第一篇:2015年高一英語暑假作業答案(合訂本)
2015年高一英語暑假作業答案(合訂本)
從A、B、C、D四個選項中,選出可以填入空白處的最佳選項。
1.I could _______ by the way she walked that her knee was still bothering her.A.separate B.tell C.find D.divide 2.______ in a well-known university is what everybody wishes for.A.Educated B.Being educated C.To educate D.Educating 3.His classmates offered him their congratulations ______ his successful performance.A.at B.on C.for D.of 4._______every member has arrived, lets set about _____ the plan for the next five years.A.Since;to work out B.Because;work out C.Now that;working out D.For;work out 5.Here are the first three books of his poem works, with the fourth one to _____ next month.A.come out B.publish C.replace D.work out 6.As he works in a remote area, he visits his parents only _______.A.anxiously B.occasionally C.urgently D.hopefully 7.His English is improving _______, which makes both his parents and his teacher happy.A.now and then B.little by little C.sooner or later D.one after another 8.It is surprising that such a young boy can swim ______ the river ______ 100 meters wide.A.over;measured B.across;measuring C.across;measures D.through;measuring 9.Li Ming is a student who is easy _____ though he has some trouble _____ his lessons.A.to be got along with;in B.to get along with;with C.to get along;in D.getting along with;with 10.I thought he would offer to pick me up._______, he even refused me when I asked him to do so.A.In other words B.Otherwise C.Whats more D.However 11.It suddenly ________ me how we could improve the situation.A.got B.struck C.beat D.occurred 12.Seeing the ______ sight, the girl was nearly _______ to death.A.terrifying;terrifying B.terrified;terrified C.terrifying;terrified D.terrified;terrifying 13._____ in a heavy snow, he didnt get there in time.A.Catching B.Catch C.Caught D.To catch 14.Dont blame yourself too much.Everyone has his ______ and weaknesses.A.powers B.strengths C.forces D.energies 15.The reason _____ he was late for the meeting was ____ he was held up by traffic jam during rush hours.A.why;because B.that;that C.why;that D.that;because 16.The child ______ in the countryside knows how to _____ animals like dogs, pigs and so on.A.raised;bring up B.brought up;raise C.fed;raise D.fed up;bring up 17.Scientists said that the winter of 2011 was _____ cold, and in fact it was much colder than predicted.A.frozen B.freezing C.freezingly D.froze 18.A local woman didnt _______ her tears when she saw her store destroyed by the fire.A.hold out B.hold back C.hold up D.hold on 19.The fact that she was foreign made ______ difficult for her to get a job in that country.A.this B.that C.her D.it 本文由為您提供供廣大考生參考學習,希望對大家有所幫助,高中頻道推薦。
第二篇:高一 英語暑假作業
Assignments for the Summer Vacation(假期作業)
2011-7
Listening(聽力):
? Studio Classroom(空中英語教室)每天30分鐘
? Movies(電影)(帶英文字幕)
Speaking(口語):
? Selected English Articles for Reading(朗讀文章并錄音)
? Studio Classroom(空中英語教室)
? Texts from our textbooks(課本中的課文)
Reading(閱讀):
? Studio Classroom(空中英語教室)
? 21st Century(21世紀英文報)
? Novels(小說)
Writing(寫作):
?5 essays(5篇作文),包括:book reports(兩篇讀書報告)film reviews(兩篇觀影心得)
A diary or free writing(一篇日記或隨筆)
? Word bank: 2 words/ expressionsa day(25days)(單詞積累;每日兩詞/詞組,共25
天)
? Handwriting(書法練習)
The works to be handed in(需上交的作業)
? The Recording of your reading(文章錄音)
? 5 essays(5篇作文)
? Word bank(單詞積累)
? Handwriting(書法練習)
? Writing portfolio.注意: 以上作業將計入下學期平時成績。
開學考試內容:《空中英語》(50%)、及課本詞匯(30%)、語法(20%)。
第三篇:高一英語暑假作業
高一英語暑假作業
一. 必做題
1.必修四單元形成性測試卷(六套)
2.《雙語報》47期---51期(綜合復習版、快樂閱讀版)
3.自學預習必修五Moduole1(見提綱)
二. 選做題
1.甲+班:21st Century 暑假合刊、《快樂閱讀》
2.甲班:21st Century 暑假合刊(初三版)、《快樂閱讀》
第四篇:2018高一數學暑假作業答案(推薦)
2018高一數學暑假作業答案
:學習應該是一件輕松的活動。學習其實不用刻意去學習,它靠的是日積月累和逐漸的積淀。小編為大家分享高一數學暑假作業答案,希望能幫助同學們復習本門課程!
暑假作業(一)
一.選擇題: D C A
二.填空題: 4.5.6.4.解: ,又,且a、b、c成等比數列,由余弦定理,得。,即。
5.解:。6.解: 由正弦定理及,得,即。,而。
。又,得。,即(當且僅當時=成立)。,即ABC的面積的最大值為。故填。
三.解答題:
7.解:(Ⅰ)由,得,由,得.所以.(Ⅱ)由正弦定理得.所以的面積
.8.解:(Ⅰ)由余弦定理及已知條件得,又因為的面積等于,所以,得.聯立方程組解得,.(Ⅱ)由題意得,即,當時,,,當時,得,由正弦定理得,聯立方程組解得,.所以的面積.9.解:∵sinA+cosA=cos(A-45)=,cos(A-45)=。又0
A=105.tanA=tan(45+60)=.SinA=sin105=sin(45+60)
=sin45cos60+cos45sin60=.S△ABC=ACAbsinA=23=。
解法二:∵sinA+cosA= ①,(sinA+cosA)2=.2sinAcosA=-.∵0
①-②,得cosA=。tanA=。(以下同解法一)
10.解:(1)依題意,,由正弦定理及
(2)由 由(舍去負值)
從而 由余弦定理,得
代入數值,得解得:
暑假作業(二)
一.選擇題: B D B
3.解:在△ABC中,∵a, b, c成等差數列,2b=a+c.又由于B=30,S△ABC=acsinB
=acsin30=.ac=6.b2=a2+c2-2accosB=(a+c)2-2ac-2accosB=4b2-26-26cos30.解得b2=4+2=(1+)2.∵b為三角形的邊,b0.b=1+.應選B.二.填空題: 4.5.6.4.解: ,。
5.解:由題意得:,兩式相減,得.由的面積,得,所以.6.解:由得9+24sin(A+B)+16=37,又
當時,不等于6,故否定,.三.解答題:
7.解: 在△ABP中,APB=30BAP=120,由正弦定理知得.在△BPC中,又PBC=90,可得P、C間距離為(海里)
8.解:(1)由余弦定理,(Ⅱ)由,且得由正弦定理,解得。所以。由倍角公式,且,故.9.解:(Ⅰ)由,且,,又,.(Ⅱ)∵,,又
.10.解:(Ⅰ)由題設及正弦定理,有。故。因為鈍角,所以。由,可得,得。
(Ⅱ)由余弦定理及條件,有,故。由于△面積,又,當時,兩個不等式中等號同時成立,所以△面積的最大值為。暑假作業(三)
一.選擇題: A D D
3.解:不妨設ab,則,另一方面,a為最長邊,b為最短邊。設其夾角為,則由余弦定理可得a2-ab+b2=a2+b2-2abcos,解得cos=,又∵為三角形的內角,=60。故選D。
二.填空題: 4.5.6.6.解:因為銳角△ABC中,A+B+C=,所以cosA=,則,則bc=3。將a=2,cosA=,c=代入余弦定理:中得,解得b=
三.解答題:
7.解:(Ⅰ)由題設及正弦定理,有.故.因為為鈍角,所以.由,可得,得,.(Ⅱ)由余弦定理及條件,有,因,所以.故,當時,等號成立.從而,的最大值為.8.證:(1)∵sin(A+B)= , sin(A-B)=...tanA=2tanB.(2)∵
設AB邊上的高為CD,則AB=AD+DB=,由AB=3,得CD=2+,AB邊上的高等于2+。
9.解: ∵,或,(1)時,;
(2)時。
10.解: ∵A、B、C為△ABC的三內角,,.令,∵A是△ABC的內角 ,當時,為其最大值。此時
暑假作業(四)
一.選擇題: D D A
1.解:由得即,又在△中所以B為或.二.填空題: 4.5.6.4.解:由題意,得為銳角,,由正弦定理得 ,.5.解: ,又, 解得.,是銳角..,,.又,.,.6.解:由余弦定理,由,且得由正弦定理,解得
。所以。由倍角公式,且,故.三.解答題:
7.解:(1)由,得,則有 =,得 即.(2)由,推出而,即得,則有 ,解得.8.解:(Ⅰ)由及正弦定理得,,,是銳角三角形,.(Ⅱ)由面積公式得 由余弦定理得21世紀教
由②變形得.解法二:前同解法1,聯立①、②得,消去b并整理得
解得.所以,故.21世紀教育網
9.解: 由,,,又,由得, 即,,,由正弦定理得.10.解:()∵,=,且,,即,∵,.由的面積,得
由余弦定理得,又,,即有=4.()由()得,則12=, ,∵,,故的取值范圍為.方法二:由正弦定理得,又()得.==,∵,, ,的取值范圍為.暑假作業(五)
一.選擇題: C C A
二.填空題: 4.或 5.63 6.三.解答題:
7.解:設數列{an}的公差為d,首項為a1,由已知得 5a1 + 10d =-5, 10a1 + 45d = 15,解得a1=-3,d=1。Sn = n(-3)+,∵{}是等差數列且首項為=-
3、公差為。
Tn = n(-3)+
8.解:(1)由已知,得.當2時,,所以,由已知,,設等比數列的公比為,由得,所以,所以.(2)設數列的前項和為,則,兩式相減得,所以.9.解:(I)由條件又是公差為1的等差數列,=n2(nN*)。
解法二:由即,又
∵是公差為1的等差數列,即,(II)=(1)n,=12+2232++(1)nn2。
① n是偶數時,=(2212)+(4232)++[n2(n1)2]=;
② n是奇數時。
10.解:(Ⅰ)當時,即是等比數列.(Ⅱ)由(Ⅰ)知,若為等比數列,則有而故,解得,再將代入得成立,所以.暑假作業(六)
一.選擇題: D D D
1.解:設等比數列的公比為,則有。當時,(當且僅當q=1時取等號);當時,(當且僅當q=-1時取等號)。所以的取值范圍是,故選D。
3.解:∵每4個括號有10個數,第104括號中有4個數,第1個為515,和為
515+517+519+521=2072,選D。
二.填空題: 4.5.6.3
4.解:。,將代入成立。
5.解:。
6.解:3 由,可得。
。故填3。
三.解答題:
7.解:(1)an=;(2)an=(-1)n.(3)an=;(4)
(5);(6)an=n+
8.解:∵{an}是等差數列,a2+a4=2a3 ,∵a2+a4=b3,b3=2a3,∵{bn}是等比數列,b2b4=b23 ,∵b2b4=a3 , a3=b23 ,即b3=2b23, ∵b30,b3=,a3=,由a1=1,a3=,公差., 由.當;當.9.解:(Ⅰ)由 得 3anan+1 +an+1 = an ,從而,即,數列是以為首項3為公差的等差數列。
(Ⅱ)設bn = anan+1 ,則 ,,.10.解:(1)由題意,為等差數列,設公差為,由題意得,.(2)若,時。
故。
暑假作業(七)
一.選擇題: B C B
1.解:,當時,有;當,有。綜上,有,選B。
3.解:易知,且。當時,在時0,故選B。二.填空題: 4.14 5.6.;;
三.解答題:
7.解:(1)設數列共2m+1(mN*)把該數列記為{an},依題意a1+a3++a2m+1=44且
a2+a4++a2m=33,即(a2+a2m)=33.(1)(a1+a2m)=44.(2)(1)(2)得.m = 3.代入(1)得a2+a2m = 22,am+1==11 即該數列有7項,中間項為11
方法二: S奇+S偶=Sn;S奇─S偶=a中;Sn=na中 a中=11
(2)(奇數項之和),兩式相除得到:(m+1)/(m─1)=4/3 m=7,再聯立方程組解得:a1=20,am=2d=─3an=─3n+23
8.解:(Ⅰ)∵a3,a5是方程的兩根,且數列的公差d0,a3=5,a5=9,公差 又當n=1時,有b1=S1=1-
當數列{bn}是等比數列,(Ⅱ)由(Ⅰ)知
9.解:(Ⅰ)由,得,兩式相減得,即,又,,, ,數列是首項為,公比為的等比數列 ,.(Ⅱ)由(Ⅰ)知,.(Ⅱ)方法二: 由已知 ① 設,整理得 ②, 由①、②,得.即①等價于,數列是等比數列,首項
為,公比為,.10.解:(1)∵.又.是一個以2為首項,8為公比的等比數列,.(2),.最小正整數.暑假作業(八)
一.選擇題: D B A
二.填空題: 4.-4 5.6.5.解:依題意,而,故,根據等比數列性質
知也成等比數列,且公比為,即,.6.解:,。
三.解答題:
7.解:(1)設{an}的公差為d, {bn}的公比為q,則,解得(舍)或.an=1+(n-1)(-2)=3-2n, bn=(-1)n-1.(2)設Sn=a1b1+a2b2+a3b3++anbn,則Sn=a1-a2+a3-a4++(-1)n-1an,當n為偶數時Sn=(-d)=n;當n為奇數時,Sn=Sn-1+(-1)n-1an=(n-1)+an=2-n.方法二:Sn=a1b1+a2b2+a3b3++anbn,,.將q=-1, bk=(-1)k-1, ak=3-2k,(k=1, 2,,n), d=-2,代入整理可得:Sn=1+(n-1)(-1)n.8.解:(1)由題意知:4(an+1-an)(an-1)+(an-1)2=0,(an-1)(4an+1-3an-1)=0.∵a1=2,an-10,即4an+1=3an+1.假設存在常數C,使{an+C}為等比數列,則:為常數.c=-1,故存在常數c=-1,使{an-1}為等比數列.(2), 從而,.9.解:(Ⅰ)當時,當時,.又滿足,.∵,數列是以5為首項,為公差的等差數列.(Ⅱ)由已知,∵,又,數列是以為首項,為公比的等比數列.數列前項和為.10.解:(Ⅰ)
(Ⅱ)∵
猜想:是公比為的等比數列.證明如下:
∵,是首項為的等比數列.暑假作業(九)
一.選擇題: A C D
二.填空題: 4.7 5.6.1
4.解:據題意,有,故前7項為正數。
5.解:。
三.解答題:
7.解:(1)由已知有,解得,所以。
當時,(2)令,則,當時。。
8.解:設等差數列的公差為,前n項和為,則,是等差數列。
解法二:設的前n項和為,是等差數列。
9.解:(I)設等差數列的公差為d.由即d=1.所以即
(II)∵,10.解:(Ⅰ)由 得
即
∵,解得,(Ⅱ)∵是首項、公比的等比數列,故則數列的前
前兩式相減,得,即
暑假作業(十)
一.選擇題: C A B
二.填空題: 4.5.6.三.解答題:
n項和
7.解:(Ⅰ)由題設
(Ⅱ)若當 故
若當
故對于
8.解:(1)設是公差為d,的公比為q,則依題意有q0且
解之得。
(2)∵,,① ,② ②-①得:.9.解:(1)斜率為1,縱截距為2的直線方程為: 即是以2為公差,2為首項的等差數列,(2),于是,即為遞增數列,的最小項為
10.解:(1)設第一年的森林的木材存量為,第年后的森林的木材存量為,則,,.(2)當時,有得即,.即經過8年后該地區就開始水土流失.暑假作業(十一)
一.選擇題: A C C
二.填空題: 4.512 5.24 6.三.解答題:
7.解:設這四個數為:,則,解得:或,所以所求的四個數為:;或.8.解:(1)當n=1時,當,是以2為公比,4為首項的等比數列。
(2),是以1為首項,1為公差的等差數列。
(3),兩式相減得:。,即的前n項和為:。
9.解:(1)由整理得.又,所以是首項為,公比為的等比數列,得
(2)由(1)可知,故.則
又由(1)知且,故,因此為正整數.10.解:(Ⅰ)=3,=6.由0,0,得03,又,=1,或=2.當=1,02時,共有2個格點;當=2,0時,共有個格點.故.(Ⅱ)由(1)知=,則-=.當3時,.又=9==,所以,故.總結:以上就是高一數學暑假作業答案的全部內容,希望同學們在做題的過程中養成不斷總結的好習慣,考試中避免出現技術性錯誤,在高中取得最好的成績!
第五篇:七年級英語暑假作業答案
七年級英語暑假作業答案 英語練習一
一. CBADC DDCCC CABC無 CDBBC 二. 21.There is, Lucy’s 22.that speaking 23.doesn’t, any 24.with 25.does, look 26.have, time 27.Which girl 28.will visit 29.with 30.What’s
三.31.second 32.to get 33.waiting 34.don’t know, to do 35.is, lying 36.bookshelves 37.to leave 38.to be 四.39.capital 40.above 41.between 42.twentieth 43.dream 44.shower 45.cupboard 46.own 47.million 五.48.shares, with 49.sounds great 50.third 51.call, back 52.would, like, palace 53.wants, next to, hotel 54.climb, ladder, get into 六.CBCCD CACAD 七.ABAAC 英語練習二
一、1.change 2.tastes 3.tired 4.hungry 5.exercise 6.seldom 7.healthy / healthier 8.vegetables 9.important 10.energy
二、1.dancing 2.to cook 13.to be, playing 14.to see 15.feeds 16.bringing 17.to read 18.isn’t 19.healthy 20.is running
三、31—40 BBBAB CBDDD 41—50 BBDAA DCCCB
四、51.Eating, isn’t good for 52.on the Internet 53.sweet snacks any more 54.Good luck with 55.less than
五、EAFDB
六、61—70 DACCD CCCAD
七、CDBC
英語練習三
一.1.western 2.sunny 3.pollution 4.minutes’ 5.less 6.good 7.golden 8.hungry 9.ninth 10.paintings 二.BCBAB CBCDC BDACD BBCAAA 三.32.videos 33.kitchen 34.pollution 35.souvenirs 36.western 37..second 38.wooden 39.tidy 40.hospital 41.underground 四.ACAAC BDACA 五.CBBCA ABDCB 作文范文
My hometown is Danyang.It’s very beautiful and it’s in the east of Jiangsu province.It takes 15 minutes for me to walk to my school.There is not much pollution here because there are not many factories.I hope you can visit here.I will show you around my hometown and my school.英語練習四
一、用所給詞的適當形式填空:
1.quickly 2.friendly 3.surprised 4.across 5.robbers 6.knives 7.Whose 8.turning 9.wooden 10.Suddenly 11will visit 12.are starting ,Shall cook 13.coming, will begin 14.talking 15.to carry 16.caught 17.take 18.playing
二、根據句意及首字母提示完成下列單詞: 19-23 1.through 2.Shall 3.past 4.across 5.traffic
三、選擇題:
24-28 D A D B D ,29-33 C C C D C ,34-38 B D D A B
四、句型轉換: 39.won’t join 40.Take turning right 41.Don’t climb 42.What is do
五、根據漢語提示完成下列句子:
43.how to 44.turn right 45.out of 46.Walk straight on until
六、完型填空: 47-51 C A D D A , 52-57 A B C C B
七、閱讀理解: 57-61 D A A C C
八、書面表達:(略)英語練習五
一.吳老師給七年級一班的同學出了些單項選擇題,你也來做做看好嗎?(15`)1-5 BCDAA 6-10 ABCCD 11-15 DCBCC 二 Millie和Amy正在談話,你能幫助他們完成對話嗎?(5`)1-5 BCDEA IV.Millie正在讀一本舊書,這一頁有幾個字看不清,你能幫她選出來嗎?(10`)1-10 D A B B D D A B C D 三 閱讀理解。(10`)
A.Mr.Wu正在讓七年級一班的學生閱讀一篇關于鴕鳥的文章,你也來試試吧!1-5 C D A B B B.七年級一班的學生正在進行閱讀比賽,你也來試試看吧!1.When it open its tail.2.In the forests of southern Yunnan Province.3.use, to make 4.它繞著它的女友跳舞,好象是說 5.D 四 詞匯(20`)
A.Millie正在做家庭作業她有幾個單詞不會寫,你來幫助她一把吧!1.amazing 2.lightning 3.elephants 4.frightened 5.himself B.Mille不知道該用什么形式的詞來填空,你來幫他一把吧!1.without 2.unusual 3.took 4.careful 5.to do 6.its 7.surprised 8.children’s 9.funny 10.lovely 五.改寫和改錯。(15`)1.have no 2.Is there anything 3.return, to 4.How interesting the 5.is fond of 6.took me, to play 7.belongs to 8.take good care of 9.When do 10.dislikes
英語練習六
一、用所給詞的適當形式填空:
1.ourselves 2.twelfth 3.careless 4.friendly 5.robbers
二、選擇題: B C A B A B C A C B C D B D C
三、動詞填空: 1.sing 2.are climbing 3.won’t come 4.lives 5.to run,caught 6.will find 7.to finish,working 8.to kill
四、完成句子: 1.What fine 2.Shall go 3.long,does, take,to do 4.having a good time 6.the way to,五、完形填空: B A A C C C D D B B
六、閱讀理解: D B B A C A D A D C
七、書面表達:(略)
英語練習七 一.
1.pouring 2.able 3.collecting 4.visitors 5.award 6.organizing 7.result
8.abilities 9.dangerous,safety 10.himself 二. 11.thoughtful 12.matches 13.danger 14.careless 15.helpful 16.friendly 17.our 18.better 19.hearing 20.differences 三.
21.clean up the park 22.put out the fire 23.plant trees 24.be careful with fire 25.rush into the kitchen 26.be in hospital 27.row a boat 28.try our best 29.go skiing 30.no problem 四. 31-35 DCBDC 36-40 CCCCB 41-45 CCACB 46-50 BDCCB 五. 51.5-year-old;lost his way 52.does;hear from 53.hurt;fire 54.belongs to 55.Maybe;will visit 56.was able to 57.by himself 58.Finally;used;to open 59.is good at 60.It’s necessary 61.to save 62.will go 63.finish 64.hurt 65.plan 66.rowing 67.to ride 68.cry 69.looks 70.Is, going to watch 七.
71.What;weather;How /What going 72.It’s;to organize;class activity well 73.on fire;helping;out of 74.tell;to keep away from danger 75.couldn’t;because;forgot to bring 76.use;more often 77.try;best;better results 英語練習八 一.單項選擇。
D B C B A A A B B A A C B B B A C A C C A C C 二.根據首字母、漢字填入適當的詞。Carrots, chasing, weighs, frighten, wings, clean, exercise, tricks, anywhere, pull 三.用所給單詞的適當形式填空。
mice, feeds, Bring, noisy, barks, paws, to learn, twice, fun, slowly, brushes, care, carefully, interested, frightened, hunter, weighed, us, called, speaker 四.用合適的介詞或副詞填空。at, to for, about about, like, of, to, in, of, about 五.改錯,下列各句中均有一處錯誤,找出并訂正。63.C happily 64.D too much 65.B be late 66.D playing 67.D an 68.A noisy 69.B is playing with 70.C eats 71.C needn’t 72.C interested 六.句子改寫。
That dog likes chasing cats.Take good care of your pet.Listen to your teacher.How often should you clean the fish tank? The two bags look the same.七.句子翻譯。
78.Most of the, stay at, by myself 79.is ringing the doorbell 80.to leep healthy, make sure, do exercise 81.am interested in watching 82.are, friend, shouldn’t be afraid / frightened of
英語練習九
一.單項選擇 15% D A B A B D B C C D A B A B B 二.完形填空 10% A C A D C C B C B A 三.閱讀理解 10% B D A B B 四.根據首字母或中文提示完成句子 10% 1.pour 2.collecting 3.memory 4.dangerous 5.wide 6.necessary 7.built, buildings 8.abilities 9.saved 10.geography 五.根據中文完成句子 40% 1.forward to hearing from 2.five-year-old, lost his money, cried 3.to recommend, for, Award 4.leave, on 5.help each other, learn from each other 6.What a brave, How brave 7.to change, once 8.is, trouble 9.Anything, happened to, that 10.leave, alone, too long 六.書面表達(根據提示完成作文)15% 略 英語練習十
一、選擇填空 1-15 BD, CDBAB, BABCD
二、情景交際花16-20 DGCEB
三、完型填空 21-30 CABAD,ABCBD
四、閱讀理解 31-40 CBCAD,CBCDA
五、詞匯 41-50 How much, Are free.am afraid, speak to , have to to bring , take , to go, flying , him
六、短文填詞 51-60 Family, Jean, two, Tom, daughter, mother’s, parents, brother, sister, mother’s