山西省2018-2019学年第二学期八年级阶段四质量评估试题·英语(人教版)·答案
一、情景反应（每小题1分，共5分）
1~5ACCBA
二、对话理解（每小题1分，共5分）
6~10CABCB
三、语篇理解（每小题1分，共5分）
11~15CAACB
四、听力填空（每小题1分，共5分）
16.thirty/3017.ancient18.lie19.Secondly20.tours
五、单项选择（每小题1分，共10分）
21~25ACBBC26~30ABABA
六、补全对话（每小题1分，共5分）
31~35AGBFD
七、完形填空（每小题1分，共10分）
36~40BAACA%%%%%%41~45ABABC
八、阅读理解（每小题2分，共50分）
（A）46~50AEBDC
（B）51~55BCBAC
（C）56~60CBFDE
（D）61.memory62.neither63.quickly64.happen65.stress （注：以上各题如与答案不一致，但与原文意思相符，且使用正确，可酌情给分。
）（E）66.生活不总是像我们想要的那么容易。
67.In2014.
68.（the song）Shake It Off
69.It is quite different from the country music that Swift was once known for./It
is catchy and cheerful.（答出一种即可）
70.%Baby%I’m%just%gonna%shake,%shake,%shake,%shake,%shake.%I%will%think%about%solutions%
to%solve%problems.%（开放性试题。
只要言之有理、表达正确即可得分。
）
（注：只要所给答案符合要求，且表述无误，即可得满分；如果所给答案符合要求，但表述有误，以5小题为单位，单词拼写错误累计4处扣1分，语法错误累计2处扣1分；第70小题言之有理且表述无误，即可得分；如所给答案不符合要求，不可得分。
）
九、词语运用（每小题1分，共10分）
71.But72.square73.showed74.to develop/developing75.most common
76.like77.especially78.them79.pictures80.have used
十、书面表达（共15分）
One possible version:
Nowadays,going to the museum becomes a more popular way to spend the weekend.As is shown in the chart,in2012only0.564billion people went to the museum.The number of visitors continuously increased to0.781billion.In2018,the number of visitors reached1.008 billion.
For me,I’m also the one who like to go to the st year,I went to the Palace Museum in Beijing.With the tour guide,I visited the museum and heard many stories about it.The works of art were so fascinating that I bought two souvenirs.They will remind me of the wonderful trip I took.I really hope more students will go to the museum to know about our ancient culture and history.It’s our duty to carry them forward.
评分说明：
13～15分：应用了较多的语法结构和词汇，用词准确、句子通顺、行文连贯、表达清楚、内容丰富，没有或有个别语法错误，具备较强的语言应用能力。
10～12分：应用的语法结构和词汇能满足任务要求，句子较通顺，表达较清楚，但内容欠丰富，有少量语法错误。
7～9分：语言表达简单，行文不够连贯，句子不够通顺，内容不够丰富，有部分语法错误。
4～6分：内容过少，语言不规范，句子不条理，行文不连贯，语法错误较多。
0～3分：未完成所规定的任务，语言很不通顺，用词很不准确，错误过多，几乎难以读懂。
注：词数不足酌情扣1～2分。
山西省2018-2019学年第二学期八年级阶段四质量评估试题
英语（人教版）参考答案和评分标准
八年级英语（人教版）答案第２页（共2页）八年级英语（人教版）答案第１页（共2页）。
人教新目标2018-2019学年度下学期第二次质量检测八年级英语试卷
2018-2019学年度下学期第二次质量检测八年级英语试卷一、单项选择1.In this book, he tells of the ________ good decisions.A．important to make B．importance of make C．important of make D．importance of making 2.The film made by Walt Disney________all over the world.A．is used to show B．is used to showing C．used to show D．used to be shown 3.I couldn’t believe that such an expensive car was ________ and crashed into another car.A．without controlling B．out of control C．under the control D．out of the control 4.—______?—My computer doesn’t work.A．What should I do B．What’s wrong C．What’s the matter D．both B and C 5.Grace bought a lot of new clothes and ______ all her money.A．run out B．run out of C．ran of D．ran out of6.Jane likes the dress but it’s a little expensive, so she can’t make a ________ about it.A．decision B．reply C．discussion D．plan7.—What’s the matter?—My friend hurt her ________. She can hardly walk.A．hand B．neck C．knee D．throat8.—Was Mike in Beijing during this summer?—No, he wasn’t. I thought he was in Shanghai, but _______my surprise, he wasn’t there either.A．in B．for C．at D．to9.Eatingjunk food makes herheavy.A．too much; too much B．much too; too much C．too much; much too D．much too; much too 10.— Are you _______?—Yes, I have a sore throat.A．free B．sick C．healthy D．busy11.—I have a toothache.—_______. Why don’t you see a dentist?A．I think so B．That’s too bad C．I guess you’re right D．That’s a good idea 12.—Bob will take part in the singing competition tomorrow.—He is good at singing. I expect him ________.A．won B．to win C．win D．winning13.The song I Believe I Can Fly tells us that believing in_____ is very important.A．themselves B．itself C．ourselves D．yourselves14.The book ________BetweenaRockandaHardPlace is very useful to the mountain climbers.A．calls B．calling C．called D．call15.Emma likes dancing and she keeps on ______ every day.A．dancing B．dances C．dance D．to dance二、完形填空If you have the flu(流感)，it’s very important to stay home from school. Because it is a(n)1 that could make some people ill. We should2 it spreading(蔓延) around. The flu is a fever3 one or more of these: cough, sore throat or headaches. If you have the flu, home is the4 place to stay.If you sta y at home, you won’t make other people ill. And if you have the flu,5 at home is what you need to get better.Take these steps(步骤) if you feel6 :Tell your parents. They will call the7 to talk about whether(是否) you have the flu or some other illness.Stay home from school and other8 places. Also, try not to make other people in your family ill. Do that by washing your hands9 .Get rest, drink more water and you’ll feel better fast. Be sure to tell your parents how you’re feeling10 they can take good care of you.Go back to school only when you’re feeling better.16.A．illness B．happiness C．hope D．way17.A．let B．stop C．keep D．have18.A．for B．on C．about D．with19.A．good B．well C．better D．best20.A．eating B．playing C．studying D．resting21.A．hungry B．angry C．ill D．bored22.A．teacher B．worker C．doctor D．singer23.A．nice B．important C．different D．crowded24.A．hardly B．often C．seldom D．never25.A．so that B．or C．although D．butBDear Dr. Ramsey,I seem to get colds all the time. I wonder if(是否) there is1 I can do to stop getting them. What should I do if I have a cold?ShirleyDear Shirley,Most people get colds by touching things that another person with a cold once touched. You can2 catch a cold by shaking hands .3 if someone you know has a cold, you should try not to use the same cups, dishes or telephone.Many doctors 4 that vitamin C can help stop colds. They5 people to take some vitamin C when they start to get cold symptoms(症状). You can also have a try. But if it doesn’t work, you should go to the6 .To fight a cold, the body7 healthy food. If you have a cold, you should eat well, but not eat too much. And you should drink lots of water. Also be sure to get enough8 and stay warm. When you get a cold, having a good rest is important and9 .W hen you have a cold, you should also try to protect(保护) other people. Cover your mouth and nose10 a tissue(纸巾) when you cough. Wash all the things that you touch with very hot water before anyone else uses them.Dr. Ramsey26.A．something B．anything C．nothing D．everything27.A．never B．only C．already D．even28.A．So B．Or C．But D．Until29.A．mind B．forget C．believe D．refuse30.A．promise B．advise C．wait D．send31.A．hospital B．museum C．cinema D．restaurant32.A．shows B．gives C．needs D．loses33.A．sleep B．money C．experience D．practice34.A．special B．expensive C．funny D．useful35.A．over B．with C．for D．of三、阅读理解AMike is a factory worker. He is often very tired after a day’s work. His wife, Jenny, has no job, so she stays at home to cook the meals. Every day he can have his dinner when he gets home from his factory.One day, Mike came home very late because he was very busy in the factory. He was very hungry when he got home.He was not happy when he found his dinner was not ready. He was very angry with his wife. He shouted at her, “I’m going out to eat in a restaurant.” “Wait for five minutes,” said his wife. “Why? Do you think that dinner will be ready in five minutes?” asked Mike.“Of course not,” she answered. “But I can be ready to go with you in five minutes.”36.Mike works in________.A．a factory B．an office C．a school D．a hospital37.Jenny stays at home because ________.A．she likes cooking B．she loves her husband very muchC．she doesn’t have a job D．she doesn’t want to work38.One day, Mike came home very late because________.A．he wanted to have dinner in a restaurant B．he had a lot of work to doC．he was angry with his wife D．his wife didn’t cook dinner39.Mike was________when he found his dinner was not ready.A．happy B．glad C．hungry D．not happy40.Which sentence is correct?A．Jenny could have dinner ready in five minutes.B．Jenny wanted to go to the restaurant with her husband.C．Jenny didn’t like the dinner at home.D．Jenny didn’t love her husband.BHello, everyone. I’m Nancy. Some of my class mates said that they were busy going to school and doing their homework after school, and they even couldn’t play on weekends. They felt very tired and some of them even got sick (生病的). I am busy, too. But I still have time to relax and exercise. Do you know why? Making a plan helps me a lot. Every Sunday, I make plans for the next week. Now take my “Monday Plan” for example.I think everyone can enjoy his free time if he has a good plan. But remember: once you make aplan, you must follow it. If t here’s still something you can’t understand (理解), write to me. I’ll be very happy to help you. My email address is Matthew9805@hotmail. com.41.The writer’s classmates got sick because___________.A．the weather was cold B．they did too much houseworkC．they wanted to follow their plans D．they were busy with their studies42.How long does it take the writer to do his homework on Monday?A．Twenty minutes. B．An hour. C．Half an hour. D．An hour and a half.43.The writer has dinner __________ on Monday.A．At 5:30 p. m. B．At 6:00 p. m. C．At 6:30 p. m. D．At 7:00 p. m. 44.The writer__________ after exercising on Monday.A．watches TV B．goes to bed C．takes a shower D．does the dishes45.The writer writes this story because she wants to___________.A．make us do some exercise after school B．ask us to stop studying on weekends C．advise us to make a good plan and then follow it D．tell us to work hard at schoolCLast Friday, I agreed to meet some friends at 6:00 p. m. in a coffee shop. The weather was sunny, so I decided to walk there. I arrived ten minutes early. I ordered a cup of coffee and sat watching people. There were some boys playing football on the street, and a small boy was running after the ball as it rolled (滚) across the road.Suddenly (突然), there came a car. It was going very fast. When the driver saw the boy in his way, he braked (刹车) hard. But it was too late... The small boy was lying on the street without moving. To everyone’s surprise, the car didn’t stop. It drove away quickly.People ran to the boy. There was a cut on the boy’s head and he lost a lot of blood. The coffee shop owner (主人) telephoned the police. Soon an ambulance (救护车) arrived and took the boy to the hospital.At 6:30 p. m., the police arrived and started questioning people. About half an hour later, they asked me to go to the police station because I saw everything. I gave them all the information I knew because I really wanted them to catch the driver. I didn’t leave the police station until 8:00 p. m. After that I went home because I didn’t feel like talking to anyone.The next day, the boy’s parents called me to say thanks. They also told me their boy was fine and the driver was in the police station now.46.Where was the writer at 5:50 p. m. last Friday?A．At home. B．On the street. C．In a coffee shop. D．In the police station.47.Who called the police?A．The writer. B．The boy’s friends.C．The boy’s parents.D．The coffee shop owner.48.The writer left the police station at ________ p. m.A．6:30 B．7:00 C．7:30 D．8:0049.Which is the right order of the following events?①The writer ordered a cup of coffee. ②There was a cut on the boy’s head.③A car came very fast. ④The writer got a call from the boy’s parents.⑤The writer went back home.A．①②⑤③④B．①③②⑤④C．③②①⑤④D．③①②④⑤50.How might the writer feel at the end of the story?A．Happy. B．Tired. C．Worried. D．Popular.四、任务型阅读AParents, doctors and teachers want to know how to help children keep healthy. Here are five rules to keep healthy.Eat different foodIf you eat different food, you can get the nutrients(营养) your body needs. You have to eat two kinds of fruits and three kinds of vegetables a day.Drink water oftenWhen you’re really thirsty, water is the No. 1 choice. How much do kids need? If you are older than 12 years old, drink 3 cups a day.Listen to your bodyWhen you’re eating, notice how your body feels. Sometimes, people eat too much because they don’t notice when they need to stop eating. Eating too much can make you feel uncomfortable.Limit(限制) screen timeWhat’s screen time? It’s the time you spend watching TV or using the computer. Try to spend at most two hours a day on the screen.Be active(积极的)What activities do you like best? Find ways to be active every day. You can write down lots of things to do, and then you can do them when your parents say it’s time to stop watching TV or playing computer games!BDo you often have a cold, headache or sore back? If your answer is “Yes”, your health is a problem. Healthy food is good for our health. Tofu is a kind of healthy food. It is also a traditional Chinese food. We often eat it in China. Now, many people in other countries think tofu is good for health, too. They also like eating it.Milk is another kind of healthy food. You should drink one or two glasses of milk every day. Vegetables are important, too. You should eat lots of them. There are vitamin（维生素）A, B, C, D, E and other vitamins in them.Of course, it’s important to eat a balanced diet. You need some pork, chicken or beef every day. But you shouldn’t eat much of them.据此回答以下5题。
山西省2018-2019学年第二学期八年级阶段四质量评估试题·英语(牛津版)·答案
一、情景反应（每小题1分，共5分）1~5ACCBA二、对话理解（每小题1分，共5分）6~10CABCB三、语篇理解（每小题1分，共5分）11~15CAACB四、听力填空（每小题1分，共5分）16.thirty/3017.ancient18.lie19.Secondly20.tours五、单项选择（每小题1分，共10分）21~25CACBB26~30ACCAB六、补全对话（每小题1分，共5分）31~35DABFE七、完形填空（每小题1分，共10分）36~40BAACC%%%%%%41~45ABBAA八、阅读理解（每小题2分，共50分）（A）46~50ECDBA（B）51~55BAABC（C）56~60CAFBD（D）61.agreement62.different%%%63.cartoons64.means65.无忧无虑（注：以上各题如与答案不一致，但与原文意思相符，且使用正确，可酌情给分。
）（E）66.但是世界上许多人没有那么幸运。
67.acute hunger68.Wars,climate change and natural disasters.（答不全者，酌情扣分）69.To show that China has taken action to meet the UN’s goal of getting rid ofhunger./...70.Never wasting food;call on people to take actions to solve the problems thatcause so many people to go hungry.（开放性试题。
只要言之有理、表达正确即可得分。
）（注：只要所给答案符合要求，且表述无误，即可得满分；如果所给答案符合要求，但表述有误，以5小题为单位，单词拼写错误累计4处扣1分，语法错误累计2处扣1分；第70小题言之有理且表述无误，即可得分；如所给答案不符合要求，不可得分。
山西省2018-2019学年第二学期八年级阶段四质量评估试题·数学(人教版)·答案
证明：连接 OB，OC，
∵ 点 O 是正方形 ABCD 的两条对角线的交点，
∴OB=OC，∠OBM=∠OCN=45°. !!!!!! 4 分
∵∠BOF+∠MOB =∠BOF+∠NOC=90°，
∴∠MOB=∠NOC. !!!!!!!!!!!! 5 分
在△BOM 和△CON 中，
△△∠OBM=∠OCN，
（2）由（1）得，点 C 的坐标为（－2，7），
令 x=0，则 y=3.
∴ 直线 AB 与 y 轴的交点 D 的坐标为（0，3）. 姨姨姨姨姨姨姨姨姨姨姨姨姨姨 5 分
∴S△OCD=
1 2
×3×2＝3.
姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨 6 分
18． 解：由题意可知，AB=36 步，AD=50 步，CD=10 步，且 AB⊥BC.
姨k+b=1，
把 A（1，1），B（3，－3）代入，得
姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨 1 分
3k+b=-3.
姨k=-2，
解得
姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨 2 分
b=3.
∴ 直线 AB 的解析式为 y=－2x+3. 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨 3 分
把 C（－2，m）代入 y=－2x+3 中，得 m=7. 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨 4 分
由勾股定理，得 BC=姨AC2-AB2 =姨602-362 =48. 姨姨姨姨姨姨姨姨姨姨姨姨 3 分
设如果此鹿不向北转，而继续向西跑，猎人需要追 x 步才能追上此鹿. 姨姨姨姨 4 分
根据题意，列方程，得
x-36 x
=
48 50
山西省2018-2019学年第二学期八年级阶段二质量评估·数学(人教版)答案
一、选择题（每小题3分，共30分）题号12345678910选项ABDCABCDBD二、填空题（每小题3分，共15分）11.x ≤１３12．２５姨13．3414．4515．2三、解答题（本大题共8小题，共75分）16.解：（1）原式=６３姨－６－２３姨－4３姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨4分=－６姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.5分（2）原式=６＋９－（７－４３姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨）8分=６＋９－７＋４３姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨9分=８＋４３姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨．10分17．解：当x =５姨＋１时，原式=（５姨＋１）２－５×（５姨＋１）－１=６＋２５姨－５５姨－５－姨姨姨姨姨姨姨姨姨姨姨姨姨１4分=－３５姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.6分18．证明：∵AB ⊥AC ，点E 是BC 的中点，∴AE =BE =EC 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.3分∵AD ∥EC ，AD =EC ．∴四边形ADCE 是平行四边形姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.6分又∵AE =EC ，∴平行四边形ADCE 是菱形姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.8分19．解：（1）四边形ECDB 是矩形姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.2分（2）设OA =OB =x 尺.∵EC =BD =5，AC =1，∴EA =EC －AC =5－1=4姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.3分在Rt △OEB 中，OE =x －4，OB =x ，EB =10，根据勾股定理，得x 2=（x －4）2+102姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.5分整理，得8x =116.解得x =14.5姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨．7分答：秋千绳索OA 的长度为14.5尺姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.8分20．解：（1）∵∠ACB =90°，∠A =60°，∴∠ABC =30°姨姨姨姨姨姨姨姨姨姨姨姨姨.1分∵AB =16，∴AC =12×16=8姨姨姨姨姨姨姨姨姨姨姨姨姨.2分∴BC =AB 2-AC 2姨-162-82姨=8３姨（cm ）姨.3分（2）如图，过点B 作BG ⊥CF 于点G ，∴∠CGB =90°.∵AB ∥CF ，∴∠BCG =∠ABC =30°姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.4分∴BG =12BC=4３姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.5分∴CG =BC 2-BG 2姨=（83姨）2-（43姨）2姨=12姨姨姨姨姨姨姨姨姨姨姨姨姨.6分∵∠D =45°，∠EFD =90°，∴∠DEF =∠D =45°姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.7分又∵∠CGB =90°.∴∠DEF =∠EBG =45°.∴EG =BG =4３姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.8分∴CE =CG －EG =12-4３姨（cm ）姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.9分21．证明：如图，过点E 作EM ⊥AB 于点M ，EN ⊥BC 于点N ．∵四边形ABCD 是正方形，∴∠ABE =∠CBE 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.1分∵EM ⊥AB ，EN ⊥BC ，∴EM =EN 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.2分∵∠EMB =∠ENB =∠ABC =90°，∴四边形BNEM 是矩形姨姨姨姨姨姨姨姨姨姨姨姨姨，3分∴∠MEN =∠AEF =90°姨姨姨姨姨姨姨姨姨姨姨姨姨姨.4分∴∠AEM +∠MEF =∠FEN +∠MEF.∴∠AEM =∠FEN 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.5分在△EMA 和△ENF 中，∠AEM=∠FEN ，EM=EN ，∠AME=∠FNE =90°⊥⊥⊥⊥⊥⊥⊥⊥⊥⊥⊥，∴△EMA ≌△ENF 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.6分∴EA =EF 姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨.7分∵四边形AEFG 是矩形，∴四边形AEFG 是正方形姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨．8分八年级数学答案（人教版）第２页（共4页）八年级数学答案（人教版）第１页（共４页）数学（人教版）参考答案和评分标准山西省2018-2019学年第二学期八年级阶段二质量评估试题22．解：（1）在△ABC 中，∠ACB =90°，AB =5cm ，BC =4cm ，∴由勾股定理，得AC =52-42姨=3!!!!!!!!!!!!!!!!!!.2分如图1，连接AP ，当PA =PB 时，PA =PB =AC +CB －t =3+4－t =7－t !!.3分在Rt △ACP 中，AC 2+PC 2=PA 2.即32+（t-3）2=（7-t ）2!!!!!!!!!!!!.4分解得t =318!!!!!!!!!!!!!!!!.5分（2）①如图2，当AP =AC =3时，△ACP 为等腰三角形，∴3+4+5－t =3!!!!!!!!!!!!!!!!!!!!!!!!!!!.7分∴t =9!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!；8分②如图3，当点P 在AB 上，CP =AC =3时，过点C 作CD ⊥AB 于点D ，∵12AB ·CD =12AC ·BC .∴5CD =3×4.∴CD =125!!!!!!!!!!!!!!!!.9分在Rt △ACD 中，由勾股定理，得AD =AC 2-CD 2姨-32-125姨姨2姨=95.∴AP =2AD =185，∴3+4+5－t =185.∴t =425!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.11分综上所述，当点P 在AB 上，t 为9秒或425秒时，△ACP 为以AC 为腰的等腰三角形!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!．12分23．解：（1）505!!!!!!!!!!!!!!!!!!!!!!!!!!!02分（2）证明：∵四边形ABCD 是菱形，∴AC ⊥DB !!!!!!!!!!!!!!!!!!!!!!!!!!!!.3分在Rt △AOB 中，由勾股定理，得OA 2+OB 2=AB 2!!!!!!!!!!!!!.4分同理，可得OA 2+OB 2+OC 2+OB 2+OC 2+OD 2+OA 2+OD 2=AB 2+BC 2+CD 2+AD 2.∵四边形ABCD 是菱形，∴AO =OC ，OB =OD !!!!!!!!!!!!!!!!!!!!!!!!!.5分∴4OA 2+4OB 2=AB 2+BC 2+CD 2+AD 2!!!!!!!!!!!!!!!!!!!.6分∵AC 2+BD 2=（OA +OC ）2+（OB +OD ）2=OA 2+OC 2+2OA ·OC +OB 2+OD 2+2OB ·OD =4OA 2+4OB 2.∴AC 2+BD 2=AB 2+BC 2+CD 2+AD 2!!!!!!!!!!!!!!!!!!!!.8分（3）这个结论正确!!!!!!!!!!!!!!!!!!!!!!!!!.9分理由如下：如图，过点A 作AE ⊥BC 于点E ，过点D 作DF ⊥BC 交BC 延长线于点F .∵四边形ABCD 是平行四边形，∴AD ∥BC ，AB =DC ，AD =BC .∴AE =DF !!!!!!!!!!!!!!!!!!!!!!!!!!!!.10分∴Rt △ABE ≌Rt △DCF .∴BE =CF !!!!!!!!!!!!!!!!!!!!!!!!!!!!.11分根据勾股定理，得AC 2=AE 2+EC 2=AE 2+（BC －BE ）2，BD 2=BF 2+DF 2=（BC +CF ）2+DF 2=（BC +BE ）2+AE 2，∴AC 2+BD 2=AE 2+（BC －BE ）2+（BC +BE ）2+AE 2，=2AE 2+2BC 2+2BE 2.∵AE 2+BE 2=AB 2.∴AC 2+BD 2=2AB 2+2BC 2=AB 2+BC 2+CD 2+AD 2!!!!!!!!!!!!!!.12分（4）答案不唯一，例如：“平行四边形两对角线的平方和等于四条边的平方和”或“平行四边形的四条边的平方和等于两对角线的平方和”!!!!!!!!!!.14分八年级数学答案（人教版）第３页（共４页）八年级数学答案（人教版）第４页（共4页）图1图3图2。
人教新目标版2018-2019学年八年级英语下学期期末教学质量检测试题(含答案)
2018-2019学年第二学期八年级英语教学质量检测第一部分听力（共两节，满分30分）第一节（共5小题，每小题2分，满分10分）听下面5 段对话，每段对话后有一个小题，从题中所给的A、B、C 三个选项中选出最佳选项，并标在试题的相应位置，听完每段对话后，你都有10 秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1.Where are thespeakers?A. In alibrary.B. Inaclassroom.C. In a bookstore.2.What did the man do on theweekend?A.Went to the amusement park.B.Camped in themountains.C.Stayed out with hisfriends.3.What does the man want tosee?A.Lions.B. Elephants.C. Monkeys.4.Why is the mancalling?A. To takea message.B. To go outwith Judy.C. To ask about ajob.5.Why didn’t the boy finish his homework lastnight?A. It wastoomuch.B. He wastoo tired.C. It was toodifficult.第二节（共10 小题，每小题2 分，满分20 分）听下面三段对话或独白后有几个小题，从题中所给的A、B、C 三个选项中选出最佳选项，并标在试卷的相应位置。
听每段对话或独白前，你将有时间阅读各个小题，每小题5 秒钟；听完后，各小题给出5 秒钟的作答时间。
每段对话或独白读两遍。
听下面一段对话，回答第6 至第8 三个小题。
6.What class does the man want tohave?A. Ascience class.B. Achessclass.C. A danceclass.7.How long does each classlast?A.Twohours.B.Threehours.C. Fourhours.8.When will the man have theclass?A.On Mondays.B.OnTuesdays.C. OnSundays.听下面一段对话，回答第9 至第11 三个小题。
山西省2017-2018学年第二学期八年级通用人教版阶段四质量评估试题·英语·听力材料
英语听力材料第一题情景反应本题共5个小题，每小题你将听到一组对话。
请你从每小题所给的A 、B 、C 三幅图片中，选出词出词你词所词听词到词的词信词息词相词相词相词的一项。
读两遍。
1.%W:%What%is%your%favorite%story%book?M:%I%like%Journey to the West best.2.%M:%What%can%you%see%in%the%mountain?W:%Some%bamboos.3.%W:%You%have%been%to%Hangzhou%recently.%How%did%you%get%there?M:%I%took%the%train%with%my%parents.4.%W:%Have%you%been%to%the%Bird ’s%Nest?M:%Never.5.%W:%How%long%has%William%been%in%the%library?M:%For%three%hours.第二题对话理解本题共5个小题，每小题你将听到一组对话和一个问题。
请你从每小题所给的A 、B 、C 三个选项中，选出一个最佳选项。
读两遍。
6.W:My favorite story is The Emperor ’s New Clothes .What about you,Bob?M:I like Little Red Ridding Hood best.Q:What ’s Bob ’s favorite story?7.W:What do you know about the wild elephants?M:They are becoming fewer and fewer.We must try to protect them.Q:What animals are the girl and boy talking about?8.M:Look!There are many thick clouds in the sky.A storm is coming.W:You ’re right.Let ’s go back home at once.Q:Why do they go back home at once?9.W:I called you last night,but no one answered the phone.Were you out?M:Sorry,I was listening to music in the living room all the time.Q:Where was the boy when the girl called him?10.W:Do you want to go to the Palace Museum with me this Sunday?M:No.I ’ve been there for four times.Q:How many times has the boy been to the museum?第三题语篇理解本题你将听到一篇短文。
人教版八年级英语下册Unit 4 综合素质评价试卷 附答案 (7)
人教版八年级英语下册Unit 4 综合素质评价(限时: 120分钟满分: 120分)第一部分听力(共四大题, 满分20分)Ⅰ. 短对话理解(共5小题；每小题1分，满分5分)1. What do the girl's parents allow her to do?A. B. C.2. What's the girl's advice?A. B. C.3. Where are the two speakers?A. At home.B. At school.C. In the classroom.4. Which subject did Leo study last night?A. Chemistry.B. Physics.C. Chinese.5. Who is Miss Wang probably?A. She is Mark's teacher.B. She is Mark's doctor.C. She is Mark's friend.Ⅱ. 长对话理解(共5小题；每小题1分，满分5分)听下面一段对话，回答第6－7题。
6. Why does Jim get up so early every morning?A. Because he wants to take some exercise.B. Because it is very far from his home to his school.C. Because he wants to remember something about his lessons.7. Who cooks breakfast every morning?A. Jim's father.B. Jim's mother.C. Jim's grandmother.听下面一段对话，回答第8－10题。
山西省2018-2019学年第二学期八年级阶段一质量评估试题·英语(牛津版)·试题
笔试部分 （共 100 分）
五、 单项选择（每小题 1 分，共 10 分）
请你从每小题所给的 A、B、C 三个选项中， 选出一个能填入空白处的最佳选项，并在
答题卡上将该项涂黑。
21. Ann never eats _________ breakfast, but she always eats hamburgers at _________
A. reminds
B. organizes
C. suffers
24. Developing a good sleeping habit can help you live a happy and _________ life.
A. famous
B. lonely
C. healthy
25. —I think to be a good teacher is very difficult.
numbers to give up smoking, you should try to give them a 37 . He or she will 38
lots of support and resources. Here are some things you can do 39 you want to help
B. too much; much too
C. much too; too many
八年级英语 （牛津版） 第 3 页 （共 12 页）
29. Our teacher often asks us _________ questions in groups, but Jack always feels like _________ silence. A. to discuss; keeping B. discussing; to keep C. to discuss; to keep
人教版八年级英语下册Unit 4 综合素质评价试卷 附答案 (3)
人教版八年级英语下册Unit 4 综合素质评价限时: 90分钟满分: 120分一、听说应用(本大题共30小题，每小题1分，共30分；A、B、C、D部分为听力理解，E部分为情景对话)A. 听句子(本题共5小题，每小题1分，共5分)( )1. How did the father go to the station?A. B. C.()2. What do the girl's parents allow her to do?A. B. C.( )3. How did Lily feel?A. B. C.( )4. What did Nick lose on the way to school?A. B. C.( )5. What is the weather like now?A. B. C.B. 听对话(本题共10小题，每小题1分，共10分)听第一段对话，回答第6小题。
( )6. What's the matter with Lisa?A. She argued with her mother.B. She was ill.C. She felt tired.听第二段对话，回答第7小题。
()7. What will the girl do first?A. She will go for a picnic.B. She will stay at home.C. She will ask her parents if she can go for a picnic.听第三段对话，回答第8小题。
()8. Why is Bob so busy every day?A. Because his parents want him to be successful so much.B. Because he has too much spare time.C. Because he likes to take part in after-school classes.听第四段对话，回答第9小题。
山西省2018-2019学年第二学期八年级阶段一质量评估试题·英语(人教版)·试题
A. runs for
B. takes after
C. looks after
30. —Frank, is your dream job to be an animal doctor?
—Yes. I want to do ___________ and help animals at the same time.
waiting area（等候区）outside the X鄄ray room.
Once a woman was 40 that she needed immediate surgery （紧急手术）, but her
family were not with her. Bill helped call her family and took them to 41 so they
2. 答题前，考生务必将自己的姓名、准考证号填写在本试卷相应的位置。
3. 答案全部在答题卡上完成，答在本试卷上无效。
4. 考试结束后，将本试卷和答题卡一并交回。
听力部分 （共 20 分）
一、情景反应（每小题 1 分，共 5 分） 本题共 5 个小题，每小题你将听到一组对话。请你从每小题所给的 A、B、C 三幅图片
6. A. Deaf people.
B. Poor kids.
% C. Blind people.
7. A. She’ll go home.
B. She’ll do the cleaning.
C. She’ll see a doctor.
8. A. Once a month.
B. Once a week.
本题你将听到一篇短文。请你根据短文内容和所提出的 5 个问题，从每小题所给的