑤/⑥⑧/⑦【答案】D【解析】试题分析：题干是“选出对下列文言句式归类正确的一项”。

2018-2019学年第二学期七年级下册英语期中试卷

2018—2019学年度第二学期期中学情分析样题七年级英语2019.04考试时间：100分钟满分：100分（将答案按序号填在答卷纸上．．．．．．．．．．．．）选择题（共50分）一、听力（共15小题；每小题1分，满分15分）第一部分听对话选图片听下面5段对话，从题中所给的A、B、C三幅图片中选出最佳选项。

听每段对话前，你将有5秒钟的时间阅读题目；听完后，你仍有5秒钟的时间答题，每段对话听两遍。

1. What sign are the two speakers talking about?A. B. C.2. What is in the box?A. B. C.3. When does Amy get up every day?A. B. C.4. What is Lily’s pet?A. B. C.5. What’s in the fridge?A. B. C.第二部分听对话回答问题听下面的对话，每段对话后有一个小题，请根据你所听到的内容，从题中所给的A、B、C三个选项中选出最佳选项。

听每段对话前，你将有时间阅读各个小题，每小题5秒钟；听完后，你仍有5秒钟的时间答题。

每段对话听两遍。

6. When will the film begin?A. At 7:30.B. At 8:00.C. At 8:30.7. What’s the weather like now?A. Sunny.B. Rainy.C. Snowy.8. Which floor does Susan live on?A. On the second floor.B. On the fourth floor.C. On the sixth floor.9. How much is one book ?A. 5 Yuan.B. 4 Yuan.C. 6 Yuan.10. Where is the man’s watch?A. In the library.B. In the school hall.C. On the grass.第三部分听短文回答问题听下面的短文，短文后有几个小题，请根据你所听到的内容，从题中所给的A、B、C三个选项中选出最佳选项。

2018-2019学年广州市海珠区八年级下期中数学试卷(含答案解析)

2018-2019学年广东省广州市海珠区八年级（下）期中数学试卷一、选择题（本大题共10小题，每小题2分，共20分．在每小题给出的四个选项中，只有一个符合题意）1．下列运算正确的是（）A．+＝B．•＝C．＝D．＝32．若，则（）A．b＞3B．b＜3C．b≥3D．b≤33．若的整数部分为x，小数部分为y，则（x+）y的值是（）A．B．3C．D．﹣34．下列给出的条件中，不能判断四边形ABCD是平行四边形的是（）A．AB∥CD，AD＝BC B．∠A＝∠C，∠B＝∠DC．AB∥CD，AD∥BC D．AB＝CD，AD＝BC5．如图，铁路MN和公路PQ在点O处交汇，∠QON＝30°．公路PQ上A处距O点240米．如果火车行驶时，周围200米以内会受到噪音的影响．那么火车在铁路MN上沿ON方向以72千米/时的速度行驶时，A处受噪音影响的时间为（）A．12秒B．16秒C．20秒D．30秒．6．在矩形ABCD中，AB＝3，BC＝4，则点A到对角线BD的距离为（）A．B．2C．D．7．如图，在△ABC中，D，E，F分别为BC，AC，AB边的中点，AH⊥BC于H，FD＝8，则HE等于（）A．20B．16C．12D．88．如图，在菱形ABCD中，M，N分别在AB，CD上，且AM＝CN，MN与AC交于点O，连接BO．若∠DAC＝28°，则∠OBC的度数为（）A．28°B．52°C．62°D．72°9．如图，点A，B为定点，定直线l∥AB，P是l上一动点，点M，N分别为PA，PB的中点，对下列各值：①线段MN的长；②△PAB的周长；③△PMN的面积；④直线MN，AB之间的距离；⑤∠APB的大小．其中会随点P的移动而变化的是（）A．②③B．②⑤C．①③④D．④⑤10．如图，正方形ABCB1中，AB＝1，AB与直线l的夹角为30°，延长CB1交直线l于点A1，作正方形A1B1C1B2，延长C1B2交直线1于点A2，作正方形A2B2C2B3，延长C2B3交直线l于点A3，作正方形A3B3C3B4…依此规律，则A2018A2018＝（）A．（）2018B．（）2018C．2（）2018D．2（）2018二、填空题：（本大题共6小题，每小题3分，共18分，只要求写出最后的结果11．若式子+有意义，则x的取值范围是．12．若x，y满足+|3x+y+m|＝0且y＜0，则m的取值范围是．13．在四边形ABCD中，AB∥CD，AD∥BC，如果∠B＝50°，则∠D＝．14．一个矩形的两条对角线所夹的锐角是60°，这个角所对的边长为20cm，则该矩形的面积为．15．如图，已知菱形的两条对角线分别为6cm和8cm，则这个菱形的高DE为cm．16．如图，Rt△ABC中，AB＝9，BC＝6，∠B＝90°，将△ABC折叠，使A点与BC的中点D重合，折痕为MN，则线段BN的长为．三、解答题（本大题共7小题，共62分，作答时应写出文字说明、推理依据、演算步骤）17．（8分）（1）÷2﹣×+4；（2）（+）2﹣（3+2）（3﹣2）18．（6分）已知实数m，n满足n＝，求的值．19．（8分）如图，在△ABC中，∠A＝45°，∠B＝30°，BC＝8，求∠ACB及AC、AB的长．20．（7分）如图，菱形ABCD的对角线AC、BD相交于点O，DE∥AC，AE∥BD．试判断四边形AODE的形状，并说明理由．21．（9分）已知a、b、c满足|a﹣|++（c﹣4）2＝0．（1）求a、b、c的值；（2）判断以a、b、c为边能否构成三角形？若能构成三角形，此三角形是什么形状？并求出三角形的面积；若不能，请说明理由．22．（12分）如图，在正方形ABCD中，E是AB上一点，F是AD延长线上一点，且DF＝BE．（1）求证：CE＝CF；（2）若点G在AD上，且∠GCE＝45°，则GE＝BE+GD成立吗？为什么？23．（12分）如图1，在正方形ABCD中，P是对角线BD的一点，点E在AD的延长线上，且PA ＝PE，PE交CD于点F．（1）求证：PC＝PE；（2）若PD＝DE，求证：BP＝BC；（3）如图2把正方形ABCD改为菱形ABCD，其它条件不变，当∠ABC＝120°时，连接CE，∠BAP与∠DCE有何数量关系？证明你的结论．2018-2019学年广东省广州市海珠区八年级（下）期中数学试卷参考答案与试题解析一、选择题（本大题共10小题，每小题2分，共20分．在每小题给出的四个选项中，只有一个符合题意）1．下列运算正确的是（）A．+＝B．•＝C．＝D．＝3【分析】利用二次根式的加减法对A进行判断；根据二次根式的乘法法则对B进行判断；根据二次根式的除法法则对C进行判断；根据二次根式的性质对D进行判断．【解答】解：A、与不能合并，所以A选项错误；B、原式＝＝，所以B选项正确；C、原式＝，所以C选项错误；D、原式＝＝2，所以D选项错误．故选：B．【点评】本题考查了二次根式的混合运算：先把二次根式化为最简二次根式，然后进行二次根式的乘除运算，再合并即可．在二次根式的混合运算中，如能结合题目特点，灵活运用二次根式的性质，选择恰当的解题途径，往往能事半功倍．2．若，则（）A．b＞3B．b＜3C．b≥3D．b≤3【分析】等式左边为非负数，说明右边3﹣b≥0，由此可得b的取值范围．【解答】解：∵，∴3﹣b≥0，解得b≤3．故选D．【点评】本题考查了二次根式的性质：≥0（a≥0），＝a（a≥0）．3．若的整数部分为x，小数部分为y，则（x+）y的值是（）A．B．3C．D．﹣3【分析】先估算出的范围，再求出x、y的值，最后代入求出即可．【解答】解：∵2＜＜3，∴x＝2，y＝﹣2，∴（x+）y＝（2+）×（﹣2）＝7﹣4＝3，故选：B．【点评】本题考查了估算无理数的大小，能估算出的范围是解此题的关键．4．下列给出的条件中，不能判断四边形ABCD是平行四边形的是（）A．AB∥CD，AD＝BC B．∠A＝∠C，∠B＝∠DC．AB∥CD，AD∥BC D．AB＝CD，AD＝BC【分析】直接根据平行四边形的判定定理判断即可．【解答】解：平行四边形的定义：两组对边分别平行的四边形叫做平行四边形．∴C能判断，平行四边形判定定理1，两组对角分别相等的四边形是平行四边形；∴B能判断；平行四边形判定定理2，两组对边分别相等的四边形是平行四边形；∴D能判定；平行四边形判定定理3，对角线互相平分的四边形是平行四边形；平行四边形判定定理4，一组对边平行相等的四边形是平行四边形；故选：A．【点评】此题是平行四边形的判定，解本题的关键是掌握和灵活运用平行四边形的5个判断方法．5．如图，铁路MN和公路PQ在点O处交汇，∠QON＝30°．公路PQ上A处距O点240米．如果火车行驶时，周围200米以内会受到噪音的影响．那么火车在铁路MN上沿ON方向以72千米/时的速度行驶时，A处受噪音影响的时间为（）A．12秒B．16秒C．20秒D．30秒．【分析】过点A作AC⊥ON，利用锐角三角函数的定义求出AC的长与200m相比较，发现受到影响，然后过点A作AD＝AB＝200m，求出BD的长即可得出居民楼受噪音影响的时间．【解答】解：如图：过点A作AC⊥ON，AB＝AD＝200米，∵∠QON＝30°，OA＝240米，∴AC＝120米，当火车到B点时对A处产生噪音影响，此时AB＝200米，∵AB＝200米，AC＝120米，∴由勾股定理得：BC＝160米，CD＝160米，即BD＝320米，∵72千米/小时＝20米/秒，∴影响时间应是：320÷20＝16秒．故选：B．【点评】本题考查的是点与圆的位置关系，根据火车行驶的方向，速度，以及它在以A为圆心，200米为半径的圆内行驶的BD的弦长，求出对A处产生噪音的时间，难度适中．6．在矩形ABCD中，AB＝3，BC＝4，则点A到对角线BD的距离为（）A．B．2C．D．【分析】本题只要根据矩形的性质，利用面积法来求解．＝×3×4＝6，【解答】解：因为BC＝4，故AD＝4，AB＝3，则S△DBC＝×5AE，故×5AE＝6，AE＝．又因为BD＝＝5，S△ABD故选：A．【点评】本题考查矩形的性质，矩形具有平行四边形的性质，又具有自己的特性，要注意运用矩形具备而一般平行四边形不具备的性质．7．如图，在△ABC中，D，E，F分别为BC，AC，AB边的中点，AH⊥BC于H，FD＝8，则HE等于（）A．20B．16C．12D．8【分析】利用三角形中位线定理知DF＝AC；然后在直角三角形AHC中根据“直角三角形斜边上的中线等于斜边的一半”即可将所求线段EH与已知线段DF联系起来了．【解答】解：∵D、F分别是AB、BC的中点，∴DF是△ABC的中位线，∴DF＝AC（三角形中位线定理）；又∵E是线段AC的中点，AH⊥BC，∴EH＝AC，∴EH＝DF＝8．故选：D．【点评】本题综合考查了三角形中位线定理、直角三角形斜边上的中线．三角形的中位线平行于第三边且等于第三边的一半．8．如图，在菱形ABCD中，M，N分别在AB，CD上，且AM＝CN，MN与AC交于点O，连接BO．若∠DAC＝28°，则∠OBC的度数为（）A．28°B．52°C．62°D．72°【分析】根据菱形的性质以及AM＝CN，利用ASA可得△AMO≌△CNO，可得AO＝CO，然后可得BO⊥AC，继而可求得∠OBC的度数．【解答】解：∵四边形ABCD为菱形，∴AB∥CD，AB＝BC，∴∠MAO＝∠NCO，∠AMO＝∠CNO，在△AMO和△CNO中，∵，∴△AMO≌△CNO（ASA），∴AO＝CO，∵AB＝BC，∴BO⊥AC，∴∠BOC＝90°，∵∠DAC＝28°，∴∠BCA＝∠DAC＝28°，∴∠OBC＝90°﹣28°＝62°．故选：C．【点评】本题考查了菱形的性质和全等三角形的判定和性质，注意掌握菱形对边平行以及对角线相互垂直的性质．9．如图，点A，B为定点，定直线l∥AB，P是l上一动点，点M，N分别为PA，PB的中点，对下列各值：①线段MN的长；②△PAB的周长；③△PMN的面积；④直线MN，AB之间的距离；⑤∠APB的大小．其中会随点P的移动而变化的是（）A．②③B．②⑤C．①③④D．④⑤【分析】根据三角形的中位线平行于第三边并且等于第三边的一半可得MN＝AB，从而判断出①不变；再根据三角形的周长的定义判断出②是变化的；确定出点P到MN的距离不变，然后根据等底等高的三角形的面积相等确定出③不变；根据平行线间的距离相等判断出④不变；根据角的定义判断出⑤变化．【解答】解：∵点A，B为定点，点M，N分别为PA，PB的中点，∴MN是△PAB的中位线，∴MN＝AB，即线段MN的长度不变，故①错误；PA、PB的长度随点P的移动而变化，所以，△PAB的周长会随点P的移动而变化，故②正确；∵MN的长度不变，点P到MN的距离等于l与AB的距离的一半，∴△PMN的面积不变，故③错误；直线MN，AB之间的距离不随点P的移动而变化，故④错误；∠APB的大小点P的移动而变化，故⑤正确．综上所述，会随点P的移动而变化的是②⑤．故选：B．【点评】本题考查了三角形的中位线平行于第三边并且等于第三边的一半，等底等高的三角形的面积相等，平行线间的距离的定义，熟记定理是解题的关键．10．如图，正方形ABCB1中，AB＝1，AB与直线l的夹角为30°，延长CB1交直线l于点A1，作正方形A1B1C1B2，延长C1B2交直线1于点A2，作正方形A2B2C2B3，延长C2B3交直线l于点A3，作正方形A3B3C3B4…依此规律，则A2018A2018＝（）A．（）2018B．（）2018C．2（）2018D．2（）2018【分析】由四边形ABCB1是正方形，得到AB＝AB1＝1，AB∥CB1，于是得到AB∥A1C，根据平行线的性质得到∠CA1A＝30°，解直角三角形得到A1B1＝，AA1＝2，同理：A2A3＝2（）2，A3A4＝2（）3，找出规律A n A n+1＝2（）n，答案即可求出．【解答】解：∵四边形ABCB1是正方形，∴AB＝AB1＝1，AB∥CB1，∴AB∥A1C，∴∠CA1A＝30°，∴A1B1＝AB1＝，AA1＝2AB1＝2，∴A1B2＝A1B1＝，∴A1A2＝2A1B2＝2，同理：A2A3＝2（）2，A3A4＝2（）3，…∴A n A n+1＝2（）n，∴A2018A2018＝2（）2018，故选：C．【点评】本题考查了正方形的性质，含30°直角三角形的性质，平行线的性质，熟记各性质并求出后一个正方形的边长是前一个正方形的边长的倍是解题的关键．二、填空题：（本大题共6小题，每小题3分，共18分，只要求写出最后的结果11．若式子+有意义，则x的取值范围是x＞﹣2且x≠1．【分析】直接利用二次根式有意义的条件以及分式有意义的条件分析得出答案．【解答】解：若式子+有意义，则x+2≥0，且（x﹣1）（x+2）≠0，解得：x＞﹣2且x≠1．故答案为：x＞﹣2且x≠1．【点评】此题主要考查了二次根式有意义的条件以及分式有意义的条件，正确把握相关定义是解题关键．12．若x，y满足+|3x+y+m|＝0且y＜0，则m的取值范围是m＞6．【分析】根据非负数的性质列方程求出x的值并表示出y，再根据y＜0列出关于m的不等式，然后求解即可．【解答】解：由题意得，x+2＝0，3x+y+m＝0，解得x＝﹣2，y＝6﹣m，∵y＜0，∴6﹣m＜0，∴m＞6．故答案为：m＞6．【点评】本题考查了非负数的性质：几个非负数的和为0时，这几个非负数都为0．13．在四边形ABCD中，AB∥CD，AD∥BC，如果∠B＝50°，则∠D＝50°．【分析】首先根据两组对边分别平行的四边形是平行四边形可判定出四边形ABCD是平行四边形，再根据平行四边形两组对角相等可得∠B＝∠D＝50°．【解答】解：∵AB∥CD，AD∥BC，∴四边形ABCD是平行四边形，∴∠B＝∠D＝50°，故答案为：50°．【点评】此题主要考查了平行四边形的判定与性质，关键是掌握平行四边形的判定定理与性质定理．14．一个矩形的两条对角线所夹的锐角是60°，这个角所对的边长为20cm，则该矩形的面积为400cm2．【分析】本题首先求证由两条对角线的所夹锐角为60°的角的为等边三角形，易求出短边边长．【解答】解：∵已知矩形的两条对角线所夹锐角为60°，矩形的对边平行且相等．∴根据矩形的性质可求得由两条对角线所夹锐角为60°的三角形为等边三角形．又∵这个角所对的边长为20cm，所以矩形短边的边长为20cm．∴对角线长40cm．根据勾股定理可得长边的长为20cm．∴矩形的面积为20×20＝400cm2．故答案为400cm2．【点评】本题考查的是矩形的性质（对角线相等），先求出短边边长后根据勾股定理可求出长边边长，最后可求出矩形的面积．15．如图，已知菱形的两条对角线分别为6cm和8cm，则这个菱形的高DE为 4.8cm．【分析】直接利用勾股定理得出菱形的边长，再利用菱形的面积求法得出答案．【解答】解：∵菱形的两条对角线分别为6cm和8cm，∴菱形的边长为：＝5（cm），设菱形的高为：xcm，则5x＝×6×8，解得：x＝4.8．故答案为：4.8．【点评】此题主要考查了菱形的性质，正确得出菱形的边长是解题关键．16．如图，Rt△ABC中，AB＝9，BC＝6，∠B＝90°，将△ABC折叠，使A点与BC的中点D重合，折痕为MN，则线段BN的长为4．【分析】设BN＝x，则由折叠的性质可得DN＝AN＝9﹣x，根据中点的定义可得BD＝3，在Rt △BND中，根据勾股定理可得关于x的方程，解方程即可求解．【解答】解：设BN＝x，由折叠的性质可得DN＝AN＝9﹣x，∵D是BC的中点，∴BD＝3，在Rt△BND中，x2+32＝（9﹣x）2，解得x＝4．故线段BN的长为4．故答案为：4．【点评】此题考查了翻折变换（折叠问题），折叠的性质，勾股定理，中点的定义以及方程思想，综合性较强．三、解答题（本大题共7小题，共62分，作答时应写出文字说明、推理依据、演算步骤）17．（8分）（1）÷2﹣×+4；（2）（+）2﹣（3+2）（3﹣2）【分析】（1）先把二次根式化为最简二次根式，再利用二次根式的乘除法则运算，然后化简后合并即可；（2）利用完全平方公式和平方差公式计算．【解答】解：（1）原式＝4÷2﹣3×+2＝2﹣3+2＝2﹣；（2）原式＝2+2+3﹣（18﹣12）＝5+2﹣6＝2﹣1．【点评】本题考查了二次根式的混合运算：先把二次根式化为最简二次根式，然后进行二次根式的乘除运算，再合并即可．在二次根式的混合运算中，如能结合题目特点，灵活运用二次根式的性质，选择恰当的解题途径，往往能事半功倍．18．（6分）已知实数m，n满足n＝，求的值．【分析】根据二次根式有意义的条件即可求出答案．【解答】解：由题意可知：∴m＝﹣2，∴n＝＝0∴＝0【点评】本题考查二次根式有意义的条件，解题的关键是熟练运用二次根式有意义的条件，本题属于基础题型．19．（8分）如图，在△ABC中，∠A＝45°，∠B＝30°，BC＝8，求∠ACB及AC、AB的长．【分析】根据三角形的内角和定理可得出∠ACB的度数，过点C作CD⊥AB与点D，在RT△CDB 中先求出CD、BD的长，然后在RT△ACD中可求出AD的长，继而根据AB＝AD+DB可求出AB 的长．【解答】解：∠ACB＝180°﹣∠A﹣∠B＝105°，过点C作CD⊥AB于点D，在RT△ACD中，CD＝BC sin∠B＝4，BD＝BC cos∠B＝4，在RT△ACD中，AD＝CD tan∠A＝4，AC＝＝4，∴AB＝AD+BD＝4+4．综上可得∠ACB＝105°，AC＝4，AB＝4+4．【点评】本题考查解直角三角形的应用，对于此类题目一般要先构造直角三角形，作高是最直接的手段，难点在于找到过度线段CD的长．20．（7分）如图，菱形ABCD的对角线AC、BD相交于点O，DE∥AC，AE∥BD．试判断四边形AODE的形状，并说明理由．【分析】根据题意可判断出四边形AODE是平行四边形，再由菱形的性质可得出AC⊥BD，即∠AOD＝90°，继而可判断出四边形AODE是矩形．【解答】解：四边形AODE是矩形．∵DE∥AC，AE∥BD，∴四边形AODE是平行四边形，∵四边形ABCD是菱形，∴AC⊥BD∴∠AOD＝90°，∴四边形AODE是矩形．【点评】本题考查了菱形的性质及矩形的判定，解答本题的关键是掌握菱形对角线互相垂直的性质及矩形的判定定理．21．（9分）已知a、b、c满足|a﹣|++（c﹣4）2＝0．（1）求a、b、c的值；（2）判断以a、b、c为边能否构成三角形？若能构成三角形，此三角形是什么形状？并求出三角形的面积；若不能，请说明理由．【分析】（1）根据非负数的性质得到方程，解方程即可得到结果；（2）根据三角形的三边关系，勾股定理的逆定理判断即可．【解答】解：（1）∵a、b、c满足|a﹣|++（c﹣4）2＝0．∴|a﹣|＝0，＝0，（c﹣4）2＝0．解得：a＝，b＝5，c＝4；（2）∵a＝，b＝5，c＝4，∴a+b＝+5＞4，∴以a、b、c为边能构成三角形，∵a2+b2＝（）2+52＝32＝（4）2＝c2，∴此三角形是直角三角形，＝＝．∴S△【点评】本题考查了勾股定理的逆定理，非负数的性质，求三角形的面积，熟练掌握勾股定理的逆定理是解题的关键．22．（12分）如图，在正方形ABCD中，E是AB上一点，F是AD延长线上一点，且DF＝BE．（1）求证：CE＝CF；（2）若点G在AD上，且∠GCE＝45°，则GE＝BE+GD成立吗？为什么？【分析】（1）由DF＝BE，四边形ABCD为正方形可证△CEB≌△CFD，从而证出CE＝CF．（2）由（1）得，CE＝CF，∠BCE+∠ECD＝∠DCF+∠ECD即∠ECF＝∠BCD＝90°又∠GCE ＝45°所以可得∠GCE＝∠GCF，故可证得△ECG≌△FCG，即EG＝FG＝GD+DF．又因为DF ＝BE，所以可证出GE＝BE+GD成立．【解答】（1）证明：在正方形ABCD中，∵，∴△CBE≌△CDF（SAS）．∴CE＝CF．（2）解：GE＝BE+GD成立．理由是：∵由（1）得：△CBE≌△CDF，∴∠BCE＝∠DCF，∴∠BCE+∠ECD＝∠DCF+∠ECD，即∠ECF＝∠BCD＝90°，又∵∠GCE＝45°，∴∠GCF＝∠GCE＝45°．∵，∴△ECG≌△FCG（SAS）．∴GE＝GF．∴GE＝DF+GD＝BE+GD．【点评】本题主要考查证两条线段相等往往转化为证明这两条线段所在三角形全等的思想，在第二问中也是考查了通过全等找出和GE相等的线段，从而证出关系是不是成立．23．（12分）如图1，在正方形ABCD中，P是对角线BD的一点，点E在AD的延长线上，且PA ＝PE，PE交CD于点F．（1）求证：PC＝PE；（2）若PD＝DE，求证：BP＝BC；（3）如图2把正方形ABCD改为菱形ABCD，其它条件不变，当∠ABC＝120°时，连接CE，∠BAP与∠DCE有何数量关系？证明你的结论．【分析】（1）欲证明PC＝PE，只要证明△ADP≌△CDP即可．（2）只要证明∠BPC＝∠BCP即可．（3）结论：∠BAP＝∠DCE，只要证明△PCE是等边三角形即可解决问题．【解答】（1）证明：∵四边形ABCD是正方形，∴AD＝CD，∠ADP＝∠CDP，在△ADP和△CDP中，，∴△ADP≌△CDP∴PA＝PC，∵PA＝PE，∴PC＝PE．（2）证明：四边形ABCD为正方形，∴∠ADC＝∠CDE＝90°，∴∠E+∠DFE＝90°，∵PA＝PE，∴∠PAD＝∠E，由（1）知△ADP≌△CDP，∴∠PAD＝∠PCD，∴∠PCD＝∠E，∵∠PFC＝∠DFE，∴∠PCD+∠PFC＝∠E+∠DFE＝90°，∴∠CPE＝90°，∴∠BPC+∠DPE＝90°，∵PD＝DE，∴∠DPE＝∠E，∴∠DPE＝∠PCD，∵∠BCP+∠PCD＝90°，∴∠BPC＝∠BCP，∴BP＝BC．（3）∠BAP＝∠DCE，∵四边形ABCD是菱形，BD是对角线，∴AB＝BC，∠ABP＝∠PBC，∠BAD＝∠BCD，在△ABP和△CBP中，，∴△ABP≌△CBP，∴PA＝PC，∠BAP＝∠BCP，∴∠PAD＝∠PCD∵PA＝PE，∴PC＝PE，∠PAE＝∠PEA，∴∠PEA＝∠PCD，∵∠EFC＝∠CPE+∠PCD＝∠CDE+∠PEA，∴∠CPE＝∠CDE，∵四边形ABCD为菱形，∠ABC＝120°，∴∠BCD＝60°，∠ADC＝120°，∴∠CDE＝60°，∴∠CPE＝60°，∴△PCE是等边三角形，∴∠PCE＝60°，∴∠BCP＝∠DCE，∴∠BAP＝∠DCE．【点评】本题考查四边形综合题、正方形、菱形的性质、全等三角形的判定和性质，勾股定理等知识，正确寻找全等三角形是解题的关键，属于中考常考题型．。

2017-2018学年第二学期八年级英语期中模拟卷(2)(含答案)

2017-2018学年第二学期八年级英语期中模拟卷（2）一、单项填空(20分)( )1.—Have you ever listened to the weather report，David? Can we go on our trip?—Yes. It may rain this weekend, Gut we shall go .A. somewhereB. indeedC. anywayD. instead( )2. It is better to travel 10,000 miles than to read 10,000 books, so it's important to have real with languages, cultures and societies.A. communicationB. experienceC. knowledgeD. influence ( )3. Ben was helping his mother when the rain began to beat heavily the windows.A. belowB. acrossC. behindD. against( )4. You be Carol. You haven't changed a lot after all these years.A. mustB. canC. willD. shall( )5. I heard a new song on the radio. I high and low in the music store, but I can't find the song.A. searchB. have searchedC. am searchingD. will search( )6. , it is a good thing that I did not get the post，though I must admit(承认)that I was heart-broken at the time.A. By the wayB. In some waysC. In the wayD. In no way( )7. Dr Ma loves his job and he the lifestyle of a flying doctor.A. has used toB. was used toC. used toD. has been used to ( )8. Tom has that he lives a happy life.A. a so well-paid obB. such a well-paid jobC. so a well-paid workD. such a well-paid work( )9. Don't try to do everything at once. Take it a bit .A. at all timesB. at that timeC. at a timeD. at times( )10. We knew little about Shu-How Lin, a basketball player from New York Knicks, we watched the basketball matches in NBA.A. untilB. ifC. soD. because( )11.How lucky Peter was! Some policemen arrived in time and him out.A. tried to helpB. managed to he1pC. tried helpingD. succeeded to help( )12. ―You have never been to Japan, ?―. I've only been to the UK.A. have you;Yes, I haveB. haven't you; Yes, I haven'tC. have you;No, I haven'tD. haven't you; No, I have( )13. ―Lily, keep the window . The sandstorm hasn't stopped yet.―OK. I'll do that.A. closeB. closedC. openD. opened( )14. ―Have yo u ever been to Hong Kong?―Yes, . It's really a fun place.A. for two yearsB. twice alreadyC. five daysD. in two months( )15. ―I'm not sure where to buy the ticket.―Sorry, I've no idea, .A. eitherB. tooC. alsoD. so( )16. ―Are you doing well in your math?―No, I my best, but I still can′t get good marks.A. am tryingB. triedC. have triedD. will try( )17. She was n′t success as a teacher, and she didn't have success in life.A. a; manyB. a; muchC. much; aD. /;much( )18. ―Hello, Phil. Where is Luke now?―Maybe he to the library. But he here an hour ago.A. has gone; stayedB. has been; stayedC. has been; has stayedD. went;has stayed( )19. His home is 5 kilometres his school.A. on the south ofB. the south ofC. south ofD. in the south of( )20. ―do you the new film?―It's very interesting.A. What; likeB. How; think ofC. What; think ofD. How; is like二、完形填空((10分)It was the summer before my third grade. Our girls' softball team was facing real pitchers(投球手)for the first time. Before that, we could just hit the ball on the tee(球座). When the coach started pitching, hitting became 1 for me. I missed every single pitch. From the side, I heard my teammate Emily laughing at me. My face got hot and my throat felt like it had a softball stuck in. At that moment, I was starting to 2 playing softball.The next afternoon, when Mum said it was time to play the game, I told her I was 3 . She allowed me to lie down for a while. So I went to my room and 4 myself in bed. This was difficult for me because I was fine.Soon Mum came in and said, "Time to go!" She didn't even ask if I felt 5 . I imagined Emily laughing from the sideline, and 6 I really did feel sick to my stomach. I began crying loudly. Still, Mum pulled my team T-shirt over my head. She said, "You have to play for the rest of the season, and only after that we can talk about 7 you′ll continue next year." She added that practice was what I needed, not giving up. She promised to practice with me.I got two hits that afternoon, and Emily didn't make a 8 . Every week after that, I practiced at home 9 I got to be one of the best hitters on the team.That 10 taught me being afraid is part of life, and I can do whatever is expected of me if I keep working and practicing.( )1. A.noisy B. natural C. hard D. possible( )2. A.remember B. hate C. enjoy D. practice( )3. A.bored B. sick C. shy D. sad( )4. A.helped B. dressed C. threw D. taught( )5. A.safer B. better C. warmer D. happier( )6. ually B. probably C. carefully D. suddenly( )7. A.what B. where C. which D. whether( )8. A.plan B. sound C. choice D. decision( )9. A.until B. unless C. after D. though( )10. A.accident B. business C. relationship D. experience三、阅读理解(24分)AAlmost all animals need to sleep to stay healthy. But sleeping can also be dangerous because other animals may hurt those who are sleeping. This leads to many different ways of sleeping that help them stay safe. Some of these ways may surprise you!Almost all bats sleep upside down. They hang from a branch of a t ree or the ceiling of a cave. Up high, bats are safe from most other animals. If they are in danger, they just fly away.A dolphin sleeps with just half its brain at a time. It must stay awake to breathe and to watch for danger. Dolphin mothers and babies can go without sleep for as long as two months to stay safe.Some ducks sleep with just half their brains, too. These ducks often sleep in a line. The ducks at both ends help to keep the group safe. They keep one eye open to watch for danger. The ducksin the middle sleep deeply with both eyes closed.Seals breathe air, but that doesn’t stop some of them from sleeping underwater. They hold their breath and dive deep to sleep for up to twenty minutes at a time. Sleeping deep underwater helps these seals stay safe from animals that hunt them near the surface.Horses often sleep standing up. Their legs lock in place so they don’t fall over. If a horse is lying down, it needs a long time to get up. A horse can run from danger more quickly if it is already standing.A flamingo can sleep while standing on one leg. The standing leg locks so it stays straight. The other leg remains close to the flamingo’s body. Its head rests on its back. A flamingo lives (and sleeps) near many other birds to stay safe.Some seabirds can sleep while they fly. These large birds spend most of their lives over the ocean. They are in danger on the water, but they are safe in the air. They fly for many hours without flapping（拍打）their wings. Sometimes they sleep while they are flying.Would you like to sleep how they sleep?1. The animals that sleep with half their brains are _______.A. ducks and sealsB. dolphins and ducksC. bats and dolphinsD. flamingos and seabirds2. Horses often stand up when they sleep because _______.A. they can run from danger quicklyB. they are afraid of falling overC. this helps them to sleep deeplyD. it takes them a long time to go to sleep3. Which of the following can be the best title for the passage?A. How animals sleepB. Sleep to stay healthyC. Sleep as animals doD. What sleeping animals are likeBLizzie's diary from Antarctica(南极洲)Day 3:Tuesday December 2We planned to go to Rothera that morning. We'd be staying there for the next two weeks. Because Antarctica is the windiest place on earth，sometimes you can't fly at all.We had a nervous wait over breakfast to find out if we'd be leaving that day. People have to stay in Stanley for weeks while the pilots wait for good weather.It turned clear at 9:30 and we took off at 10:30 on a little red plane called a Dash-7. But even when we were in the air，there was still a chance we wouldn't be able to fly the whole day.Day 4:Wednesday December 3After waking up in the Antarctic for the first time today I can understand why everybody who comes here falls in love with the place. It is really beautiful.We're staying at Rothera Survey base with mountains of ice all around. It's about minus 2℃today, which for me is very cold, but the regulars(常客)here are often seen walking around in T-shirts!Day 5:Thursday December 4I woke up to another beautiful sunny day here in the Antarctic. I'm told it's a bit colder today，about minus 5℃，but it's not very windy so it feels warmer. Those of us who are new to the base have to do a special training course before we're allowed to go off base to other stations or to go snowboarding over the nearby hill.Day 7:Saturday December 6Not a cloud in the sky and it's warm enough to sit outside(in a jacket).The most amazing thing about this place is how the scenery(风景)changes every day. At first I thought I was going mad. I'd step outside in the morning and think，"I'm sure that big mountain of ice wasn't there yesterday." It's because the sea ice is always moving一slowly thankfully!4. Lizzie sat outside wearing a jacket on .A. TuesdayB. WednesdayC. ThursdayD. Saturday5. What could stop Lizzie from leaving Stanley for Rothera?A. Strong winds.B. Thick clouds.C. Mountains of ice.D. Low temperatures.6. How did Lizzie feel during her stay in the Antarctic?A. Afraid.B. Nervous.C. Amazed.D. Bored.7. What impressed Lizzie most about Rothera was that .A. people walked around in T-shirtsB. there was a special training courseC. the weather was sometimes warmD. the scenery changed every dayCNowadays more and more children seem to get lost in a "sea of digital(数字) technology". As they use digital technology too much, they are losing their ability to do simple things. They can't make toys themselves with hands or help Mum cook dinner. And worst of all, they seem to be losing interest in communicating with others."I have talked with a number of teachers. They care about the increasing numbers of young pupils who can play with computers or smart phones, but have few or no skills to make things." said a teacher, Colin Kinney. "Many pupils can't communicate with other pupils but their parents talk proudly of their ability to use a computer or a smart phone."Instead of playing with other children, more and more children are choosing to stay indoors and quietly play on a tablet (平板电脑)on weekends and fter scriool. How can a child grow up to be a very good artist if he doesn't learn how to use a paintbrush and develop his painting skill? How can a child learn to make friends as he gets older if he doesn't learn to communicate with others at a young age?Digital technology can be used for good or bad. We can use a stone to either break a window or build a house. We shouldn′t blame the children. We should help them make right choices. It is certainly necessary for children to know how to use digital technology in today's world, but whatis more important, we should encourage them to develop social abilities which will do them good when they grow up.8. What's the worst problem that is mentioned in the first paragraph?A. Children can't make things themselves.B. Children make too many friends online.C. Children don't want to communicate with others.D. Children don't like helping Mum cook meals at home.9. According to Colin Kinney, which of the following is TRUE?A. Teachers don't notice that young pupils have few skills to make things.B. Many parents are very happy that their kids can use digital technology.C. Many teachers don't care if young pupils can play computers or tablets.D. Some parents are worried that their kids use digital technology too much.10. What do many young children choose to do on weekends and after school?A. To play on a tablet indoors.B. To paint with their paintbrushes.C. To play with other children.D. To make friends with other children.11. What does the underlined word "blame" mean in Chinese?A.表扬B.原谅C.评价D.责怪12. What does the writer mainly want to tell us?A. It's very important for children to have social skills.B. It's very helpful for children to do some housework.C. It's necessary for parents to learn to use digital technology.D. It's difficult for teachers to make right choices for their pupils.四、词汇检测(10分)1. His last public concert will be on in Shanghai in a (几个)of months.2. He has much (经验)as an engineer.3. This writer (接到)thousands of letters every month in the past.4. She looked up for a while, and then (继续)writing her paper.5.—Where's Miss Ma? —She is answering an (国际的)call next door.6. There is not much water (污染)in the small village.7. (交流)between people from different countries used to be very hard.8.—How many fish have you caught?—So ，none. I'm afraid that we have no gift for fishing.9.—Jimmy, can you help me carry the box?—Mom, I need a rest. I'm really out after the basketball game.10.—You haven't seen your old friend for many years, have you?—No. But we phone each other from to time.五、句子翻译(15分)1.一本好的读物能帮助我们与他人交流。

2018-2019年人教版八年级下册期中考试英语试卷(附听力材料及答案)

2018-2019学年八年级英语第二学期期中测试卷时间：90分钟满分：100分第Ⅰ卷听力部分(20分)一、听句子，根据所听内容选择合适的图片(每小题1分，共5分)1．A. B. C.2．A. B. C.3．A. B. C.4．A. B. C.5．A. B. C.二、听小对话，选择最佳答案(每小题1分，共5分)6．Who are going to the airport?A．Lisa and Julie.B．Lisa and Emily.C．Emily and Julie. 7．What is Alex doing?A．Cleaning the classroom. B．Playing basketball. C．Playing ping-pong. 8．How was Sue's vacation in Australia?A．Awful. B．Boring. C．Great.9．Where is the boy buying a big house for his parents?A．In a big ci ty. B．In the countryside. C．On a beach.10．How long is the girl staying in Toronto?A．For three days. B．For five days. C．For eight days.三、听长对话，选择最佳答案(每小题1分，共5分)你将听到两段对话，在每段对话后有几个小题。

请在每小题所给的A、B、C三个选项中选出最佳选项。

听下面一段对话，回答11至12小题。

11．What does Ted want to be when he grows up?A．A computer player. B．A computer shop owner.C．A computer programmer.12．Where will Ted work?A．In his father's company. B．In hi s uncle's company.C．In his own company.听下面一段对话，回答13至15小题。

2017-2018学年度第二学期八年级下册期中数学试卷(有答案和解析)

2017-2018学年八年级（下）期中数学试卷一、选择题（本大题共10小题，共30.0分）1.在二次根式中，字母x的取值范围是（）A. B. C. D.2.若x=1是方程x2-ax+3=0的一个根，那么a值为（）A. 4B. 5C.D.3.下列计算正确的是（）A. B. C. D.4.A. 14，13B. 15，13C. 14，14D. 14，155.一个n边形的内角和等于它的外角和，则n=（）A. 3B. 4C. 5D. 66.某厂一月份生产某机器100台，计划二、三月份共生产280台．设二、三月份每月的平均增长率为x，根据题意列出的方程是（）A. B.C. D.7.如图O是边长为9的等边三角形ABC内的任意一点，且OD∥BC，交AB于点D，OF∥AB，交AC于点F，OE∥AC，交BC于点E，则OD+OE+OF的值为（）A. 3B. 6C. 8D. 98.关于x的方程（a-6）x2-8x+6=0有实数根，则a的取值范围是（）A. 且B. 且C.D. 且9.如图，在平面直角坐标系中，OABC的顶点A在x轴上，定点B的坐标为（6，4），若直线经过定点（1，0），且将平行四边形OABC分割成面积相等的两部分，则直线的表达式（）A. B. C. D.10.如图，在平行四边形ABCD中，AE平分∠BAD，交BC于点E，且AB=AE，延长AB与DE的延长线交于点F．下列结论中：①△ABC≌△EAD；②△ABE是等边三角形；③AD=AF；④S△ABE=S△CEF其中正确的是（）A. ①②③B. ①②④C. ②③④D. ①②③④二、填空题（本大题共6小题，共24.0分）11.标本-1，-2，0，1，2，方差是______．12.若整数满足，则的值为________．13.若x=-2是关于x的方程x2-2ax+8=0的一个根，则方程的另一个根为______．14.已知m是一元二次方程x2-9x+1=0的解，则=______．15.如图，某小区有一块长为30m，宽为24m的矩形空地，计划在其中修建两块相同的矩形绿地，它们的面积之和为480m2，两块绿地之间及周边有宽度相等的人行通道，则人行通道的宽度为______m．16.如图在△ABC中，∠BAC=30°，AB=AC=6，M为AC边上一动点（不与A，C重合），以MA、MB为一组邻边作平行四边形MADB，则平行四边形MADB的对角线MD的最小值是______．三、计算题（本大题共1小题，共8.0分）17.（1）已知x=2+，y=2-，求（+）（-）的值．（2）若的整数部分为a，小数部分为b，写出a，b的值并计算-ab的值．四、解答题（本大题共6小题，共58.0分）18.解方程：（1）2x2-x=0（2）（x-1）（2x+3）=1．19.某校初三对某班最近一次数学测验成绩（得分取整数）进行统计分析，将所有成绩由低到高分成五组，并绘制成如图的频数分布直方图，请结合直方图提供的信息，回答下列问题：（1）该班共有______名同学参加这次测验；（2）这次测验成绩的中位数落在______分数段内；（3）若该校一共有800名初三学生参加这次测验，成绩80分以上（不含80分）为优秀，估计该校这次数学测验的优秀人数是多少人？20.如图，在四边形ABCD中，AB=AD，CB=CD，对角线AC，BD相交于点O，下列结论中：①∠ABC=∠ADC；②AC与BD相互平分；③AC，BD分别平分四边形ABCD的两组对角；④四边形ABCD的面积S=AC•BD．（1）写出正确结论的序号；（2）证明所有正确的结论．21.银隆百货大楼服装柜在销售中发现：“COCOTREE”牌童装每件成本60元，现以每件100元销售，平均每天可售出20件．为了迎接“五•一”劳动节，商场决定采取适当的降价措施，以扩大销售量，增加盈利，尽量减少库存．经市场调查发现：如果每件童装降价1元，那么平均每天就可多销售2件．（1）要想平均每天销售这种童装盈利1200元，请你帮商场算一算，每件童装应定价多少元？（2）这次降价活动中，1200元是最高日利润吗？若是，请说明理由；若不是，请试求最高利润值．22.如图1，已知∠AOB，OA=OB，点E在OB边上，四边形AEBF是平行四边形．（1）请你只用无刻度的直尺在图中画出∠AOB的平分线．（保留作图痕迹，不要求写作法）（2）如图2，请再说出两种画角平分线的方法（要求画出图形，并说明你使用的工具和依据）23.如图，在△ABC中，AB＝AC＝13厘米，BC＝10厘米，AD⊥BC于点D，动点P从点A出发以每秒1厘米的速度在线段AD上向终点D运动，设动点运动时间为t秒．（1）求AD的长．（2）当P、C两点的距离为时，求t的值．（3）动点M从点C出发以每秒2厘米的速度在射线CB上运动．点M与点P同时出发，且当点P运动到终点D时，点M也停止运动．是否存在时刻t，使得S△PMD＝S△ABC？若存在，请求出t的值；若不存在，请说明理由．答案和解析1.【答案】B【解析】解：二次根式中，字母x的取值范围是：x-3＞0，解得：x＞3．故选：B．直接利用二次根式的性质分析得出答案．此题主要考查了二次根式有意义的条件，正确把握定义是解题关键．2.【答案】A【解析】解：把x=1代入x2-ax+3=0得1-a+3=0，解得a=4．故选：A．根据一元二次方程的解的定义把x=1代入x2-ax+3=0中得到关于a的方程，然后解关于a的一次方程即可．本题考查了一元二次方程的解：能使一元二次方程左右两边相等的未知数的值是一元二次方程的解．3.【答案】A【解析】解：A、-=2-=，故本选项正确．B、+≠，故本选项错误；C、×=，故本选项错误；D、÷==2，故本选项错误．故选：A．根据二次根式的加法及乘法法则进行计算，然后判断各选项即可得出答案．本题考查了二次根式的混合运算，难度不大，解答本题一定要掌握二次根式的混合运算的法则．4.【答案】A【解析】解：将这组数据按大小顺序，中间一个数为13，则这组数据的中位数是13；=（24+15+13+10+8）÷5=14．故选：A．根据中位数和平均数的定义求解即可．本题为统计题，考查平均数与中位数的意义，中位数是将一组数据从小到大（或从大到小）重新排列后，最中间的那个数（最中间两个数的平均数），叫做这组数据的中位数．5.【答案】B【解析】解：由题可知（n-2）•180=360，所以n-2=2，n=4．故选：B．利用等量关系式以及多边形内角和公式解答．根据题意列出方程即可．本题主要考查的是多边形的内角和与外角和，熟练掌握多边形的内角和与外角和公式是解题的关键．6.【答案】B【解析】【分析】主要考查增长率问题，一般用"增长后的量=增长前的量×（1+增长率）"，如果设二、三月份每月的平均增长率为x，根据“计划二、三月份共生产280台”，即可列出方程．本题可根据增长率的一般规律找到关键描述语，列出方程；平均增长率问题，一般形式为a（1+x）2=b，a为起始时间的有关数量，b为终止时间的有关数量．【解析】解：设二、三月份每月的平均增长率为x，则二月份生产机器为：100（1+x），三月份生产机器为：100（1+x）2；又知二、三月份共生产280台；所以，可列方程：100（1+x）+100（1+x）2=280．故选B．7.【答案】D【解析】【分析】根据等边三角形，平行线的性质，和平行四边形的判定，并根据等腰梯形性质求解．本题考查了等边三角形的性质，关键是利用了：1、等腰三角形的性质和判定：三边相等，三角均为60度，有两角相等且为60度的三角形是等边三角形；2、平行四边形的判定的性质；3、等腰梯形的判定和性质．【解答】解：延长OD交AC于点G，∵OE∥CG，OG∥CE，∴四边形OGCE是平行四边形，有OE=CG，∠OGF=∠C=60°，∵OF∥AB，∴∠OFG=∠A=60°，∴OF=OG，∴△OGF是等边三角形，∴OF=FG，∵OD∥BC，∴∠ADO=∠B=60°∴梯形OFAD是等腰梯形，有OD=AF，即OD+OE+OF=AF+FG+CG=AC=9．8.【答案】C【解析】解：当a-6=0时，原方程为-8x+6=0，解得：x=，∴a=6符合题意；当a-6≠0时，有，解得：a≤且a≠6．综上所述，a的取值范围为：a≤．故选：C．分a-6=0和a-6≠0两种情况考虑：当a-6=0时，通过解一元一次方程可得出原方程有解，进而可得出a=6符合题意（此时已经可以确定答案了）；当a-6≠0时，由二次项系数非零及根的判别式△≥0，即可得出关于a的一元一次不等式组，解之即可得出a的取值范围．综上即可得出结论．本题考查了根的判别式、一元二次方程的定义以及解一元一次方程，分a-6=0和a-6≠0两种情况考虑是解题的关键．9.【答案】C【解析】解：∵点B的坐标为（6，4），∴平行四边形的中心坐标为（3，2），设直线l的函数解析式为y=kx+b，则，解得，所以直线l的解析式为y=x-1．根据过平行四边形的中心的直线把平行四边形分成面积相等的两部分，先求出平行四边形中心的坐标，再利用待定系数法求一次函数解析式解答即可．本题考查了待定系数法求一次函数解析式，平行四边形的性质，熟练掌握过平行四边形的中心的直线把平行四边形分成面积相等的两部分是解题的关键．10.【答案】B【解析】解：∵四边形ABCD是平行四边形，∴AD∥BC，AD=BC，∴∠EAD=∠AEB，又∵AE平分∠BAD，∴∠BAE=∠DAE，∴∠BAE=∠BEA，∴AB=BE，∵AB=AE，∴△ABE是等边三角形；②符合题意；在∴△ABC≌△EAD（SAS）；①符合题意；∵△FCD与△ABC等底（AB=CD）等高（AB与CD间的距离相等），∴S△FCD=S△ABC，又∵△AEC与△DEC同底等高，∴S△AEC=S△DEC，∴S△ABE=S△CEF；④符合题意．若AD与AF相等，即∠AFD=∠ADF=∠DEC即EC=CD=BE即BC=2CD，题中未限定这一条件∴③不符合题意；∴①②④符合题意，故选：B．由平行四边形的性质得出AD∥BC，AD=BC，由AE平分∠BAD，可得∠BAE=∠DAE，可得∠BAE=∠BEA，得AB=BE，由AB=AE，得到△ABE是等边三角形，②正确；则∠ABE=∠EAD=60°，由SAS证明△ABC≌△EAD，①正确；由△FCD与△ABD等底（AB=CD）等高（AB与CD间的距离相等），得出S△FCD=S△ABD，由△AEC与△DEC同底等高，所以S△AEC=S△DEC，得出S△ABE=S△CEF．④正确．此题考查了平行四边形的性质、等边三角形的判定与性质、全等三角形的判定与性质．此题比较复杂，注意将每个问题仔细分析．11.【答案】2【解析】解：∵==0，∴方差S2=×[（1-0）2+（2-0）2+（0-0）2+（-1-0）2+（-2-0）2]=2．故答案为：2．先计算出平均数，再根据方差的公式计算．本题考查方差的定义：一般地设n个数据，x 1，x2，…x n的平均数为，则方差S2=[（x 1-）2+（x2-）2+…+（x n-）2]，它反映了一组数据的波动大小，方差越大，波动性越大，反之也成立．12.【答案】4【解析】解：∵2=，3=，∴整数n满足2＜n＜3，则n的值为=4．故答案为4．直接得出n最接近的二次根式，进而得出答案．此题主要考查了估算无理数的大小，正确将原数转化是解题关键．13.【答案】-4【解析】解：设方程的另一个根为x1，根据根与系数的关系有：-2x1=8，解得x1=-4．故答案为：-4．设出方程的另一个根，利用根与系数关系中的两根之积可以求出方程的另一个根．本题考查的是一元二次方程的解，知道方程的一个根，用根与系数关系中的两根的积可以求出方程的另一个根．14.【答案】17【解析】解：∵m是一元二次方程x2-9x+1=0的解，∴m2-9m+1=0，∴m2-7m=2m-1，m2+1=9m，∴=2m-1+=2（m+）-1，∵m2-9m+1=0，∴m≠0，在方程两边同时除以m，得m-9+=0，即m+=9，∴=2（m+）-1=2×9-1=17．故答案是：17．将x=m代入该方程，得m2-9m+1=0，通过变形得到m2-7m=2m-1，m2+1=9m；然后在方程m2-9m+1=0两边同时除以m，得到m+=9，代入即可求得所求代数式的值．此题主要考查了方程解的定义．此类题型的特点是：利用方程解的定义找到相等关系，再把所求的代数式化简后整理出所找到的相等关系的形式，再把此相等关系整体代入所求代数式，即可求出代数式的值．15.【答案】2【解析】解：设人行通道的宽度为x米，将两块矩形绿地合在一起长为（30-3x）m，宽为（24-2x）m，由已知得：（30-3x）•（24-2x）=480，整理得：x2-22x+40=0，解得：x1=2，x2=20，当x=20时，30-3x=-30，24-2x=-16，不符合题意舍去，即x=2．答：人行通道的宽度为2米．故答案为2．设人行通道的宽度为x米，将两块矩形绿地合在一起长为（30-3x）m，宽为（24-2x）m，根据矩形绿地的面积为480m2，即可列出关于x的一元二次方程，解方程即可得出x的值，经检验后得出x=20不符合题意，此题得解．本题考查了一元二次方程的应用，根据数量关系列出关于x的一元二次方程是解题的关键．16.【答案】3【解析】解：如图，作BH⊥AC于H．在Rt△ABH中，∵AB=6，∠BHA=90°，∠BAH=30°，∴BH=AB=3，∵四边形ADBM是平行四边形，∴BD∥AC，∴当DM⊥AC时，DM的值最小，此时DM=BH=3，故答案为3．如图，作BH⊥AC于H．因为四边形ADBM是平行四边形，所以BD∥AC，所以当DM⊥AC时，DM的值最小，此时DM=BH．本题考查直角三角形30度角性质、等腰三角形的性质、平行四边形的性质等知识，解题的关键是灵活运用所学知识解决问题，属于中考常考题型．17.【答案】解：（1）原式=-==，∵x=2+，y=2-，∴x+y=4、y-x=-2、xy=1，则原式==-8；（2）∵2＜＜3，∴a=2、b=-2，∴-ab=-2（-2）=+2-2+4=6-．【解析】（1）将原式变形为，再根据x、y的值计算出y+x、y-x、xy的值，继而代入可得；（2）由题意得出a、b的值，代入计算可得．本题主要考查二次根式的化简求值，解题的关键是掌握二次根式混合运算顺序和运算法则．18.【答案】解：（1）2x2-x=0，x（2x-）=0，则x=0或2x-=0，解得x1=0，x2=；（2）（x-1）（2x+3）=1，2x2+x-4=0，解得：x1=，x2=．【解析】（1）提取公因式x，即可得到x（2x-）=0，再解两个一元一次方程即可；（2）先转化为一般式方程，然后利用因式分解法解方程．本题考查了一元二次方程的解法．解一元二次方程常用的方法有直接开平方法，配方法，公式法，因式分解法，要根据方程的特点灵活选用合适的方法．19.【答案】40；70.5～80.5【解析】解：（1）根据题意得：该班参加这次测验的学生共有：2+9+10+14+5=40（名）；故答案为：40；（2）因为共有40个数，所以中位数是第20和21个数的平均数，所以这次测验成绩的中位数落在落70.5～80.5分数段内；故答案为：70.5～80.5；（3）根据题意得：该校这次数学测验的优秀人数是800×=380（人）．（1）把各分段的人数加起来就是总数；（2）根据中位数的定义得出中位数就是第20个和第21个的平均数，从而得出答案；（3）先算出40人中80分以上的人的优秀率，再乘以总人数即可．本题考查了频数分布直方图，解题的关键是能读懂统计图，从图中获得必要的信息，用到的知识点是中位数、频数、频率．20.【答案】解：（1）正确结论是①④，（2）①在△ABC和△ADC中，∵ ，∴△ABC≌△ADC（SSS），∴∠ABC=∠ADC，故①结论正确；②∵△ABC≌△ADC，∴∠BAC=∠DAC，∵AB=AD，∴OB=OD，AC⊥BD，而AB与BC不一定相等，所以AO与OC不一定相等，故②结论不正确；③由②可知：AC平分四边形ABCD的∠BAD、∠BCD，而AB与BC不一定相等，所以BD不一定平分四边形ABCD的对角；故③结论不正确；④∵AC⊥BD，∴四边形ABCD的面积S=S△ABD+S△BCD=BD•AO+BD•CO=BD•（AO+CO）=AC•BD．故④结论正确；【解析】①证明△ABC≌△ADC，可作判断；②③由于AB与BC不一定相等，则可知此两个选项不一定正确；④根据面积和求四边形的面积即可．本题考查了全等三角形的判定和性质、等腰三角形的性质，掌握全等三角形的判定方法是解题的关键，结论①可以利用等边对等角，由等量加等量和相等来解决．21.【答案】解：（1）设每件童装应降价x元，由题意得：（100-60-x）（20+2x）=1200，解得：x1=10，x2=20，因要减少库存，故取x=20，答：每件童装应定价80元．（2）1200不是最高利润，y=（100-60-x）（20+2x）=-2x 2+60x+800=-2（x-15）2+1250故当降价15元，即以85元销售时，最高利润值达1250元．【解析】（1）首先设每件降价x元，则每件实际盈利为（100-60-x）元，销售量为（20+2x）件，用每件盈利×销售量=每天盈利，列方程求解．为了扩大销售量，x应取较大值．（2）设每天销售这种童装利润为y，利用（1）中的关系列出函数关系式，利用配方法解决问题．此题考查了二次函数的应用以及一元二次方程的应用，利用基本数量关系：平均每天售出的件数×每件盈利=每天销售这种童装利润，进而列方程与函数关系解决实际问题．22.【答案】解：（1）如图2，OP为所作；（2）方法一：如图1，利用有刻度的直尺画出AB的中点M，则OM为∠AOB的平分线；方法二：如图3，利用圆规和直尺作∠AOB的平分线ON，【解析】（1）利用AB、EF，填空相交于点P，如图2，利用平行四边形的性质得到PA=PB，然后根据等腰三角形的性质可判断OP平分∠AOB；（2）方法一：如图1，利用有刻度的直尺和腰三角形的性质画图；方法二：如图3，利用圆规和直尺，根据基本作图作∠AOB的平分线ON．本题考查了基本作图：熟练掌握基本作图（作一条线段等于已知线段；作一个角等于已知角；作已知线段的垂直平分线；作已知角的角平分线；过一点作已知直线的垂线）．也考查了平行四边形的性质和等腰三角形的性质．23.【答案】解：（1）∵AB=AC=13，AD⊥BC，∴BD=CD=5cm，且∠ADB=90°，∴AD2=AC2-CD2∴AD=12cm．（2）AP=t，∴PD=12-t，在Rt△PDC中，PC=，CD=5，根据勾股定理得，PC2=CD2+PD2，∴29=52+（12-t）2，∴t=10或t=14（舍）．即：t的值为10s；（3）假设存在t，使得S△PMD=S△ABC．∵BC=10，AD=12，∴S△ABC=BC×AD=60，①若点M在线段CD上，即0≤t＜时，PD=12-t，DM=5-2t，由S△PMD=S△ABC，即（12-t）（5-2t）=，2t2-29t+43=0解得t1=（舍去），t2=②若点M在射线DB上，即＜t＜12．由S△PMD=S△ABC得（12-t）（2t-5）=，2t2-29t+77=0解得t=11或t=综上，存在t的值为s或 11s或s，使得S△PMD=S△ABC．【解析】（1）根据等腰三角形性质和勾股定理解答即可；（2）根据勾股定理建立方程求解即可；（3）根据题意列出PD、MD的表达式解方程组，由于M在D点左右两侧情况不同，所以进行分段讨论即可，注意约束条件．此题是三角形综合题，主要考查了等腰三角形的性质，勾股定理，三角形的面积公式，解本题的关键为利用三角形性质勾股定理以及分段讨论，在解方程时，注意解是否符合约束条件．。

广东版开心英语六年级下册期中考试试题含答案

广东版开心英语六年级下册期中考试试题含答案2017-2018学年第二学期六年级英语期中测试卷听力部分Part One 听力部分（共35分）一、听选单词、词组或句子。

（共10分，每小题1分）1.B2.A3.C4.A5.B6.C7.A8.A9.B 10.B二、听句子，选答语。

（共10分，每小题1分）11.C 12.B 13.A 14.C 15.A16.B 17.A 18.C 19.B 20.C三、听对话，回答问题。

（共10分，每小题2分）21.What is the boy doing now。

He is doing his homework.22.What did the girl do XXX。

XXX.23.How did the girl go to school this morning。

XXX.24.What did the boy do last night。

He watched TV.25.What is the girl going to do tomorrow。

She is going to visit her grandparents.四、听短文，判断正误。

（共5分，每小题1分）26.False 27.True 28.False 29.True 30.True笔试部分Part Two 笔试部分（共65分）一、单项选择。

（共15分，每小题1分）31.B 32.A 33.C 34.B 35.A36.C 37.A 38.B 39.C 40.B41.A 42.B 43.C 44.A 45.A二、完形填空。

（共10分，每小题1分）46.B 47.C 48.A 49.B 50.C51.A 52.C 53.B 54.A 55.B三、阅读理解。

（共20分，每小题2分）56.C 57.B 58.A 59.C 60.B61.A 62.B 63.C 64.B 65.A四、任务型阅读。

（共10分，每小题2分）66.make 67.XXX五、词汇运用。

2018-2019学年度第二学期期中英语考试试题(含答案)

2018—2019学年度第二学期期中考试七年级英语试题考试时间：90分钟满分： 150.分第I卷 (共80分)一、单项选择：(共30小题，计30分)( )1. --Where are the twin brothers?--Bob is playing guitar and Bill is playing basketball with his friends.A. the; /B. /; theC. the; theD. /; /( )2. --Can you ______ Chinese ?--No but I can ______stories.A. speak; tellB. speak ; talkC. say; tellD. talk ; say( )3. -- Are you good _____ children?--Yes I think I can help them ____ swimming.A. with; inB. with ; withC. at; withD. for ; with( )4. --_____ do you get up every day?--I get up _____ six.A. What time; inB. When; inC. What time; atD. When ; on( )5. --_____ your brother _____ his homework in the evening?--Yes he does.A. Does;doesB. Do ; doesC. Does; doD. Do ; do( )6.I go to school ____ bike and my sister goes to school _____ foot.A. by; byB. by; onC. on; onD. on ; by( )7.It’s raining all day so I ______ stay at home.A. mustB. have toC. must toD. can( )8.Miss Zhang is strict ____her students and she is strict ____ her work.A. in; inB. with; withC. in; withD. with ; in( )9.Tom _____ the school uniform on weekdays.A. put onB. wearsC. dressesD. puts on( )10.My work is interesting but _______ dangerous.A. a kind ofB. a kindC. kinds ofD. kind of( )11. --Do you believe that paper is made _____ wood?--Yes I do . And you can see that books are made _____ paper?A. from; fromB. from; ofC. of; fromD. of ; of( )12. --Where is your cousin?--He _____ an English exam now.A. hasB. hadC. has hadD. is having( )13. Who is better _______playing basketball you or your brother?A. atB. inC. onD. with( )14. It will _______the workers ten days to finish all the work.A. takeB. spendC. payD. cost( )15. --_______have you stayed in this city?--For more than 10 years.A. How farB. How soonC. How longD. How old( )16. --The TV in your room is still on.--Oh I forgot _______.A. turning it onB. turning it offC. to turn it offD. to turn it on( )17. --Don’t eat in class anymore.--_______.A. Yes you’re rightB. Sorry I won’tC. It doesn’t matterD. I don’t think so( )18. --is it from your home to school?--It’s about ten kilometers.A. How farB. How soonC. How oftenD. How long( )19. --How do you go to work?--I usually go to work _____.A. by a carB. in a carC. on a carD. by cars( )20.________late for school again.A. NotB. Not beC. Don’t beD. Aren’t( )21. People usually ______ "hello" to each other when they make a phone call.A. sayB. speakC. tellD. talk( )22--Here ______ some of my ______.A. is photosB. are photoesC. are photosD. is photos( )23.I like pandas _____ they are beautiful.A. soB. andC. becauseD. but( )24.My parents aren’t at home so I want to ____ you for help.A. showB. helpC. buyD. join( )25.My grandma often _____ jiaozi. Look! She _____ jiaozi for us.A. makes; is makingB. makes; makesC. is making; makesD. is making; is making( )26. --Hello! Is that Lucy ?-- _______.A.What can I do for you ?B. Sorry who are you?C. Yes it’s Lucy speakingD. No I’m not.( )27.There are about two ______ in this small village.A. hundred manB. hundreds manC. hundred menD. hundreds men( )28. It’s five o’clock. The students ________baxxxxseball on the playground.A. playB. playedC. are playingD. plays( )29. --Wow! You play the violin very well Bob.--_______.A. That sounds goodB. Thank youC. You’re so smartD. Not much( )30. --I think Jill is really nice.-- ______. I also want to make friends with her.A. Good luckB. Yes pleaseC. Sounds goodD. Yes you’re right二、完型填空(共10小题，计10分)阅读下面短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中选择能填入相应空白处的最佳选项。

2018学年度上学期广州二中应元期中八年级语文考试

2018学年度第一学期二中应元期中考试初二级语文科试卷（问卷）考试时长 120分钟试题总分 120分命题：邝思、谢淑芳、黄彦审题：古亦欢、邝思本试卷共8页，分三部分，共21小题，满分120分。

书写采用扣分形式考查，共5分。

注意事项：1.选择题的答案请按题号．．，用2B铅笔正确填在电脑答题卡上；非选择题答案请用黑色字迹的钢笔或者签字笔在答卷上作答。

作文写在作文卷上。

2.请保持答题卡和答卷整洁，不得使用涂改液或涂改带。

第一部分积累与运用(共37分)一、基础知识与运用(7小题，共22分)1.下列加点的词语注音全部正确的一项是（）（3分）A.溃．退（kuì）由衷．（chōnɡ）诘．责（jié）一丝不苟．（ɡǒu）B.要塞．（sài）紧绷．（bēnɡ）翘．首（qiào）藏污纳垢．（ɡòu）C.颁．发（bān）镌．刻（juān）妯．娌（zhóu）筋．疲力尽（jīn）D.酷似．（shì）私塾．（shú）锃．亮（zènɡ）悄．然而至（qiǎo）2.下列词语中没有．．错别字的一项是（）（3分）A. 督战凌空泻气屏息敛声B. 娴熟周济缰绳不辍劳作C. 桅杆畸形佃农抑扬顿措D. 窒息禁锢浩瀚眼花潦乱3. 下列各句中，加点成语运用正确的一项是（）（3分）A. 面对成绩不可骄傲自满，在困难压力面前也不能任劳任怨．．．．，相信只要坚持深化改革，广州必将迎来新的飞跃。

B. 马云表示，如果只是殚精竭虑．．．．地赚钱而不思考如何回馈社会，阿里巴巴就是一家没出息的公司。

C. 炒房者只交首付，然后把房子出租，利用租金还贷款，这属于典型的白手起．．．家．，有着很大的风险。

D. 岳飞在攻打伪齐政权的时候组建了最精锐的背嵬军，所到之处可谓是摧枯拉．．．朽．，最后大获全胜。

4. 下列句子中没有．．语病的一项是（）（3分）A. 随着人们对文化遗产保护意识的不断增强，粤剧的传承与发展迎来了难得的历史机遇。

广州市越秀区培正中学2018-2019学年第二学期期中考试初二年级英语试卷及参考答案

1 2 3 4 5 6A.beautifully; wellB.beautiful; wellC.beautifully; goodD.beautiful; good This kind of sweaters looks and sells .7 A.to go; doesn't needB.go; needn'tC.to go; needn'tD.going; doesn't need—Does he need there at once?—No, he leave so hurriedly because he has enough time.8 A.put off B.fell off C.set off D.take offOur headmaster for Beijing to attend an important meeting last week.9 A.can allow B.can't allow C.can be allowed D.can't be allowingIf you are over 18 years old, you to drive a car in our country.10 1. A.with B.for C.from D.inMary Poppins is a series of eight children's books by British author P .L. Traders. The bookswere published 1 1934 to 1988.They tell the story of a magical English nanny （保姆）named Mary Poppins.She 2 by the east wind to Cherry Tree Lane to look after the four children of the Banks family, including Jane, Michael and two baby twins. But unlike 3 nannies, Mary Poppins can move up banisters （楼梯扶手）, pull wonderful things out of 4 bag and even fly with an umbrella! From the moment Mary Poppins stepped through the Bank's door, the children's lives 5 amazing experiences. Some of their adventures include going to a tea party in a painting, finding a lost dog and spending 6 night at the zoo.The Mary Poppins books are suitable for all age groups. They're not only educational, 7 quite fun. P . L. Travers is a great author. Her writing style is unique （奇特的）because she includes detailed descriptions in stories. They are written in a fast-paced way.What I 8 like about P . L. Travers' writing is the advanced vocabulary that she uses in her stories. You have to work hard to understand 9 some of her sentenced mean. I suppose some readers might find it annoying to read. But I think it is a good way to make stories 10 and more fun.11二、语法选择（共10题，每题1分，共10分）2. A.blowB.blewC.is blownD.was blown 3. A.anotherB.otherC.othersD.the others 4. A.sheB.herC.hersD.herself 5. A.was full withB.was filled ofC.were filled withD.were fill of 6. A.aB.anC.theD./7. A.andB.alsoC.as wellD.but also 8. A.personB.personalC.personnelD.personally 9. A.whichB.whatC.whenD.why 10. A.moreinteresting B.interestingly C.more interested D.interested1. A.WaitB.learnC.forgetD.remember 2. A.deskB.chairC.flowerD.book 3. A.talkingB.stoppingC.movingD.continuing 4. A.restB.eatC.readD.sleep 5. A.quickB.richC.weakD.angry 6. A.armyB.parkC.schoolD.neighbourhood 7. A.fairness B.kindness C.shyness D.sadnessFew people enjoy taking walks quite like 95-year-old Harvey Djerf. He has been seentaking walks as long as anyone can 1 ."I've always liked to walk, " the World War Ⅱ veteran （老兵）says. "I feel better if I walk."Then one day, somebody put out a 2 for him."People saw me 3 and taking a break, " he says. "They thought that maybe Harvey needed a place to 4 ."And they were right. Harvey is getting 5 and needs to take a break from time to time.One day, another person in the 6 put out a chair. And then, another. Today, the neighbourhood is full of chairs."I'll just look out the window, 'Harvey's in the chair!' " says Ann Kleiner, a proud lady whose family put out a chair near the end of the driveway.The 7 doesn't end there. In winter when there is 8 , people will shovel a path （铲出一条路）to the chairs. And sometimes, when the weather's a little warmer, people will 9 him a fresh-cooked meal.Harvey is 10 thankful for the comfort of the chairs and the sense of community behind every one of them.12三、完形填空（共10题，每题1分，共10分）8. A.rainB.snowC.windD.cloud 9. A.sellB.showC.bringD.return 10. A.suddenly B.nearly C.hardly D.reallyComic books are not just easy books for kids. In both the East and the West, they are nowpart of our culture.In Japan, some primary school books use manga to help teach lessons. What's more, a university in Kyoto has a Manga Department. Students who take a class there will have Astro Boy on their reading list. Astro Boy , The cute robot with big eyes and black hair is still popular across the world. The creator of Astro Boy is Osamu Tezuka, who is known as the God of Manga. He also made Black Jack, one of the first medical comic books. Tezuka was a doctor himself, so he had the ability to make the stories real.Astro Boy and Black Jack started a new type for comic books in Japan. Tezuka once said that he believed that comics were able to be more than just making people laugh.Five years after Tezuka's death, a museum was built in memory of his life and his comic art. There, visitors can watch Tezuka's short films, enjoy his art, and learn about his life.Tezuka's drawings were once shown in Taipei's Chiang Kai-shek Memorial Hall in Taiwan.There were also human-sized models and 3D anime of the characters in his drawings on show.A visit there is like watching through the pages of his comic books.13 A.B.C.D.In Japan, if students take classes in the Manga Department, they should .have a model of the cute robotget the chance to enjoy the film of Astro Boyread the famous comic book Astro Boyget a picture of the cute robot（1）A.It has big eyes and black hair.B.It has round eyes and yellow hair.C.It has blue eyes.D.It has short blonde hair.What does Astro Boy look like?（2）A.Astro Boy B.Tezuka C.the God D.JackThe underlined word "He" in Paragraph 2 refers to .（3）A.B.C.D.Visitors can in the museum in memory of Tezuka in his home town.watch Tezuka's short films and learn to draw comicslearn about Tezuka's life and enjoy his short moviessee Tezuka's drawings and human-sized modelswalk through pages of Tezuka's comics and films（4）四、阅读理解（共20题，每题2分，共40分）A.B.C.D.Which of the following is NOT true according to the passage?Comic books are used as textbooks in schools in Japan.Astro Boy and Black Jack started a new kind of comic books in Japan.Tezuka could make Black Jack feel real because he was a doctor.Tezuka thought comics could be more than just making people laugh.（5）Pingshu, or storytelling, a Chinese traditional art form, has been popular mostly in northernChina. Speaking of it, we can't fail to mention Shan Tianfang. With a simple backdrop （usually a pair of screen doors ）, a table, a folding fan （折扇）and a piece of wood （known as xingmu ）, Shan won a large number of fans, as a "forever electric wave （电波）" .Shan Tianfang was born into a Quyi family in Yingkou, Liaoning Province in 1934. His grandparents and parents were either storytellers or Xihe Dagu （a kind of folk music ）singers.Influenced by his family, Shan could vividly （生动地）tell stories when he was only five to six years old.In 1953, Shan entered Northeast Engineering College but dropped out soon because of health problems. In the same year, Shan began to learn storytelling from Li Qinghai, an experienced storytelling artist. Soon Shan became famous in Anshan, Liaoning Province. The teahouses where Shan told stories were always very crowded.In 1957, to enrich his knowledge about history and literature （文学）, Shan attended some classes of Liaoning University's History Department, where he studied for three years.Whenever speaking of the decision . Shan said proudly, "It's impossible to achieve my later success without the three years' study."As many good storytelling materials were lost over time, Shan decided to write down all the stories he knew. In more than ten years, he finished nearly 50 storytelling novels, with more than 20 million words. Also, he started an art school, and especially opened classes of storytelling performance, hoping to educate more young storytellers to develop the art.On 11 September, 2018, Shan died in a hospital in Beijing at the age of 84.14 A.2 B.3 C.4 D.5How many things were needed when Shan Tianfang was telling stories?（1）A.Paragraph 1. B.Paragraph 2. C.Paragraph 3. D.Paragraph 4.Which paragraph talks about Shan's family background?（2）A.In 1953. B.In 1954. C.In 1955. D.In 1956.When did Shan begin to study under Li Qinghai?（3）A.starting an art schoolB.recording storytelling materialsC.studying in Liaoning UniversityD.learning storytelling from Li QinghaiThe underlined words "the decision" in Paragraph 4 refer to " " .（4）A.B.C.D.Which of the following about Shan is TRUE?He died in his home.He came from Anshan.He graduated from Northeast Engineering College.He spent over 10 years writing storytelling novels.（5） In January and February of 2016, a total of 13 young whales were washed up on the beachnear the town of Tönning in Germany. The young whales all died of heart trouble. The researchers believe that the young whales may have entered the North Sea by mistake. Since the sea floor here is not deep enough for these animals, it caused the whales to lose their way and their lives.While that is certainly sad, what is worse is the plastic that the scientists discovered inside the whales' stomachs （胃）. Among the man-made rubbish eaten by the young whales was the remains of a 13-meter long and 1.2-meter wide plastic safety net used for fishing. The scientists also found a big plastic cover from a car and some plastic bottles pieces.Though the plastic was not responsible for the death of the whales, the discovery shows the harmful result of our throwing plastic rubbish everywhere. Ursula Siebert, a scientist says, "If the whales had survived, the rubbish in their stomachs might have caused serious problems."Also, as the whales eat more rubbish, it may give them the wrong comfort of being full and reduce their desire to feed, resulting in illnesses.Whales are not the only animals hurt by the plastic waste in our oceans. Sea turtles （龟）also mistake the brightly-colored rubbish for food. As plastic rubbish stays in the animal's stomach, it results in building up gas and then the turtles can no longer dive deep into the ocean to look for food. Instead, they just move on the surface of the water and if not saved in time, they will die of hunger.According to researchers, in the past six to seven years, the number of sea animals' eating or taking in plastic has greatly increased. The scientists warn that even little plankton （浮游生物）， the food source （来源）for many sea animals, is taking in the rubbish.15 A.they were too hungry to live onB.they were too young to live aloneC.the water wasn't deep enoughD.the water was too dirty for themThe young whales all died of heart trouble because .（1）A.Many small fish.B.Nothing at all.C.Many bottles.D.Much plastic rubbish.What did the scientist find inside the whales' stomachs?（2）A.We can learn from the third paragraph that .plastic rubbish is bad for whales（3）B.C.D.the rubbish caused the death of the whaleswhales don't like carting plastic rubbishthe whales were kept in the fish netsA.They may die of the plastic rubbish.B.They would like to eat nothing else.C.The rubbish may build up gas.D.They can't swim any longer.What may happen if sea turtles eat plastic rubbish?（4）A.B.C.D.We can we learn from the last paragraph?We are trying our best to deal with the rubbish problem.The problem that sea animals eat plastic is serious.Little plankton really lives on big sea animals.Little plankton can't eat plastic rubbish at all.（5）As space science develops, man has learned more and more about space. Space is notonly amazing but also dangerous. While working in space, spacemen are facing danger as well as success.Scientists have found out that the radiation is the greatest danger to spacemen in space,When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won't be found until their children even grand children are born. Some special medicine may work a little, but no really effective medicine has been found so far.Space rubbish is also thought to be a great danger to spacemen. It's reported that there were 9, 000 human-made things flying in space. About 30% of these are satellite, 10% are spaceships, and the rest are space rubbish. An explosion in space in 1999 made a cloud of 300, 000 fragments , each at least 4 mm in size. A small piece of these even knocked a spaceship window and caused some damage .Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the earth. In the near future, it may become possible for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space in a few years. So we should do something to help improve the space environment.16 A. B. C. D.shows the man-made things in space in a correct way.（1）A.good B.helpful eful D.harmfulThe radiation from the sun and other stars is to spacemen.（2）A.碎片B.炮沫C.烟雾D.飞碟The underlined word "fragments" means in Chinese.（3）A.two B.three C.four D.fiveThe passage talks about kinds of danger in space.（4）A.B.C.D.Which of the following is TRUE?Scientists have found out ways to solve any problem in space.Every one of us can have a travel to space in ten years.The harm of the radiation may be found in the spacemen's children.Space is really dangerous, so it doesn't interest anyone on the earth.（5）A.B.C.D.E.The death of an orangutan （红毛大猩猩）in August broke the hearts of many people.1 He was one of the world's first apes （猿）to learn sign language.In 1979, when Chantek was just 9 months old, he was taken to the Uriversity of Tennessee in Chattanooga, US. Researcher Lyn Miles led an unusual experiment there 2 .The scientist then taught Chantek sign language. 3 He even came up with his own words, including "tomato toothpaste" for ketchup （番茄酱）. He was also taught other basic human skills, such as using a bathroom and cleaning his room.Chantek stayed at the university for 8 years. He sometimes even walked to classes with students. But in 1986, Chantek escaped from his room and frightened a student. 4 He spent 11 years there, living in a cage and becoming overweight and unhappy.Chantek was moved to the Atlanta Zoo in 1997, where he could finally go outside and swing from tree to tree.5 But he was too shy to do it with strangers.Miles visited Chantek often at the zoo. She said that Chantek still saw himself as half human, and called the zoo's other orangutans "orange dogs".On August 7, Chantek died of heart disease at the age of 39.The university had to send him to live in an animal center.Chantek was not an ordinary orangutan.She wanted to teach Chantek like a human child.The zoo said the orangutan often used sign language to "talk" with his caretakers.He learned at least 150 words in American Sign Language.17五、阅读填空（共5题，每题1分，共5分）六、单词拼写（共10题，每题1分，共10分）He is d . He lost one of his legs in an accident.18Everyone sang and danced with j in the party. How happy they were!19Frankie likes making noise in class. No one would like to a him as their group member.20You look pale and scared. What's the m with you?21I'll join you l because I have to finish my work first.22 A it was raining heavily, the students didn't stop running in the playground.23When you go into the room, you can see a nice painting which is h on the wall.24I'll never forget those p days I spent with you. I hope we can get together next time.25The people in the painting look real and they really a to be alive.26You can't wash the white shirt and the red one together. You must wash them s .27爷爷很老了，走路都有困难。

广州市天河区2018年-七年级第二学期-期中考试-英语卷

市天河区汇景实验学校2017学年第二学期英语期中测试卷本试卷共两部分，满分150分。

考试时间120分钟。

注意事项：1．答卷前，考生务必在答题卡上用黑色字迹的钢笔或签字笔填写自己的考生号、、试室号、座位号，再用2B铅笔把对应这两个的标号涂黑。

2．选择题每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需要改动，用橡皮擦干净后，再选涂其他答案。

不能答在试卷上。

3．非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题目指定区域的相应位置上；如需要改动，先划掉原来的答案，然后再写上新的答案，改动的答案也不能超出指定的区域；不准使用铅笔、圆珠笔和涂改液。

不按以上要求作答的答案无效。

4．考生必须保持答题卡的整洁，考试结束，将本试卷和答题卡一并交回。

听力部分（共三节，满分35分）一、听选句子（共5题；每小题2分；满分10分）请根据录音容选出你所听到的句子。

( ) 1. A. Water is useful.B. Water is valuable.C. Water is helpful.( ) 2. A. People can’t drink water from the sea.B. People can drink water from the sea.C. People can drink water from the river.( ) 3. A. Water travels through the pipes to many families.B. Water travels through the streets to many families.C. Water travels through the forest to many families.( ) 4. A. It’s not right for people to throw waste in daily life.B. It’s right for people to waste food in daily life.C. It’s not right for people to waste water in daily life.( ) 5. A. Harry took a boat to the city.B. Harry took a boat to the town.C. Harry took a bus to the city.二、听选理解（共10题；每小题2分；满分20分）请根据你所听到的容选择最佳答案。

2018-2019学年度第二学期二年级数学期中试题

.精选文档 .2018-2019 学年度第二学期二年级数学期中试题二年级下册期中测试卷一、填一填。

（每空 13 分）1.36 ÷ 4=9，读作 ( ) ，表示把36 均匀分红 ( ) 份，每份是( ) ，还可以够表示36 里面有() 个 4。

2.35 ÷7=5 中， ( ) 是被除数， ( ) 是除数， ( ) 是商。

3. 把 6×4=24 改写成两道除法算式是() 和( ) 。

4. 计算 81÷ 9 时，运用的口诀是 ( ) 。

5.摆一个正方形要用 4 根相同长的小棒，摆 5 个这样不相连的正方形要用 ( ) 根小棒，有 32 根小棒能够摆 ( ) 个这样不相连的正方形。

6.买一个木偶要 30 元，付 5 元一张的人民币要 ( ) 张。

二、判断。

( 对的画“√” ，错的画“×” ) （8）1.用“正”统计五月份的天气状况，一个“正”代表一天。

()2.计算 24÷ 6=□时，用的口诀是六七四十二。

( )3.36 个桃子分给9 个小朋友，每个小朋友分 4 个。

( )4.求 18 里面有几个 6。

列式为 :18 ÷3=6。

( )三、选一选。

（ 10）1. 被除数是 8 的算式是 ( )。

A.16 ÷ 8=2B.24÷ 3=8.8÷2=42.自水向下贱的现象是 ( ) 。

3.从 54 里连续减去 9，减 ( ) 次后结果等于 0。

A.45B.6 .94.依据七七四十九这句口诀能够写 ( ) 道算式。

A.2B.3 .45.以下图案中是轴对称图形的是 ( )A B四、我会算。

1、直接写得数（10）54÷9=54+6= 8 ÷ 8=64－ 8=80- （23+17）=24÷8= 28 ÷4= 5 × 7= 4 × 9÷ 6= 64 ÷ 8÷4=2、脱式计算（ 12）16+7× 983-26+4396-42 ÷ 764÷ 8÷23、在（）里填上“> ”“<”“ =”（10分）75-19 （） 56 3 × 8（） 6× 7 7 ÷7（） 7-763÷7×6（） 64÷ 8×7 14 ÷ 2×6（） 5×5+174、在（）里填上“+、 - 、×或÷”（ 5 分）32（） 4=8 6 （） 6=0 24 （） 6=30 5 （） 3=20（） 5 五、列式计算：（ 12 分）（1） 27 里面有几个 3？（2）除数是 4，被除数是 24，商是多少？（3）把 30 均匀分红 6 份，每份是多少？六、看图列式计算。

2018-2019学年七年级第二学期期中考试数学试卷及答案解析

2018-2019学年七年级第二学期期中考试数学试卷班级：座号姓名：分数：一、选择题：（本题共10个小题，每小题3分，共30分.在每小题列出的四个选项中，只有一个是正确的.）1．在下列四个汽车标志图案中，能用平移变换来分析其形成过程的图案是．B ．C．D．2. 下列运算正确的是（）A．B．C．D．3. 点P（m＋3, m＋1）在直角坐标系的x轴上，则点P坐标为（）A．（0，－2） B．（ 4，0） C．（ 2，0） D．（0，－4）4．下列所示的四个图形中，∠1和∠2是同位角的是（）5 .如图5能判定EB∥AC的条件是（）A．∠A=∠EBD B．∠C=∠ABC C．∠A=∠ABE D．∠C=∠ABE6．如图6，BC⊥AE于点C，CD∥AB，∠B=55°，则∠1等于（）A．35°B．45°C．55°D．65°7．图7，已知直线AB∥CD，BE平分∠ABC，∠CDE=140°，则∠C的度数为（）A．150°B．130°C．120°D．100°8.将△ABC各顶点的横坐标分别加上3，纵坐标不变，得到的△DEF相应顶点的坐标，则△DEF可以看成△ABC（）A．向左平移3个单位长度得到B．向右平移三个单位长度得到（图5）（图6）（图7）C ．向上平移3个单位长度得到D ．向下平移3个单位长度得到 2A （7，2）B （—1，2）C （3，6）D （7，2）或（—1，2）二、填空题：（本题共6个小题，每小题4分，共24分）11. 若电影院中的5排2号记为（5，2），则7排3号记为（，）12. 把命题“邻补角是互补的角”改写成“如果…那么…”的形式．13. 求161-的相反数的平方根是14．已知032=++-b a ，则______)(2=-b a ； 15．已知点M （5，-6）到x 轴的距离是_______ ． 16. 如图，AB ∥CD ，∠1=64°，FG 平分∠EFD ，则∠EGF= _________ °．三、解答题（一）（本大题3小题，每小题6分，共18分）17. 将下列各数填入相应的集合内．﹣，，﹣，0，﹣，，﹣，，3.14①有理数集合{ …}②无理数集合{ …}③负实数集合{ …}18．2+3﹣5﹣3． 19．4(X+5)2 =16四、解答题（二）（本大题3小题，每小题7分，共21分）。

2018—2019学年八年级英语第二学期期中考试试卷(含听力和答案)

2018—2019学年第二学期八年级英语期中考试试卷考试时间100分钟，总分100分第Ⅰ卷客观题（共65分）一、听力（20分）本部分共有10道小题，每小题你将听到一段对话，每段对话听两遍。

在听每段对话前，你将有5秒钟的时间阅读题目；听完后，你还有5秒钟的时间选择你认为最合适的备选答案。

在听到“滴”的信号后，进入下一小题。

1. Which sign does the man mean?A B C2. How will Tina go to Beijing?A B C3. What is Tom’s brother doing now?A B C4. Where has the woman been?A B C5. How does the man think of the book?A. BoringB. ScientificC. Humorous6. What are they doing at present?A. They are learning to cook.B. They are watching a play.C. They are having a party.7. What would the man like to drink?A. TeaB. JuiceC. Coffee8. What is Max doing?A. He is watching TV.B. He is reading a book.C. He is listening to music.9. Where is the bank?A. In front of a big market.B. Past a big market.C. Behind the post office.10. What will the two speakers do first?A. Find the new shirt and tie.B. Clean the wall.C. Paint the wall.听一段对话，回答第11—12小题。

统编版一年级语文下册期中测试卷(5)(含答案) 3份

班级学号姓名__________________________◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆装◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆订◆◆◆◆◆◆◆◆◆◆◆◆◆线◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆2018学年度第二学期期中质量检测卷小学一年级语文（学完1—－4组课文用时间：60分钟）☆看清想好再动笔，保持卷面整洁。

一、基础。

（82分） 1.抄写下面的字。

（3分）各走当也这样听风故生2.读拼音，写汉字。

（10分）gu ò hu ǒ qi ū y áng y ǐ （）去（）伴（）天太（）可（）m éi xi ān ɡ l è y òu k àn （）有故（）快（）左（）（）见3.用“/”划掉各组中不同类的一项。

（6分）（1）彩色、火红、碧绿、金黄、雪白（2）春天、景色、秋天、夏天、冬天（3）爸爸、哥哥、医生、妈妈、妹妹4.把两边合适的词语连起来。

（9分）讲音乐玩排球洁白的天山踢故事打游戏宽宽的公路听足球跳绳子美丽的雪莲5.把相应的序号填在括号里。

（8分）①辆②匹③支④棵⑤册⑥架⑦只⑧朵一（）书一（）飞机一（）树一（）铅笔一（）马一（）花一（）车一（）公鸡6.给下列每个字组两个词。

（12分）晴（）（）看（）（）音（）（）动（）（）国（）（）真（）（）7.请在多音字正确的读音下面画“”。

（6分）（1）我们得．（de děi）回家了，外面冷得．（de děi）很。

（2）门口没人，只．（zhīzhǐ）有一只．（zhīzhǐ）小狗在走来走去。

（3）我用种．（zhǒng zhòng）子种．（zhǒng zhòng）了一盆花。

8.音序查字法。

（6分）9.写出下列字正确的笔顺。

（12分）（1）再：（2）北：（3）这：（4）快：（5）走：（6）为：10.给下面的句子加上标点符号，写到横线上。

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2018学年第二学期广州中学期中测试卷八年级生物注意事项：1．全卷满分100分，40分钟内完成，闭卷。

2．答卷前，请用黑色字迹的钢笔或签字笔在答题卡的左上方填写姓名；再用2B铅笔在答题卡的右上方填写你的考号，并涂黑每个数字下方对应的小方框。

3．每小题选出答案后，用铅笔把答题卡上对应题目的答案标号涂黑。

如需要改动，用橡皮擦干净后，再选涂其他答案。

不能答在试题卷上。

4．非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题指定区域的相应位置；一、选择题：（单项选择，共35题每小题2分，共70分）1.下列各项中,属于有性生殖的是( )A. 克隆多莉羊B.柑桔的嫁接C.试管婴儿D.组织培养2.水蜜桃味甜,毛桃味酸,将水蜜桃的接穗接到毛桃的砧木上,结出成熟的果实,其味( )A.酸甜各半B.甜C.酸D.苦涩3.关于生物的生殖和发育的说法中,不准确的是( )A.植物的扦插、嫁接都属于无性生殖B.两栖动物的生殖和幼体发育必须在水中进行C.昆虫的发育过程都要经过卵、幼虫、蛹和成虫四个阶段D.兔的繁殖和哺育后代的方式与人类相似,具有胎生和哺乳的特征4. 生男生女的机会均等，其原因之一是（）A．含X染色体和含Y染色体的两种精子与卵细胞结合的机会均等B．含X染色体和含Y染色体的两种卵细胞与精子结合的机会均等C．精子有一种类型，而卵细胞存在两种类型D．雄性激素和雌性激素的作用机会均等5．对青蛙生殖发育特点描述正确的是：（）A. 雌雄同体，体内受精，体内发育B. 雌雄同体，体外受精，体外发育C. 雌雄异体，体内受精，变态发育D. 雌雄异体，体外受精，变态发育6．鸟卵的结构中相当于卵细胞的一组是（）A．卵黄膜、卵黄、胚盘B．卵壳膜、卵白、卵黄C．卵壳、卵壳膜、卵白、卵黄D．整个鸡卵7．当某人因意外事故突然停止呼吸和心跳时，应立即采取的措施是（）①立即拨打120 ②自己送往医院③进行人工呼吸④进行胸外心脏挤压A．①②③B．①②④C．①③④D．②③④8.下列选项中,属于相对性状的是( )A.狗的黑毛和卷毛B.小丽的双眼皮和小鸣的双眼皮C.棉花的白色和青椒的绿色D.小明的A型血和小丽的B型血、小菲的O型血9.同一生物体内,遗传物质不完全相同的细胞可能是( )A.神经元B.白细胞C.精子D.肌细胞10.如图为染色体和DNA的关系示意图。

下列说法错误的是( )A.①DNA中储存有遗传信息B.③主要由①和②组成C.③的每个片段就是一个基因D.人的体细胞中③成对存在11.某人因外伤出血，血色鲜红，血流猛急，紧急的急救方法是（）A、在受伤口的血管近心端，采用指压止血法或止血带止血法止血B、在受伤口的血管远心端，采用指压法或止血带止法止血C、在伤口处先消毒，再用消毒纱布包扎D、在伤口处用手紧紧按住12.如图表示一种培育生物优良新品种的方法,该方法称为( )A.杂交育种B.转基因技术C.克隆技术D.太空育种13.下列疾病中，不属于遗传病的是( )A.色盲B.血友病C.白化病D.呆小症14 . A、B、C、D是人类的四种疾病，专家调查结果如下表，你认为属于遗传病的是（）15.人类色盲基因位于X染色体上，某女子将该基因遗传给她孙子的概率是( )A.0B.1/4C.1/2D. 116．在人群中，生来就惯用右手与生来就惯用左手（不包括后天的矫正和练习）是一对相对性状。

父亲惯用左手，母亲惯用右手，他们生的孩子也是惯用右手的。

正常情况下，这个孩子的体细胞内有控制惯用左手的基因吗？以下推理正确的是A．若“惯用左手”为显性性状，则可能有B．若“惯用左手”为显性性状，则一定有C．若“惯用左手”为隐性性状，则一定有D．若“惯用左手”为隐性性状，则可能有17．已知马蛔虫体细胞内有2对染色体，结合下图分析正确的是A．④是体细胞，含有两对染色体，其中每条染色体一半来自父方，一半来自母方B．①是生殖细胞，生殖细胞中染色体是成对存在的C．②③是亲子代之间基因传递的“桥梁”D．染色体是由DNA和蛋白质组成，一条染色体上含有一个基因18.如图是豌豆的遗传图解。

若用“R”表示显性基因,“r”表示隐性基因,则图中子代高茎豌豆的基因组成为( )A.RRB.RrC.RR或RrD.rr19.人的性别决定于( )A.胎儿形成时期B.受精卵形成时期C.生殖系统发育时期D.精子形成时期20．在北京培育出的优质甘蓝品种，叶球最大的也只有 3.5 kg。

当引种到拉萨后，由于昼夜温差大，日照时间长，大多叶球可达7 kg左右，若再引种回北京，大多叶球又只有3.5 kg。

从上述甘蓝引种过程可以推测()A．甘蓝具有遗传性而不具有变异性 B．仅由环境条件引起的变异是不遗传的C．环境改变使生物产生定向的变异 D．甘蓝的形态发生变化不属于变异21.鸟类比爬行类、两栖类、鱼类复杂而高等，在繁殖方面表现为A．体外受精、卵生、哺乳B．筑巢、卵生、哺乳C．胎生、筑巢、育雏D．筑巢、孵卵、育雏22．关于生命起源和生物进化的下列叙述中，错误的是( )A．原始大气成分中不含氧气 B．原始生命诞生于原始海洋C．化石是研究生物进化的最直接证据 D．生物进化的方向与环境变化无关23．下图是未被破坏的地层示意图，图中表示两个地层中曾发掘出物种A和物种B(均为该地层中掘出的最高等的生物)的化石。

下列关于物种A、B的关系的叙述中正确的是( )①物种A比物种B结构复杂；②物种A比物种B结构简单；③在Ⅰ层里能找到物种B 的化石；④在Ⅱ层里能找到物种A的化石；⑤物种B的出现早于物种A；⑥物种B的出现晚于物种AA．①③⑥ B．①②⑥ C．②④⑤ D．①③⑤24、在农田中使用某种农药防治害虫，使用年数越长效果越差。

下列对这一现象的解释中，正确的是（）A．农药的质量越来越差B．农药使害虫发生了抵抗农药的变异C．农药选择了害虫中能抵抗农药的变异个体D．害虫会自然发生并巩固抵抗农药的变异25．用达尔文的自然选择学说观点判断，下列叙述中正确的是( )A．在有毒农药的长期作用下，农田害虫产生了抗药性B．野兔的保护色和鹰锐利的目光是它们长期相互选择的结果C．北极熊生活在冰天雪地的环境里，它们的身体就产生了白色变异D．长颈鹿经常努力伸长颈和前肢去吃树上的叶子，因此颈和前肢都变得很长26．郑氏始孔子鸟化石能证明有较近亲缘关系的两类生物是（）A．鱼类和两栖类 B．两栖类和爬行类C．爬行类和鸟类 D．鸟类和哺乳类27．脊椎动物进化的历程大致是（）A．鱼类→两栖类→爬行类→鸟类→哺乳类B．鱼类→两栖类→爬行类→哺乳类→鸟类C．古代鱼类→古代两栖类→古代爬行类→古代哺乳类D．古代鱼类→古代两栖类→古代爬行类→古代鸟类和哺乳类28．下列对幼儿园预防传染病措施的分类，不正确的是( )A．将患病孩子送回家治疗——控制传染源B．按规定给孩子接种疫苗——保护易感人群C．每天对教室消毒处理——切断传播途径D．要求孩子饭前便后洗手——保护易感人群29.艾滋病病毒主要破坏人体的A.免疫系统B.神经系统C.消化系统D.生殖系统30、如图是有关免疫的漫画，能形象表示人体第三道防线的是( )31．下列属于健康状态的是（）A．精力旺盛，一天只睡2~3小时即可B．没病没灾C．吃得饱，睡得好D．身体健康，心理健康，有良好的社会适应状态32．学校开展阳光体育活动，有利于增强学生体质，提高抵抗力预防传染病，该措施属于( ) A．控制传染源 B．切断传播途径C．保护易感人群 D．以上都是33．“乙肝”疫苗由乙肝病毒灭活制成。

注射“乙肝”疫苗的目的是( )A．注入抗体，控制传染源 B．注入抗原，进行非特异性免疫C．注入抗原，保护易感人群 D．注入抗体，切断传播途径34．生物进化的原因是（）A．过度繁殖 B．生物产生了有利的变异C．可遗传的有利变异 D．遗传、变异和自然选择的综合作用35．在正常情况下，人体能够识别并清除肿瘤细胞，这是由于免疫系统具有（）A.抵抗病原体侵入的功能B.清除体内衰老、死亡或损伤细胞的功能C.监视识别和清除体内产生的异常细胞的功能D.抗菌、消炎、抗病毒等作用二、简答题（30分，每空2分）36、（ 8分，请以图的编号作答）下图是豆天蛾发育的几个时期。

请据图回答：（1）将豆天蛾的发育过程按顺序排列 __________ ，这种发育属于 ___________ （写文字）。

（2）与豆天蛾相比，蝗虫不经过的发育时期是。

（3）豆天蛾对大豆危害最大的时期是。

37．（12分）如图是某家族成员的关系图谱，据图回答：（1）若5、6都是双眼皮，他们所生女儿9为单眼皮，则可判断出_________是显性性状。

若用D 、d 表示控制这对性状的显、隐性基因，则孩子9（单眼皮）的基因组成是_______。

实行二胎政策以后，若这对父母想再生一个双眼皮男孩的几率是_________。

（2）若3的双眼皮是经整容而获得的，则3的这种性状不能遗传给8，原因是这种整容后遗传物质没有_________ 。

（3）第三代7有一条染色体一定来源于第一代1，这条染色体是________染色体.（4）若7、8为一对龙凤胎，他们属于_________（填“直系”或“旁系”）血亲.38.（10分）广州曾相继出现H7N9禽流感病毒感染人事件，许多科研人员为了有效控制H7N9禽流感疫情，作了如下的实验：实验1 取活的H7N9禽流感病毒注射在一只健康鸡(A)的体内，不久，A 鸡死亡。

① ② ③ ④实验2 取灭活的H7N9禽流感病毒注射在另一只健康鸡(B)的体内，经过几周后，再取活的H7N9禽流感病毒注射在它的体内，结果B鸡存活下来。

(1)引发禽流感的病原体是_______。

(2)实验2中说明B鸡产生了抵抗H7N9禽流感病毒的________，B鸡产生的这种免疫从免疫类型上划分，应该属于________免疫。

实验1和2在探究实验中属于 ______________实验(3)某地发现人感染H7N9禽流感病毒后，立刻关闭了“活禽动物交易市场”，并把该市场内的鸡全部捕杀后进行焚烧或深埋，这些措施属于传染病预防措施中的_______________。