八年级英语下册unit8saveourworldlesson45letssortgarbage教案新版冀教版90Word文件下载.docx
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Canyounamethem?
Whatcanberecycled?
Askthestudentstohaveadiscussionaboutthekindofrubbishandatthesametimenewwordscanbetaughtbytalkingaboutsomegivenpictures.
Step2.Playtheaudiotape.Askthestudentstolistentothetapewhilethinkingaboutthequestion:
Whatmakesthemostgarbage?
Step3.ImmersionReading:
1.HavethestudentsreadthedialoguequicklyandfinishEx.2intheactivitybook.
2.Readthedialoguecarefullyagainandhaveafurtherstudyaboutit.Encouragethestudentstosolvetheirproblemsinthereadingbyco-operativelearning.
Step5.FocusExplanationandPractice:
Inordertohelpthestudentsunderstandthedialoguecorrectlyandmasterthemasterycontents,accordingtotheirstudy,I’llexplainandpracticesomeofthefollowinglanguagepoints:
1.Jennyhasemptiedtwobagsofgarbageontothefloor.
empty可作形容词或动词,意思是“空的;
倒空”。
E.g.Thereisanemptybottleonthetable.
Canyouemptytheplatesforme?
2.CanIhelpyousortit?
提供帮助常用句式:
CanIhelpyou?
/WhatcanIdoforyou?
答语:
Yes,please./No,thanks.
sort可作名词或动词,意思是“类;
分类”。
E.g.Whatsortofpeoplearethey?
Wemustsortoutthebadapplesfromthegood.
3.That’severythingthatisn’tglass,metal,plasticorpaper.Thatisn’tglass,metal,plasticorpaper是定语从句,用来修饰先行词everything,关系代词只能用that,不能用which.
4.Goodheavens!
Somuchgarbage!
goodheavens意思是“天哪”,表示惊讶、不相信等。
5.That’sthesameweightasasmallcar!
thesame…as意思是“和……一样”。
same前必须加the。
Forexample:
Theyhavethesamepopulation(人口)aswedo.
反义词组为:
bedifferentfrom/than/to…“与……不同”。
Step6.Playtheaudiotape.Askthestudentstolistenandrepeat,thenactoutthedialogueingroupsofthree.
ClassActivity:
Cometo“UnitProject”.[中小学教育教学资料]
1.Askthestudentstoreadthestructionsoftheprojectwithsomequestions,suchas:
Whatdidthisprojectaskyoutodofirst?
Why?
Helpthemmakeclearthespecificrequirements,goalsandexpectantresultoftheproject.[中小学教育教学资料]
2.Collectthegarbagewhichthestudentshavepickedupintheschoolyardandtheirneighbourhood.
3.Dividetheclassintosmallgroups.Provideeachgroupwithfiveemptybagsandsomeofthegarbagethathasbeencollected.Askstudentstosortthegarbageintoseparatebags--paper,plastic,metal,glassandothers.RequirethemtousetheirEnglishvocabulary.[中小学教育教学资料]
4.Comparenumbersofthegarbagewhichthey’vesorted.
5.Havestudentsworkinthesamegroupsorinnewgroups.Eachgroupwilldiscussandmakeaposteraboutwhatthingstheycandotohelpreducepollutionintheworld.
Iftheprojectcannotbefinishedinonelesson,itcanbecontinuedinthenextlesson.[中小学教育教学资料]
略。
专题提升四 一元一次方程的易错点及应用
解一元一次方程的易错点
易错点1 移项不变号导致错误
1.解方程:
9-2x=7-5x.
易错点2 去括号漏乘导致错误
2.解方程:
3x-7(x-1)=3-2(x+3).
易错点3 去分母漏乘导致错误
3.解方程:
x-=-1.
易错点4 分母小数化整数多乘导致错误
4.解方程:
-=1.
一元一次方程的应用
5.有一包糖果,分给幼儿园某班的小朋友,如果每个小朋友分到6颗,则恰好有一个小朋友没有分到糖果;
如果每个小朋友分到5颗,则多出5颗.那么这个班有小朋友的人数为( )
A.8人B.10人C.11人D.22人
6.(杭州中考)林地108公顷,旱地54公顷,为保护环境,需把一部分旱地改造为林地,使旱地占林地面积的20%,设把x公顷旱地改为林地,则可列方程( )
A.54-x=20%×
108
B.54-x=20%×
(108+x)
C.54+x=20%×
162
D.108-x=20%(54+x)
7.某品牌自行车1月份的销售量为100辆,每辆车的售价相同.2月份的销售量比1月份增加了10%,每辆车的售价比1月份降低了80元.2月份与1月份的销售总额相同,则1月份的售价为____________元.
8.为迎接国庆节的到来,某市准备用灯饰美化红旗路,采用A,B两种不同类型的灯笼200个,且B灯笼的个数是A灯笼的.
(1)A,B两种灯笼各需多少个?
(2)已知A,B两种灯笼的单价分别为40元和60元,则这次美化工程购置灯笼需多少费用?
9.一个三位数,三个数字之和是24,十位数字比百位数字少2.如果这个三位数减去一个两位数所得的数也是三位数,其中这个两位数两个数字与百位数字相同,而得到的这个三位数三个数字的顺序和原来三位数的数字的顺序颠倒,求原来的三位数.
利用一元一次方程解决方案决策问题
10.椰岛文具店的某种毛笔每支售价25元,书法练习本每本售价5元.该店为了促销该种毛笔和书法练习本,制定了两种优惠方案.方案1:
买一支毛笔赠送一本书法练习本;
方案2:
按购买金额九折付款.某校欲为校书法兴趣小组购买这种毛笔10支,书法练习本x(x>
10)本.
(1)请你用含x的式子表示每种优惠方案的付款金额;
(2)购买多少本书法练习本时,两种优惠方案的付款金额一样多.
11.已知某电脑公司有A,B,C三种型号的电脑,其价格分别为A型每台6000元,B型每台4000元,C型每台2500元.某中学计划将100500元钱全部用于从该电脑公司购进其中两种不同型号的电脑共36台.请你设计出几种不同的购买方案供该校选择,并说明理由.
参考答案
1.x=- 2.x=5 3.x=-
4.x=- 5.C 6.B 7.880
8.
(1)A灯笼120个,B灯笼80个;
(2)120×
40+80×
60=9600元.
9.设百位数字为x,则十位数字为(x-2),个位数字为24-x-(x-2)=26-2x,根据题意,得[100x+10(x-2)+(26-2x)]-(10x+x)=100(26-2x)+10(x-2)+x,解得x=9,∴x-2=7,26-2x=8.∴原来的三位数是100×
9+10×
7+8=978.答:
原来的三位数是978.
10.
(1)方案1:
5x+200(x>
10);
4.5x+225(x>
10).
(2)购买50本时,两种方案实际付款一样多.
11.方案一:
若购买A,B两种型号的电脑.
设购买A型电脑x台,则购买B型电脑(36-x)台.根据题意,得6000x+4000(36-x)=100500,
解得x=-21.75.
经检验,x=-21.75不符合题意,电脑台数不可能是负数或小数,故舍去.
方案二:
若购买A,C两种型号的电脑.
设购买A型电脑x台,则购买C型电脑(36-x)台.根据题意,得6000x+2500(36-x)=100500,
解得x=3.∴36-x=36-3=33(台).
经检验,x=3符合题意,即购买A型电脑3台,C型电脑33台.
方案三:
若购买B,C两种型号的电脑.
设购买B型电脑x台,则购买C型电脑(36-x)台.根据题意,得4000x+2500(36-x)=100500,解得x=7.∴36-x=36-7=29(台).
经检验,x=7符合题意,即购买B型电脑7台,C型电脑29台.
综上所述,购买电脑的方案共有两种:
一种是购买A型电脑3台,C型电脑33台;
另一种是购买B型电脑7台,C型电脑29台.
Unit 2 Thisismysister.
第一课时 SectionA(1a-2d)
A 基础起航
Ⅰ.用括号中所给单词的适当形式填空。
1.Myaunthasthree__brothers__(brother).
2.HereareTom'
s__grandparents__(grandparent).
3.Therearefifty__families__(family)inthepicture.
4.Isthathis__orange__(orange)?
5.—Howisyourmother?
—__She__(her)isfine,thanks.
6.Those__are__(be)hersisters.
7.—Whoisshe?
—Sheis__my__(I)aunt.
8.__Those__(that)aremybooks.
Ⅱ.单项选择。
( A )1.Thisismy________,Jack.He'
sfiveyearsold.
A.brother B.parent
C.sisterD.father
( D )2.Mymother'
sfatherismy________.
A.motherB.father
C.parentD.grandfather
( C )3.Oh,lookatthephoto.________aremybrothers.
A.ThisB.That
C.TheseD.It
( B )4.BobandLinda________goodfriends.
A.isB.are
C.amD.be
( C )5.________hertwofriends.
A.ThisisB.Thatis
C.TheseareD.Arethese
( A )6.WangLinandI________students.Weareteachers.
A.aren'
tB.are
C.isn'
tD.is
( C )7.ThisisTom,________thisisJack.
A.orB.too
C.andD.but
( D )8.—Whoisbehindthedoor?
—________.
A.AbagB.Intheroom
C.Yes,IamD.It'
sme
Ⅲ.根据汉语意思完成句子。
1.很高兴见到你。
Niceto__meet__you.
2.这是我的好朋友,吉娜。
__This__ismygood__friend__,Gina.
3.这些是他的父母。
__These__arehis__parents__.
4.那个女孩是谁?
__Who__isthatgirl?
5.这些是你的老师吗?
__Are____these__your__teachers__?
B 语法扬帆
Ⅳ.用this,that,these,those,my,your,his或her填空。
1.Thisisaboy.__His__nameisWangGang.
2.—What'
s__that__overthere?
—It'
sabus.
3.—Are__these/those__booksyours?
—Yes,theyare.
4.—What'
s__your__name,boy?
—MynameisJinJili.
5.—Are__those__yourpencils?
—No,mypencilsarehere.
6.Hello,__this__isJane.Is__that__Peter?
7.—Is__that__abirdoverthere?
—Yes,itis.
8.Jennyisagirl.__Her__familynameisGreen.
9.IamEric.__My__familyisahappyone.
10.—Is__that__Lindaspeaking?
—Yes,it'
sLinda.
Ⅴ.句型转换。
1.Thisismyfriend.(改为复数句)
__These____are__my__friends__.
2.Thesemapsarenew.(改为单数句)
__This____map__is__new__.
3.Thesearehisgrandparents.(改为一般疑问句)
__Are____these__hisgrandparents?
4.Thosearemy_keys.(对画线部分提问)
__What____are__those?
5.Aretheseoranges?
(作否定回答)
__No__,they__aren'
t__.
C 提升冲浪
Ⅵ.完形填空。
This__1__Alice.Sheis__2__friend.Sheis12.SheandI__3__inthesame(相同的)school.Thisisher__4__.Hermother__5__anEnglishteacher.__6__thisisherfather.Herfatheris__7__Chineseteacher.Aretheseher__8__?
Yes,__9__are.We__10__friends,too.
( A )1.A.is B.are C.am
( C )2.A.meB.IC.my
( B )3.A.beB.areC.is
( A )4.A.motherB.parentsC.father
( B )5.A.beB.isC.are
( B )6.A.ButB.AndC.The
( A )7.A.aB.anC.the
( C )8.A.parentB.brotherC.brothers
( C )9.A.itB.heC.they
( B )10.A.beB.areC.is
Ⅶ.阅读理解。
A
Julia'
sfatherMr.Greenhastwobrothersandthreesisters.Julia'
smotherMrs.Greenhastwobrothersandtwosisters.Juliahasabrother.HisnameisBen.Look!
Benisonthesofa.Juliaisonthechair.Benlikessports.Hehassoccerballsandvolleyballs.Juliadoesn'
tlikesports.ShelikesreadingbooksandwatchingTV.Theyreallyhaveahappyfamily.
( C )1.Julia'
sfamilynameis________.
A.Ben B.Mr.Green
C.GreenD.Julia
( C )2.Juliahas________unclesand________aunts.
A.2;
3B.2;
2
C.4;
5D.5;
4
( C )3.________isonthesofa.
A.Julia'
sfather
B.Julia'
smother
C.Julia'
sbrother
D.Julia
( B )4.Mr.Greenhas________kid(s)(孩子).
A.1B.2
C.3D.4
( A )5.________hassoccerballsandvolleyballs.
A.BenB.Julia
sfatherD.Julia'
B
Ihaveagoodfriend.HernameisZhangYing.Sheisthirteenyearsold.Weareinthesameclass.Shehasabrother.HeisinGradeTwo.HisnameisZhangWei.Heiseightyearsold.Theirfather,Mr.Zhang,isateacher.HeteachesEnglishinNo.2MiddleSchool.Hisoffice(办公室)telephonenumberis8764-9521.Mrs.Zhangisateacher,too.ButsheteachesChinese.Theirhometelephonenumberis8754-6836.
( B )1.Who'
sthewriter'
sfriend?
A.ZhangWei.
B.ZhangYing.
C.Mr.Zhang.
D.Mrs.Zhang.
( B