八年级英语A-dangerous-servant课件

Electricity8BChapter4Adangerousservant8BChapter31.Whatdoyouthinkofelectricity?Why?2.Electricitygivespowerforallkindsofelectricalappliances.Canyounamesomeoftheelectricalappliancesweuseinourlives?

(Whenwepluganapplianceintothewallsocket,weareusingelectricityproducedbyagenerator.)electricalappliancesanairconditionerablenderaCDplayeracomputeracookerahairdryeralampakettleelectricalappliancesaheaterafananironamicrowaveanovenaprinterelectricalappliancesarecorderarefrigeratoraTVsetavacuumcleaneravideoplayerawashingmachineamobilephone(afridge)arobotWheredoesarobot’senergycomefrom?Itsenergycomesfromelectricity.Wheredoesourenergycomefrom?(Energyisthepowerthatmakesthingswork.)Perhapswithoutelectricityourliveswillnotbeinteresting.Nowletustalkaboutelectricity.Whatisit?Electricityisthepowerwhichisproducedbyrubbing(friction),byamachinecalledageneratororbychemicalmeans(e.g.abattery).Canweseeit?

No,it’sakindofenergythatwecannotsee.It’sinvisible.Canwetouchit?No,wecan’t.Wemaygetanelectricshock.It’sdangerous.PowerstationspylonshomeDoyouknowhowelectricitycomestous?Thepylonscarrywires.Wirescarryelectricity.Electricitycomesintoourflatsthroughthinwires,andthethinwiresareconnectedtothickwires.Thethickwiresarecalled

cablesandtheyareburiedunderground.Cablesareconnectedtopowerstations.Powerstationsmakeelectricity.Homework:Gooverthevocabularyitemsandrecitethem.Listentotherecordingofthearticleandreaditaloudseveraltimes.FinishEx.C/D/Eonpage46,47.Electricity8BChapter4Adangerousservant8BChapter3Ex.Fillintheblankswithproperwords:wireenergycableshock1.Youngpeoplehavemore

thanoldpeople.2.Don’ttouchthe

!You’llgetanelectric

.3.Whentheworkersweredigginguptheroad,theycutthe

,andasaresult,therewasablackoutinthearea.

athreadofmetal

thepowerthatmakesthingswork

athick,strongropemadeofwire

averystrongforceorblow

aperiodofdarknesscausedbyacutintheelectricitysupplyWecanchangeelectricityintoenergythatwecansee,hear,orfeel.Wecanalsochangeitintoenergythatmovethings.lightenergysoundenergyheatenergymovementenergy(movementmovingorbeingmoved)Canyoutellwhatkind(s)ofenergydotheyproduce?

Vocabularyelectricityn.

electrica.电的，电动的，发电的

electriccables电缆

anelectrickettle电壶

electriccurrent电流

electricala.电的，电气科学的

electricalappliances电器

anelectricalengineer电气工程师

electriciann.电工，电学家

Ifanyoftheelectricalappliancesorthewiringinyourhomeisoutoforder,youneedtofindanelectriciantorepairthem.

1)Whendidthestoryhappen?2)Bennydidn’twanttotrickDaisy,didhe?3)DoesBennyknowwhatelectricityis?4)Whymustwebecarefulwithelectricity?5)Howdoeselectricitycomeintoourhomes?6)Whatarethewiresconnectedto?7)WhatdidDaisybuyforherbrother?8)DoesDaisyknowwhatelectricityis?9)Howdobatterieswork?10)WhatdoyouthinkofBennyandDaisy?

Readaloudthearticleandanswerthefollowingquestions:Completethesentences:1)It’s

totouchtheelectricitywithyourhand.(danger)2)Wecanbuysugarin

.(pack)3)Hehadno

forwhyhewaslate.(explain)4)Water.hasthree

solid,liquidandgas.(form)5)Thethief

thetreasureunderthetree.(bury)6)Intheolddays,therichusuallyasked

todothehouseworkforthem.(serve)7)Timworksasanewspaperboyandhegetshispayfromhisboss

.(month)Homework:II.Readandreciteparagraphs4~13.III.Readandrecitethewordsandexpressions.Electricity8BChapter4Adangerousservant8BChapter3Publictransporttrainbusundergroundplanemaglevtrainphrases热能/电能/声能动能/原子能精力充沛的不同形式的能量一包信件一盒20支香烟终于起先埋电缆在某种程度上谨慎，小心变成欺骗，heatenergy/lightenergy/soundenergymovementenergy/atomicenergybeenergetic/befullofenergydifferentformsofenergyapacketoflettersapacketof20cigarettesatlast/intheend/finallyatfirst/atthebeginningofburycablesinawaybecarefulwith/ofchangeinto/turnintotricksomebody/playatrick(joke)onsomebodyFillintheblanks:foolbatteryhappinessdangerpoliterealproduceThetreescanprotectthemselvesby

achemicalthatmakestheirleavestastenasty.I’m

sorryaboutmybeinglate,sir.Whatis

,waterorfire?Wouldyouliketogetmesome

?Don’talwaysdosuch

things.Heansweredthatquestion

yesterday.Althoughtheyarepoor,theyare

.

jointogether

intheend

thatcannotbeseen

wordsthatmakesth.clearorsaywhatsth.means

shapesorkinds

powerthatmakesthingsworkormakespeopledothings

putsomethingorsomeoneintheground

averywidesmile

thickropesofwirewhichelectricitypassesthrough

powerthat(comesthroughwiresand)canmakeheat,soundandlight,andmovethings

amachinethattellsyoutheamountused

(doneorhappening)everymonth

theglasspartofanelectriclampthatgivesoutlightWriteoutwordsorexpressionsaccordingtotheirmeaning.connectatlastinvisibleexplanationformsenergyburygrincableselectricitymetermonthlyalightbulb

Choosetherightwordstocompletethesentences:Playingwithfireisvery

.(danger,dangerous)Cablesareconnected

(with,to)apowerstation.Everyone

(can,must)keepquietinthelibrary.Youneed

(alotof,many)energytoplaysquash.Wegetelectricityfromthepowerstation

(across,through)wiresandcables.Thestarsare

(visible,invisible)whenit’scloudy.Peopleusuallypaytheirrent

(month,monthly).Hewaitedforthebusforanhour.

(In,At)theend,itarrived.Ididn’tremember

(what,how)Mr.Leehadaskedmetodo.Noonecanbesure

(whatwillmanlooklike,whatmanwilllooklike)inamillionyears.Fillintheblankswiththeverbsintheirproperforms:You’dbetter

(not,take)itaway.Thepenalways

(remind)meofmycousin,becauseitwassenttomebyhim.Thepolicemanranuptothethiefand

(catch)himbythearm.Ourparentstellus

(notlaugh)atothers.Thetwocities

(connect)byanewrailway.Didyouhearwhatthechild

(explain)toyou?Theenergyoffallingwatercanbeused

(produce)electricity.ItisthebestnovelI

ever

(read)before.Completethesentenceswithproperwordsorphrases:Electricityismuch

thanwater.Electricity

awire.Youmust

electricitybecauseitisdangerous.Willyou

thiswire

thetelevision?Don’tforgetto

thelightbeforeyouleavethehouse.Youmustchangethebulbafteryou

theelectricity.It’sraininghard.You

watertheflowers.Musttheboycopythetexttoday?No,

.Buthe

copyittomorrow.MayItakethemagazineoutofthereadingroom?No,

.Thisbook

beLucy’s.Look,hernameisonthebookcover.

/时彩三星免费计划之前，在仙女没什么被他吓跑之前，他率先逃掉咯。其实，刚刚の那各月色温柔の时刻，月光如水，月明星稀，月色撩人，他是多么地想牵上她の奷手，吻上她の朱唇，他是多么迫切地想要告诉她，他有多么の爱她。可是他却像壹各可耻の逃兵，将她壹各人留在那浪漫の月色中，灿烂の星空下。虽然他の人回到咯朗吟阁，但是他の心，早就留在咯她の身边，无论她在哪里，都有他の牵挂、他の关心、他の真心、他の爱情陪伴左右，别离须臾，如影随行，相依相伴。此时此刻，后悔如潮水般地涌上他の心头，他刚才都做咯些啥啊？他怎么能狠心将她壹各人留下？他怎么能别与她风雨共担？在房里转咯壹圈，来别及落座，他就又推开咯房门，他急切地想要去找她，比任何壹各时候都急切，至于找到她之后做啥啊，他还没什么想好。别过，就算别是去直白地表明心迹，也要陪伴她走壹程，送她回怡然居。壹路上有他相伴，壹生中有他相陪，他壹定要做她最坚定の依靠，别管未来有怎样の凄风苦雨。决心壹旦下定，他再也没什么任何の犹豫，步伐坚定地朝松溪走去。秦顺儿见到王爷出来，赶快上前问道：“爷，您那是去哪儿？”“噢，爷只在府里随便走走，您，您别用跟着咯。”秦顺儿彻底糊涂咯！跟着王爷当差也有十来年咯，那可是第壹次，主子出门却没什么带奴才同行！即使是在府里，从来都是王爷去哪儿他就去哪儿。那壹次爷是要去哪里？用别着他伺候？还是说事情太机密，连他都别能晓得？第壹卷第647章迷雾他晓得秦顺儿正百思别解地望着他の背影，所以他强忍着心头の焦急，装模做样、四平八稳、慢慢地向松溪走去。当走咯壹段，估计已经脱离秦顺儿の视线之后，他の脚步别由地加快咯起来。到后来，由于担心水清已经走掉，于是脚下生风般地大踏步地前进，最后竟然紧跑咯两步。他の那几步紧跑急追，惹得路边值夜の太监以为有刺客进府，正欲上前看各究竟，幸好值夜太监经验丰富，没什么轻举妄动，而是悄然尾随。待仔细看清是王爷の时候，才吓得又赶快退回到原处，心中却是别停地犯着嘀咕：从来也没什么见过爷那么急急火火，泰山压顶都能别眨眼，那回发生啥啊大事咯？当他紧赶慢赶地再次回到他们刚刚分手の那各叫做松溪の地方，眼前の假山石，身旁の青松树，脚边の小春草