实验1空气中氧气含量的测定11.实验装置2.实验原理利用红磷在空气中燃烧消耗掉密封容器内的氧气,生成五氧化二磷白色固体,使容器内压强减小。在大气压强的作用下,水倒吸入容器内,倒吸入的水的体积即为消耗的氧气的体积。文字表达式为红磷+氧气五氧化二磷。23.实验步骤(1)连接装置;(2)检查装置的气密性;(3)在集气瓶内加入少量水,并将水面上方空间分成五等份,用弹簧夹夹紧胶皮管;(4)点燃燃烧匙内的红磷后,立即伸入集气瓶内并把塞子...
SectionB(2a-2c)Unit3Howdoyougettoschool?1Lead-inHowdoyougotoschool?walk/onfootbike2bussubway3Doyouknowhowthechildreninsmallvillagegettoschool?4562aLookatthepictureandtitlebelow.Guesswhatthepassageisabout.CrossingtheRivertoSchoolHowdostudentsgotoschool?7ReadandlearnWordsandexpressions8boatriverbridge9villagevillagerropeway10dreambetween100分leave11afraidmany=lotsofcross12课文展现13Readthepassage...
SectionB(3a-SelfCheck)Unit9Whatdoeshelooklike?1Review1.(be)ofmediumheight_________________2.aroundface_________________3.intheend_________________4.infrontof_________________5.thesameway_________________6.begoodat_________________中等身高圆脸最后在的前面同样的方式擅长于27.看起来像_________________8.一点；少量_________________9.戴眼镜_________________10.直发________________11.去看电影___________...
九年级历史下册（RJ•安徽）第六单元亚非拉国家的独立和振兴第12课亚非拉的奋起12345678910111213141516171819
SectionA(GrammarFocus-3c)Unit3Howdoyougettoschool?1Lead-insubwaytenminutes/1kilometersHowdoyougettoschool?Itakethesubway./Igettoschoolbysubway.2Howlongdoesittake?Ittakesabouttenminutes.Howfarisitfromyourhometoschool?It’sabout13kilometers.3traintwentyminutes/38kilometersbusthirtyminutes/20kilometers4Howdoyougettoschool?ItakeHowlongdoesittake?Howfatisitfromto?IttakesIt’sabout5Translatetheconver...
RJ九年级英语下册（安徽专用）1234567891011121314151617
RJ九年级英语下册（安徽专用）123456789101112131415161718
SectionB(2a-2c)Unit11Howwasyourschooltrip?1Lead-inHaveyouevergonetoasciencemuseum?Howwasthetrip?Whatdidyousee?234课文展现5Dothefollowingwordsdescribegoodthingsorbadthings?Puta√forgoodandan×forbad.Leaveablankiftheycanmeanboth.2a____interesting____difficult____lovely____slow____exciting____boring____cool____hot____lucky____large____expensive____terrible____delicious____great____cheap____fast√...
SectionA(1a-2d)Unit9Whatdoeshelooklike?1Lead-inWhoishe?HeisYaoMing.Whatdoeshedo?Heisabasketballplayer.Whatdoeshelooklike?Heistall/short.2Whoishe?HeisPanChangjiang.Whatdoeshedo?Heisanactor.Whatdoeshelooklike?Heistall/short.3ReadandlearnWordsandexpressions4longhairblackhairshorthairstraighthairshorthaircurlyhairlonghaircurlyhairstraighthairblackhairblondehairblondehair5shortofmediumheighttall6ofm...
Unit4Donteatinclass.SectionB3a-selfcheck1What’stherule?DomyhomeworkfirstwhenIgethome.2What’stherule?ImustreadabookbeforeIcanwatchTV.3What’stherule?Playbasketballonlyonweekends.onweekends4What’stherule?Ihavetopracticetheviolinforanhourafterdinner.afterdinner,foranhour5Doyouthinktherulesinyourfamilyareright?Whyorwhynot?6DearDr.Know,____youhelpme?I’mnothappybecausetherearetoomanyrulesathome.E...
SectionB(3a-SelfCheck)Unit11Howwasyourschooltrip?1ReviewReviewB:I_____tothemovie.A:What___youdoyesterday?didwentA:What___youdolastweekend?B:I___myhomework.diddidDoyouknowwhathe/she/theydid?2A:Whatdidyou___lastweekend?B:We____________________dovisitedthefirestation.A:Whatdidthey___lastweekend?B:They______________________dopickedsomestrawberries.A:How___yourtriplastweekend?B:Itwasboring.A:How____...
