八年級寒假作業(yè)及答案,八年級寒假作業(yè)答案

1、1八年級寒假作業(yè)及答案,八年級寒假作業(yè)答案提供的八年級寒假作業(yè)及答案，歡迎閱讀八年級寒假作業(yè)答案第一單元一、基礎(chǔ)知識：1.給下列加點字注音阻遏(e)仄(ze)歪 轉(zhuǎn)彎抹(mo)角(都是第四聲)拂（fu）曉（二聲）贓（zang）物（一聲）悠（you）閑（一聲）22.根據(jù)拼音寫出漢字寒jin（噤）瓦li（礫）箱qie（篋）制cai（裁）荒miu（謬） yao（瘧）子選擇題的答案是：3.C 4.B 5.B第三頁三、趣味語文：瞞天過海 圍魏救趙 偷梁換柱 以逸待勞 趁火3.c3打劫 聲東擊西10(1)百 十(2)萬(3)千 三(4)八 百 五 十P4選擇題P644.D5.B第二題渴慕.震悚.霹靂狼籍.

2、滯笨.唏噓.煩躁.吊唁.呵斥5三 趣味語文1說出來讓大家開心開心2在放棄之前放棄努力四 背誦積累客親前后生死p86禍福P7第三單元一 基礎(chǔ)知識cang zi xiaozhou xun zhang榭鏤帷鑿壑倫75.輕捷與瀟灑 悲忿而蒼涼是的，因為前者的態(tài)度達(dá)觀向上，值得學(xué)習(xí)6.中國石拱橋的語言精煉、準(zhǔn)確;本文語言典雅、舒和P9三 趣味語文四 背誦積累陋室 黃鶴樓 岳陽樓 承天寺8P10第四單元ni xi lan bo yin yan咎綺藩褶衍翩改錯兩棲(qi)殷(yan)紅P116.仿生手生動形象地寫出仿生手的神奇，吸引讀者7.不可以，這個詞表示時間范圍，若刪去，則句子意思變?yōu)槿?何時候都會做腳

3、， 與現(xiàn)實不相符合， 這個詞體現(xiàn)了說明文語言的準(zhǔn)確 性。98.列數(shù)字 科學(xué)準(zhǔn)確的說明了我國肢體殘疾的人數(shù)之多，突出了 仿生手的作用之大P1210.二 三 四 五11.(1)落暉(2)落日(3)夕日(4)日暮(5)落日(6)夕陽(7)斜p13語文第五單元1.yan xi ti o y zhu n d2(1)阡陌:田間小路(2)扶:沿;順著10(3)規(guī):計劃(4)津:渡口(5)屬:類(6)蕃:多(7)馨:香氣,這里指品格高尚(8)鴻儒：博學(xué)的人(9)宜:應(yīng)當(dāng)(10)因:順著、就著p15(1)田家(2)渝州(3)江南(4)東城P161.s tuan geqi x ish112.(1)奔:飛奔的吧(2

4、)屬:動詞,連接(3)歇:消散(4)頹:墜落(5)但:只(6)僅:幾乎(7)沃:用水林洗(7)強(qiáng):盡力11.(1)元旦(2)春節(jié)(3)元宵(4)兒童12(1)到(3)雁(4)和(5)燕12數(shù)學(xué)答案：勾股數(shù)(1)1.C 2.D 3.60/13cm 4.13 5.連接B、D，36cm26.C勾股數(shù)(2)1.C 2.B 3.A 4.130 5.24實數(shù)1.A 2.C133.正負(fù)根號5 4.2倍根號2 5.05.16.(1)2倍根號2(2)根號3(3)14+4倍根號3(4)6P22平移與旋轉(zhuǎn)14：AB7.5 60P236.(2)解：正ABCAB=BC又T/ABD由AABC旋轉(zhuǎn)ABD望zABC15AB=

5、BC=AD=DC四邊形ABCD為菱形P28一次函數(shù)(1)1.2.3.DAC4.(1)(2)(5)(6) (2)5.(3分之2，0)(-3,0)增大 面積不知道對不對6.(0,6)16P287 (2) X：(-1.5,0)Y：(0,2)(3) 2.5(4)1.5(5)X為負(fù)數(shù)時Y大于0 X為整數(shù)或0時，Y小于0P2917一次函數(shù)(2)3 -34 1.2.35 Y=2x+66甲跑的快181.5秒/米7 10元1.2元/千克50千克P30195. 0/06 (3,2)7拉伸P31204 X=0.5 Y=-1X=-3 Y=05 X=800 Y=50032頁BC 2未知數(shù)-2 3?P331.C 2.B

6、3.A4. 66 5. 28216. 75 10-80 9=30分33頁DBA 18 24.534頁CDAB 6035第四題:1.因為角ABE+角EBC=90度角EBC+角CBF=90度所以角ABE=角CBF22AB=BC,角ABE二二角CBF,BE二二BF,三角形ABE全等三角形CBF2.因為角ABE=50度所以角EBG=90度-50度=40度因為BE垂直BF,BE=BF所以三角形BEF為等腰三角形23即角BEG=45度x=6,y=3.64.(1)24所以三角形EGC=45度+50度=85度P363.設(shè)甲、乙兩人每時各走x,y千米則由題知可列如下式子：(2+2.5)x+2.5y=363x+(

7、3+2)y=36解得將紙打開，連結(jié)BO根據(jù)題意，則DE垂直平分BOX=525所以，DB=DO設(shè)OD=x,則DB=x，AD=8-x因為OABC是矩形，所以4（平方）+（8-X）（平方）=X（平方）*（平方）就是那個小226所以O(shè)D=5(2)菱形證：因為角DBO=角BOE又，DE垂直平分BO所以DB=OE=OD=5E(5.0)27所以是菱形(3)設(shè)F(m,n)則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)28帶入方程y=ax+b0=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-三分之二十英語：2930P37

8、happy1 what a melody（悅耳） song it is!what a fast boy he is !what a heavy girl she is !what a beautiful school it is !31what a good boy he is !what a beatific（幸福）boy he is!is cleanedwere takenis makenwas showed32are invitenwasnt gavewas slolen ; was foundturtletigerjapan33Mexico tiger sierra leoneP39.

9、一:better best havier heaviset more most older oldest bigger biggestmore expensive most expensive more smart most smart betterknown best knownmore badly most badly less leas more carefully most carefullyfewer fewest more slowy most slowy thinner thinnest more healthymost healthy more easily most easi

10、ly hotter hoyyest ofteneroftenest farer farest larger largestP40一：plan to do計劃做某事He planned on taking his vacationin 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.34refuse to do拒絕做某事She asked him for a loan, but he refused.finish doing完成某事（后面就不打某事.到時記得自

11、己加上哈）Have you finished reading that magazine?enjoy dong擅長 .I enjoyed reading these books verymuch.practise doing練習(xí).I practise my swing.suggest doing建議.I suggest our going to the park on Sundayadmit doing.承認(rèn). I admitted breaking the window.deny doing否認(rèn).He denied having seen these watches before.35arr

12、ange for安排.I ve arranged for a taxi.offer to do提供They offered to help melike+doing喜歡. She likes playing the piano36hate to do遺憾.He hated to have quarrelled with her.hate to do討厭He hated to have quarrelled with her.remember to do記住去做某事Do you remember telephonenumber?remember doing記得做過某事I remember tel

13、ling about itonce.forget to do忘記去做某事I forgot posting the letter.forget doing忘記做過某事Dont forget to post the letter.heryou37p43動詞 過去式 過去分詞be was beencook cooked cookedknow knew knownswim swan swamget got gotteach tought taught38leave left leftfell felt feltsmell smelt smeltdrive drove drivenrun ran run

14、think thought thoughtkeep kept kept39buy bought boughtbegin began begando did donecost cost costfind found foundthrow threw throwstand stood stood40動詞 過去式 過去分詞speak spoke spokencome came comegive gave givenhear heard heardsend sent senthurt hurt hurtsee saw seen41steal stole stolentake took takensle

15、ep slept sleptsit sat satmeet met metbring brought broughtfly flew flown42wake woke wakenchoose chose chosenlose lost lostread read readrise rose risenwear wore wornP5043Early to bedGet up early to exercise every dayTo eat less fatty food and more milk.Do not eat too many sweet can cause obesity.In

16、the case of hot weather drink plenty of water.Can not drink beverages,drink plenty of water.In the winter changes according to the right to add their ownclothes to not cath a coldThe eyes will not watch TV much,so choose the appropriate timewatching TV.44Playing games in not good for mental and phys

17、ical,we need to lessplay科學(xué)選擇題答案：專題一1. ACBD增大100%降水P661.水果導(dǎo)電性與它的酸性有關(guān) 水果導(dǎo)電性與它本身的 質(zhì)量無關(guān)2.乙 避雷針 躲入建筑物內(nèi)或就地蹲下專題二P55壓力不變時，受力面積減小，壓強(qiáng)增大45BBCCBD受力面積 壓強(qiáng)490增大 水的密度不變時，越深，水內(nèi)部壓 強(qiáng)越大P571.B 2.A A暖40高壓 冷鋒 晴朗干燥 甲乙A專題三、1、B 2、(1)A (2)A(3)平流，50%-60%3、(1)高壓系統(tǒng)，冷鋒系統(tǒng)，晴朗(2)江蘇46專題四1、A 2、B 3、C 4、D三、(1)難溶，乳濁(2)會使魚類大量死亡，破壞生態(tài)平衡。專題五一、略47、1、C 2、B 3、C 4、C 5、D專題六1、C 2、B 3、C 4、C 5、DP62四、糖尿病飲食包括主食：如粳米、富強(qiáng)粉;含熱能低的食 物如：青菜、白菜、黃瓜、