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八年級數(shù)學(xué)20xx年寒假作業(yè)答案(人教版)(文件)

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【正文】 0176。 20 5和根號7 DDBD P20—10有3個,圖略11圖略12 6的平方加8的平方等于100,根號100等于10,10加6等于16,13(1)AC是公共邊,10+14+12=36 P23 BDDBC 抽樣 普查 9 20 2 P24—10(1)程:(98+80+80)/3=86 楊:(95+93+90)/3= 林:(80+100+100)/3= 冠軍林飛,亞軍李揚(yáng),季軍程麗(2)程麗: 林飛:92 冠軍李揚(yáng),亞:林飛,季:程麗平均數(shù) , 穩(wěn)定程度 甲 乙P25 DDD >><>2≤t ≤8 x<2分之1 x大于等于2 k≥4分之30 x小于等于5 m 大于等于9 P2610 6(2x1)24≤4(1+x)12x624≤4+4x 12x30≤4+4x 8x≤34 X≤17/411設(shè)A,B原價分別為a,b,由已知可得b增加10元,A,B新的價格分別為a+10(看成m),b+10(看成n),(1)式各項(xiàng)加上10,即為 b+10n:總資金為x元15%x+10%(x+15%x)〈 30%x700 ++ 〈 x 〉20000 所以當(dāng)商家投入資金大于20000時,可選擇在月末出售,從而使獲利較多 13(1)設(shè)建A花壇x個,B花壇y個,要確保玫瑰花和杜鵑花夠栽,則 50x+ 80y = 1250 ① 100x+90y = 1930 ②解得y=8(個),x= 12(個)P27 CBBCBC a>0 b=0 【3,2】 【100根號5,100】 北偏西,50176。2=55+5+25+7=42平方厘米16 選B位坐標(biāo)點(diǎn),別忘了箭頭,A(1,根號3)B(0,0)C(2,0)—17(2)B(3,3)C39。came 第三和第四道 1:gold ring 2:play any tnstraments 3:of 4:go off 5:in the 20th century 1:wasn39。t know,: too young of to invite to saw What does to do where and when B,B,D,自殺,He found ideas there for his books and stories P43 第一道at the moment from time to time And...pared And...pared On the first day On time get marry depend on 第二道rains possible moved across shoutting cloudy to swim chose 第三道what39。d better to write down your mistakes in notebook Do you think of the movie ? His family took him around Europe Everyone should practise speaking English every day BCABDBCDBA P47:pronounces davice counties musician latest enter lucky health CADCCCADP48 DCDA P48: around the world working to save Parents want him to drop His parents want him to quit school Because of thousands of Please tellwhere is DCDA。t be What must will you what’s baseball cap you must’nP44: You39。t there 3:jack was ranning in the park at this timeyestday 4how many times go shopping with her mother P38: although she was CCACBACCAB P39: proud of 39。t What else What shoud do Where have seen has never visited anyHurry up,the plane is adout to take offWe have to stay here until tomorrow, for tickets have been sold outHe always speak English in classWe should help each other you tell me how to learn English well P34:AABCB P35:1:on business 2:so far 3:now and them 4:space station 5: the same as 6: be different from 7。2=7 55=25 25247。 90176??茖W(xué)網(wǎng)上好像只找到那么點(diǎn) 科學(xué)答案: P49。感時傷別,花也濺淚,鳥亦驚心。使人怵目驚心,令人深感滿目凄然。4注意不能種在莊稼地、缺水的地方,最好種在水庫旁,離水源較遠(yuǎn)處。(4)BCA 2國內(nèi)歷史考試的答案、角度是統(tǒng)一的,是限制思維的,國外的是開放的,有主見的,根據(jù)不同思維有無數(shù)個角度 3 1.②③兩句對第①句進(jìn)行了解說 而且 喜好聲音 有(強(qiáng)烈的)同情心。不盼望可以一躍千里,只希望每天可以行進(jìn)一步。學(xué)習(xí)猶如農(nóng)民耕作,汗水滋養(yǎng)了種子,汗水澆灌了幼苗,沒有人霎時奉送給您一個歉收。(學(xué)問是取之不盡,用之不竭的。春天是個萬物復(fù)蘇的季節(jié),一切都是剛剛醒的樣子,當(dāng)我也獻(xiàn)出一份愛心“我心里的春天”即良知、善良就已經(jīng)喚醒了會像春天的種子一樣在我心中生根發(fā)芽。標(biāo)題中的“最好的教育”是指強(qiáng)的父母對強(qiáng)良好人品的培養(yǎng)。3 會當(dāng)凌絕頂,一覽眾山小斯是陋室,惟吾德馨。(3)先把身上的金屬物品拋開,然后躲進(jìn)大樓內(nèi)。二、結(jié)論一:蘋果的導(dǎo)電性與蘋果的的味道有關(guān),且蘋果越甜,導(dǎo)電性能越強(qiáng)。糖尿病的病人禁食葡萄糖、蔗糖、麥芽糖等純糖食品專題六二、CCDB(1)非條件反射。專題四二、ABCD三、(1)難溶,乳濁。t forget to post 動詞過去式bewascookcookedknowknewswimswangetgotteachtoughtleaveleftfellfeltsmellsmeltdrivedroverunranthinkthoughtkeepkeptbuyboughtbeginbegandodid過去分詞beencookedknownswamgot taught left felt smelt drivenrun thoughtkeptboughtbegandonecostcostcostfindfoundfoundthrowthrewthrowstandstoodstood動詞過去式speakspokeecamegivegavehearheardsendsenthurthurtseesawstealstoletaketooksleepsleptsitsatmeetmetbringbroughtflyflewwakewoke過去分詞spokenegivenheard sent hurtseen stolen taken slept satmet brought flownwakenchoosechosechosenloselostlostreadreadreadriseroserisenwearworewornP50Early to bedGet up early to exercise every dayTo eat less fatty food and more not eat too many sweet can the case of hot weather drink plenty not drink beverages,drink plenty the winter changes according to theright to add their own clothes to not cath a coldThe eyes will not watch TV much,so choosethe appropriate time watching games in not good for mental andphysical,we need to less play科學(xué)選擇題答案:專題一 增大 100% 降水P661.①水果導(dǎo)電性與它的酸性有關(guān)②水果導(dǎo)電性與它本身的質(zhì)量無關(guān) 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。35第四題: +角EBC=90度,角EBC+角CBF=90度所以角ABE=角CBFAB=BC,角ABE=角CBF,BE=BF,三角形ABE全等三角形CBF =50度所以角EBG=90度50度=40度因?yàn)锽E垂直BF,BE=BF所以三角形BEF為等腰三角形即角BEG=45度所以三角形EGC=45度+50度=85度P3乙兩人每時各走x,y千米則由題知可列如下式子:(2+)x+=363x+(3+2)y=36 解得x=6,y= 4.(1)將紙打開,連結(jié)BO。2(1)阡陌:田間小路(2)扶: 沿。 ti225。寒jin(噤)瓦li(礫)箱qie(篋)制cai(裁)荒miu(謬)yao(瘧)子選擇題的是:第三頁三、趣味語文:瞞天過海圍魏救趙偷梁換柱聲東擊西10(1)百 十(2)萬(3)千三(4)八 百 五 十P4選擇題 趁火打劫 以逸待勞第二題P6三 趣味語文 說出來讓大家開心開心 在放棄之前放棄努力四 背誦積累客 親前 后生 死禍 福P7第三單元一 基礎(chǔ)知識cangzi xiaozhou xun zhang榭鏤帷鑿壑倫B Dp8悲忿而蒼涼是的,因?yàn)榍罢叩膽B(tài)度達(dá)觀向上,值得學(xué)習(xí)。10.(1)40 20(2)1050(3)略 ∥n理由如下:因?yàn)?=90 2=90 所以2 所以m∥n 10.(1)①③或②③(2)已知:②③理由如下:因?yàn)锽EO=CDOBOE=CODBE=CD所以△BEO≌△CDO因?yàn)镺BE=OCD BO=CO所以O(shè)BC=OCD所以O(shè)BE+OBC=OCB+OCB即EBC=DCB所以△ABC是等腰三角形 9.(1)14m3(2)7000m3 9.(1)x1(2)x11 10.(1)(3)(5)(6)= 規(guī)律:a+b2ab(a,b為正數(shù)),13,14,15,16,17,18,19,20 1C 。43=27(4)2x1=0(5)a8247。xn=8247。狠2008214 19:56 回復(fù) .* 5樓太強(qiáng)了,就不怕老師發(fā)現(xiàn)?這真的是一個“加速劑”哦(對某些人來說)2008215 15:01 回復(fù) .* 6樓我真的十分感謝,此時心情無法形容,大恩不言謝2008215 16:11 回復(fù)chacouse 3位粉絲 7樓怕什么,反正我上大學(xué)了.2008215 17:46 回復(fù)yang8263011 0位粉絲 8樓(4)350(5)1080 3.解答題(1)∵AD平分∠BAC ∴∠BAD=∠DAC=300 ∵AD=BD ∴∠B=∠BAD=300 ∴∠C=1800∠B∠BAC=750 ∠ADB=∠DAC+∠C=1100(2)∵∠E+∠CDE=∠ACB=600 ∵CD=CE ∴∠CDE=∠E=300 BE=BC+CE=AB+1/2AC=15(3)略此答案由武漢初中科學(xué)網(wǎng)()免費(fèi)提供,嚴(yán)禁其他網(wǎng)站轉(zhuǎn)載第4547頁 1. 選擇題(1)A(2)D(3)D(4)D(5)B 2.填空題(1)2 4(2)((ac)(bc)(3)2x3(4)6m+6n(5)–a+bc(6)4(7)14 3解答題(1)有問題(2)n+4=6 n=2 ∵/m+n/=4 /m
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