八年级寒假作业及答案

八年级寒假作业及答案 下面是出guo提供的八年级寒假作业及答案，欢迎阅读。 一、基础知识： 1.给下列加点字注音。 阻遏(e) 仄(ze)歪 转弯抹(mo)角 (都是第四声) 拂(fu)晓(二声) 赃(zang)物(一声) 悠(you)闲(一声) 2.根据拼音写出汉字。 寒 * (噤) 瓦li(砾) 箱qie(箧) 制cai(裁) 荒miu(谬) yao(疟)子 选择题的答案是： 3.C 4.B 5.B 三、趣味语文：瞒天过海 围魏救赵 偷梁换柱 以逸待劳 趁火打劫 声东击西 10(1)百 十 (2)万 (3)千 三 (4)八 百 五 十 选择题 3.c 4.D 5.B 第二题 渴慕.震悚.霹雳 狼籍.滞笨.唏嘘. 烦躁.吊唁.呵斥 三 趣味语文 1 说出来让大家开心开心 2 在放弃之前放弃努力 四 背诵积累 客 亲 前 后 生 死 祸 福 一 基础知识 cang zi xiao zhou xun zhang 榭 镂 帷 凿 壑 伦 B D 5.轻捷与潇洒 悲忿而苍凉 是的，因为前者的态度达观向上，值得学习。 6.中国石拱桥的语言精炼、准确;本文语言典雅、舒和。 三 趣味语文 B C D A 四 背诵积累 陋室 黄鹤楼 岳阳楼 承天寺 ni xi lan bo yin yan 咎 绮 藩 褶 衍 翩 改错 ;两栖(qi) 殷(yan)红 A C D 6.仿生手 生动形象地写出仿生手的神奇，吸引读者 7.不可以，这个词表示时间范围，若删去，则句子意思变为任何时候都会做脚，与现实不相符合，这个词体现了说明文语言的准确性。 8.列数字 科学准确的说明了我国肢体残疾的人数之多，突出了仿生手的作用之大 10.二 三 四 五 11.(1)落晖 (2)落日 (3)夕日 (4)日暮 (5)落日 (6)夕阳 (7)斜阳 1. yn xi tio y zhun d 2(1)阡陌:田间小路 (2)扶: 沿;顺着 (3)规:计划 (4)津:渡口 (5)属:类 (6)蕃:多 (7)馨:香气,这里指品格高尚 (8)鸿儒：博学的人 (9)宜:应当 (10)因:顺着、就着 (1)田家 (2)渝州 (3)江南 (4)东城 1.s tun g qix sh 2.(1)奔: 飞奔的吧 (2)属: 动词,连接 (3)歇: 消散 (4)颓: 坠落 (5)但: 只 (6)仅: 几乎 (7)沃: 用水林洗 (7)强: 尽力 11. (1)元旦 (2)春节 (3)元宵 (4)儿童 12 (1)到(3) 雁 (4)和(5) 燕 勾股数(1) 1.C 2.D 3.60/13cm 4.13 5. 连接B、D，36cm2 6.C 勾股数(2) 1.C 2.B 3.A 4.130 5.24 实数 1.A 2.C 3.正负根号5 4.2倍根号2 5.0 5.1 6.(1)2倍根号2 (2)根号3 (3)14+4倍根号3 (4)6 一：AB 二：7.5 60 6.(2)解：正ABC AB=BC 又ABD由ABC旋转 ABDABC AB=BC=AD=DC 四边形ABCD为菱形 一次函数(1) 1.2.3.DAC 4.(1)(2)(5)(6) (2) 5.(3分之2，0)(-3,0) 增大 面积不知道对不对 6.(0,6) 7 (2) X：(-1.5,0) Y：(0,2) (3) 2.5 (4)1.5 (5)X为负数时 Y大于0 X为整数或0时， Y小于0 一次函数(2) 1 A 2 D 3 -3 4 1.2.3 5 Y=2x+6 6 甲跑的快 1.5秒/米 7 10元 1.2元/千克 50千克 1 A 2 B 3 B 4 C 5. 0/0 6 (3,2) 7 拉伸 8 4 1 D 2 B 3 C 4 X=0.5 Y=-1 X=-3 Y=0 5 X=800 Y=500 32页 BC 2 数 -2 3 1.C 2.B 3.A 4. 66 5. 28 6. 7510-809=30分 33页 DBA 18 24.5 34页 CDAB 60 35第四题: 1. 因为角ABE+角EBC=90度,角EBC+角CBF=90度 所以角ABE=角CBF AB=BC,角ABE=角CBF,BE=BF,三角形ABE全等三角形CBF 2. 因为角ABE=50度 所以角EBG=90度-50度=40度 因为BE垂直BF,BE=BF 所以三角形BEF为等腰三角形 即角BEG=45度 所以三角形EGC=45度+50度=85度 3.设甲、乙两人每时各走x,y千米则由题知可列如下式子： (2+2.5)x+2.5y=36 3x+(3+2)y=36 解得 x=6,y=3.6 4.(1) 将纸打开，连结BO。 根据题意，则DE垂直平分BO 所以，DB=DO 设OD=x,则DB=x，AD=8-x 因为OABC是矩形，所以 4(平方)+(8-X)(平方)=X(平方) *(平方)就是那个小2 X=5 所以OD=5 (2) 菱形 证： 因为角DBO=角BOE 又，DE垂直平分BO 所以DB=OE=OD=5 所以是菱形 (3) 设F(m,n) 则m(平方)+n(平方)=4(平方) (5-m)(平方)+n(平方)=3(平方) 解得F(3.2,-2.4) E(5.0) 带入方程y=ax+b 0=5a+b -2.4=3.2a+b 解得 a=三分之四 b=-三分之二十 y=三分之四x-三分之二十 英语： happy1 一 what a melody(悦耳) song it is! what a fast boy he is ! what a heavy girl she is ! what a beautiful school it is ! what a good boy he is ! what a beatific(幸福) boy he is! 二 is cleaned were taken is maken was showed are inviten wasnt gave was slolen ; was found 三 turtle tiger japan Mexico tiger sierra leone better best havier heaviset more most older oldest bigger biggest more expensive most expensive more smart most smart better known best known more badly most badly less leas more carefully most carefully fewer fewest more slowy most slowy thinner thinnest more healthy most healthy more easily most easily hotter hoyyest oftener oftenest farer farest larger largest plan to do 计划做某事 He planned on taking his vacation in July. hope to do 希望做某事 We hope to see you soon. agree to do 同意做某事 No results found for agree to do. refuse to do 拒绝做某事 She asked him for a loan, but he refused. finish doing 完成某事(后面就不打某事.到时记得自己加上哈)Have you finished reading that magazine? enjoy dong 擅长.I enjoyed reading these books very much. practise doing 练习.I practise my swing. suggest doing 建议.I suggest our going to the park on Sunday admit doing.承认. I admitted breaking the window. deny doing否认.He denied having seen these watches before. arrange for 安排.Ive arranged for a taxi. offer to do 提供They offered to help me like+doing喜欢. She likes playing the piano hate to do 遗憾.He hated to have quarrelled with her. hate to do 讨厌 He hated to have quarrelled with her. remember to do 记住去做某事 Do you remember her telephone number? remember doing 记得做过某事 I remember telling you about it once. forget to do 忘记去做某事 I forgot posting the letter. forget doing 忘记做过某事 Dont forget to post the letter. 动词 过去式 过去分词 be was been cook cooked cooked know knew known swim swan swam get got got teach tought taught leave left left fell felt felt smell smelt smelt drive drove driven run ran run think thought thought keep kept kept buy bought bought begin began began do did done cost cost cost find found found throw threw throw stand stood stood 动词 过去式 过去分词 speak spoke spoken e came e give gave given hear heard heard send sent sent hurt hurt hurt see saw seen steal stole stolen take took taken sleep slept slept sit sat sat meet met met bring brought brought fly flew flown wake woke waken choose chose chosen lose lost lost read read read rise rose risen wear wore worn Early to bed Get up early to exercise every day To eat less fatty food and more milk. Do not eat too many sweet can cause obesity. In the case of hot weather drink plenty of water. Can not drink beverages,drink plenty of water. In the winter changes aording to the right to add their own clothes to not cath a cold The eyes will not watch TV much,so choose the appropriate time watching TV. Playing games in not good for mental and physical,we need to less play 1. ACBD 增大 100% 降水 P661.水果导电性与它的酸性有关 水果导电性与它本身的质量无关 2. 乙 避雷针 躲入建筑物内或就地蹲下 P55 压力不变时，受力面积减小，压强增大。 BBCCBD 受力面积 压强 490 增大 水的密度不变时，越深，水内部压强越大 P57 1.B 2.A A 暖 40 高压 冷锋 晴朗干燥 甲乙 A 二、1、B 2、(1)A (2)A(3)平流，50%-60%。 3、(1)高压系统，冷锋系统，晴朗。 (2)江苏。 二、 1、A 2、B 3、C 4、D 三、 (1)难溶，乳浊。 (2)会使鱼类大量死亡，破坏生态平衡。 一、略。 二、1、C 2、B 3、C 4、C 5、D 1、C 2、B 3、C 4、C 5、D P62 四、糖尿病饮食包括主食：如粳米、富强粉;含热能低的食物如：青菜、白菜、黄瓜、冬瓜、番茄、豆腐、黄豆芽等;还有少量的瘦猪肉、鸡蛋。糖尿病的病人禁食葡萄糖、蔗糖、麦芽糖等纯糖食品 二、1、C 2、C 3、D 4、B 5、(1)非条件反射。 (2)无效。 (3)条件。 二、1、D 2、D P66 1.水果导电性与它的酸性有关 水果导电性与它本身的质量无关 2. 乙 避雷针 躲入建筑物内或就地蹲下 一、略。 二、1、结论一：苹果的导电性与苹果的的味道有关，