2019--2020学年年寒假作业单
2024三年级寒假作业清单
2024三年级寒假作业清单
三年级学生的寒假作业清单：
1.语文：
- 阅读几本有趣的书籍，并写读书笔记或读后感。
- 练习汉字书写，每天写一定数量的生字和词语。
- 背诵一些古诗词，增加文化积累。
- 完成一定数量的语文练习题，如病句修改、造句等。
2.数学：
- 做一些口算和笔算练习，提高计算能力。
- 阅读数学故事或做数学游戏，培养数学思维。
- 完成数学练习题，巩固所学知识。
- 观察生活中的数学问题，并尝试解决。
3.英语：
- 观看英语动画片或听英语歌曲，培养英语兴趣。
- 背诵英语单词和简单的对话。
- 阅读简单的英语故事书。
- 可以尝试用英语写日记或描述日常生活。
4.科学：
- 观察并记录自然界中的现象，如天气变化、动植物等。
- 做一些简单的科学实验，如小制作、小探究等。
- 阅读科普书籍，了解一些科学知识。
5.其他：
- 参加体育活动，如跑步、跳绳、打球等。
- 培养兴趣爱好，如绘画、音乐、手工等。
- 帮忙做家务，如打扫卫生、整理房间等。
- 和家人一起度过愉快的时光，如看电影、玩游戏、旅行等。
一年级数学寒假实践作业册页
ＸＸＸ小学QING LONG XIAO XUE一年级数学寒假实践作业2019-2020学年第一学期亲爱的同学们：愉快的寒假到来了，你有什么样的打算呢？生活中处处有数学，处处离不开数学，就让我们度过一个快乐的而又有意义的寒假吧！老师给你提供了几种数学实践作业，开学时把你的作品带回来，不仅要和大家交流分享，而且还要评选出最优秀的作品来！加油啊！实践性作业一:认识人民币:小朋友们，我们平时接触到钱的时候不多，而寒假正好是买年货用钱的机会。
我们可以利用这个机会，积极地和家长一起买年货，买文具等，帮家长算账，锻炼自己做一个“理财小管家”。
要求:1、认识各种面值人民币。
(100元、50元、20元、10元、5元、2元、1元纸币、1元硬币、5角纸币、5角硬币、2角、1角纸币、1角硬币、1分、2分、5分)2、与家长共同设计使用人民币的活动和游戏。
如在家长的陪同下到超市购物、认识价签上的标价是几元几角几分(比如1.25元：是由一个一元、两个一角或一个两角、一个五分组成)、交款(比如:没有一元可以用两个5角或5个两角代替)。
3、你认识了哪些人民币?它们都是什么样的?请你与家长-起说一说、玩一玩。
比如:一张面值100元的人民币能换几张50元的:几张20元的:几张10元的:几张5元的:几张2元的;几张1元纸币的;几枚1元硬币的。
附:实践活动总结:过年你买过什么东西，你能填写下面的表格吗？实践性作业二: 小小设计师活动一：制作钟表一年级我们认识了钟表，发挥想象，运用我们所学的钟表知识，在卡纸上设计并制作精美可爱、富有创意的钟表图案。
再制定一个假期作息表，让我们的假期生活在时间老爷爷的帮助下过得充实、快乐。
如：活动二：图形拼组画认识七巧板里的图形，用七巧板拼组自己喜欢的图案，并把他们画在A4纸上，涂上好看的颜色。
（把你做的最好的一张开学带到学校，展示给大家。
）实践性作业三：亲子阅读阅读，是一个人成长路上最好的伙伴。
数学里也有很多好玩好笑的故事，也有好看的绘本。
2019-2020学年人教版高二英语寒假作业(8)
2019-2020学年人教版高二英语寒假作业（8）一、小题练习1 no modern telecommunications, we would have to wait for weeks to get news from around the world.A.Were thereB.Had there beenC.If there areD.If there have been2、Hardly_____got out of the court_____the reporters raised a lot of questions to him.A.had he; whenB.had he; thanC.he had; whenD.did he; than3、It was too noisy outside. Not until_____at the top of my voice_____his head.A.I shouted; did he turnB.I shouted; had he turnedC.did I shout; did he turnD.had I shouted; he turned4、_____do we go for picnics.A.CertainlyB.SometimesC.SeldomD.Once5、Not until he retired from teaching three years ago ______ having a holiday abroad.A.he had consideredB.had he consideredC.he consideredD.did he consider6、So fast__________he walk that I couldn’t catch up with him.7、Only then__________(do) they realize how much damage had been caused.8、Only when Lily walked into the office __________(do) she realize that she had left the contract at home.9、__________ when we lost what we had did we realize how much we loved it.10、Never before__________she seen anybody who can play tennis as well as Robert.11、Hardly we left the dormitory the next morning when we realized we had left our map in the room.12、Not until I had read the report I understand the true state of affairs.13、He doesn’t like classic music,nor I do.14、Hardly she finished her homework when her mum asked her to play the piano.15、Only then did we realized the importance of English.二、根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
寒假作业清单
寒假作业清单
语文：
阅读经典名著或课外读物，并完成阅读笔记或读后感。
写一篇寒假见闻，描述自己的寒假生活和体会。
数学：
复习上学期所学知识，完成相关练习题和试卷。
针对自己薄弱的知识点进行专项练习和强化复习。
英语：
背诵英语单词、短语或句型，扩充词汇量。
听英语录音或观看英文影视剧，提高听力和口语能力。
科学：
进行一些简单的科学实验或观察，记录实验过程和结果。
阅读科普读物，了解科学知识和科技进展。
社会：
阅读相关社会新闻或历史书籍，了解社会热点和历史事件。
撰写一篇社会观察或历史人物传记，表达自己的观点和感受。
综合：
制定一个寒假学习计划，明确每天的学习目标和安排。
培养一项兴趣爱好，如绘画、音乐、运动等，并记录自己的学习心得和成果。
其他：
参加一些寒假活动或社区服务，拓展自己的视野和社会经验。
保持良好的作息习惯，合理安排学习和休息时间，保持身心健康。
1。
2019-2020学年七年级寒假作业第06天 译林牛津版(word档含答案)
2019-2020学年七年级寒假作业第06天一、单项填空（每小题1分，满分15分）1. —Excuse me, when is the Christmas party of our school?—This year, it’s ______18:00______ Monday evening.A. on； inB. at； onC. at； inD. on； on2. We don’t have ______salt at home. Could you go and get______，please?A. any； someB. some； anyC. some; someD. any； any3. This orange sweater looks very nice. Can I ______?A. try on itB. try them onC. try it onD. try on them4. —I don’t know ______ for the party.—You look so good now. I think the pink T-shirt _____ the grey jeans very well.A. what to wear; matchesB. how to wear it； matchesC. what to wear； matchD. when to go； match5. There ______ some milk and bread on the table. You can have them _____ breakfast.A. is； forB. is；inC. are; forD. are； in6. My dad spends_______ in the Swimming Club. What about your dad?A. an hour a week swimmingB. an hour a week to swimC. a week an hour swimmingD. a week an hour to swim7. I like making pumpkin lanterns. It's really_______ interesting work.A. anB. aC. /D. the8. There are 50 people. Is the room_______ the meeting?A. enough big to haveB. big enough to haveC. big enough havingD. enough big having9. My mom wears a_______ dress to the party.A. red cotton beautifulB. cotton beautiful redC, beautiful cotton red D. beautiful red cotton10. She asks me to make a kite, but I don't know_______ make it.A. how toB. howC. what toD. what11. Simon wears a purple shirt and _______A. a long white trousersB. long white trousersC. a white long trousersD. white long trousers12. He _____ more vegetables to be healthy.A. needs eatB. needs to eatC. need to eatD. need eating13. I often go walking after supper because I think it can help me _____ fit.A. goB. keepC. makeD. need14. My parents are in good health. He _____ playing table tennis every afternoonA. needsB. plansC. would likeD. practices15. Some children have _______ sugar and it is _______ their teeth.A. too much; bad forB. much too; good forC. too many; bad forD. too much; bad to二、完型填空（每小题1分，满分10分）A lot of students have hobbies, like reading, painting, growing vegetables in their gardens, or looking after lovely animals. Some hobbies are relaxing (放松的) and 1 are useful. 2 can help you grow as a person and learn new skills.David Smith is a student. His hobby is 3 . In the middle school, he 4 a book and it came out (出版) in 2003. Many teenagers love his book and he becomes a 5 young writer. David is successful (成功的), but he thinks of writing 6 only one of his many hobbies and interests. “I like playing badminton too,” says David. He isn’t sure if (是否) he is going to write more books 7 .David is very lucky 8 his hobby makes him happy and successful. But he is also _9 in many other things, and he often plays badminton for his school team.It’s something difficult to remember that we shouldn’t 10 all our time on our hobbies. There are many other interesting things to do in life, and we should try to do something new or different.1. A. the other B. another C. others D. other2. A. Friends B. Hobbies C. Books D. Life3. A. reading B. painting C. writing D. fishing4. A. wrote B. writes C. read D. reads5. A. friendly B. excellent C. famous D. useful6. A. as B. with C. for D. to7. A. in the past B. just now C. now D. in the future8. A. so B. because C. but D. or9. A. happy B. excited C. interested D. sad10. A. take B. spend C. pay D. cost三、阅读理解（每小题2.5分，满分20分）ANow more and more people like taking photos of the food before they eat it. Scientists say that makes food taste more delicious. Do you take photos of your food before having a meal? If your answer is“Yes”，now there is a piece of good news for you. The world’S first pay-by-photo restaurant，Soho’s Picture House，opened in Britain in May，2015. People could pay for their meals by uploading photos of their food.If customers send photos of the food to Twitter or Facebook，they needn’t pay for the food. There is also a photo expert in the restaurant. She will help customers take better photos of their food.According to the research，more than half of people always take photos of their meals. The activity is a part of the“Food for life”project(项目)of the restaurant. It aims to(旨在)show realfood and the way people behave(表现)at meal time.1. Scientists say many people take photos of the food before eating it because_______.A. the food looks very niceB. they pay for food in this wayC. it makes food taste betterD. that’s their hobby2. When did Soho’s Picture House open?A. In April，2015.B. In May，2015.C. In April，2016.D. In May，2016.3. The underlined word“uploading”means“_________ ”in Chinese.A. 购买B. 售卖C. 下载D. 上传4. The“Food for Life”project aims to_________.A. help more people take more beautiful photosB. 1et more people eat their foodC. show the way people behave at mealsD. help people know how to eat healthily5. The best title for the passage is“_____________”.A. Good newsB. Food for lifeC. Photos of foodD. Pay by photosBThe day is like any other day in his life. Tom walks past the shop at the street corner. He stops to look at the front row of shoes, and he feels happy to see that pair of shoes he wants very much is still（仍然） there. But he feels sorry for himself. He really wants to have them for his birthday.He sadly walks away and thinks how to tell his mother about it. He knows she will give him anything he likes if she can. He also knows very well that she has little money. He decides（决定）not to go home so quickly, because he looks worried and his mother will see it. So he goes to the park and sits on the grass. Then he sees a boy in a wheel chair. He notices(注意) that the boy moves the wheel chair（轮椅） with his hands. Tom looks at him carefully and is surprised to seethe boy has no feet. He looks at his own feet. "It's much better to be without shoes than without feet," he thinks. He smiles and he is happier.6.The pair of shoes he likes is______.A. too expensiveB. quite cheapC. not thereD. still there7.Tom goes into the park because he ______.A. is thinking how to tell his mother about itB. wants to see the boy in a wheel chair.C. doesn't want to make his mother worriedD. he feels sad because he wants the shoes8.From the story we can know that Tom _____.A. loves his mother very muchB. doesn't want to stay at homeC. doesn't want to go to schoolD. likes new shoes very much四、词汇检测（每小题1分，满分10分）1. He_______ (祝愿) me a happy birthday and gives me a present every year.2. The watermelon juice_______ (品尝) nice. I like it very much.3. He takes his_______ (找头) and goes out of the shop.4, The_______ (整个的) country (国家) celebrates National Day on Oct. 1st in China.5. Few people keep_______ (日记) now because they are busy.6. I'm very interested in_______ (生物) classes, I can learn a lot about plants.7._______ (盐) is very important for our life.8. -My hobby is_______ cards of festivals. I have a lot of cards now. -May I have a look?9. -Hey, David, you are still_______ in bed. It's seven. -Mum, it's Sunday today. I have no lessons.10. -Is Mary your classmate? You often play with her.-No. We are in_______ classes. But we live in the same street.五、动词活用（每小题1分，满分10分）1. Doing morning exercises _____ (be) good for us.2. Each of the boys _____ (carry) a bag of Looks at the moment.3. My mother tells me _____ (not watch) too much TV.4. The Greens _____ (plan) to go on holiday in Hawaii at present.5. The blouse _____ (make) of cotton feels soft.6. I’m hungry. Is there something _____ (eat)?7. —Good morning, Mrs. Wang. I ____ (want) to talk to you now. —OK.8. Look! There is a little boy _____ (lie) under the big tree.9. Can you tell me how _____ (start) the computer?10. The yellow and red T-shirt makes the young man _____ (look) very cool.六、句子翻译（每小题3分，满分15分）1. Jim 每天早晨跟那个穿白衬衫的人打招呼。
寒假作业一览表
寒假作业一览表
寒假作业一览表可以按照不同的科目和任务进行分类，以下是一个示例：科目：语文
1. 阅读经典文学作品，撰写读后感或读书笔记。
2. 学习并背诵古诗文，完成相关练习题。
3. 完成语文练习册和教辅资料上的练习题。
4. 写一篇作文，主题自选。
科目：数学
1. 完成数学练习册和教辅资料上的练习题。
2. 学习并掌握数学基础知识，如代数、几何等。
3. 完成数学挑战题和趣味数学题目。
4. 复习数学知识，为下学期的学习做好准备。
科目：英语
1. 完成英语练习册和教辅资料上的练习题。
2. 学习并掌握英语语法知识，如时态、语态等。
3. 背诵英语单词、短语和句子，增强英语语感。
4. 阅读英文文章，提高阅读能力。
科目：科学
1. 完成科学练习册和教辅资料上的练习题。
2. 学习并掌握科学基础知识，如物理、化学、生物等。
3. 完成科学实验或制作，培养实践能力和观察能力。
4. 阅读科学类书籍或文章，拓宽知识面。
此外，还可以安排一些其他任务，如：
1. 锻炼身体，保持健康的生活方式。
2. 参加社会实践活动或志愿服务，培养社会责任感。
3. 学习一项新技能或特长，如音乐、绘画、舞蹈等。
4. 规划自己的学习和生活，为下学期做好准备。
(17级语文)2019年秋季学期寒假作业安排表(更正)(1)
日期
内容
1月19日
2020模拟信息卷（1）
1月20日
练字：《李兴平纯手工书写作文字帖》P32-P33
1月21日
抄写并翻译《逍遥游》
1月22日
2020模拟信息卷（2）
1月23日
1月24日-26日
1月27日
练字：《李兴平纯手工书写作文字帖》P34-P35
春节三天不作要求
2020模拟信息卷（3）
1月28日
练字：《李兴平纯手工书写作文字帖》P36-P37
1月29日
抄写并翻译《师说》
1月30日
2020模拟信息卷（4）
1月31日
练字：《李兴平纯手工书写作文字帖》P38-P39
2月1日
抄写并翻译《阿房宫赋》
2月2日
2020模拟信息卷（5）
2月3日
练字：《李兴平纯手工书写作文字帖》P40-P41
2月4日
抄写并翻译《赤壁赋》
2月5日
2020模拟信息卷（6）
2月6日
练字：《李兴平纯手工书写作文字帖》P42-P43
2月7日
抄写并翻译《离骚》
日期 2月8日
内容 写2020模拟信息卷（3）后漫画作文一篇
2月9日
语文学科复习备考自主反思（问题清单、问题产生原因、改进措施界》、《白鹿原》、《红高粱》、《三国演义》
2月11日
2月12日
2月13日
2月14日
2月15日
备注：此表电子版与纸质版请于2020年1月13日（星期一）上午11:00以前交教科室。（上交 命名18级物理学科寒假作业）
2019-2020年六年级上册语文寒假作业
2019-2020年六年级上册语文寒假作业亲爱的同学们:虽然假期已经来临了，但是我们不能放松学习，老师为你们精心准备了每日一个半小时（共20天）的作业，希望每一个同学都能够严格要求自己，及时督促自己认真地完成作业，并做好记录中，度过一个充实的假期。
为了统一作业格式，请同学们准备好以下学习用品：1、16开作业本，最好用带横线的，写字的时候贴着横线，把每一行写整齐。
2、田字格本两个，请把它们订在一起，假期不能忘记练字呀。
新课标第一网3、日记本，假期中的点滴也要记录一下。
4、课外书两本，良好的阅读习惯要保持下去。
5、六年级下册的课本，为下学期打好基础吧。
请同学们提前一天看一下第二天的学习任务，请在家长的监督下完成，每天的作业前请写上日期，坚持当天完成。
2015年2月8日你坐在书桌前的时间是_______:________1、请翻开六年级下册课本第一页，读一下第一组的单元导读，了解一下这个单元的主题是什么。
平凡的事情中蕴含着深刻的道理，细微之处见真理。
请认真学习本单元的文章，用心感悟生活。
2、你是自己的小主人，现在就由你来自学第一课吧。
首先，请先读一遍这两则小文言文，并对照课下注释尝试着口头翻译一下，了解了故事的大体梗概之后，请把它们背过《文言文两则》吧。
3、深入理解课文内容，请在作业本上翻译一下这两则文言文吧，请注意文言文写作业的格式是：第一行抄写原文，并在重点字词下划横线；第二行在划横线的重点字词下解释这个词语；第三行翻译整个句子。
请严格按照这个格式进行。
X|k | B| 1 . c|O |m4、你能结合生活实际，说一下这两则故事中所蕴含的道理吗？请在作业本上写一下吧。
今天的任务就是这些，当你完成今天的任务时，时间已是________:________。
今天你用了__________分钟来进行语文学习，你为自己今天的收获打几分？________（满分10分）写完今天的作业后，请你的家长在此处签字：___________________ 2015年2月9日第一天的作业认真完成了吗？当天的作业一定要当天完成，否则会堆积如山，懒惰也与日俱增。
2019-2020学年七年级寒假作业第01天 译林牛津版(word含答案)
2019-2020学年七年级寒假作业第01天一、单项填空1. The twin sisters have different hobbies. One likes playing ____ violin and the other likes playing ____ basketball.A. the; theB. the; aC. a; ／D. the; ／2. ---______woman is Daniel's mother? --- The one in the red coat.A. WhatB. WhichC. WhoD. Where3. --- This T-shirt looks very modern. It's about 800 yuan.--- Sorry, it's too _______.I don't have enough money. Can I see another one?A. expensiveB. cheapC. differentD. beautiful4. --- Tom, when is our parents' meeting?---It begins _______two o'clock _______the afternoon of 9 December.A. in; inB. at; inC. at; onD. in; on5. --- Would you like ______cola? --- No, thanks. I don't need ________ drinks now.A. some; someB. any; someC. any; anyD. some; any6. - Sally, you look beautiful ___________ the silk dress.- Thanks! I buy it for me party ___________ the evening of February 15th.A. in; onB. in; inC. on; onD. on; in7. -_____do you work on the computer every day? - Hard to say! Six hours or more.A. How oftenB. How manyC. How muchD. How long8. Our PE teacher ______________ an orange T-shirt and blue jeans today. He looks younger.A. is putting onB. is wearingC. is havingD. is trying9. - ___ model plane is it on the desk? - Oh, it's ____. He is a member of the science club.A. Whose; JimB. Who's; JimC. Whose; Jim'sD. Who's; Jim's10. John enjoys ___________ funny stories, but he ____________ good at it.A. saying; isn'tB. saying; isC. telling; isn'tD. telling; is11. —Which of the two shirts would you like?—Well, I have no idea（我不知道）. _______ of them look nice.A. AllB. BothC. EachD. Every12. —Miss Gao is very popular with her students.—Yes. Her classes are _______ lively（生动的）and interesting.A. seldomB. neverC. sometimesD. always13. Amy has to _______a big dinner this evening. She looks great in a white blouse.A. wait forB. look forC. be fit forD. go for14. —_______, sir? —I'd like to buy a gift for my friend.A. Can you help meB. What can I do for youC. How are youD. What day is it today15. —You look very cool today, Simon. —_______.A. Really? Thank youB. Oh, I don't think soC. No. I am not cool at allD. Yes.二、完型填空Liz Murray is an American girl. She was born in the 1980s in New York. She had a _l _time as a little girl. When she was three years old, she found that her parents were taking drugs (吸毒). Her family was 2 . Sometimes she had to 3 on the streets with her sister.In 1996, her mother died. She was really sad. She decided to change her life-she went to a high school, 4 she was still homeless. She worked very hard and did well in all subjects. Finally, she finished the four-year high school studies in two years. 5 she finished her high school, she was given a chance to visit Harvard University. She was very 6 when she saw the university. Later, she decided to work hard to go to Harvard University. Then she applied for a scholarship (申请奖学金) and finally made her 7 come true.While she was studying at Harvard University, she gave a lot of public speeches about her own 8 . She wanted to 9 people like her to achieve their dreams. Her story was made into a film and she also 10 a book named Breaking Nights about it.1. A. happy B. relaxing C. fun D. hard2. A. big B. rich C. poor D. busy3. A. study B. live C. work D. play4. A. though B. but C. so D. because5. A. Before B. After C. When D. As6. A. puzzled B. excited C. disappointed D. nervous7. A. plan B. idea C. words D. dream8. A. story B. family C. parents D. jobs9. A. ask B. tell C. make D. encourage10. A. read B. bought C. wrote D. found三、阅读理解AIf you go to a fast food restaurant, you will probably see a lot of children. Today, some children are too fat, and this is because of their bad eating habits(习惯). Most children are fond of food with a lot of fat, oil, salt and sugar. People call this kind of food "junk food".We find many children eat unhealthily. Some don't have breakfast before they go to school. During the day, some don't have proper(正常的) food for lunch. They don't like vegetables, and many of them don't like to eat fruit. They love to eat food with a lot of salt, sugar or fat.Parents today worry about their children's eating habits. Some doctors advise（建议） children to eat healthily.◆ Children shouldn't eat too much junk food.◆ Children should eat some fruit and vegetables every day.◆ Children should drink more milk.◆ Children should eat breakfast every day.1. The underlined (划线的) phrase are fond of in the first paragraph means_______.A. dislikeB. loveC. hateD. hope2. In this passage, doctors advise teenagers to eat more ______ .A. food with little salt and milkB. food with much sugar and fatC. vegetables and fruitD. cola and hamburgers3. What's the best title for this passage?A. Keeping good eating habitsB. Eating unhealthy food is badC. Eating fast food is goodD. Eating healthily worries parentsBDetective（探长） Dino is on holiday. He travels to another city and goes into a hotel. The keeper gives him a one-bed room. All the rooms on his floor are one-bed ones. The keeper says to him, "One room is for one person only. Don't bring anyone else to your room. Your room is on the third floor." Dino takes the room card and goes to the third floor.A young lady lives next door to Dino. When Dino goes by the lady's room, the lady is telephoning the keeper. She says that her wallet in the room is missing (不见). She just comes back from the cinema.In the evening, someone knocks on Dino's door. He opens the door. A young man stands in front of him."Oh! Eh ... Isn't it Room 408?" the young man asks."No, it is Room 308." Dino answers."I'm sorry."Dino closes the door and calls the police. The police come and catch the man in another one-bed room. He is the thief.4. Why does Dino go to another city?A. To catch the thiefB. To meet the keeper.C. To help the young lady.D. To enjoy his holiday.5. What can we learn about the hotel?A. All the rooms in the hotel are one-bed rooms.B. You can't live with others in a one-bed room.C. Only men can get one-bed rooms in the hotel.D. The room next to Dino's is a two-bed room.6. When does the lady find her wallet in the room missing?A. When the police come.B. When the keeper telephones her.C. When Dino goes by her room.D. When she comes back from the cinema.7. The detective does a few things in the hotel. What's the right order（顺序）of them?a. hear a lady making a callb. get the room cardc. call the policed. talk with the keepere. meet a young manA. d-b-a-e-c.B. b-d-a-e-c.C. d-b-e-a-cD. b-d-e-a-c8. What is a "thief" in Chinese?A. 服务员B. 客人C. 小偷D. 店主四、词汇运用(A)根据句意和汉语注释，写出正确的单词。
人教版2019-2020学年九年级化学寒假作业-作业二(II)卷
人教版2019-2020学年九年级化学寒假作业-作业二（II）卷姓名:________ 班级:________ 成绩:________一、单选题1 . 下列关于水的说法正确的是A．我国水资源丰富，人均水量位于世界前列B．天然水经过自来水厂净化后得到的水是纯净物C．生活中常用煮沸的方法降低水的硬度D．水体有一定的自净功能，城市生活污水可直接排放2 . 为了安全，在加油站、纺织厂和矿井内等场地，都要有明显的安全标志。
下列标志与燃烧和爆炸无关的是A．B．C．D．3 . 按照《水污染防治条例》，我省水污染防治把“严格执法、严厉处罚”列为重中之重，实行政府行政首长负责制和水环境损害责任终身追究制，对排污企业按日计罚。
下列关于水的相关说法中正确的是（）A．向硬水中加明矾净水剂后得到纯水B．水中N、 P元素超标是导致水体富营养化的罪魁祸首C．工业废水可以经过先循环使用后净化的方式利用D．渗透膜淡化海水的过程是分子永不停息无规则运动的结果4 . 下列说法中发生化学变化的是A．用乙醇汽油作燃料驱动汽车B．用海水晒盐C．切割大理石作建筑材料D．利用沸点不同将石油进行分馏5 . 水是生命之源，下列关于水的说法错误的是A．水是一种最常见的溶剂B．水污染与人类活动紧密相关C．水分子保持水的化学性质D．水分子由氢分子和氧分子构成6 . 2019年“世界水日”的主题是“不让任何一个人掉队”。
下列做法能够有效解决我国缺水问题并且符合可持续发展原则的是①增加地下水开采量②直接利用工业和生活污水灌溉农田③改变灌溉方式，推广喷、滴灌技术④推广节水器具A．①②B．③④C．②③D．①④7 . 下列有关水的说法正确的是（）A．提高水的利用率可以节约水资源B．地球表面约71%被水覆盖，所以不必节约用水C．明矾可以使硬水转化为软水D．自来水厂净水过程中只发生物理变化8 . 自来水生产中起杀菌消毒作用的是（）A．明矾B．氯气C．活性炭D．氯化铁二、填空题9 . 氢气具有可燃性，燃烧产物是_____，点燃前必须要_____，方法是_____，若声音___________，说明氢气较纯．10 . 化学和我们的日常生活息息相关，化学科学的发展促进了人类社会文明的进步，提高了人们的生活质量，请用化学知识解释下列现象：（1）将30mL酒精和30mL水混合，得到溶液的体积小于60mL。
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正心小学2019-2020第一学年
寒假作业单
安全作业：
1.经常登录安全教育平台，陪孩子一起学习安全教育平台上的安全知识，完成平台上的寒假活动作业。
2.及时关注安全信息，认真完成老师布置的其他安全作业。
语文作业：
1.《寒假作业》
2.写字
三年级上册我会写的字每天写四个，每个写四遍（中字本，写完一个字空一格）
3.阅读
A.预习语文主题学习丛书，每天阅读一篇。
B.课外阅读推荐书目：
必读：《伊索寓言》《中国古代寓言》《克雷洛夫寓言》《拉·封丹寓言》选读：《（再）（三）寄小读者》《狼王转》《森林报》
4.“我的寒假生活”记录
A.手抄报（春节主题，内容为春联5条，春节古诗等，A4纸）
B.作文（主题为我的寒假生活，文字配图片，A4纸打印，过塑）
数学作业：
1.寒假作业
2.口算作业
要求：准备一个新大本，每天20道计算题，分别是：三位数加减三位数5道、三位数（或二位数）乘一位数5道，估算5道，脱式计算5道。
（也可以准备口算题卡，每日一张），至少20次。
3.结合实际生活，认识东、南、西、北、东南、东北、西南、西北，8个方向。
预习三年级下册第一单元《位置与方向》。
4.认识日期，会看日历。
把每日的日期写到口算作业第一行。
5.亲子活动：学会扑克牌的几种玩法。
英音体美作业：
1.英语：完成寒假作业。
2.美术：绘制一副美术作品，主题为《未来的科技生活》。
要求：符合主题“未来的科技生活”，充分体现科学幻想这一宗旨。
(纸张为4开) 3.体育：坚持每天锻炼30分钟。
4.音乐：观看春节联欢晚会或者少儿春晚，模仿表演自己喜欢的一个节目。