假期作业7
高中语文假期精品作业7

2012届高一语文暑假精品练习作业7一、本题共有11小题,每小题3分,共33分。
1.下列加点字注音全都正确的一项是()A.得间(jiàn)塞.(sè)源绯.红(fěi)剽.悍(biāo)B.失其所与(yǔ)逡(qūn)巡炮.(pào)烙监.(jiàn)生C.共.(gòng)其乏困剔.透(tī)憎.(zēnɡ)恨包扎.(zā)D.载.(zài)舟氛.(fēn)围旌.表(jīng) 强劲.(jìng)2.下列句子中没有错别字.....的一项是()A.娴熟流水账售罄真挚B.荒谬扫瞄仪端详创意至上C.延袭发贴子诙谐震耳欲聋D.化妆吓马威攻讦国粹3.下列各句中,加点的成语使用不恰当...的一句是()A.在30年的记者生涯中,他创作了一批优秀的新闻作品,在中国新闻史上留下了浓墨重...彩.的一笔。
B.这位明星曾带给观众很多欢乐,不少粉丝竞相模仿他的表演,但这次他因醉酒驾驶而触犯法律的行为却不足为训....。
C.满耳的蛙声,激昂亢奋地噪闹着,将静夜和旷野喧嚣得如同这季候一般,热情洋溢,生.机勃勃...。
D.丁蕾在写作竞赛中获得第二名,大家都夸她是才女,她却求全责备....,谦虚地说自己的文章还有很多不足之处。
4、下列各句中,没有语病....的一项是()A、全球性的经济危机爆发几年来,重创了全球的股票市场。
虽然各国政府的救市措施不断出现,但全球股票市场基本上处于下跌的状态。
B、中国正在经历一场从“吃饱”向“吃好”、“吃健康”的转变,在这一历史进程中,能否保证公众的食品安全,取决于政府的执政水平,事关百姓的切身利益。
C、近几年来,全球汽油、柴油价格不断上涨,造成工农业生产成本大幅提高,给世界经济复苏蒙上了一层阴影,给老百姓的生产生活带来了很大的压力。
D、这位房产分析师认为,通过政府出面收购房源,可以使市场成交量在短期内得以拉升,给市场以“回暖”的预期,从而刺激房市。
2021年高一下学期英语暑假快乐学习作业(七)含答案

xx.72021年高一下学期英语暑假快乐学习作业(七)含答案开心微博——快乐每一天Such An InterpretationA famous writer who was visiting Japan was invited to give a lecture at a university to a large group of students. As most of them could not understand spoken English, he had to have an interpreter.During his lecture he told an amusing story which went on for rather a long time. At last he stopped to allow the interpreter to translate it into Japanese, and was very surprised when the man did this in a few seconds, after which all the students laughed loudly. After the lecture, the writer thanked the interpreter for his good work and then said to him, “Now please tell me how you translated that long story of mine into such a short Japanese one.”“ I didn’t tell the story the at all,” the interpreter answered with a smile. “I just said,‘The honorable lecturer has just told a funny story. You will all laugh, please.’”多思善想创新每一天Ⅰ.单词拼写1、These books b_____ to Sarah. I must give them back to her.2、When the boiler e_____, many people were injured.3、At present, we have no e_______of life on others plants.4、He has been working hard these days. There'no d_____that he get goodmarks in the exam.5、Only in this way can they find better jobs after _________(毕业)。
四年级国庆假期语文作业7

四上语文练习
一、先补充词语,再按要求填空。
晶()剔透虎啸狮()清清()()
银花()开天下()名清澈见()
1.画“”的词语含有两个动物名,照样子再写三个这样的词语:。
2.画“”的词语意思是,与这个意思相同的或相近的词语还有。
二、选词填空。
1.持续继续陆续
下课了,同学们()走出教室。
他休息了片刻,又()思考起来。
我军()奋战了三天三夜,终于取得了胜利。
2.神奇好奇惊奇
我怀着(),迫不及待地叫妈妈打开了电脑。
网络世界真是()极了!
他的进步实在太大了,所有的人都感到非常()。
三、按要求写句子。
1.泉水一串串从地下往上涌。
(改成比喻句)。
2.池里的水很清,游鱼水藻都可以看得清清楚楚。
(照样子仿写句子)
天空一片碧蓝,。
3.虎门销烟这一伟大壮举,向全世界表明,中国人民是不可欺侮的。
(改成反问句)
4.()林则徐虎门销烟有功,()受到后人的传颂和敬仰。
(填写合适的关联词)
四、课文链接。
说到济南,自然会想到济南的七十二泉。
这些泉有的白浪翻滚,好像;有的晶莹剔透,好像;有的,听起来如虎啸狮吼;有的,听起来如秋雨潇潇。
其中最著名的要数珍珠泉、、和了。
1.将课文内容补充完整。
2.这一段话采用了和的修辞手法,从和两个方面描写了济南的泉水。
3.济南的四大名泉在泉水流动上各有特色,请回忆课文内容连线。
珍珠泉五龙潭黑虎泉趵突泉
冒喷吐涌汇注。
寒假作业(7)

寒假作业(7)一、单项选择题1. -What a beautiful baby? How was he when he was born?-4 kilograms.A. heavyB. heavilyC. weightD. weigh2. -What are you busy ?-I’m busy the plan for the sports meeting.A. in, to makeB. with, to makeC. with, makingD. in, making3. -Do you often hear her in the next room?-Yes, I heard her a moment ago.A. sing, singB. singing, singingC. to sing, to singD. sing, singing4. -What are books used for?-They can us with knowledge.A. giveB. takeC. carryD. provide5. -Maria looks much healthier than she five years ago.A. didB. doesC. wasD. is6. -We walked the bridge and soon come to a hut.A. acrossB. throughC. onD. over7. -Sh e can‟t walk but she doesn‟t ha ve a wheelchair .A. sitB. sit inC. to sitD. to sit in8. -The experts think that India‟s population may be than China‟s 2020.A. much, byB. more, inC. larger, byD. larger, on9. -I’ve forgotten to bring my bread.-Never mind, you can have .A. some of usB. us someC. some of oursD. some of yours10. -We’ll have holiday next month.-Will you visit your uncle in Changsha?A. five-daysB. five days’C. five-dayD. a five-days二、阅读理解Pennsylvania-When Connie Beck and her husband woke up and heard strange noises last weekend, they thought high winds were rattling (发出格格的响声) their home.What they found was even more unexpected: A deer was taking a bubble (泡沫) bath in their bathtub.“I wasn‟t exactly dressed for company,” Mrs. Beck said, “We were just waking up.”The deer burst through the front door early Saturday, ran past the c ouple‟s bedroom and into the bathroom.Somehow he managed to turn on the water in the bathtub and knock over a bottle of bubble bath into the bathtub.He then got himself into the bubble water.“You could hear the water running over the kicking,” Beck said. The Becks called State Game Commission officials, who arrived with tranquilizers(镇定剂)and a lot of laughter.“A guy said, …There‟s nothing wrong… he‟s just in there taking a bubble bath,‟” Mrs. Becksaid.The animal was soon brought under control, removed from the house and released.“He was unharmed except for a little cut above the eye,”said Mrs. Beck, “We were also fortunate. There wasn‟t much damage, except for the front door, some marks on the tub, and a few hoof prints on the floor.”( )1. When did the story take place?A. In the late night of Friday.B. In the midnight of Saturday.C. On the early morning of Saturday.D. On Sunday evening.( )2. When Mrs. Beck said, “I wasn‟t exactly dressed for company,” she .A. was joking about the incidentB. meant she never liked people to visitC. explained she was about to go to workD. wished she could have new clothes( )3. After bursting through the door and entered the bathroom, the animal .A. managed to cover himself with bubblesB. kicked over the tubC. began to swim in the tubD. happened to turn on the bath taps( )4. The underlined word “hoof” most probably refers to .A. the foot of an animalB. the mouth of an animalC. the tail of an animalD. the waste of an animal( )5. Which of the following would be the best title for the text?A. A Dangerous DeerB. An Interesting WeekendC. An Unexpected VisitorD. A Bubble Bath三、阅读填词A girl came into the office, following the manager. She was so pretty that all the workers stopped to look carefully at her. Mr. Ball i 1 the newcomer to his workmates. The girl named Anne asked them to help her. Then she sat down at the desk next to Richard. The young man‟s heart b 2 faster.Richard was a newcomer, too. He learned a lot when he was at college. He was a 3 and the manager liked him very much. He was a young man of few words. So he could say nothing when he stayed with a girl. He wasn‟t married though he was n 4 thirty. His parents were worried about it and they asked their friends to do something helpful for the young man. Of course, the manager purposely (有意地) put Anne‟s desk there.Anne had little experience and often asked for Richard‟s a 5 . The young man, of course, tried his best to help her. And one day he helped the girl s 6 a problem. She asked him to have dinner with her the next evening.Mr. Ball and Richard‟s parents were all glad after they had heard it. His mother told him what he should say to the girl. She made her son learn them by h 7 . And when the dinner was o 8 and Anne was leaving, Richard stood up and stopped her. With a red face, the young man said what his mother told him. To his surprise, the girl r 9 .“I have a boy friend and we‟re going to mar ry this fall,” said Anne, “Don‟t be so sad, my friend. But I s10 enjoy your good insight (眼光)!”1. i2. b3. a4. n5. a6. s7. h8. o9. r 10. s组合训练(7)一、单项选择1. Please tell me how the accident , I‟m still in the dark.A. come byB. came uponC. came toD. came about2. –Did anyone support you at the meeting?–Mike was the only person who my opinion.A. agreedB. caredC. sharedD. accepted3. –It was careless of you to have left your clothes outside all night.–My God!A. So did IB. So I didC. So were youD. So did you4. – Linda, what are you thinking about?–Oh, I‟m considering .A. going abroadB. to go abroadC. going to abroadD. to go to abroad5. – What do you know about Yichang city?–Yichang city is the west of Hubei.A. atB. onC. toD. in6. –How long will you stay in England?–I‟m afraid I‟ll for quite a long time.A. leaveB. be leavingC. be away C. be going7. – Can you come and give us a talk on Tuesday or Friday?– I‟m afraid day is possible.A. bothB. eitherC. neitherD. all8. Can you believe that in a rich country there should be many poor people?A. such, suchB. such, soC. so, soD. so, such9.The suit fitted him well the color was a little brighter.A. expect forB. except thatC. exceptD. besides10. A number of students playing on the playground but I don‟t know what the exactnumber .A. is, isB. are ,areC. is, areD. are, is11. I work in a business almost everyone is waiting for a great chance.A. howB. whichC. whereD. that12. The women‟s football match a draw (平局) yesterday.A. endedB. ended inC. ended onD. ended by13. -That‟s a lo vely dress.-Do you think so? But I don’t the color.A. interest inB. care forC. please withD. fond of14. Each of the two boys wanted to get the toy and fought until one .A. give upB. gave inC. gave backD. gave off15. The doctor advised my mother to live the air is fresher.A. in whereB. in whichC. the place whereD. where二、阅读理解I met him first on a summer morning in 1936. I had rushed into his ugly little shop to 1 the heels (后跟) of my shoes repaired. It wasn‟t much of a 2 , so I waited while he did it. He greeted me with a cheerful smile, “You‟re new in this neighborhood, aren‟t you?”I said I was. I had 3 into a house at he end of the street only a week 4 .“This is a fine 5 ,” he said, “You‟ll be happy here.”I sat there with my shoes off, watching as he 6 ready to do the repairs. Sadly he looked at the leather (皮) covering on the 7 . It was worn out. I grew impatient because I was rushing to meet a friend. “Please hurry,” I 8 .He looked at me over his glasses. “Now, lady, we won‟t be 9 . I want to do a good job,”he was silent a moment, “You see, I have a tradition (传统) to live up to.”A 10 ? In this ugly little shop that was not different from so many others on the side streets of New York?He 11 have felt my surprise, for he smiled as he went on. “Yes, lady, my father and grandfather were 12 in Italy, and they were the best. My father always told me, …Son, do the 13 job on every shoe that comes into the shop, and be 14 of your fine work. Do that always, and you‟ll have 15 happiness and money to live on.‟”( ) 1. A. put B. make C. have D. order( ) 2. A. work B. job C. thing D. matter( ) 3. A. lived B. got C. stayed D. moved( ) 4. A. ago B. before C. since D. early( ) 5. A. neighborhood B. country C. shop D. house( ) 6. A. made B. took C. got D. had( ) 7. A. heel B. shoe C. back D. top( ) 8. A. ordered B. begged C. said D. expected( ) 9. A. late B. over C. long D. done( )10. A. job B. tradition C. moment D. shop( )11. A. couldn‟t B. should C. wouldn‟t D. must( )12. A. businessmen B. shoemakers C. both D. shopkeepers( )13. A. most B. first C. best D. last( )14. A. proud B. kind C. good D. able( )15. A. both B. all C. much D. most。
2022-2023学年上学期小学数学六年级寒假作业 (7) 含解析

小学数学六年级寒假作业学校:__________ 班级:__________ 姓名:__________ 考号:__________1. 太阳的质量是由75%的氢和25%的氦组成的。
如图()能地表示这个信息。
A. B. C. D.2. 五(1)班有40个学生,选一名同学任班长,选举结果如下表,下面()图表示了这一选举结果。
A.①B.②C.③3. 在一个40名学生的班级中选举班长,选举结果是:下面那个圆圈图显示了结果()A. B. C.4. 甲、乙两校男、女生比例如图所示,下列说法正确的是()A.甲校男生比乙校男生少B.甲校女生比乙校女生少C.无法确定5. 小林家上月工资总收入6000元,如果按照如图进行支配,那么教育费用约是()A.3000元B.1500元C.900元D.600元6. 六(2)班有40名学生,选举班长的结果如下表所示。
下面()图表示了这一结果。
A. B. C. D.7. 有一班共40名学生,要投票选举班长。
投票结果如下表,()统计图能够显示这次投票的结果。
A. B. C. D.8. 如图是红星果园各种果树栽种情况统计图,根据图中所提供的信息,下面说法中,错误的是()A.苹果树棵树最多B.梨树棵数最少C.桃树与其它果树棵数同样多D.统计图只能反映各种果树棵数的百分比,不能确定哪种果树棵数的多和少9. 第29届北京奥运会上中国共获得金牌51枚,银牌21枚,铜牌28枚,表示中国获得奖牌情况的是()幅图。
A. B. C. D.10. 王爷爷早晨出去晨练,从家出发步行15分钟来到公园,打了30分钟的太极拳,然后步行10分钟回家,下面()图大概表示王爷爷外出时间和离家距离的变化情况。
A. B. C.11. 下面哪幅统计图能表示希望小学六年级同学喜欢图书的投票结果。
()希望小学六年级同学喜欢图书情况统计表A. B. C. D.12. 某校男生,女生人数表示在图中的扇形区(如图),则男生占全校人数的百分比为()A.98%B.52%C.48%13. 如图是某农场种植三种蔬菜面积的扇形统计图,如果西红柿的种植面积为4.2公顷,黄瓜的种植面积是()公顷。
7 英语假期作业

东苑中学快乐周休七年级英语作业一、单项选择。
1. —How’s the weather there?—________. I can skate on the river.A. It’s warmB. It’s coldC. It’s hotD. It’s cool2. They are ________ a vacation in the mountains.A. inB. onC. atD. of3. My parents asked me ________ computer games.A. not playingB. not to playC. not play D don’t4. You should________a letter ________ him.A. write; toB. write; onC. wrote; toD. wrote; on5. —Hi. How’s it going?—________.A. I don’t like i tB. I will go to schoolC. Not badD. No problem6. —Where is Toronto? —It’s in________.A. JapanB. the U.S.AC. CanadaD. Canadian7. Jack usually takes a walk________the pool after supper.A. atB. inC. byD. over8. —Can I use your phone, John? Mine doesn’t________. —Sure. Here you are.A. useB. keepC. workD. go9. On a ________ morning, she comes back home.A. rainB. rainyC. rainsD. rained10. I will be back________.A. beforeB. soonC. afterD. until二、根据句意及首字母或汉语提示填写单词。
2021年高二暑假作业英语试题7 含答案

M5U2 The environment编写:尹红梅审阅:唐为龙一、语法专区(一) 单项选择1. ________ his learning method, his cousin was sure that he would achievea good mark in the examination .A.Being improved B.Improved C.To be improved D.Having improved2. _________ from his looks, he is a kind man.A. JudgingB. Being judgedC. To judgeD. Judge3. When I got back home, I saw a message pinned to the door _______“Sorry to miss you; I’ll call later.”A. readB. readsC. to readD. reading4. He sent me an e-mail, _______ to get further information.A. hopedB. hopingC. to hopeD. hope5. He was busy writing a story, only ________ once in a while to smokea cigarette.A to stopB stoppingC to have stoppedD having stopped6. It is one of the funniest things ______ on the Internet so far this year.A findingB being foundC to findD found7. The flowers his friend gave him will die unless __________ every day.A wateredB wateringC waterD to water8. ________ in the mountains for a week, the two students were finally saved by the local police.A Having lostB LostC Being lostD Losing9. More and more people are signing up for Yoga classes nowadays,_________ advantages of the health and relaxation benefits.A takingB takenC having takenD having been taken10. Reading is an experience quite different from watching TV; there arepictures _____ in your mind instead of before your eyes.A to formB formC formingD having formed11. ________ the project as planned, we’ll have to work two more hoursa day.A pletingB pleteC pletedD To plete12. We had an anxious couple of weeks ______ for the results of the experiment.A waitB to be waitingC waitedD waiting13. _______ to reach them on the phone, we sent an email instead.A FailB FailedC To failD Having failed14.The meeting _______ next week is sure to be a great success.A. to take placeB. to be taken placeC. to have taken placeD. being taken place15._______ by the rade Lei Feng, we try our best to do good deeds.A. InspiredB. Being inspiredC. To be inspiredD. Inspiring16.It's no good _______ here. Let's go home.A. to waitB. waitedC. waitingD. being waited17.I listened to the wind, ______ that he would not e tonight.A. thinkingB. to thinkC. thoughtD. being thinking18.As a result of my laziness, I failed ________ my work in time.A. and finishedB. to finishC. and finishingD. to finished19.I am sorry ______ written you a letter at the time.A. to have notB. to not haveC. not to haveD. not having20.The article _________ on this subject was written by Mr. Black.A. referringB. referredC. referring toD. referred to21.Living near the sea, ___________________.A. we enjoy healthy air and beautiful sightB. healthy air and beautiful sight is what we enjoyC. it is healthy air and beautiful sight we enjoyD. so we enjoy healthy air and beautiful sight22.__________ since the night before, I felt very hungry.A. Having not eaten anythingB. Not eating anythingC. I hadn't eaten anythingD. Not having eaten anything23.We then listened to the child ________ the article ______ on the blackboard.A. read, writingB. reading, writingC. to read, writtenD. read, written24.________ it with me and I'll see what I can do.A. When leftB. LeavingC. If you leaveD. Leave25._________ such a chance, why don't you have a try?A. To giveB. Having givenC. GivenD. Giving26.We discussed the plan that we would like to see ________ the next week.A. carry onB. carrying outC. carried outD. to carry out27.Five people were reported ________ in the accident.A. to be killedB. to killC. killedD. to have been killed28.____________ , I went to the park with my uncle.A. As holidayB. Being no classesC. Since have no classesD. It being a holiday29. "Do you mind _________?" "Go ahead."A. opening the doorB. your opening the doorC. my opening the doorD. I opening the door30. I have one or two things ____________.A. to lookB. to seeC. to see toD. to look to31._________ is bad for his health.A. Mike smokingB. Mike's smokingC. Mike's being smokingD. Mike smokes32.I came into the classroom, ______ my seat and sat down to read.A. findingB. to findC. foundD. founded33.I am tired and I don't feel like _____ any further.A. to walkB. to be walkingC. walkingD. walk34.She did nothing but ________walk in the street.A. takingB. takeC. to takeD. took35.It is a problem that doesn't need ________ right now.A. to solveB. solvingC. being solvedD. to be solving36.I ________ my handbag stolen last week.A. hadB. letC. lostD. left37.________ by a crowd of people, I felt nervous, ______ what to say.A. Watching, didn't knowB. Having watched, and not knewC. Having been watch, not knownD. Being watched, not knowing (二)对比练习1. ________many times , but he still couldn't understand it .2. ________many times , he still couldn't understand it .A. Having been told .B. ToldC. He was toldD. Though he had been told3. ________to the left , you'll find the post office .4. If you ________to the left , you'll find the post office .5. ________to the left , and you'll find the post office .A. TurningB. To turnC. TurnD. Turned6. ______from space , the earth looks blue .7.______from space , we can see the earth is blue .A. SeenB. SeeingC. To seeD. See8. The dirty clothes ______ , the girl hung them up outside .9. ______ the dirty clothes ,the girl hung them up outside .A. was washedB. washedC. were washedD. having washed10 The building ______now will be a restaurant .11. The building ______next year will be a restaurant .12. The building ______last year is a restaurant.A. having been builtB. to be builtC. being builtD. built13. He stood there ______for his mother .14. ______for two hours , he went away .A. waitingB. to waitC. waitedD. Having waited二知识点回顾1. ---“Would you like to go with us for a picnic tomorrow?”---“Yes, __________.”A. I would likeB. I’d like to goC. I’d loveD.I’d like to2. If you pare food costs today ______ of a year ago, you will find thedifference.A. to thatB. to themC. with thatD.with those3. The grass has grown so tall that it needs _________.A. to cutB. to be cut itC. cuttingD. being cut4. Jerry is such a person that he can’t _______ being laughed at by others,especially by his classmates.A. hesitateB. sufferC. standD. admit5. ---“What’s made you so upset?”--- “_________ three tickets to the pop music concert.”A. LostB. LosingC. Because of losingD. Since I lost6. He advised that I ____to hospital for a medical exam, so I consider____tosee a doctor.A. should go; to goB. go; goingC. went; goingD.to go; go7.---Have you seen the headmaster today?---No, he is said _____ Yuhan on business.A. to goB. to have gone toC. to have been toD. to hasgone to8.It is required that the students _______ mobile phones in their school, so seldom ______ them using one.A.shouldn’t use; you will see B. not use; will you seeC.don’t use; will you see D.shan’t use; you will see9.The Tower of London is _______ the Church tower.A.twice high than B.two times high asC.twice higher as D.three times the height of10. —Is this stick long enough?—No, I need one _____.A. twice so longB. so long twiceC. twice as longD.as long twice11. He stood for a moment with one of his hands still ______.A. risenB. raisingC. raisedD. having raised12. Please keep on trying. I’m sure the efforts you are _______ will pay off.A. doingB. givingC. makingD. sparing13. The bus rolled into the valley, _______ ten deaths and more wounded.A. to causeB. causingC. causedD. having caused14. The discovery of new evidence resulted in _____.A. the thief having caughtB. catch the thiefC. the thief being caughtD. the thief to be caught15. The project ,______by the end of xx, will expand the city’s telephonenetwork to cover 1,000,000 users.A. acplishedB. being acplishedC. to be acplishedD. having been acplished答案:(作业7)一 DADBB DABAC DDDAA CABCDADDDC CDDCC BCCBB ADCA(D) ACC AB BD CBD AD二 DDCCB BBBDC CCBCC22419 5793 垓k25098 620A 戊\29840 7490 璐f25375 631F 挟d21972 55D4 嗔t37431 9237 鈷40556 9E6C 鹬。
我的假期作业作文(7篇)

我的假期作业作文(7篇)寒假期间,我在一个美丽的地方呆了两个月,那是一个远离城市的安静小镇,风景宜人,山川秀美。
人很简单。
秋收之后,他们已经开始准备过年了。
农村比城市更注重春节的礼仪,因为这是祖先留下的传统,也是要收拾家里买新衣服犒劳辛苦一年的自己。
也有辛苦长途跋涉的孩子,让他们温暖地回家过年。
一年没见父母的孩子此时更幸福。
孩子们喜欢和我一起玩,争先恐后地告诉我爸爸妈妈什么时候回家,还有他们会带回来什么好看的新衣服,新奇的玩具,好吃的糖果。
全家都在为学生、孩子、家长的回归做准备。
他们心中怀着思念、幸福和期待,在为新的一年做准备。
快过年了,我们要挨家挨户杀猪。
大家都会来帮忙的。
男人抓猪杀猪,女人烧水做饭,孩子围着院子跑,等着吃饭。
过年只能杀猪。
年三十,远道归来的人回到家,一家人坐在热炕上,热闹地吃年夜饭。
有人哭说生活不易,有人欢喜社会发展。
孩子们如愿以偿地得到了他们想要的新衣服、玩具和糖果,老人见到了他们分开一年的孩子。
全家人坐在一起看春晚,看除夕,12点放烟花过年。
春节期间,人们会带着礼物来拜访亲戚,谈论他们的日常生活,让见过世面的旅行者谈论他们看到和知道的世界。
孩子很开心,大人有压岁钱,但是大部分孩子会被父母以临时抚养权的名义扣掉,哈哈!若干年后,回归的人又会离开。
有的人会选择留下,有的人会跟随发育良好的人重新踏上征程,又要一年又一年& hellip& hellip七点半,我们上了车,开车去苍山。
我睡意朦胧地打了个哈欠。
窗外茂密的树木赏心悦目,鸟儿在枝头啼叫,只有清晨才有的新鲜空气透过窗户,让人精神焕发。
新的一天开始了!来到苍山脚下,我们抬头看苍山。
它高耸入云,姿态挺拔。
一开始,我是慢慢向前走的。
过了一会儿,我有点不耐烦了。
我挽起袖子,弯下腰,积蓄力量,向前冲去。
我看见前面有一块大石头。
我踩在上面,微微弯腰,向上推,张开双臂看着我& ldquo大鹏展翅。
落地后,我继续狂奔。
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2月7日 假期作业7可能用到的相对原子质量:H 1 C 12 N 14 O 16 Na 23 Si 28 S 326.下列说法不.正确..的是 A .可用中和法处理酸性或碱性工业废水 B .垃圾填埋正成为垃圾处理的发展方向C .使用纤维素和淀粉为原料制成的微生物降解塑料,可治理“白色污染”D .向煤中加入适量石灰石,可减少其燃烧产物中的SO 2,降低对大气的污染7.下列说法正确的是A .用氨水洗涤附着银镜的试管B .用CCl 4作萃取剂直接从海带中提取I 2C .用向下排空气法收集NH 3,并用湿润的蓝色石蕊试纸验满D .制乙炔时滴加饱和食盐水是为了减缓电石与水的反应速率8.下列离子方程式书写不.正确..的是 A .Cl 2通入FeCl 2溶液中:Cl 2+Fe 2+=Fe 3++2Cl - B .Na 2CO 3溶液显碱性:CO 32-+ H 2OHCO 3-+ OH - C .Al 和NaOH 溶液反应:2Al+2OH -+2H 2O =2AlO 2-+3H 2↑ D .少量SO 2通入氨水中:SO 2+2NH 3•H 2O =2NH 4++SO 32-+H 2O9.X 和Y 元素的原子在化学反应中都容易失去电子,形成与Ne 原子具有相同电子层结构的离子,且X 的原子序数大于Y 的原子序数。
下列说法正确的是A .X 的金属性比Y 的强B .X 的最高正化合价比Y 的高C .常温下,X 和Y 的单质一定不与水反应D .Y 的最高价氧化物对应水化物的碱性比X 的弱10.Li-SO 2电池具有输出功率高和低温性能好等特点。
其电解质是LiBr ,溶剂是碳酸丙烯酯和乙腈,电池反应为2Li + 2SO 2 Li 2S 2O 4。
下列说法正确的是 A .该电池反应为可逆反应 B .放电时,Li +向负极移动C .充电时,阴极反应式为Li + + e -=LiD .该电池的电解质溶液可以换成LiBr 的水溶液 11.25℃时,下列关于分别由等体积0.1 mol/L 的2种溶液混合而成的溶液的说法中,不正..确.的是 A .Ba(OH)2溶液与 Na 2SO 4溶液:pH =13B .醋酸与CH 3COONa 溶液:c (Na +)+c (H +)=c (CH 3COO -)+c (OH -)C .Na 2CO 3溶液与 NaOH 溶液:c (Na +)>c (CO 32-)>c (OH -)>c (H +)D .Na 2CO 3溶液与 NaHCO 3溶液:2c (Na +)=3c (CO 32-) + 3c (HCO 3-) + 3c (H 2CO 3)12.火法炼铜可以从黄铜矿(CuFeS 2)或辉铜矿(Cu 2S )中提取铜,发生如下反应:① 2CuFeS 2+4O 2 Cu 2S +3SO 2+2FeO ② 2Cu 2S+3O 2 2Cu 2O+2SO 2 ③ 2Cu 2O+Cu 2S 6Cu+SO 2↑下列说法正确的是A .反应②、③中,Cu 2S 都只做还原剂B .1 mol CuFeS 2生成1 mol Cu ,理论上消耗2.5 mol O 2C .1 mol Cu 2S 和O 2反应生成2 mol Cu 转移的电子数为4 molD .反应①中,共转移的电子数为16 mol ,CuFeS 2中铜元素的化合价为+2800℃ 1200℃1200℃ 放电充电25.(16分)香兰素存在于香草豆等植物中,是有机合成的重要原料。
(1)香兰素含有C 、H 、O 3种元素,相对分子质量为152,氧元素的质量分数为31.6 %,碳、氢元素质量比为12︰1。
香兰素易溶于乙醇,熔点为81℃~ 83℃,沸点为284℃。
① 从香草豆等植物中可以提取香兰素,部分流程如下图所示。
操作1的名称是 。
② 香兰素的分子式是 。
(2)以香兰素为原料,经过一系列转化,可以得到药物利喘贝( )。
① G →利喘贝 。
E →F 。
② D 分子内含有碳碳双键,C →D 的反应类型为 。
③ B 的结构简式是 。
④ 下列说法正确的是(填选项序号) 。
a .A 分子中含有羟基和醛基 b .有机物C 存在顺式和反式结构c .有机物F 生成G 时,可以用KMnO 4酸性溶液代替新制Cu(OH)2悬浊液d . 既能与盐酸又能与NaOH 溶液反应⑤ 香兰素能发生银镜反应,其分子中苯环上取代基的数目和位置均与A 相同。
1 mol 香兰素与饱和溴水发生取代反应生成1 mol HBr ,且最多能与1 mol Na 反应。
则香兰素的结构简式是 。
26.(12分)化合物A 是制玻璃的主要原料之一。
常温下,化合物B 、H 、I 为气体,B 不溶于水,H 、I 易溶于水,H 的水溶液呈碱性,I 的水溶液呈酸性。
D 元素是地壳中含量仅次于氧的非金属元素。
化合物J 是一种可用于制造发动机的新型无机非金属材料,其相—CH =CH —CONH OCH 3 COOH H 3CO NH2 COOH对分子质量为140,其中D 元素的质量分数为60 %。
上述物质间的转化关系如下图所示。
(1外,制玻璃的主要原料还有物质(填化学式) 、 。
盛放NaOH 溶液的试剂瓶不能用玻璃塞,原因是(用化学方程式表示)。
(2)D 元素在元素周期表中的位置是 。
(3)H 的电子式是 。
(4)F 和H 反应生成J 和I 反应的化学方程式是 。
(5)下列说法正确的是(填选项序号) 。
a .上述由A 生成D 的单质的反应属于置换反应b .D 元素在自然界中主要以单质形式存在c .G 是含有极性共价键的离子化合物d .I 是强电解质,G 是弱电解质,二者的水溶液都显酸性27.(16分)硫代硫酸钠(Na 2S 2O 3)可由亚硫酸钠和硫粉通过化合反应制得。
已知:Na 2S 2O 3在酸性溶液中不能稳定存在。
(1)某研究小组设计了制备Na 2S 2O 3•5H 2O 的装置和部分操作步骤如下。
I .打开K 1,关闭K 2,向圆底烧瓶中加入足量浓硫酸,加热。
II .C 中的混合液被气流搅动,反应一段时间后,硫粉的量逐渐减少。
当C 中溶液的pH 接近7时即停止C 中的反应,停止加热。
III .过滤C 中的混合液。
IV .将滤液加热浓缩、冷却结晶、过滤、洗涤、烘干,得到产品。
① I 中,圆底烧瓶中发生反应的化学方程式是。
② II 中,“当C 中溶液的pH 接近7时即停止C 中的反应”的原因是。
Cu 片 A B C D 浓硫酸 K 1 K 2 Na 2CO 3溶液 和硫粉 NaOH 溶液“停止C中的反应”的操作是。
③ III中,“过滤”用到的玻璃仪器是(填仪器名称)。
④装置B中盛放的试剂是(填化学式)溶液,其作用是。
(2)依据反应2S2O32—+I2=S4O62—+2I—,可用I2的标准溶液测定产品的纯度。
取5.5 g 产品,配制成100 mL溶液。
取10 mL溶液,以淀粉溶液为指示剂,用浓度为0.050 mol/L I2①判断达到滴定终点的现象是。
② Na2S2O3•5H2O在产品中的质量分数是(计算结果保留1位小数)。
(Na2S2O3•5H2O的式量为248)28.(14分)硝酸是一种重要的化工原料,工业上生产硝酸的主要过程如下。
(1)以N 2和H2为原料合成氨气。
反应:N2(g)+3H2(g)2NH3(g) ΔH<0。
①下列措施可以提高H2的转化率的是(填选项序号)。
a.选择适当的催化剂 b.增大压强c.及时分离生成的NH3 d.升高温度②一定温度下,在密闭容器中充入1 mol N2和3 mol H2发生反应。
若容器容积恒定,达到平衡状态时,气体的总物质的量是原来的1516,则N2的转化率α1=;若容器压强恒定,达到平衡状态时,N2的转化率为α2,则α2α1(填“>”、“<”或“=”)。
(2)以氨气、空气为主要原料制硝酸。
① NH3被氧气催化氧化生成NO的反应的化学方程式是。
②在容积恒定的密闭容器中进行反应2NO(g)+O 2(g)2NO2(g) ΔH>0。
该反应的反应速率(υ)随时间(t)变化的关系如右图所示。
若t2、t4时刻只改变一个条件,下列说法正确的是(填选项序号)。
a.在t1 ~ t2时,可依据容器内气体的压强保持不变判断反应已达到平衡状态b.在t2时,采取的措施可以是升高温度c.在t3 ~ t4时,可依据容器内气体的密度保持不变判断反应已达到平衡状态d.在t5时,容器内NO2(3)硝酸厂常用如下2种方法处理尾气。
①催化还原法:催化剂存在时用H2将NO2还原为N2。
已知:2H2(g) + O2(g)=2H2O(g) ΔH=—483.6 kJ/molN2(g) + 2O2(g)=2NO2(g) ΔH=+ 67.7 kJ/mol则H2还原NO2生成水蒸气反应的热化学方程式是。
②碱液吸收法:用Na2CO3溶液吸收NO2生成CO2。
若每9.2 g NO2和Na2CO3溶液反应时转移电子数为0.1 mol,则反应的离子方程式是。