八年级下册导学导练答案
八下语文导学案答案2018.1
八年级语文导学案答案1 社戏【课内探究】一、1．①作者用饱含深情的笔触，写出了“我”在十一二岁时在平桥村夜航到赵庄看社戏的一段生活经历。
（概括大意符合即可）②七件事：随母归省小住平桥村；钓虾放牛的乡间生活；看社戏前的波折；夜航看社戏途中；赵庄看社戏；看社戏后归航偷豆；六一公公送豆。
详写：看社戏前的波折；夜航看社戏途中；赵庄看社戏；看社戏后归航偷豆四件事。
略写：随母归省小住平桥村；钓虾放牛的乡间生活；六一公公送豆三件事。
2．不可以，因为课文用大量的篇幅写我对平桥村的热爱（“乐土”）和因看不成戏的焦急心情，写了赴赵庄看戏途中的所见所闻所感以及归途中的偷豆、剥豆、烧豆、吃豆等事，这样花费笔墨，非但没有离题，而是紧扣主题的。
因为小说是通过写看戏反映“我”与农村孩子的美好友情，歌颂农村孩子聪明才干和高尚淳朴的优秀品质。
当然，也允许学生有个人的见解，比如，从题目和内容上看，是有些离题。
二、1．（1）所见：①月色便朦胧在这水气里。
②淡黑的起伏的连山，仿佛是踊跃的铁的兽脊似的，都远远地向船尾跑去了。
③……渐望见依稀的赵庄……还有几点火，料想便是戏台，但或者也许是渔火。
④月光又显得格外的皎洁。
⑤回望戏台在灯火光中，却又如初来未到时候一般，又缥缈得像一座仙山楼阁，满被红霞罩着了。
⑥那航船，就像一条大白鱼背着一群孩子在浪花里蹿……所闻：①而且似乎听到歌吹了…… ②那声音大概是横笛，宛转，悠扬…… ③吹到耳边来的又是横笛，很悠扬。
④……连夜渔的几个老渔父，也停了艇子看着喝采起来。
所嗅：两岸的豆麦和河底的水草所发散出来的清香，夹杂在水气中扑面的吹来。
所感：①我的很重的心忽而轻松了，身体也似乎舒展到说不出的大。
②但我还以为船慢。
③……使我的心也沉静，然而又自失起来，觉得要和他弥散在含着豆麦蕴藻之香的夜气里。
④回望……我疑心老旦已经进去了，但也不好意思再说回去看看。
（2）示范品味：我觉得“朦胧”和“皎洁”用得好，好在它们写出了月光的色彩美。
八下语文导学案人教版答案人教版
八下语文导学案人教版答案人教版1、下列词语中，加着重号字的注音不正确的一项是（）[单选题] *A、精湛（zhàn）竣工（jùn）眷属（juàn）B、书籍（jí）违背（wéi）拜谒（yè）C、喘息（quǎn）祭祀（sì）糟粕（pà）(正确答案)D、抵御（yù）阴霾（mái）束缚（fù）2、14. 下列文学常识表述有误的一项是（）[单选题] *A．《桃花源记》选自《陶渊明集》。
陶渊明，又名潜，字元亮，号五柳先生，是我国文学史上第一位田园诗人。
B．“唐宋八大家”，即唐代的韩愈、柳宗元、欧阳修、王安石和宋代的苏轼、苏洵、苏辙、曾巩。
(正确答案)C．“记”是古代的一种文体，可以记叙描写，也可以抒情议论，并通过记事、记物、记人、写景来抒发作者的感情或见解。
D．《诗经》是我国最早的一部诗歌总集，收录了从西周初年至春秋中叶五百多年的诗歌305篇，又称《诗三百》。
3、1“执手相看泪眼，竟无语凝噎”一句出自柳永的《雨霖铃》。
[判断题] *对(正确答案)错4、4. 下列句中加双引号的词语使用正确的一项是（）[单选题] *A．先进文化理念是科技创新的思想源泉，科技创新推动文化产业转型升级，文化和科技是“相辅相成”的。
(正确答案)B．监控画面中，每道工序都清清楚楚、“历历在目”，这有效地保障了食品的卫生和安全。
C．在晚会节目现场，舞蹈演员们的服饰精美华丽、“天衣无缝”。
D．夕阳西下，白浪河水面光影交织，好一派“浮光掠影”的景象。
5、1某老教授在询问对方家人情况时说：“令尊身体可好吗？令弟大学毕业后在哪里高就？令郎小学毕业了吧？”他这样表述是得体的。
[判断题] *对(正确答案)错6、下列词语中，加着重号字的注音正确的一项是（）[单选题] *A、将进酒（qiāng）岑夫子(chén)欢谑（xuè）馔玉（zhuàn）B、虾蟆陵（há）贾人（jiǎ）钿头（diàn）荻花（dí）C、樯橹(qiáng)酹(lèi) 凝噎（yè）兰舟催发(fà)D、郯子（tán）六艺经传（zhuàn）或不焉（fǒu）句读（dòu）(正确答案)7、下列选项中加着重号字注音正确的一项是（）[单选题] *A、脉脉mò忏悔chàn(正确答案)B、狙击zǔ鸟瞰kànC、抨击pēng 发酵xiàoD、干涸hé百舸争流kě8、国粹（cuì）冷炙（zhì）包庇（bì）玄虚（xuán）此组词语中加着重号的字的注音全都正确。
新人教版初中八年级下册物理全册导学案有习题答案免费
一、学习目标1．形成力是一个物体对另一个物体的作用的认识。
2．了解物体间力的作用是相互的。
3．了解力所产生的效果：改变物体的运动状态和改变物体的形状。
二、重点难点形成力的概念，学会从力的作用效果去认识力。
三、复习稳固1．力是_________对_________的作用，力不能脱离________而独立存在。
只要有力发生，就肯定涉及到两个物体：一个________，另一个________。
2．溜旱冰时，用力推墙，人反而被墙推开，这说明________也受到了__________的作用力，此时假设以人为研究对象，人是______物体，墙是______物体，此现象说明_______________________3．物理学中力的单位是______，力的三要素是______、______、______。
力的作用效果是使物体_________或改变物体的__________。
四、自主学习探究一：力的概念问题1：同学们，在你身边周围有哪些行为经常出现力？请你举例：在一般生活中在体育活动中在工农业生产中2．思考：这些现象中，有几个物体？哪个物体用了力？哪个物体受了力归纳以上现象存在的共同的特点：。
得出结论：力就是对的作用。
3．商量交流〔1〕一个物体能不能产生力的作用？〔2〕不接触的两个物体间能产生力的作用吗？举例说明。
探究二：物体间力的作用是相互的1．想一想：为什么我们对物体施加力的作用的同时，自己也会有受力的感觉？2．做一做：〔1〕拍手游戏用自己的左手用力拍击自己的右手，是否只有右手感到疼？分析：左手拍击自己的右手，左手是，右手是；〔受力物体、施力物体〕但左手也感觉到疼，说明左手拍击自己的右手的同时，受到了右手给左手的，此力的施力物体是，受力物体是。
〔2〕学生穿轮滑鞋推墙穿轮滑鞋的学生推墙，观察到的现象是后退了，说明也受到了的推力，此时，学生所受力的施力物体是，受力物体是。
3．归纳总结物体间力的作用是4．商量交流：游泳的时候，我们向后滑水，为什么反而可以向前进？探究三：力的作用效果1．想一想：力是物体对物体的作用，在力的作用下我们可以看到怎样的现象呢？即是说力会有怎样的作用效果呢？2．探究力的作用效果：〔1〕轻轻用力弯刻度尺，刻度尺会由直变；轻轻用力压充气的气球，气球会由圆变；用力拉弹簧，弹簧会，用力压弹簧，弹簧会。
八年级下学期导学案答案
第七章力和运动7.1 科学探究：牛顿第一定律练习题：1、D；2、惯性；压力；3、C。
检测题：1、C；2、D；3、C；4、具有惯性；大（远）；5、D；6、小；大（远）；匀速直线；实验加推理；7、B。
7.2 力的合成练习题：1、B；2、900；东。
检测题：1、作用效果；作用效果；2、5，11；3、5；4、3×103；西；5、（1）等效替代；（2）使F3与F1、F2共同作用的效果相同；（3）F3＝F1－F2；6、人受重力和支持力的作用；这两个力大小相等，方向相反，所以合力为0；7、F1＝75N；F2＝25N。
7.3 力的平衡练习题：1、AB；2、A。
检测题：1、重力；等于；15N；2、D；3、A；4、A；5、D；6、1500；西；减速；300；西；7、图略；茶杯受到的重力和支持力是平衡力；拖车受到的重力和支持力是平衡力；拖车受到的摩擦力和拉力是平衡力；8、（1）可以消除摩擦力对实验的影响；（2）砝码的个数；（3）两个力是否在同一直线上第七章力和运动复习检测题：1、A；2、D；3、C；4、A；5、D；6、500；100；7、（1）小车运动到水平面上的初速度相同；（2）木板；小；（3）匀速直线；8、（1）相等；（2）旋转一定角度；（3）必须在同一物体上；（4）卡片重力可忽略。
第八章压强8.1 压力的作用效果练习题：1、如图；2、10N；5N；竖面5N；水平面10N。
3、压力；受力面积越小；增大甲图压力（或减小乙图的压力、或将乙图的水倒出一部分）。
4、F＝G＝mg=2.5×103kg×10N/kg；S＝4×0.05m2=0.2m2;5、增大压力；减小受力面积。
检测题：1、；2、B；3、A；4、不同；压力相同时，受力面积越小压力作用效果越明显；5、B；6、C；7、（1）受力面积相同时，压力越大压力的作用效果越明显；（2）压力相同时，受力面积越小压力的作用效果越明显；8、压力F＝G＝mg=50kg×10N/kg=500N.故一只鞋底的面积为0.04m2/2=0.02m2.8.2 科学探究：液体压强（1）练习题：1、（1）同种液体，深度越大压强越大；（2）1、4（或2、5；3、6）；2、小；3、＜。
八年级英语(下)学案导学参考答案
参考答案Unit 1Period 1 1.CDBBA2.(1)more(2)less(3)will be(4) less; fewer (5)will study(6)will be(7) will; go (8)watches; will watch Period 2 1.(1)five years ago (2)go to the high school (3)play soccer (4)be in college (5)play the guitar (6)in ten years2.(1)will rain (2)were (3)will write (4)comes (5)are swimming (6)to do (7)went (8)to learn (9)will study (10)swimming3. BDCBD CCABAPeriod 3 1.BBCDC2.(1)What will (2)won’t take (3)Will you (4)What will; do (5)will rain (6)will be3. (1) Dave will be a famous astronaut in five years.(2) I’ll take the train to Beijing./I’ll go to Beijing by train.(3) She’ll live on a space station.(4)Ten years ago, he liked playing tennis.(5) I think there will be more buildings.Period 4 1.(1)live (2)able (3)casually (4)wrote2.(1)fall in love with (2)as a reporter (3)live alone (4)go skating (5)on weekend (6)饲养宠物(7)穿套服(8)度假Period 5 1.In England 2.He’s one meter tall and has a face like a TV screen.3. No,he doesn’t.4.A computer‘tell’him what to do.5.代替Period 6 Ⅰ.1.impossible 2.hundrends 3.fly 4.pollution paniesⅡ.1.the same; as 2.to do 3.took the train 4.fell in love with 5.is able to workⅢ.CACDB DCBCAⅣ.BDCAA DBACAⅤ.1.scientist 2.building 3.toothbrushes 4.dancing Unit 2Period 1 1 .(略)3. (1)Could (2)should (3)could (4)should (5)Could4. (1)We should do as what Mr Wang said.(2) Y ou shouldn’t argue with each other.(3) I don’t have enough money to buy a car.(4) They’re arguing about playing computer games.(5) He should be here now.Period 2 (一)1.wrote;to 2.ask;for 3.borrowed;from 4.to go 5.to stay at home(二)1.get;pay for 2.what I should do 3.borrow;from 4.lend;to 5.should ask; for；money6.Maybe;have a bake sale(三)1.trendy 2.haircut 3.except 4.upset 5.argue 6.include 7.join 8.freedomPeriod 3 1.(1)wrong (2)arguing (3)play (4)either (5)surprised2. (1) to stay (2) argued (3)to buy (4)to get (5)to reach3.DCAEB4. (1) This book is the same as that one.(2) Could you tell me where you will go?(3) He is talking with/to his friend on the phone.(4)Do you have a ticket to the movie?Period 4 1.(1)until (2)except (3)in (4)with 2.BBAACD3. (1)There is nothing else on my desk.(2) My best friend John is the same age as mine.(3) He doesn’t want to fight with his brother.(4) Tony is more popular than me in our school.l(5)I left my book at school, don’t forget to bring it back please.Period 5 (一)AACAB AD(二) 1.My father is very angry with me because I failed in the English test.2. On the one hand, we must study hard; on the other hand, we should do more exercise.3. Students should read all kinds of books and newspapers as much as possible.4. He didn’t go to bed until he finished his homework..Period 6 1 .DCCDA AAAAC2.(1)What’s the matter (2)doesn’t have any; either (3)What will; be like (4) Will;be; No,there won’t (5)What should she do?3. (1) My mother didn’t go to bed until I came home.(2) We should practice speaking English as much as possible.(3) He fell in love with skating at the age of five.(4).I spent 50 yuan on a toy robot/I paid 50 yuan for a toy robot.4. DBACUnit 3Period 1 1.(1)when (2)while (3)While (4)when (5)while2. (1) was reading (2)were having (3)came; was cleaning (4)was playing; was cooking(5) was taking; calledPeriod 2 1.(1)experience (2)imagine (3)follow (4)amazing (5)strange2. (1) were(2) arrived (3) was walking (4) see(5) landed(6) happened (7) got out (8) went (9) do (10) was buyingPeriod 3 1.(1)scared(2)climbed (3)jump(4)happened (5)shout2.(1)was riding (2)What were; doing (3)What did; see (4)wasn’t making (5)Where was(6)How strange (7) While; got outPeriod 4 1.(1)amazed (2)were watching (3)crowed (4)was writing ;left (5)was driving; rained 2.(1)saw a cat in the tree (2)was talking on the phone (3)called Davy’s name(4) was jumping and running (5)when Davy ran awayPeriod 5 1.(1)plane (2)close (3)heard(4)accidents (5)silent (6)called2.(1)was raining (2)to close (3)destroyed (4)flight (5)scared (6)landedPeriod 6 一。
部编版八年级历史下册-导学案全册含答案
部编版八年级历史下册导学案（全册，含答案）第1课中华人民共和国成立班级__________ 姓名__________【学习目标】1.知道第一届中国人民政治协商会议和《中国人民政治协商会议共同纲领》2.了解中华人民共和国开国大典3.理解新中国成立的意义4.知道西藏和平解放的史实【学习重点】第一届中国人民政治协商会议和开国大典【学习难点】新中国成立的历史意义【学习过程】一、自主学习1.中国人民政治协商会议第一届全体会议于年月在召开。
2.大会的内容：①通过了《中国人民政治协商会议共同纲领》，起的作用；②当选为中央人民政府主席；③决定改北平为_________作为首都，以为代国歌，以___________为国旗，采用_______纪年。
3.中华人民共和国的成立，开辟了中国历史的。
推翻了、封建主义和的统治。
中国真正成为的国家，壮大了世界和平民主和的力量。
4. 年，西藏和平解放。
至此，获得统一，各族人民实现了大团结。
二、合作探究1.阅读人民英雄纪念碑碑文，想一想“三年以来”“三十年以来”“一千八百四十年”的含义是什么。
2.如何理解“中国人民从此站起来了”？三、练习巩固1.下列选项属于第一届中国人民政治协商会议内容的是（）①通过了《共同纲领》②选举毛泽东为中央人民政府主席③以北平为首都并改名为北京④采用公元纪年A.①②③B.②③④C.②④D.①②③④2.新中国成立初期，起临时宪法作用的是（）A.《中国人民政治协商会共同纲领》B.《中华人民共和国宪法》C.《中华人民共和国刑法》D.《中华人民共和国土地改革法》3.下列对中华人民共和国的成立，表述不正确的是（）A.新中国的成立，开辟了人类历史新纪元B.新中国的成立结束了一百多年来被侵略奴役的屈辱历史C.新中国的成立，壮大了世界社会主义力量D.新中国的成立表明全国所有地区全部解放4.中国大陆获得统一，各民族人民实现大团结的标志性事件是（）A.西藏地区和平解放B.香港、澳门回归C.中华人民共和国成立D.第一届政协会议召开5.请结合课文相关内容回答下列问题。
新教科版物理八年级下册全套导学案含答案
八年级物理下册全套同步练习（教科版）第七章 力一、什么是力发展目标1．知识与技能理解力是一个物体对另一个物体的作用 知道物体间力的作用是相互的 知道力的作用效果 2．过程与方法让学生经历和体验归纳概括力的初步概念的过程；培养学生表述自己的观点，初步具有评估和听取反馈意见的能力； 培养学生"从生活走向物理，从物理走向社会"的基本理念。
3．情感态度与价值观保持对力现象的好奇，初步领略力现象中的美妙与和谐，对自然现象有亲近、热爱和谐相处的情感；具有对科学的求知欲，有将自己的见解公开并与他人交流的欲望，认识交流与合作的重要性，有主动与他人合作的精神，敢于提出与别人不同的见解，也勇于放弃或修正自己的错误观点。
典例精析【例1】如图所示的的四个力中，使受力物体的运动状态发生改变的是（ ）【分析】A 、B 、C 三图中所施的力改变了物体的形状，D 图中磁铁改变了小球的运动方向，即改变了物体的运动状态。
【解答】D【例2】推出去的铅球，在空中飞行时，是否还受到手的推力作用？【分析】本题发生的力的作用是在手与铅球之间进行的，相互作用的力是同时产生，同时消失的。
本题的关键是铅球已脱离手在空中飞行，说明手与铅球之间已不发生力的作用。
【解答】推出去在空中飞行的铅球不受手的推力作用 【例3】相互接触的两物体之间一定发生力的作用吗？【分析】物体间的作用分为接触的和不接触的两种，如磁铁吸铁钉属于不接触产生力的作用。
但直接接触的物体之间也不一定发生力的作用。
例如:如图的A 、B 两球静止在光滑水平面上，它们 彼此接触，但并没有产生力的效果（没有发生挤压变形）， 也就不会有力的作用。
【解答】相互接触的物体之间一定发生力的作用，这种说法是错误的。
力能使物体发生形变，力也能改变物体的运动状态，反之，人们可以通过物体是否发生形变或物体的运动状态是否改变，来判断物体是否受到了力的作用。
发展与评价基础知识 1． 日常生活所见的推拉、提压、摩擦、碰撞、吸引和排斥等作用都称为力。
人教新目标版八年级英语下册导学案第九单元(含答案)
人教新目标版八年级英语下册导学案第九单元(含答案)人教新目标版八年级英语下册导学案Unit 9 Have you ever been to a museum?1.掌握并灵活运用本课的重点词汇：amusement ，somewhere ，camera ，invention ，the National Science Museum2.重点短语：learn about ，put up a tent ，somewhere interesting ，be interested in ，a few times ，on our last school trip3.重点难点：学会谈论过去的经历及听、说能力。
1.To learn the target language Have you ever been to ...?学习运用目标语言。
e the target language to talk about past experiences 运用现在完成时谈论过去的经历。
3.重点难点：学会谈论过去的经历及听、说能力。
✂【自主预习】Ⅰ.英汉短语互译。
1.去年2.我也没有3.对……感兴趣4. 离……远5.打算做……6.在过去学习任务学习目标学习内容 Section A 1a _—2d式等其他定语则必须后置。
[活学活用]（）When I retired, I would like to go _____________.A. relaxing somewhereB. somewhere relaxingC. nowhere relaxingD. anywhere relaxin g【合作探究】Ⅰ.听力训练Section A 1b Listen again and choose the best answers. And answer the following questions. ( )1.When did Sarah go to the National Science Museum ?A. last monthB. last yearC. last week( )2.Has Sarah ever been to a history museum?A. Yes, she has.B. No, she hasn’t.C. We don’t know.3.What does Claudia say about history?_____________________________________________________.Section A 2b Listen again. Fill in the blanks.Linda________ to the space museum last year. They are going to ________________ to the museum. Linda ________________ the amusement park. She is going to the amusement park again ___________.Frank________________ the water park. He is ________________ with his friends.Ⅱ．阅读表达Section A 2d Read the conversation and answer the questions.1.Has Jill ever been to the film museum?(no more than 3 words)2.What did Jill do on the weekend? (no more than 5 words)3.When did Jill go to the film museum back? (no more than 2 words)________________________________________ ________4.Did Jill learn about the inventions that led tocolor movies?(no more than 3 words)5.Who put up a tent and cooked outside?(no more than 4 words)Ⅲ．语言点1.区分have/has been to/have/has gone to/have been inhave /has been to 强调的是曾经去了某个地方并回来了；have/has gone to强调的是去了某个地方还没有回来。
人教版八年级生物下册全册导学案(附答案)
人教版八年级生物下册全册导学案（附答案）八年级生物下册第八单元健康地生活第三章了解自己增进健康导学2第二节选择健康的生活方式【学习目标】．分析几种疾病的死亡率，认识生活方式对人体健康的影响。
．探究"酒精或烟草浸出液对水蚤心率的影响"．.认识到酗酒和吸烟对人体健康的危害；认识毒品对健康的危害。
．学会选择健康的生活方式【学习过程】一、自主学习．生活方式是指人们在日常生活中所遵循的各种_________,如__________、____________、_____________、___________和___________，等等。
人们的生活方式与____________有密切关系。
．健康的生活方式不仅有利于___________,而且有利于提高人们的___________,提高_____________。
．烟草燃烧时，烟雾中含有多种对人体____________的物质，如__________、__________等，这些物质进入人体，不仅能诱发多种呼吸系统疾病，如___________，还有可能会诱发_____________。
．吸毒会损害人的____________系统，降低人体的____________功能，并使__________受损，呼吸麻痹，严重的会导致死亡。
．世界卫生组织将____________定为“世界无烟日”，将______________定为“国际禁毒日”。
二、合作探究全班同学分成男生组和女生组，男生列举健康的生活方式，女生列举不健康的生活方式，列举的越多越好，并展开5分钟的辩论赛。
男生组探究酒精对水蚤心律的影响，设计的方案如下提出问题：酒精对水蚤心率有影响吗？作出假设：酒精对水蚤心率有。
或者酒精对水蚤心率有。
设计计划：在实验时可配制如下的不同浓度梯度的酒精：1%、3%、5%、8%、10%、15%、20%等。
在15℃左右的室温中经过大量的实验，并在实验中选择10s内水蚤跳动范围在30～36次之间的成年水蚤为材料，经过多次实验得到以下平均数值，分实验组和对照组。
八年级下英语导学答案八下英语导学新作业答案
八年级下英语导学答案八下英语导学新作业答案八下英语导学新作业答案Unit9 Section B.一、学习目标1) 单词与短语exchange student, attendant, flight attendant, discover, requirement, guide, tour guide2)目标句型:1. where do you want to go?2. how long have you been doing…?3. what do you like best about doing sth.?4. what kind of job do you want?5. how do/did you do sth.?3) 语法现在完成时态。
二、教学重点和难点1(教学重点:现在完成时态。
2(教学难点:现在完成时态。
1三、知识链接现在完成进行时态。
四、学法指导:通过小组合作学习，探究讨论，结合导学案及相关资料理解各知识点，掌握本节学习内容。
五、导学过程:1. 组长带领组员复习现在完成进行时。
2. 组长带领组员通读课本from page 71 to 72,理解其含义并完成表格。
3. 组长带领组员熟读3a课文，并指定课堂朗读人选。
4. 组长带领组员找出课本(from page 71 to 72)的重要短语、句子。
并指定课堂展示人选。
5. language points:(一)have been to / have gone to区别have been to表示曾经去过某处，但现在人不在那了。
可以和次数连用。
i have been to beijing. i went there last year.i have been to shanghai twice.如遇到adv.(where, here, there, home, abroad)省略to. have you ever been abroad?2where have you been?have gone to 已经去了某地，现在人可能在去的途中或返回途中，或已在那了。
新人教版初二下学期 导学案：第8章参考答案
第八章第一节参考答案学点一跟踪：（1）热能（2）光能（3）机械能（4）热能。
学点二跟踪1、B2、70。
.达标检测：1、（1）AI（2）DFG（3）BCH（4）E。
2、1，3.6×106，4。
3、2.5，9×106。
4、1.65×105J第八章第二节参考答案达标检测答案：1. 7200 3 2.1:1 2:1 2:1 1:2 1:1 1:23.额定电压为220V 额定功率为25W 20.66W4.250W 0.165.76×105 5.D第八章第三节参考答案【巩固与提高】1.（1）P＝UI；（2）灯炮、滑动变阻器、电流表、电压表、滑动变阻器、电流表、电压表；（3）①断开；②最大阻值；（4）②b、a；【当堂达标】：1.2×1012、2×1092.1936、6.25作业：1.B 2.略§8.4电与热【跟踪练习一】1.B2.⑴略⑵使通过AB的电流相同⑶电流通过导体时产生的热量与导体的电阻成正比3.C【跟踪练习二】1.480J2.⑴107.6Ω⑵270000J ⑶40W【当堂达标】1.D2.B3.电阻串联控制变量法温度计示数的高低转换法4.略5.1100W 44Ω§8.5电功率和安全用电【跟踪练习一】1.230010.5 132302.D3.D【跟踪练习二】1.D2.C3.C4.275.B【当堂达标】1.用电器总功率过大2. A3. B4. D5. C6.略§8.6生活用电常识【跟踪练习一】1.略2.A【跟踪练习二】1.导体甲右2.甲丙【跟踪练习三】 A【跟踪练习四】1.C2.C【当堂达标】1.A2.甲3.D4.C5.D6.略。
人教版八年级下册数学教案导学案及答案全册
请同学们跟着教师00千米所用的时间为 小时，逆流航行60千米所用时间 小时，所以 = .
[分析] 这道例题的分式的分子、分母是多项式，应先把多项式分解因式，再进行约分.结果的分母如果不是单一的多项式，而是多个多项式相乘是不必把它们展开.
P15例.
[分析]这道应用题有两问，第一问是：哪一种小麦的单位面积产量最高？先分别求出“丰收1号”、“丰收2号”小麦试验田的面积，再分别求出“丰收1号”、“丰收2号”小麦试验田的单位面积产量，分别是 、 ，还要判断出以上两个分式的值，哪一个值更大.要根据问题的实际意义可知a>1,因此(a-1)2=a2-2a+1<a2-2+1,即(a-1)2<a2-1，可得出“丰收2号”单位面积产量高.
[分析] 约分是应用分式的基本性质把分式的分子、分母同除以同一个整式，使分式的值不变.所以要找准分子和分母的公因式，约分的结果要是最简分式.
P11例4．通分：
[分析] 通分要想确定各分式的公分母，一般的取系数的最小公倍数，以及所有因式的最高次幂的积，作为最简公分母.
（补充）例5.不改变分式的值，使下列分式的分子和分母都不含“-”号.
， ， ， ， 。
[分析]每个分式的分子、分母和分式本身都有自己的符号，其中两个符号同时改变，分式的值不变.
解： = ， = ， = ， = ， = 。
六、随堂练习
1．填空：
(1) = (2) =
（3) = (4) =
2．约分：
（1） （2） （3） （4）
3．通分：
人教版数学2020年八年级下册全套导学案(含答案)
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第十八章 平形四边形
18.1 平形四边形 …………………………………………………( 46 ) 18.1.2 平形四边形的判定（1）……………………………( 51 ) 18.1.2 平形四边形的判定（2）………………………………( 56 )
18.2 特殊的平形四边形 …………………………………………( 63 ) 18.2.1 矩形 …………………………………………………( 63 ) 18.2.1 矩形的性质 …………………………………………( 63 ) 18.2.1.2 矩形的判定 ………………………………………( 69 ) 18.2.2 菱形 …………………………………………………( 74 ) 18.2.3 正方形 ………………………………………………( 79 ) 18.2.3.1 正方形的性质………………………………………( 79 ) 18.2.3.2 正方形的判定………………………………………( 79 )
2021 2八下导学案答案2021122
2021 2八下导学案答案202112220212八下导学案答案20211222021.2八下导学案答案2021122第1章代代相传的生命第1节：指南针为什么能指方向(1)1、略，2、c，3、b，4、c，5、b，6、c，7、a第1节：指南针为什么能指方向(2)1、c，2、c，3、d，4、d，5、b，6、略，7、b。
第2节：电生磁(1)1、c，2、a，3、b，4、d，5、略，6、b。
第2节：电生磁(2)1、a，2、d，3、c，4、能够迎合大头针、无法迎合大头针、电流减小、电流增大、线圈匝数越多磁场越弱；5、（1）迎合大头针的多少，（2）线圈匝数、电流越大，（3）1和4、线圈匝数越多，6、b。
第3节：电磁铁的应用1、高、强、低、弱，2、灯2，3、（1）电磁铁，（2）红灯，（3）绿灯，4、略第4节电动机1、d，2、b，3、c，4、a，5、(1)电流(2)磁场、力、电流、磁场，6、电动机、旋转、电能、机械，7、c，8、c，9、b，10、略。
第5节磁生电1、d，2、d，3、a，4、a，5、b，6、电磁感应、大力推进摇晃速度，7、电、变化，8、研磨磁感线、导体、机械能转变电能，9、（1）线圈输出功率、线圈转为、（2）机械能、（3）1、2（4）电流。
第6节家庭用电（1）1、电能表、断路器、插座，2、辨别火线零线、笔尖金属体、笔尾金属体，3、并、并、串、串、电流过大时切断电路，4、d，5、c，6、a，7、a，8、丙、火线、100000欧，9、b，10、c。
第6节家庭用电（2）1、闸刀开关熔断器短路负载2、b3、a4、a5、d6、b7、b8、c第7节电的安全使用1、362、火线不碰触扰动带电体不紧邻高压带电体3、b4、c5、c、6、d、7、d8、b9、c10、b第1节模型、符号的创建与促进作用1、b，2、b，3、c．第2节物质的微观粒子模型1、分子、原子、分子、原子、分子、原子、分子、原子，2、b，3、c，4、d，5、d，6、c，7、c，8、d。
初二英语导学答案.txt
导学与演练英语八年级（下）·人教版·新目标八年级英语（下学期）听力材料及参考答案Unit 1Will people have robots?听力材料：A(读一遍)1What are you going to do this evening?2Shall we play computer games after we finish our homework, mum?3Will it rain the day after tomorrow?4Are there any parrots in the Zoo?5Does Tom often go swimming with his friends?B(读两遍)6A:What will you do this weekend?B:Let's go to the library, shall we?A:Good idea.Question:What will they do?7A:How often does Tom do sports?B:Twice a week.Question:Does Tom do sports twice a week?8A:Miss Wan, when will the class meeting begin?B:At 2∶30 this afternoon.Question:What are they talking about?9A:How many boys are there in the room, John?B:Mike, Jim and I.Question:How many boys are there in the room?10A:What's the matter, Tony?B:I have a headache.Question:What should Tony do?参考答案：1-5ABCBB6-10BCACB11did clean12have13will/is, take/going to take14 will come/is coming15Do, go16took, rides17are, doing, am practicing18 to feed19doing, went to see20is, was21will22homes23swept24be25card26only27so28won't29study30on31paper32cards33 buildings34unpleasant35predict36use37astronaut38alone39is ableto40falls in love with41go skating42apartments43earth44wrote45 pollution46are sweeping,are going to sweep, will sweep, swept47won't finish, Will, finish, will, won't48Did, leave49How many pets does,have50What will, do51-55.DBCCD56-60.BCDBA61-65.CDEBA66-70.ABBCC71-75.DBCDB76-80.DACDB81stay at home82went to a movie/went to the cinema/saw a film83. Both of them/Mr and Mrs Jones84.a man and a woman running along the road85they didn't want to do the dishes 书面表达略Unit 2What should I do?听力材料：A(读一遍)1Did you hear someone playing the piano yesterday afternoon?2Could Lily swim when she was four years old?3Where are they going on a trip tomerrow?4It's four o'clock now. Is it time for us to have supper?5You are a very clever girl.B(读两遍)6A:How many people are there in your family?B:Five. My grandparents, my parents and I.Question:How many people are there in the family?7A:Do you often clean the classroom?B:NO,we don't.Question:Don't the students often clean the classroom?8A:Shall we visit the factory today or tomorrow?B:Tomorrow, I think.Question:Will they visit the factory?9A:It's sunny today. Let's go camping.B:That's a good idea.Question:What are they going to do?10.A:This is my brother Jack. He's working in a factory.B:Nice to meet you, Jack.A:Nice to meet you,too.Question:What does jack do?参考答案：1-5CCCBA6-10ACBCB11louder12argument13should14units15advice16 either17to pay for18except19ticket20wrong21include22surprised23 getting on24out of style25keep out26.are able to finish27Either Linda or Rose can, Both Linda and Rose can28What's the matter29is too young to30 won't go, until31What should, do32How much advice does, give33-36CBDC37-40 ACDC41-45CABCB46-50BCDBB51-55ACBBD56the left side of the street57 learn how to take buses and underground trains58stop an look to the right frist59 pay for their fares60Traffic in Britain书面表达：略Unit 3What were you doing when the UFO arrived?听力材料：A(读一遍)1Lucy is standing in front of the lirbray.B(读两遍)2Boys,did you see any aliens last night?3We were watching TV in the living room at 9∶00 yesterday morning.4I dreamed an amazing UFO some times before.5When the hero was getting out of the car, I met him at once.B(读两遍)6It was raining when I left home this evening.7The students were talking about the photos when the teacher came in.8The alien from the UFO was wearing strange clothes.9He found it difficult to move when he waw the UFO.10They heard someone shouting next door when the UFO landed.参考答案：1-5ABCBC6-10BCCAB11buildings12jumping13bought14silent15 themselves16in front of 17while18ran away19landed20taken place21follow22as,as23was surprised24get out25kid26What will, do27 What were, doing28slept late/stayed up29"Hello" to;invite him to30Yes, I do./No,I don't.31was doing32Whatwas,doing33.wasn't talking34How are, getting35When was, selling36-40 ABD61-65.FTFFT66he didn't know English67he didn't konw the name of the street68The young woman and the old man didn't help the Frenchman69was going out for a walk70.书面表达：略Unit 4He said I was hard-working.听力材料：A(读一遍)1When I went to see him, he was washing clothes.Question:What was he doing?2Lin Tao gets an English-Chinese dictionary. But he doesn't get a Chinese-English one.Question:What doesn't Lin Tao get?3Judy wrote a letter a few minutes ago. And Jane wrote one an hour ago. Question:When did Jane write her letter?4Brace has two books and Jim has six.Question:How many books do they have?5Li Lei is younger than Jim, and Kate is younger than Li Lei.Question:Who is the youngest?B(读两遍)A:Hi,Marcia. You are here,too.B:Hi,Linda.Do you often go shopping in the supermarket?A:Yes,what do you want to buy today?B:Oh, my mother asked me to buy some food,drinks and so on.A:Why?B:She invited some frieds to our home for dinner today.A:How many friends?B:Uncle Wang,Aunt Li,and other eight peolpe.A:I see. You need a lot of things.B:Yes.Fruit, beef,vegetables,sugar,salt and some oil.A:You can't carry all the things.Let me help you.B:Thank you very much.参考答案：1-5CCCAC6-10BCCBC11copy12nervous13true14decision/dream15dormitories16disappointed17be in good health18got over19suppose20 anymore21hers22First of all23do better in24own25pass on26he could27 they were,after28she would go29she was30I will call31I am Ann's32 We are going, tomorrow33I was34-38CDCBC39-43BCDBC44-4849card50OK/well51said52not53at54How/What55science/it56did57I58harder59-63CDAAB64-68BDCCB69-73BCCBC74talking about the weather75 hardly ever agree with each other76they need water for their crops/their crops need much water77 a sunny day, eat their lunch in the rain78fewer mistakes 书面表达：略Unit 5If you go to the party, you'll have a great time!听力材料：A(读一遍)1What do you think life will be like in 100 years?2I was sitting in the barber's chair when the UFO arrived.3Are you able to sing the song in English?4Maybe your brother could have a bake sale.5Ann is getting on very well with her new classmates.B(读两遍)6.A:Tim. I think I will be a professional athlete.B:Really? I'm not sure. Maybe I want to be a policeman.Question:What are they talking about?7.A:Mr Wu, I didn't do well in English. What should I do next?B:You should read more and write more.Question:What should the student do next?8.A:Lily. Can you help me do the dishes?B:Sorry. mum, I am doing the laundry.Question:Where are they?9.A:I was reading at 9 o'clock yesterday evening. How about you, Jim?B:Oh, I was watching a football match at that time.Question:What was Jim doing at that time?10.A:It's 7∶00 o'clock now. My child, please hurry.B:Don't worry, granny. If I take a bus, I won't be late for school.Question:Will the child be late for shool if she takes a bus?C(读三遍)Mr White had a farm in England. He and his wife lived in a town far from the big cities. Oneday Mr White said to his wife,"Dear, let's go to London next Sunday. We can have a good lunch there,and then we can go to the cinema."His wife was very happy when she heard this, because she and her husband, always ate a lot, and she didn't like cooking three times very day. They went to London by train and hung out for an hour. When it was twelve o'clock, they wanted to have a meal. They had a look at a few restaurants. In one of them there were some blackboards. On one of the blackboards outaide was "Lunch 12∶30 to 2∶30 ,￡150"."Well, that's good,"Mrs White said,"We can eat for two hours for ￡1.50 here. This is the place for us."参考答案：1-5ABCBC6-10BCBAC11-15FFTFT16fatter17lawyer18to improve19 luckily20companies21alone22failed23tutors/teachers24themselves25cut26ate/had27heroes28Hers29against30faster31windows32 anymore33envelope34jeans35alien36got,were having37was talking, came38to learn39comes, will tell40agrees41think42were, doing43shout44 to tell45going46Will,be47took48Did,swim49drawing50will,play51 When did,learn52What were, doing53How much, is there54What will,do55 What was,doing56too weak to say57won't until58to have59nothing;don't know anything60don't move61won't take62will visit,if he is63Howbrightly64How pretty;What a pretty girl65-69BABDC70-74DCCBB75-79CFEBA80-84CDCAA85-89CBBCA90-94BCDAC95-99BCBDB100three101enjoying102talking103leaving104possible105without106missed107 soon108should109friends书面表达：略综合检测一(Units 1-5)听力材料A(读一遍)1"What's Xiao Fang doing, Sam?""She's playing volleyball."2Maria is good at dancing. Look, she's dancing.3"Can you ski, Sam?""Yes,I can."4Maria is going to play the violin at the party tonight.5"Who's that boy?""Which boy?""The boy who's riding a horse."B(读两遍)6Will people have robots at home in the future?7What should I do if I argued with my best friend?8What were you doing when the UFO arrived?9Are you going to the party?10Why don't you come to play basketball with us?C(读两遍)11.W:I think there will be less pollution in 10 years.M:Yeah, I agree with you.Question:What does the woman think?12.W:What's wrong with you, Mike?N:My clothes are out of style.W:Maybe you should buy some new clothes.Question:What's the matter with Mike?13.W:What was the girl doing while the UFO took off?M:She was eating ice-cream in front of the Center Store.Question:What was the girl doing while the UFO took off?14.W:What did Marcia say?M:She saik she was naving a surprise party for Lana on Friday night.Question:Who was going to have a party?15.W:When is a good time to have the party?M:Let's have it today.W:No,today is Friday. Why not have it on Saturday?M:Good idea.Question:When are they having their party?D(读三遍)Yesterday Susan went to the cinema. She met an old woman in the street.She stoppedand asked,"Why are you standing at the street corner? What's the matter?""I am going to the hospital to see my husband. But I don't know the way."said the old woman. "Don't worry! Let me help you."Susan said,"Go along this street until you reach the end. You can see the hospital. But it's quite a long way from here. You'd better catch a bus there."said Susan.参考答案：1-5CEABD6-10BCBAB11-15CAACB16-20FFTFT21be/become22writing23 when24at25be like/happen26fewer27inexpensive28visiting29better30professional31best32start33if34hers35bad36-40BCADA41-45 DBCCA46-50ADBAA51-55AABCD61-65ACDCA66-70BBDAC71-75BBCAD76-80BADCD 书面表达：略Unit 6How long have you been collecting shells?听力材料：A(读一遍)1A:Maria, when did you start studying Chinese?B:In 2006.2A:Sam, how long did you exercise yesterday?B:For two hours.3A:Alison, how long have you been skating today?B:I have been skating for seven hours.4A:When did you start reading English this morning, Wang Wei?B:At 6∶30.5A:What sport do you play, Ellen?B:I play soccer.参考答案：1-5BBACA6capital7thousand8collecting9since10certain11pairs12 anyone13European14store15foreighers16Qing Dynasty17-3031for32 for33since34for35since36for37have38have39has40has,has41 has42Have43-45CAC46-50BCDBC51-55CDBCD56-60BCBDD61-65BACAD66 found a paying job67for youngsters and the elder people/to encourage people of different generation to68they want/they like69with a great70Helping other people makes Spenser书面表达：略Unit 7Would you mind turning down the music?听力材料：A(读一遍)1A:Would you mind going to bed at once? it's too late.B:Ok.Mom, I'll go to bed now.2A:Tom, would you mind lending me your pen?B:Ok, here you are.3A:Lucy, would you mind looking after my dog for a minute?B:Sorry, I have something to do.4A:Would you mind giving me a glass of water, Waitress?B:Ok, here you are, Sir.5A:Sarah, would you mind not speaking loudly?B:Sorry. I must do that. Or my grandpa can not hera me.B(读两遍)6A:Peter, would you mind getting up? It's eleven o'clock. You have to clean the yard!B:OK, Mum. I'm getting up now.7A:Lucy, would you mind not making so much moise? Turn down your music.B:OK, dad, I'll turn it down at once.8A:Linda, would you mind cleaning your room?B:OK.I'll do it right away.9A:Would you mind moving your bike, sir?B:Not at all. I'll do it right away.10A:Would you mind not playing soccer here, boys? Your ball will break the windows. B:We're sorry, madam. We are leaving now.参考答案：1-5BABCC6eleven, yard7music8room9bike10soccer,windows11.a pair of12Put on13in a minute14help you with15cutting in line16turning down17 picking up18put out19mind20happens21started22to argue23badly24 well25terrible26best27ready28Would you mind not playing football in the classroom?29Would you mind opening the box for me?30Would you mind giving me another book?31Would you mind not eating in class?32Would you mind doing me a favor?33-37BBDBA38-42BBCCD43-47CBBDD48-52ACDBD53Swimming.54No, not only the writer. Many people else love splashing around in the water.55 Three.56Because he thinks that swimming is easy to learn and it is very cheap, too.57-60Unit 8Why don't you get her a scarf?听力材料：A内选择正确的词语填空。
新教科版物理八年级下册全套导学案含答案【精品】
八年级物理下册全套同步练习（教科版）第七章 力一、什么是力发展目标1．知识与技能理解力是一个物体对另一个物体的作用知道物体间力的作用是相互的知道力的作用效果2．过程与方法让学生经历和体验归纳概括力的初步概念的过程；培养学生表述自己的观点，初步具有评估和听取反馈意见的能力；培养学生"从生活走向物理，从物理走向社会"的基本理念。
3．情感态度与价值观保持对力现象的好奇，初步领略力现象中的美妙与和谐，对自然现象有亲近、热爱和谐相处的情感；具有对科学的求知欲，有将自己的见解公开并与他人交流的欲望，认识交流与合作的重要性，有主动与他人合作的精神，敢于提出与别人不同的见解，也勇于放弃或修正自己的错误观点。
典例精析【例1】 如图所示的的四个力中，使受力物体的运动状态发生改变的是（ ）【分析】A 、B 、C 三图中所施的力改变了物体的形状，D 图中磁铁改变了小球的运动方向，即改变了物体的运动状态。
【解答】D【例2】推出去的铅球，在空中飞行时，是否还受到手的推力作用？【分析】本题发生的力的作用是在手与铅球之间进行的，相互作用的力是同时产生，同时消失的。
本题的关键是铅球已脱离手在空中飞行，说明手与铅球之间已不发生力的作用。
【解答】推出去在空中飞行的铅球不受手的推力作用【例3】相互接触的两物体之间一定发生力的作用吗？【分析】物体间的作用分为接触的和不接触的两种，如磁铁吸铁钉属于不接触产生力的作用。
但直接接触的物体之间也不一定发生力的作用。
例如:如图的A 、B 两球静止在光滑水平面上，它们 彼此接触，但并没有产生力的效果（没有发生挤压变形），也就不会有力的作用。
【解答】相互接触的物体之间一定发生力的作用，这种说法是错误的。
力能使物体发生形变，力也能改变物体的运动状态，反之，人们可以通过物体是否发生形变或物体的运动状态是否改变，来判断物体是否受到了力的作用。
发展与评价基础知识1． 日常生活所见的推拉、提压、摩擦、碰撞、吸引和排斥等作用都称为力。