八上全效学习答案
全效学习八上数学15.2.3 第2课时 科学记数法
A．4×106
C．4×10－5
B．4×10－6
D．4×105
3．[2014· 泰安]PM2.5是指大气中直径≤0.000 002 5 m的颗粒物，将 0.000 002 5用科学记数法表示为 A．2.5×10－7 C．25×10－7 B．2.5×10－6 D．0.25×10－5 ( B )
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示时，10的指数为－(n＋1)； (2)对于绝对值小于1的负数，用科学记数法表示时，首 先把它的绝对值表示成a×10－n的形式，然后在a的前面 添上“－”号即可，表示成－a×10－n(其中1≤a<10，n为 正整数)的形式．
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纳：所有的实数R都可以用科学记数法表示，当|R|≥10时， 正整数 ；当1≤|R|<10时，10的指数为 10的指数为__________ 负整数 ． 0；当|R|<1时，10的指数为__________
(2)因为1.8÷200＝0.009＝9×10－3，所以每一页纸的厚度约为 9×10－3cm. 【点悟】 用科学记数法表示数A，首先要考虑|A|的情况，再 来确定n的值．而a×10n中的a的绝对值是整数数位只有一位的
数．
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首页Βιβλιοθήκη 末页类型之三
含有科学记数法表示的数的运算
计算：(1)(3×10－5)×(5×10－3)； (2)(3×10－15)÷(5×10－4)；
算．不过要注意把a×10n看成一个单项式，10n与10m看成同底数的幂．
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英语全效学习八年级上册答案
英语全效学习八年级上册答案听力理解一、听后选择听对话或独白,根据对话或独白的内容,从下面各题所给的A、B、C三个选项中选择最佳选项。
每段对话或独白你将听两遍。
请听一段对话,完成第1至第2小题。
1. What is Peter doing?A. He's doing homework.B. He's having lunch.C. He's playing soccer.2. What classis the poster for?A. The science class.B. The English class.C. The history class.请听一段对话,完成第3至第4小题。
3.What does the girl like doing?A. Playing chess.B. Playing basketballC. Playing the guitar.4. How often does she practice?A. Once a week.B. Twice a week.C. Three times a week.请听一段对话,完成第5至第6小题。
5. How did the woman go to the county?A. By bus.B. By train.C. On foot.6. What did the man do last weekend?A. He repaired his car.B. He bought a new car.C. He made a model car.请听一段独白,完成第7至第8小题。
7. Which book is about happiness?A. Shallow Earth.B. Great Expectations.C. Jump for the Stars.8. What's the purpose of the speaker?A. To introduce three books.B. To sell books to the students.C. To ask students to join a book club.二、听后回答听对话,根据对话内容笔头回答问题。
八上科学全效学习答案
八上科学全效学习答案八上科学全效学习答案：第一章科学怎样研究自然界1.1 科学研究自然界的过程科学研究自然界是通过观察自然现象、提出问题、设计实验、收集数据、归纳总结得出科学结论的过程。
1.2 科学家如何工作科学家进行实验前，需要预先想好问题，制订实验方案，并收集材料和资料。
实验中间需要记录数据，总结实验结果。
实验完成后，需要做结论并将实验结果发表出来，让其他人评价。
第二章物质的组成和性质2.1 组成物质的微粒物质由分子和原子构成，分子由原子组成，原子由原子核和电子组成。
2.2 物质的三态及相互转化物质在不同的状态之间相互转化，包括固体、液体和气体。
2.3 物质的性质和分类物质性质包括物理性质和化学性质。
物质可以分为元素、化合物、混合物等。
第三章物理变化和化学变化3.1 物理变化与化学变化的区别物理变化是指物质在物理状态上的改变，如物质的形状、颜色、状态改变。
化学变化指物质的分子或原子发生变化，如新物质的产生、产生气体等。
3.2 化学变化的表征化学变化的表征包括视觉表征、物理表征和化学表征。
3.3 化学反应的平衡化学反应中反应物和生成物之间的比例关系称为化学反应的平衡。
第四章物质的运动和能量转化4.1 物质的运动状态物质的运动状态可分为匀速直线运动、变速直线运动、匀速曲线运动和变速曲线运动。
4.2 动能和势能物体由于能量而拥有的运动状态被称为动能，物体由于位置而拥有的能量被称为势能。
4.3 能量的转化和守恒能量可以在物质之间转化，包括动能转化为势能、势能转化为动能、能量转化为热能等。
能量守恒定律指的是在任何一个封闭系统内，能量的总量是不变的。
第五章光的传播和成像5.1 光的传播和颜色光在介质之间传播的方式有直线传播和折射传播。
颜色是由光的颜色的种类和比例决定的。
5.2 光的反射和成像光线经过反射可以形成成像，包括平面镜成像、凸透镜成像和凹透镜成像。
第六章机械运动基本定律6.1 动力学基本概念动力学包括质点运动定律、牛顿定律、受力分析等。
全效英语八年级上册参考答案
全效英语八年级上册参考答案1、--All of you have passed the test!--_______ pleasant news you have told us! [单选题] *A. HowB. How aC. What(正确答案)D. What a2、11．________ big furniture shop it is! [单选题] *A．HowB．WhatC．What a (正确答案)D．What an3、Every morning John takes a（）to his office. [单选题] *A. 20-minutes' walkB. 20 minute ' walkC. 20-minutes walkD. 20-minute walk(正确答案)4、I couldn’t find Peter,_____did I know where he had gone. [单选题] *A.nor(正确答案)B.eitherC.neverD.as5、Our campus is _____ big that we need a bike to make it. [单选题] *A. veryB. so(正确答案)C. suchD. much6、We had ____ wonderful lunch last Saturday. [单选题] *A. /B. theC. oneD. a(正确答案)7、What _______ would you like, sir? [单选题] *A. otherB. else(正确答案)C. othersD. another8、( )He killed the enemy guard and made away _________the villagers. [单选题] *A. with the helpB. with helpC. with help ofD. with the help of(正确答案)9、7．—I've got some ________.—Great! I'd like to write with it. [单选题] * A．funB．chalk(正确答案)C．waterD．time10、There are sixty _______ in an hour. [单选题] *A. hoursB. daysC. minutes(正确答案)D. seconds11、Leave your key with a neighbor ___ you lock yourself out one day [单选题] *A. ever sinceB. even ifC. soon afterD. in case(正确答案)12、Our teacher was very happy because _______ failed the exam. [单选题] *A. somebodyB. anybodyC. nobody(正确答案)D. everybody13、______ in the library. （）[单选题] *A. Don’t smokingB. No smokeC. No smoking(正确答案)D. Doesn’t smoke14、14．He is cutting the apple ________ a knife. [单选题] *A．inB．toC．with(正确答案)D．by15、My mother and my aunt are both _______. They work in a big supermarket. [单选题] *A. actressesB. doctorsC. salesmenD. saleswomen(正确答案)16、75．As a student in Senior Three, I must work hard．（）, I should take exercise to strengthen my body．[单选题] *A.OtherwiseB.Meanwhile(正确答案)C.ThereforeD.Thus17、The beautiful sweater _______ me 30 dollars. [单选题] *A. spentB. paidC. cost(正确答案)D. took18、You can't see many _____ in a hospital. [单选题] *A. man nurseB. men nurses(正确答案)C. men nurseD. man nurses19、73．（）about the man wearing sunglasses during night that he was determined to follow him．[单选题] *A. So curious the detective wasB.So curious was the detective(正确答案)C.How curious was the detectiveD.How curious the detective was20、Why don’t you _______ the bad habit of smoking. [单选题] *A. apply forB. get rid of(正确答案)C. work asD. graduate from21、4．—Let's fly a kite when you are ________ at the weekend.—Good idea. [单选题] * A．warmB．kindC．smallD．free(正确答案)22、61．How is online shopping changing our way? ? ? ? ? ? life? [单选题] *A．of(正确答案)B．inC．onD．for23、35．___________ good music the teacher is playing! [单选题] *A．What(正确答案)B．HowC．What aD．What the24、I want something to eat. Please give me a _______. [单选题] *A. bookB. watchC. shirtD. cake(正确答案)25、32．Mr. Black is ______ now, so he wants to go to a movie with his son. [单选题] * A．busyB．free(正确答案)C．healthyD．right26、Many people believe that _________one has, _______ one is, but actually it is not true. [单选题] *A. the more money ; the happier(正确答案)B. the more money ; the more happyC. the less money ; the happierD. the less money ; the more happy27、He’s so careless that he always _______ his school things at home. [单选题] *A. forgetsB. leaves(正确答案)C. putsD. buys28、—Why is Mary asking Bob about the school trip? —Because she wants to know ______.（）[单选题] *A. how does he think of the tripB. what does he think of the tripC. what he likes the tripD. how he likes the trip(正确答案)29、_______ win the competition, he practiced a lot. [单选题] *A. BecauseB. In order to(正确答案)C. Thanks toD. In addition to30、We have made a _______ tour plan to Sydney. [单选题] *A. two dayB. two daysC. two-day(正确答案)D. two-days。
全效学习八年级物理上册教参课件自学检测合作探究精讲点拨即时练习43平面镜成像共27张PPT
【自学检测】
阅读课本P79“科学世界”内容。
球面镜分为 和 两种。
凸面镜
凹面镜
一.凸面镜对光线的作用
1．演示实验：平行光入射凸面镜,并根据光的反射定律画出平行光射向凸面镜的光路. 得出结论： 。 2．拿一个凸面镜，观察自己的像,像是放大的还是缩小的？ 3．相同口径的平面镜和凸面镜哪个视野大？ 实验：用两张黑纸各剪去一个等大的圆孔，分别粘在凸面镜和平面镜上，把凸面镜和平面镜放在离学生距离相等的位置上，让学生向两个镜中观察，比较从两个镜中看到的范围的哪个大，哪个小？
P
P′
虚像
还是要有光射入眼睛，是反射光射入眼睛
要看到物体必须有光射入眼睛
没有
不能
光的反射
虚
●例题：照镜子时，平面镜中“人”的大小取决于( ) A.人本身的大小 B.平面镜的大小 C.人到平面镜的距离 D.平面镜放置的高低
分析：我们远离平面镜时感觉自己在镜中的像变小是由于视角变小引起的，平面镜成像的大小只跟物体大小有关，跟平面镜大小，物体到平面镜的距离无关。
像高1.6m,像离镜0.5m，人后退0.5m时,像高不变。像到镜面的距离增加0.5m。
2.出示图片：隧道照明、潜望镜。 讲解：利用平面镜 。 3.总结平面镜的两个作用： （1）利用平面镜 ；（2）利用平面镜 。
改变光路
成像
改变光路
4. 某发光点S发出的两条光线经平面镜反射后分别沿O1A和O2B方向射出，在图中画出发光点S的位置。
O1
A
O2
B
S
二：为什么岸边的树木和房屋等在水中的像看上去都是倒立的？
1.平静的水面可看做一个平面镜，它可以成虚像。
A
全效学习八上数学第十二章全等三角形复习课
证明：在△ABC 和△ABD 中， AD＝BC， ∵∠DAB＝∠CBA， AB＝BA， ∴△ABC≌△BAD(SAS)，∴AC＝BD.
图12－6
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7．[2014· 西宁]课间，小明拿着老师的等腰三角板玩，不小心掉到
两墙之间，如图12－7.求证：△ADC≌△CEB.
图12－3 A．AB＝DE C．EF＝BC B．∠B＝∠E D．EF∥BC
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4．[2014· 长沙]如图12－4，点B，E，C，F在一条直线上， 6 ． AB∥DE，AB＝DE，BE＝CF，AC＝6，则DF＝______
图12－4
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∠CDF， 又∵∠BDE＝∠CDF，∴∠B＝∠C， 即由∠B＝∠C，∠BDE＝∠CDF，BD＝DC，根据ASA证出 △BED≌△CFD，即可得出DE＝DF.
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课件目录 首 页 末 页
6．[2014· 云南]如图12－6，在△ABC和
△ABD中，AC与BD相交于点E，AD＝ BC，∠DAB＝∠CBA.求证：AC＝BD.
∴△ADC≌△CEB(AAS)．
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构造三角形全等证明有关结论
8．已知：如图12－8，AD＝BC，AC＝BD.求证：OD＝OC.
图12－8
第8题答图
【解析】连接AB，由“SSS”判定△ABD≌△BAC，得∠D＝
八下数学全效学习答案
八年级下册数学全效学习题目及答案一、填空（每小题1分，共22分）1、既是24的因数，又是6的倍数的数有（）。
2、在自然数1—10中，（）是偶数但不是合数，（）是奇数但不是质数。
3、250平方米=（）公顷45分 =（）时4、4÷5＝＝＝＝（）填小数。
5、五（1）班有45人，其中男生25人，男生占全班的（），女生占全班的（）。
6、把5米长的绳子平均分成8段，每段长（）米，每段占全长的（）。
7、分母是8的最简真分数有（），它们的和是（）。
8、口袋里有大小相同的8个红球和4个黄球，从中任意摸出1个球，摸出红球的可能性是（），摸出黄球的可能性是（），摸出（）球的可能性最大。
9、在下面的□里填上适当的分数，在上面的□里填上适当的小数。
□ □0 1 □ 2 □ 3二、判断（每小题2分，共10分）1、分数的分子和分母同时乘以或除以一个数，分数大小不变。
（）2、是一个假分数，那么a可能大于b。
（）3、淘气和笑笑分别向希望书库捐了各自图书的15 ，淘气捐的图书多。
（）4、……，第五个点阵中点的个数是1＋4×5＝21。
（）5、把一个长方形拉成一个平行四边形，它的面积不变。
（）三、选择（每小题2分，共12分）1、一个数的最大因数是18，另一个数的最小倍数是24，它们的最大公因数和最小公倍数分别是( )。
A、2，36B、 6，72C、3，482、一个三角形的底不变，如果高扩大4倍，那么它的面积（）A、扩大4倍B、扩大2倍C、无法确定。
3、如图，甲摸到白球得1分，乙摸到黑球得1分，在（）箱中摸最公平。
4、小军从家出发去书店买书，当他走了大约一半路程时。
想起忘了带钱。
于是他回家取钱，然后再去书店，买了几本书后回家。
下面（）幅图比较准确地反映了小军的行为。
A B C5、有5元和10元的人民币共20张，一共是175元，5元的人民币有（）张。
A、5B、10C、156、下列分数中，最接近“1”的是（）。
A、 B、 C、四、计算1、看谁算的又对又快。
人教版八年级语文上册《新闻两则》全效学习参考答案
近年来，通过手机、电子书、网络等工具进行的不完整的、 断断续续的阅读逐渐盛行。不超过140字的微博、手机、平板电 脑等掌上阅读成为时尚，这种阅读方式被称为碎片化阅读。
不少人觉得碎片化阅读是“美丽”的。无论是天文地理还是 娱乐八卦，无论是耳熟能详的经典名作还是冷门生僻的知识， 都可以通过碎片化阅读迅速获取。同时，比起价格不菲的大部 头的纸质书，它的阅读成本更低。
构筑自己的精神家园，否则便是这个世界上无根的流浪儿。要
做到这一点，有效的方法便是深度阅读。
【权威调查】
(引自互联网)
2010年、2011年18—70周岁国民阅读调查摘要
年度
人均纸质 书阅读量
人均电子书 日均纸质书
阅读量阅读时间日来自数字化 阅读时间2010年 4.25本
0.73本
16.78分钟 12.07分钟
(摘自《现代金报》2012年4月22日)
【它山之石】
在加拿大，人们喜欢全家逛书店，喜欢全家出动去图书馆， 喜欢饭后一起围坐在暖烘烘的壁炉前读书。加拿大几乎每座图书 馆都有儿童读书区，家长可以把孩子放在那里，自己放心地去阅 读感兴趣的书籍。喜爱阅读的不仅只有加拿大人，据调查，以色 列人均纸质书年阅读量达到64本，日本为40本，韩国也有11 本。
(1)这首词表明的主题是什么？ 【答案】 要把敌人坚决、彻底、干净地歼灭掉。 (2)“霸王”是指__项羽__，毛泽东在此处有批评之意，
李清照在《绝句》中对他最后失败而不能卷土重来也 表示了惋惜，这两句诗是：__至今思项羽，不肯过江 东__。
5．[2011·衢州改编]请你把以下三则新闻用一句话概 括成一则新闻摘要。
9．阅读【它山之石】，结合前几则材料，说说你获得 的启示。(至少两点)
全效课堂答案
全效课堂答案【篇一：物理全效学习答案】、选择题(本题共12小题，每小题2分，共24分)每小题给出的四个选项中只有一个选项正确，请将正确选项填在答题卡上．１．如图所示的常用工具中，属于费力杠杆的是２．一台电风扇和一个电熨斗，如果使用时电流做功相同，电能转化为内能a．一样多 b．电风扇较多 c．电熨斗较多 d．无法比较３．关于公式，下列说法正确的是a．导体的电阻与导体两端的电压成正比b．导体的电阻与通过导体的电流成反比c．导体的电阻与导体两端的电压成正比，与通过导体的电流成反比 d．导体的电阻与导体两端的电压和通过导体的电流都无关４．当温度降低到一定程度时，某些物质的电阻会变为零，这种现象叫超导．常温超导体的应用有着十分诱人的前景．下面的几个电路元件可用超导体制作的是a．电阻箱的电阻丝 b. 电动机的线圈c．电炉的电热丝 d. 白炽灯泡的灯丝５．下列说法中正确的是a．只要物体吸收了热量，温度就一定升高b．只要物体的内能增加了，就一定是吸收了热量c．只要物体的温度保待不变，就一定没有吸热也没有放热d．物体的温度虽然没有变化，但它的内能有可能增加６．下述各种现象中，属于做功改变内能的是（1）锯条锯木头，锯条发烫（2）擦划火柴，火柴头着火（3）冬天对着手呵气，手变暖（4）电流通过导体，导体会发热 a．(1)（2） b．（2）（3） c．（1）（2）（3）d．（1）（2）（4）７．如图所示是气体酒精浓度测试仪原理图，用于现场测试司机是否酒醉驾车．其中电源电压保持不变，r为定值电阻，r?为二氧化锡半导体型酒精气体传感器，其阻值随气体酒精浓度的增大渐减小．若某次测试中电流表示数较大，则说明a．气体的酒精浓度较大，r?阻值较小b．气体的酒精浓度较大，r?阻值较大c．气体的酒精浓度较小，r?阻筑较小d．气体的酒精浓度较小，r?阻值较大８．家用电吹风由电动机和电热丝等组成．为了保证电吹风的安全使用，要求：电动机不工作时，电热丝不能发热；电热丝不发热时，电动机仍能工作．下图电路中符合要求的是9．一只“10v 5w”的甲灯和一只“6v 1.8w”的乙灯串联接入电路，两灯均能发光，则关于两灯实际亮度的说法正确的是(不计温度对电阻的影响)a．甲灯较亮 b．乙灯较亮c．两灯亮度相同 d．以上三种情况均有可能10．小明利用电能表测量某一家用电器的电功率．当电路中只有这一个用电器连续工作时，测得在1h内消耗的电能为0.8kw?h，那么这一个用电器可能是a．家庭电扇 b．笔记本电脑 c．台灯 d．电饭锅11．如图所示，电源电压保持不变，闭合开关，将滑动变阻器的滑片向右移动．电表的变化情况是a．电压表和电流表示数都变小b．电压表和电流表示数都变大c．电压表示数变大，电流表示数变小d．电压表示数变小，电流表示数变大12．滑轮组在建筑中应用广泛，如图所示为建筑工人自制的滑轮组．某工人用此滑轮组将质量为900n的重物匀速提高5m，所用的拉力是600n（不计滑轮和绳之间的摩擦）．关于滑轮组的说法正确的是a．工人通过滑轮组所做的有用功6000jb．滑轮组的机械效率83.3％c．若匀速提升1500n重物，滑轮组的机械效率75％d．若匀速提升1500n重物，需用拉力为900n二、填空题(本题共10小题，每空1分，共29分)13．如图所示的电路中，电源电压为2v保持不变，a1的示数是▲ a；当开关s闭合时，电流表a2的示数是▲ a．14．唐诗中有“黄河远上白云间”和“不尽长江滚滚来”的诗句,从机械能的角度看,前一句生动形象地表明黄河水存储着大量的▲ 能,后一句表明长江水具有大量的▲ 能．15．如图甲所示装置，在透明塑料盒的底部钻一个孔，把电子式火花发生器的放电针紧紧地塞进孔中，打开塑料盒盖，向盒内滴入数滴酒精，再将盒盖盖紧，然后揿动电火花发生器的按钮，随着“呯”的一声响，看到盒盖向外飞出，在此过程中，酒精燃烧后的燃气的▲能转化为塞子的▲能．图▲中（选填“乙”或“丙”）汽油机的工作过程与这一实验过程中能量的转化是一致的.如果该汽油机飞轮转速是1800r/min，则它每秒钟内对外做功▲次.16．在①人、②大地、③塑料、④金属、⑤油、⑥橡胶、⑦玻璃、⑧陶瓷、⑨盐水等物质中，通常情况下属于导体的是▲（选填序号），导电性能介于导体和绝缘体之间的物体叫做▲.17．在做眼保健操时，各教室的有线扬声器是同时开播，也是同时停播的.它们的连接方式是▲ 联，原因是它们▲ (选填“能”或“不能”)独立工作.18．如图所示，是小敏同学在某次实验探究中连接的电路．开关s2控制的是灯▲，电流表测量的是▲的电流．19．2011年，句容市争创国家级生态城市，全力打造“绿色城市”．如图所示是句容市为迎接国家级生态城市而改造的街道路灯．灯杆顶端是太阳能电池板，是将▲ 能转化为▲ 能的装置，并向灯杆下方的蓄电池充电，供夜晚路灯照明．若在一定时间内，太阳光这些能量经转化后，可供功率为30w的路灯工作70h，则该太阳能路灯的能量转化效率是▲．20．从如图家用电能表的盘面可知，电路中允许接入用电器的最大总功率为▲ w；若某个电热水器单独使用时，转盘在300s内转了210转，则热水器消耗的电能是▲ j，热水器的功率是▲w．21．如图所示为冬天人们常用的一种电热暖手宝，其内部液体通常采用水，这是利用水的▲的属性，使保暖时间更长．当袋内0.5kg 的水由0℃加热至80℃，需要吸收的热量为▲ j，该电热暖手宝正常工作时功率为 600w，不计热量损失，产生这些热量需要的时间为▲ 秒．为了使用时更加安全，它的内部采用了双重温控保护开关，两个温控开(1)当开关s1闭合，s2、s3断开时，电流表的示数为0.6a，(2)当开关s1、s2和s3都闭合时，电流表示数为l.5a，此时通过r1的电流是▲a，10s内电流通过灯泡l做的功为▲j．三、综合应用题(本大题共10小题，共47分)23．（2分）如图所示，当人曲臂将重物端起时, 人的前臂可以看作一个杠杆．请在示意图上画出f1和f2的力臂．24．（2分）在学校传达室安装一个电铃、一个电灯和一个电池组，并在前后门各装一个开关．要求：前门来人按下开关电铃响，后门来人按下开关电灯亮．请设计一个电路，并按设计连接图中对应的实物图．25.（4分）用定值电阻做实验，探究通过导体的电流与导体两端电压的关系．（1）如图甲所示，用笔画线代替导线，将实验电路连接完整，使滑动变阻器接入电路的阻值最大．（2）调节滑动变阻器，把测量的数据填入下表，其中电流表示数为0.5a，时电压表示数如图乙所示，其值为▲ v．此时对应所测电阻实验次数 1 2 3 4 5电压u/v 1.0 1.5 2.0 － 3.0电流i/a 0.2 0.3 0.4 0.5 0.6（3）在丙图中作出通过导体的电流与导体两端电压的关系图线．26.（4分）了解到“重力势能”知识的小东同学，想用身边的器材（铅球），来探究影响重力势能大小的因素，其探究程序如下：(1) 猜想：影响重力势能大小的因素可能有：①重力势能大小可能与物体的质量有关；②重力势能大小可能与物体的高度有关.(2) 实验提供的实心铅球有a球质量2kg、b球质量2kg、c球质量3kg各一个，细沙(足够多)、刻度尺、两个相同大纸盒，请你利用上述器材，帮他设计实验方案、验证猜想、完成实验步骤：a.将适量的沙子放进大纸盒里拨平；b.取球▲ (填球的代号)，将两球分别对准纸盒位置提高到相同高度然后放手，用刻度尺量出铅球所砸沙坑的深度进行比较；c.取球▲ (填球的代号)，将两球分别对准纸盒位置提高到不同高度然后放手，用刻度尺量出铅球所砸沙坑的深度进行比较.(3) 通过对该实验的探究，b步骤得到的结论是：重力势能跟▲ 有关；c步骤得出的结论是：重力势能跟▲ 有关.27.（4分）如图所示是一种自动测定油箱内油面高度的装置．（1）图中虚线框内的装置相当于简单机械中的▲；（2）油量表是用▲表改装的；（3）当油箱中的浮标向上运动时，r的电阻值将▲ ，此时电路中的电流将▲ .(选填“增大”或“减小”)新课标第一网28．（6分)小明在“测滑轮组机械效率”的实验中,用如图甲所示的滑轮组进行了三次实验，实验数据如下表：实验次数物重g/n 物体上升的高度h/cm 测力计的示数f/n 测力计移动的距离s/cm1 6 3 2.5 92 6 5 2.5 173 6 8 2.5 24（1）分析表中数据，回答以下问题：①表中有一个数据的记录是错误的，该错误数据是▲；②第3次实验中滑轮组的机械效率是▲ ；③滑轮组的机械效率与▲ 无关.（2）小红在小明实验的基础上多使用一个滑轮也做了实验，如图乙所示.①小红多使用一个滑轮，目的是为了改变▲ ；②两位同学使用各自的滑轮组提升相同的重物（不计绳重及摩擦），那么所测机械效率是否相同：▲，理由是：▲ .29．（8分)小明按右图所示电路图做“测量灯泡的电功率”的实验．实验室可提供下列器材:a．电流表b．电压表e．电源e(电压4.5v并保持不变）f．开关s及导线若干(1)根据电路图和实验室提供的器材，可判断出：实验时通过灯泡的最小电流为▲ a；加在灯泡两端的最大电压为▲v；(2)若小明所选电压表的量程为0～3v、电流表的量程为0～0.6a，实验要求测量时通过灯泡的电流至少为电流表满刻度的三分之一，则测出的灯泡的功率范围只能是▲(允许最小值)—▲ (允许最大值)；(3)小明按电路图连接好电路后进行实验，由于电路中某一处有故障，当闭合开关时电压表无示数，为查出电路故障，小明进一步观察并检查电路．当检查到电源、开关、电压表、电流表、导线及其连接都完好时，小明结合前面的现察，就可判断出电路的故障：如果小明观察到电流表有示数，则故障是▲ ；如果小明观察到电流表无示数，则故障是▲ ．(4)排除故障后,小明继续进行实验,在对测量数据的记录和处理时,他设计了如下表格．你认为这张表格的设计是▲ (“正确”或“错误”）的理由是▲ ．次数 u/v i/a p/w 平均值p/w12330．（5分）如图所示的滑轮组，小李用750n的拉力将重为1200n的物体在10s内匀速提高2m．（不考虑绳重及摩擦）.求：（1）拉力做的功；（2）拉力做功的功率；（3）滑轮组的机械效率．31.（5分）人类正面临能源危机，为选用节能交通信号灯的灯源，实验室通过实验发现下表中的led灯和白炽灯在正常工作时，光照强度相同有关数据如下表二种灯 led灯白炽灯发光原理二极管发光钨丝高温发光额定电压 24伏 220伏响应时间 10-9秒 10-3秒额定功率 12瓦 100瓦（1）请根据以上材料说明使用led灯的两个优点①▲ ；②▲（2）led灯正常工作时的电流是多少？(3)每天正常工作10小时，使用led灯比使用白炽灯可节约多少电能？（单位可用kw.h）（1）电阻r0在电路中作用：▲ .（2）在托盘中无物体时，使金属滑片p处于r最上端，闭合开关后，电流表读数为多少？（3）该电子秤测量最大质量时电流表的示数是多少？（4）已知该弹簧压缩的长度△l与所受压力f的关系如下表所示．开关s闭合后，当电流表指针指在0.2a处时，托盘中物体的质量为多少？△l/cm 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5【篇二：浙教版科学七年级上册《全效学习》课后练习：第2章答案】1节生物与非生物[学生用书a12]1．所有的生物都具有共同的特征：能呼吸、____、____、对外界刺激有反应、__能遗传和变异__、能进化。
全效学习八上数学专题等腰三角形的角度计算
用了方程的思想．
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如图2，在△ABC中，AB＝AC， CD平分∠ACB，∠A＝36°，则∠BDC的度数
72° ． 为_________
【解析】∵AB＝AC，CD 平分∠ACB， ∠A＝36°， 1 ∴∠B＝∠ACB＝ (180°－∠A)＝72°， 2 1 ∠DCB＝ ∠ACB＝36°. 2 ∴∠BDC＝180°－∠B－∠DCB＝72°. 故答案为 72°.
∵∠DAB＝45°，
∴∠DAC＝∠BAC－∠DAB＝120°－45°＝75°；
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(2)证明：∵∠B＝30°，∠DAB＝45°， ∴∠ADC＝∠B＋∠DAB＝75°， ∴∠DAC＝∠ADC， ∴DC＝AC， ∴DC＝AB.
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∴∠A＝∠AP2P1＝∠AP13P14＝x， ∴∠P2P1P3＝∠P13P14P12＝2x， ∴∠P3P2P4＝∠P12P13P11＝3x， …，
∠P7P6P8＝∠P8P9P7＝7x，
∴∠AP7P8＝7x，∠AP8P7＝7x， 在△AP7P8中，∠A＋∠AP7P8＋∠AP8P7＝180°，
即x＋7x＋7x＝180°，
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如图6，△ABC中，AB＝AC，∠A ＝36°，AC的垂直平分线交AB于E，D为垂足， 连接EC. (1)求∠ECD的度数； (2)若CE＝5，求BC的长． 解：(1)解法一：∵DE垂直平分AC， 图6
∴CE＝AE，∴∠ห้องสมุดไป่ตู้CD＝∠A＝36°.
人教版八年级语文上册《芦花荡》全效学习参考答案
④望着霍夫曼疑惑不解的样子，贝尔蒂挺直胸膛得意地
说：“我们起义了，全城都解放了，现在我要把你押送到战俘 营里，听我的命令，走！”
[2012·青岛]阅读下文，回答问题。 尊严的重量
①这是1944年的8月，德国人占领下的一座法国城市，一名叫
霍夫曼的德国少校正在一家咖啡馆里悠闲地享受着。脑后忽然被 顶上一件冰凉的东西，随即有人大声命令道：“你被俘了，霍夫 曼少校，举起你的手来！” ②霍夫曼大吃一惊，只得举起双手，一任挎在腰间的手枪被抽 走，等转头一看顿时又气又羞，原来刚才顶着自个的并不是枪， 仅仅是一柄铲子，而俘虏他的人竟是贝尔蒂——他的房东。
(25)霍夫曼一下子脸如死灰，无力地问道：“为 什么？你这是为什么？” (26)பைடு நூலகம்尔蒂微笑着说：“因为在我们心目中， 尊严和风度的重量绝不比你们轻，甚至比生命还要 重！” (27)枪响了，贝尔蒂倒了下去。对着这个伟大 的灵魂，霍夫曼缓缓把腰弯了下去。
5．作为叙事类的文章，一般要有“六要素”：时间、地点、人物 及事情的起因、经过、结果。请通读全文，试概括本文记叙的 “六要素”。 时间：1944年8月 地点：__德国人占领下的一座法国城市__ 人物：__霍夫曼__贝尔蒂__迈尔__ 起因：__贝尔蒂俘获霍夫曼。__ 经过：__迈尔羞辱霍夫曼，获救后的霍夫曼决定放过贝尔蒂，报 复迈尔。__ 结果：__贝尔蒂勇敢地站出来，最后被杀害。__
【答案】 示例：反对恐怖主义行为；拒绝战争，反对暴力。
③帝国军队占领巴黎后，霍夫曼就住在贝尔蒂家，作为一 名纯种的日耳曼人，他打心眼里瞧不起贝尔蒂一家，可他并不 像别的德国军人那样飞扬跋扈胡作非为，不，那不是一名受过 良好教育的德国军人的做派。所以他对贝尔蒂一家还算客气， 不过那更是一种骨子里的轻蔑。
全效学习八年级上册英语第二章作文
全效学习八年级上册英语第二章作文全文共6篇示例，供读者参考篇1My Amazing School TripHi friends! I'm so excited to tell you all about the awesome school trip I went on last week. We went to this totally cool science museum and I learned a bunch of fun stuff. I can't wait to share all the details with you!First off, we had to wake up super early to get to school by 7am. I was pretty tired but my mom packed me a big breakfast with scrambled eggs, toast, and apple juice to wake me up. Once we got to school, we all piled onto the big yellow bus. There were kids from 3 different 8th grade classes going on the trip, so the bus was pretty crowded. My best friend Sam managed to save me a seat though, so we got to sit together for the ride.It took us almost an hour to get to the museum. I could hardly contain my excitement when I saw the giant science museum building appearing on the horizon! The outside was all silver metal and shaped like a massive flying saucer. So cool! Wefiled off the bus and our teachers led us through the main entrance.The first exhibit we visited was all about space exploration. There were real rocket ships and satellities on display. We even got to walk through a model of the International Space Station and see what it's like where the astronauts live and work. My favorite part was getting to try on a real spacesuit - it was sooooo heavy and uncomfortable. I don't know how astronauts can stand wearing those for long periods of time.After the space room, we went into an area all about planet Earth. Here we learned about things like tectonic plates, volcanoes, weather systems, and the different layers that make up our world. They had an awesome simulation where we could experience what an earthquake feels like. The ground started shaking like crazy and it was hard to keep my balance! In another section, there were all sorts of interactive games teaching us about tornados, hurricanes, and other extreme weather events. I beat Sam's high score on the hurricane wind simulator - take that!The part I was most looking forward to was the section on the human body. They had this gross but fascinating display of real human organs preserved in glass containers. We got to see aheart, lungs, brain, and all sorts of other organs up close. There was also a larger-than-life model showing all the bones, muscles and other stuff inside our bodies. By pulling on levers, you could remove the skin and even some of the muscle layers to see what's underneath. So weird but awesome!For lunch, we all sat in the museum's cafeteria and ate the bag lunches our parents packed for us. I traded my apple for Sam's bag of chips. After eating, we spent some time in the gift shop. I convinced my mom to buy me a glow-in-the-dark t-shirt with planets and rocket ships on it. She also let me get a super cool magna-tile building set.The last part of our museum tour was the physics and engineering section. This was probably the most boring part for me, but some of the other kids seemed to really love it. We learned about things like levers, pulleys, electrical circuits, and aerodynamics. I struggled to stay awake during the lecture our guide gave on the different types of simple machines. But then we got to go into the interactive inventor's workshop and build our own contraptions, which was way more fun.By the time we finished up at the museum, I was completely tuckered out. I could hardly keep my eyes open on the bus ride back to school. As soon as I got home, I passed out on the couchfor a few hours. That night at dinner, I couldn't stop talking about all the amazing things I saw and did. I kept bugging my parents about when we could go back and visit all the other cool exhibits.This trip gave me such an appreciation for science and how it helps us understand the world around us better. I used to think science was kind of boring, but now I see how exciting and interesting it can be. I'm seriously considering becoming a scientist when I grow up, or maybe even an astronaut! A big thank you to all my teachers for organizing such an awesome educational experience. I'll never forget this amazing school trip!篇2Chapter 2 - A World of WonderWow, you guys! Chapter 2 was totally awesome. I learned so many cool things about the world around us. It was like going on a fun adventure without even leaving my desk!First up, we learned about different landforms. Those are the natural features on the Earth's surface, like mountains, valleys, plains, and plateaus. My favorite landform has to be mountains. Can you imagine climbing up to the peak and seeing everything down below? It would be breathtaking! The book had pictures of massive mountain ranges all over the world. The Himalayas inAsia are the tallest, with Mount Everest reaching a whopping 29,029 feet into the sky. That's like a bazillion times taller than me!We also read about valleys, which are low areas between hills or mountains. Some valleys are so deep and narrow that they're called canyons. The Grand Canyon in Arizona is one famous canyon that was carved out by the Colorado River over millions of years. I would love to go there someday and maybe see a California condor soaring overhead. Those are huge birds with wingspans of up to 10 feet!On the flat side, we learned about plains and plateaus. Plains are super wide areas of flat or rolling terrain. The Great Plains of North America stretch all the way from Canada down to Mexico! Plateaus are also flat on top, but they're raised up high like a gigantic table. The Tibetan Plateau in Asia is often called "the Roof of the World" since it has an average elevation of over 16,000 feet. That's higher than any mountain in the lower 48 United States! I can't even imagine how cold and thin the air must be up there.My favorite part was studying different types of water landforms. Rivers, lakes, gulfs, and bays - they're all found on the maps in our textbooks. A river is a long stream of freshwater thatflows across the land and eventually ends up in an ocean or another body of water. The Nile River in Africa is the longest river on Earth, winding over 4,000 miles! That's farther than from New York to Los Angeles and back again. Just trying to walk that whole distance would take forever.Lakes are bodies of freshwater that are completely surrounded by land. The biggest lake we learned about was the Caspian Sea, which some people think is actually a tiny ocean since it's saltwater! But even if it is a lake, it's still absolutely ginormous, covering over 149,000 square miles. You could fit the entire state of Ohio inside it with room to spare.Gulfs and bays are parts of the ocean that are partially enclosed by land. The Gulf of Mexico has this neat curve shape between the US and Mexico. And the Chesapeake Bay up north has all these little inlets and peninsulas jutting out into the water, which looks super cool on a map.There were some really crazy geological features too. Like sinkholes, which happen when the ground underneath collapses and leaves a big hole behind. Apparently, there's even an entire town in Guatemala that got swallowed up by giant sinkholes! That would be the stuff of nightmares.And get this - there are whole underground cave systems that humans have explored. The Mammoth Cave system in Kentucky has over 400 miles of tunnels and chambers carved out beneath the surface. Just picturing myself deep down in the dark, damp caves gives me the chills! Who knows what creepy crawlies might be lurking down there?Chapter 2 also taught us about awesome natural wonders like the Aurora Borealis, which are colorful lights that dance across the sky near the North Pole. They're caused by particles from the sun interacting with gases in our atmosphere. I've only seen them in pictures and movies so far, but seeing the real thing would be absolutely mind-blowing. A lot of Indigenous cultures have legends about the Northern Lights being the spirits of ancestors or mythical creatures. So cool!By the end of the chapter, my brain was bursting with fascinating facts about the world we live in. Our planet has SO MANY incredible places and phenomena that make me want to jump out of my seat and start exploring right now! From towering mountain peaks to underground labyrinths, it's all out there just waiting to be discovered.This chapter was a great reminder that Earth is an amazingly diverse place full of surprises around every corner. I can't wait tolearn more and maybe even get out and experience some of these natural wonders for myself someday. The world is such an endlessly fascinating place when you stop to really understand it!篇3Learning English Chapter 2: A Thrilling Adventure!Wow, English class has been such a fun adventure this year! Mrs. Smith is the best teacher ever. She always makes learning really exciting and helps us understand everything.In Chapter 2, we learned all about describing different places and cultures around the world. It was like taking an amazing trip without even leaving our classroom! We read cool stories and looked at awesome pictures of far-off lands. We even got to try some yummy new foods from other countries. My favorite was those little dumpling things from China - I forgot what they're called but they were delicious!The first story we read was about this girl named Maya who went on vacation with her family to Egypt. Can you imagine going to see the Great Pyramids?! That would be insane. Maya got to ride a camel and everything! Her trip sounded like such an adventure.After that, we learned how to talk about locations and give directions. Like if someone asked "How do I get to the library from here?" now I know how to explain it properly. We practiced a bunch and even did some fun role-playing activities. Steven and I pretended we were tourists trying to find this mythical "Taco Temple" in Mexico. It was hilarious!Then we moved on to discussing different cultures and traditions around the globe. We watched videos about celebrations like China's New Year festival and Brazil's huge Carnival parade. They seemed so vibrant and exciting! For our group project, my team researched Christmas traditions in Germany. Did you know they have these amazing Christmas markets with decorations, food, and activities everywhere? We made a poster all about it to present to the class.Learning all these new words and phrases about traveling, giving directions, and cultural traditions was pretty tricky at first. But we played some really engaging games that helped us practice in a fun way. Like this one game where we had to give our classmates direction to guide them through an obstacles course while blindfolded. It was chaos...but we were laughing so hard!By the end of the chapter, I felt like I could navigate my way through a foreign city and easily discuss the local culture and customs. Ok, maybe not easily...there's still a lot more for me to learn. But I'm definitely way better at it than before!Overall, this was one of my favorite chapters so far. I know English can seem really hard sometimes, but Mrs. Smith makes it into such a cool adventure. We get to explore the whole world through stories, activities, and projects. Learning about new places and cultures is so fascinating! I can't wait to see what exciting destinations we'll travel to next.Who knows, maybe one day I'll make it to Egypt or China or Germany for real. And thanks to what I've learned, I'll be ready to embrace the adventure! Studying English is opening up both my mind and the entire world to me. How awesome is that?篇4Chapter 2 - Making FriendsHi everyone! It's me again, your friend who loves to learn English. Today I want to tell you all about Chapter 2 from our 8th grade English book. This chapter was super interesting and taught me a lot about making new friends. Get ready for an awesome story time!The chapter started by introducing us to Liu Xing, a Chinese student who just moved to the United States. Liu Xing was really nervous because everything was so new and different. He didn't know anybody and wasn't sure how to make friends. But he really wanted to find some good buddies to hang out with.On Liu Xing's first day at his new school, he met a girl named Amy. Amy seemed really nice and tried to make Liu Xing feel welcome. She showed him around the school and introduced him to some of her friends at lunchtime. Liu Xing was so relieved to meet a friendly face!Even though Amy and her friends were extremely kind, Liu Xing still felt a little shy and out of place at first. It's never easy being the new kid, you know? He had to get used to a different language, different customs, different everything. Sometimes he felt homesick for China.But Liu Xing was determined to overcome his shyness and make some great American friends. The book gave lots of useful tips on how to do this. For example, it said to make an effort to start conversations and ask people questions about themselves. People usually love talking about their interests and hobbies.Another good tip was to join a school club or sports team. That's a fantastic way to meet people who share your passions!Liu Xing decided to sign up for the soccer team since he's an awesome soccer player. His skills helped him make friends with his new teammates.The chapter also talked about the importance of being a good listener when you're trying to make friends. You have to be patient, let the other person speak, and show that you're truly interested in what they have to say. Don't just wait for your turn to talk!As the weeks went by, Liu Xing started feeling more and more comfortable. He made plenty of new friends who accepted him for who he was. He still missed his old life in China sometimes, but he knew he could build an amazing new life for himself in America too.I think the main lesson of this chapter is that even if making friends seems scary and difficult at first, you shouldn't get discouraged. If you just keep putting yourself out there and making an effort, you'll definitely find your crowd. Real friends will appreciate you for your true self.So that's the scoop on Chapter 2, folks! It was packed with lots of friendly advice and wisdom. I'll definitely be using those helpful tips for making new friends myself. Who knows, maybeyou and I will end up being bestie English buddies one day! How cool would that be?Anyhow, I should probably wrap this up now. I've still got tons of homework to do tonight for my other classes. Stupid math...always ruining my fun! But hey, at least I got to recap an awesome chapter about friendship for you all. Until next time, my friends!篇5Learning English is So Cool!Hi friends! I'm super excited to tell you about what I've been learning in English class. We just started Chapter 2 in our textbook and it's all about making friends and being a good friend. I think it's such an important topic because friends are like, the best thing ever!The first unit was called "Making New Friends." It taught us how to introduce ourselves and start conversations. The textbook had lots of really helpful phrases like "My name is..." and "Where are you from?" I practiced with my classmates and it was kind of nerve-wracking at first, but then I remembered that everyone just wants to make new friends.My favorite activity was when we had to mingle around the classroom and meet as many new people as possible in 5 minutes. It was kind of like speed-friending! I met this really nice girl named Emma who just moved here from Canada. We discovered we both love pizza and skateboarding. Instantly, new best friend!The next unit was called "Being a Good Friend." This one was packed with great advice about how to be supportive, loyal, and just an all-around awesome friend. One of the things it taught was using phrases like "I'm here for you" or "You can count on me" to show you care.It also explained the importance of things like keeping secrets, not leaving friends out, and standing up for each other. The textbook had these cool cartoon scenarios where we had to pick the right way to handle tricky friend situations. Like what if your friend copied your homework? Or said something mean about another friend behind their back? Handling that stuff can be so complicated, but the textbook broke it down in a way that made sense.My absolute favorite part was the unit on resolving conflicts. The textbook was full of brilliant tips for working things out when you have a disagreement with a friend. It went over respectfullanguage to use, like "I feel..." instead of "You..." And it showed how a little understanding and compromise can go a long way.There were practice dialogues where you had to negotiate solutions to problems like borrowing something without asking or telling a white lie. I role-played a few of them with my reading buddy and I actually used one in real life when I got into a tiff with my best friend Sam over a game of basketball. Thanks to what I learned, we talked it through and made up in no time!Overall, I've learned so many invaluable lessons about how to make new friends and be a super awesome friend in return. Friendship is one of the most important things in life, and having the skills to create and maintain great friendships is so valuable. This chapter has definitely made me even more excited to put all this into practice!I can already tell it's going to help me make tons of new friends and be the best friend I can be to the great ones I already have. Who knew learning English could be this fun and useful? I'm so lucky my school has such a wonderful English program that teaches us important life skills too. Bring on the next chapter - I'm ready!篇6My Super Fun Time Learning English Chapter 2!Hi everyone! I'm here to tell you all about the awesome English chapter we just learned in class. It's called "A Balanced Life" and it was suuuper interesting and cool. Get ready for some English fun!First up, we learned a bunch of really useful vocabulary words. My favorite was "sedentary" which means someone who sits around a lot and doesn't exercise. I thought that was a funny sounding word! We also covered words like "obesity","well-being", and "engaged". The teacher said these are important words for talking about health and lifestyle.Then we read this really neat article all about how kids these days spend way too much time sitting in front of screens. It said things like video games, TV, phones and tablets are making us unhealthy couch potatoes! The article warned that being sedentary leads to obesity, which is being really overweight. It's bad for your well-being, which basically means your overall health and happiness.The article made me feel kind of bad, because I do play a lot of video games and watch YouTube after school. But it said as long as you also get exercise and aren't just vegging out all day,that's okay. Phew! My mom is pretty good about making me go play outside for Fresh Air Time when I've been inside too long.My favorite part of the whole chapter was the comic strips we read. There was this one comic about a kid named Benny who played video games literally ALL THE TIME. He never went outdoors or ran around, and he got so fat that he got stuck in the doorway! It was pretty funny but also a good lesson on being balanced.Another comic was about these kids who met up at the park to play frisbee and have a picnic. They were engaged, which means actively participating instead of just sitting there spacing out. The kids looked like they were having a total blast running around and tossing the frisbee. It reminded me of times I've gone to the park with my friends to play tag or ride our scooters around. So much fun!For the writing assignment, I had to write a persuasive letter to someone arguing why they should get more exercise and fresh air. I wrote mine to my lazy cousin Jake who literally just lays on the couch gaming all day. I told him he needs to get his move on before he becomes an overweight couch potato!I explained all the benefits of being active, like having more energy, feeling happier from all the endorphin chemicals in yourbrain, and making new friends from team sports. I suggested he could start small by taking walks around the neighborhood after dinner. Or maybe join a rec soccer team to get his exercise while having a blast with other kids.Jake actually texted me back saying my letter motivated him to get off his butt more! He's going to start riding his bike to school and signed up for basketball at the community center. See, a little encouraging from a caring relative can go a long way towards helping someone live a balanced lifestyle full of activities they engage in.Overall, I'd say Chapter 2 was a huge success! I learned lots of new vocabulary, read some hilarious comics, and even helped inspire my cousin. Plus the whole unit drove home why it's so important for kids to balance sitting still with active playtime. Too much of either extreme is unhealthy.From now on, I'll definitely be way more conscious of limiting my screen time and making sure I get outside to run around every day. After all, I want to grow up feeling great about my well-being, not stuck inside as a sedentary lump! Thanks for reading, and let's all strive for balance in our lives. The end!。
上海八年级第一学期全套练习册答案(包括政治历史生命数学)之欧阳语创编
上海八年级第一学期练习册答案(包政治、历史、生命科学及数学）1.政治练习册答案P22.（华东师大版）历史练习册答案P63.生命科学练习册答案P174.数学练习册答案P29《政治》练习册答案第一课公共生活、注意规范一、填空题1. 政治；文化2. 法律3. 内心信念；人与社会4. 助人为乐；爱护公物5. 强制力6. 常务委员会7. 扰乱公共秩序的违法行为8. 电影院、少年宫、博物馆、图书馆、公园……二、选择题AB，ABC，ABC，C， B ，C三、简答题1.良好的秩序是社会公共生活和谐的基础，也是维系社会生活的纽带。
公共秩序关系到人们的生活质量，关系到社会的文明程度，关系到公众的切身利益。
2. 爱护公物；乐于助人；尊老爱幼；孝顺父母；拾金不昧……3. 《中华人民共和国刑法》，制裁严重破坏社会公共秩序的犯罪行为。
《中华人民共和国治安管理处罚法》，制裁扰乱公共秩序的违法行为。
4. （1）A（2）扰乱公共秩序，影响王老师正常的工作生活和消防部门的工作。
（3）B（4）《治安管理处罚法》四、辨一辨1. 不同意维护社会公共秩序，既要依靠道德规范，也需要法律规范的制约。
法律是维护公共秩序的重要手段。
法律是维护公共生活的重要准则，为了维护社会公共秩序，国家制定了众多法律，其中，主要的是《刑法》和《治安管理处罚法》。
在社会生活中，我们要自觉遵守道德规范和法律规范，努力维护社会的公共秩序，做一个具有良好社会公德的、遵纪守法的好公民。
2. 这种看法是错误的。
韩某的做法违反了《治安管理处罚法》，是扰乱公共秩序的行为。
个人爱好不是无条件的，不受任何约束的。
尊重一些个人的爱好，不能牺牲社会或者他人的利益。
韩某的做法会引起众人围观，造成公共秩序混乱，甚至会吸引他人争相效仿，从而严重影响公共秩序和金茂大厦的营业秩序。
因此，韩某的做法应当受到法律相应的惩罚。
第二课生存环境呼吁保护一、填空1.人文2.中国环境保护徽章3.自然资源数量是有限的自然环境容量是有限的4.物质的、非物质5.历史积淀历史和文化6.生存和发展7.法律8.《中华人民共和国环境保护法》、《中华人民共和国文物保护法》二、选择ABC ，ABC，AC ， A ， A ，C。
上海八年级第一学期全套练习册答案(包括政治历史生命数学)
上海八年级第一学期全套练习册答案(包括政治历史生命数学)乱公共秩序的违法行为。
4. （1）A（2）扰乱公共秩序，影响王老师正常的工作生活和消防部门的工作。
（3）B（4）《治安管理处罚法》四、辨一辨1. 不同意维护社会公共秩序，既要依靠道德规范，也需要法律规范的制约。
法律是维护公共秩序的重要手段。
法律是维护公共生活的重要准则，为了维护社会公共秩序，国家制定了众多法律，其中，主要的是《刑法》和《治安管理处罚法》。
在社会生活中，我们要自觉遵守道德规范和法律规范，努力维护社会的公共秩序，做一个具有良好社会公德的、遵纪守法的好公民。
2. 这种看法是错误的。
韩某的做法违反了《治安管理处罚法》，是扰乱公共秩序的行为。
个人爱好不是无条件的，不受任何约束的。
尊重一些个人的爱好，不能牺牲社会或者他人的利益。
韩某的做法会引起众人围观，造成公共秩序混乱，甚至会吸引他人争相效仿，从而严重影响公共秩序和金茂大厦的营业秩序。
因此，韩某的做法应当受到法律相应的惩罚。
第二课生存环境呼吁保护一、填空1.人文2.中国环境保护徽章3.自然资源数量是有限的自然环境容量是有限的4.物质的、非物质5.历史积淀历史和文化6.生存和发展7.法律8.《中华人民共和国环境保护法》、《中华人民共和国文物保护法》二、选择ABC ，ABC ，AC ， A ， A ，C。
三、简答题1.（1）人类的生存与发展离不开自然环境。
人类是在自然长期发展过程中产生的，大自然是我们的生命之源，人们的生存活动依赖于自然。
（2）人文环境反映一定社会的历史、文化和民族的历史积淀，对人的素质的提高起培育熏陶的作用，我们的生活在社会中，离不开人文环境。
2.略3.略4.（1）人类生存不仅离不开自然环境，而且也离不开人文环境。
上海石库门这一人文环境，反映了上海的历史与文化，是一部上海生活史，广大民族的风土人情聚集在这里。
文化遗产是人类文化的重要组成部分，反映了中华民族的历史积淀，是我们民族的骄傲，保护文化遗产，就是传承祖先文化。
上海八年级第一学期全套练习册答案(包括政治历史生命数学)之欧阳体创编
上海八年级第一学期练习册答案(包政治、历史、生命科学及数学）1.政治练习册答案P22.（华东师大版）历史练习册答案P63.生命科学练习册答案P174.数学练习册答案P29《政治》练习册答案第一课公共生活、注意规范一、填空题1. 政治；文化2. 法律3. 内心信念；人与社会4. 助人为乐；爱护公物5. 强制力6. 常务委员会7. 扰乱公共秩序的违法行为8. 电影院、少年宫、博物馆、图书馆、公园……二、选择题AB，ABC，ABC，C， B ，C三、简答题1.良好的秩序是社会公共生活和谐的基础，也是维系社会生活的纽带。
公共秩序关系到人们的生活质量，关系到社会的文明程度，关系到公众的切身利益。
2. 爱护公物；乐于助人；尊老爱幼；孝顺父母；拾金不昧……3. 《中华人民共和国刑法》，制裁严重破坏社会公共秩序的犯罪行为。
《中华人民共和国治安管理处罚法》，制裁扰乱公共秩序的违法行为。
4. （1）A（2）扰乱公共秩序，影响王老师正常的工作生活和消防部门的工作。
（3）B（4）《治安管理处罚法》四、辨一辨1. 不同意维护社会公共秩序，既要依靠道德规范，也需要法律规范的制约。
法律是维护公共秩序的重要手段。
法律是维护公共生活的重要准则，为了维护社会公共秩序，国家制定了众多法律，其中，主要的是《刑法》和《治安管理处罚法》。
在社会生活中，我们要自觉遵守道德规范和法律规范，努力维护社会的公共秩序，做一个具有良好社会公德的、遵纪守法的好公民。
2. 这种看法是错误的。
韩某的做法违反了《治安管理处罚法》，是扰乱公共秩序的行为。
个人爱好不是无条件的，不受任何约束的。
尊重一些个人的爱好，不能牺牲社会或者他人的利益。
韩某的做法会引起众人围观，造成公共秩序混乱，甚至会吸引他人争相效仿，从而严重影响公共秩序和金茂大厦的营业秩序。
因此，韩某的做法应当受到法律相应的惩罚。
第二课生存环境呼吁保护一、填空1.人文2.中国环境保护徽章3.自然资源数量是有限的自然环境容量是有限的4.物质的、非物质5.历史积淀历史和文化6.生存和发展7.法律8.《中华人民共和国环境保护法》、《中华人民共和国文物保护法》二、选择ABC ，ABC，AC ， A ， A ，C。
初二地理全效部分答案
全效答案第10～11课时归类探究1．D 2．C 3．4．C5. ⑪高低从鹿特丹到华沙、赤塔年降水量逐渐减少，从赤塔到呼玛年降水量逐渐增多⑫温带海洋性温带大陆性强6．C 7．B 8．B限时集训1.D2.C 3．C 4.A 5. A 6．C 7．C 8.B 9．B 10.B 11．D 12．A 13.A 14.A 15.B 16.C 17.A 18.A19．A 20. D 【解析】非部北部白色人种为主，中部和南部以黑色人种为主。
21．【答案】⑪略⑫中部高，四周低。
②⑬温带大陆性气候，季风⑭日本处于板块与板块的交界处，多火山多地震，用轻质材料修建房屋主要是为了减少灾害对生命和财产造成的破坏。
⑮黄白⑯ B22. 【答案】⑪北温带因纽特人防寒保暖⑫科迪勒拉大平原南北纵裂⑬温带大陆性气候从太平洋来的湿润气流受到以落基山为主的山脉阻挡，湿润气流仅能影响太平洋沿岸的狭长地带，因此温带海洋性气候局限在太平洋沿岸的狭长地带。
⑭中部大平原对气流的阻挡作用小，寒冷的气流可长驱直入到达墨西哥沿岸。
⑮北美洲山脉大致呈南北走向，西部的山脉对来自太平洋的湿润空气具有阻挡作用，中部的平原对气流的阻挡作用小，北部的寒冷气流能到达墨西哥湾沿岸，南部的暖湿气流能到达北美洲北部。
23．【答案】⑪热北温南温低苏伊士印度洋大西洋几内亚索马里⑫非洲自然资源丰富；非洲民族工业落后非洲经济落后的历时原因是什么？非洲国家发展民族经济提高国民生活水平的途径有哪些？长期的殖民统治；通过引进外来资金、技术、设备和人才达到开发和利用资源，发展民族工业的目的。
⑬东南高、西北低⑭赞同，因为非洲大陆绝大部分位于南北回归线之间的热带地区，赤道穿过其中部，故有“热带大陆”之称赤道穿过非洲中部①处地势高，气温随高度的升高而降低，形成了高山气候⑮ A河与B河相比：流量小；含沙量大；有汛期“单一产品经济”出口初级产品，价格低廉；技术含量低；对国际市场依赖性大⑯人口问题、粮食短缺、环境破坏严重控制人口数量，实行计划生育；引进外资和技术，发展民族经济；提高农业生产技术，保护生态环境24．【答案】⑪太平热南寒巴拿马运河⑫安第斯高原与平原相间分布热带雨林热带草原亚寒带针叶林气候分布的纬度范围是海洋湿热南美洲大部分地区年降水量超过1000毫米，南美洲大部分地区位于热带，年均温超过20℃的地区超过了大部分⑬冬季温和多雨，夏季温暖湿润地中海安第斯山阻挡了从太平洋来的湿润的西风到达山脉的东部，暖湿的西风只能影响到太平洋沿岸狭长地区，山脉的东部为背风坡，降水少⑭气候变暖、水土流失、生态破坏等制定严格的法律法规，保护森林；严禁乱砍滥伐，滥开垦荒地。
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9：突出父亲的话对他的影响力，正是父亲的话督促他在人生的道路上踏实的前行。
10：用同学的堕落来反衬他的坚持原则，清白做人。
11：外面的世界有很多诱惑，而只要心中有原则，保持清白，就能踏实的走好人生之路。
阅读 5：“羡慕”，“嫉妒”的是乡民们从未见过的稀罕物品，那些有出息的出门人;"轻蔑“。”嘲笑“的是乡民们见多了不足为奇的物品，那些没出息的出门人。
6：因为他传递的来自城里的任何消息，都直接关系到家家户户的起落浮沉，会立刻引起震动，所以说，他就是”最敏感的神经末梢“。
7：四乡外出谋生的人，都把自己的血汗和眼泪堆在信客的肩上。信客承担着城乡之间的通讯任务，挑着一副生死祸福的重担，在城市和乡村间来回奔忙。
12：提示：Leabharlann 以写他感到意外，也可以写他感到惋惜，还可以两者兼而有之。
13：示例：司机的行为可以理解，因为当今社会诬陷好人的事情时有发生，司机在保护自己的前提下，依然心存善念救助老人，是值得肯定的。/司机的行为不正确，因为人要常存善念，司机在救助他人之前，不应考虑自己的利益，应以救人为先。
基础就自己做吧 ！