u4 reading a

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1、ReadingAEnergy,electricityandbatteriesEnergyEnergyistheabilitytodosomekindofwork.Thatcanmakethingsmove,heatthingsup,ormakelightorsound.能量是做功的能力，它可以使物体运动、升温或者发出光和声音。ElectricityElectricityisatypeofenergy.Weuseittopowerthingslikelights,heaters,TVs,andcomputers.Somebusesandtrainsw

2、orkonelectricity,too.电是一种能量。电灯、暖风、电视和电脑等电器依靠电来工作。有的汽车和火车也是依靠电来驱动的。Electricalapplianceshavemetalwiresinsidethem.Electricityworksbyflowinginacurrent,alongthewires.Theelectricalenergyflowingthroughthingsmakesthemwork.用电器的内部都有金属导线。电以电流的形式沿导线流动，由此形成的电能流经用电器，使其工作。BatteryAbatterycont

3、ainsastoreofchemicals.Itturnsenergyfromthechemicalsintoelectricalenergy.Whenthechemicalenergyisusedup,thebatteryrunsoutofelectricalenergy.Itstopsworking.电池内含有多种化学物质。它能把化学物质中的能量转化成电能。当化学能耗尽后，电池也就没有了电能，电池就不能用了。READINGBeforeyouread1Doyouknowhowelectricitycomestoourhomes?powerstat

4、ionmakeelectricitycablewirelightbulb2Howdoeselectricitygettoourflats?Completethechatbelow.12435lightbulbwirecablestreetpowerstation3Howdoeselectricitymakethelightbulbshine?Electricityflowsthroughthecableandwireintoourflat.4Canweseeelectricity?5Howcanweknowthereiselectricity?No

5、,wecan’tseeelectricity.Wecanchangeelectricityintodifferentformsofenergy.6Whatarethese?batterybatteries7Whatmakesthemproduceelectricity?chemicalsWhileyouread1Lookthetitle,thepictureandthefirstandlastparagraphsof‘Aservantofmankind’.Trytoanswerthesequestions.Whatisthegirlgoingto

6、buy?Whoislookingfoolish?Whoorwhatistheservantinthetitle?Sheisgoingtobuysomesweets.Benny.Electricity.2Readthestoryagain.Findoutthemeaningsofthefollowingwordsorphrases.IIIpacketfoolexplanationservantmankindformflatconnectmake…lookfoolishkindjoinwordsthatmakesomethingclearasetofr

7、oomswhichyouliveinsomeonewhoworksforyourfamilysmallbagallhumans3Readthefollowingnewwordsaloud.*packetn.（商品的）小包装纸袋，小硬纸板盒electricityn.电foolv.愚弄flowv.流；流动explanationn.解释，说明servantn.仆人mankindn.人类formn.形式；形态energyn.能量bulbn.电灯泡flatn.公寓connectv.与……相连接*powerstationn.发电厂batteryn.电池chem

8、icaln.化学制品短语收藏夹1.apacketof一盒2.inaway在某种程度上3.shakeone’shead摇头4