与氧气相关反应(1)单质与氧气的反应:(化合反应)1.镁在空气中燃烧:2Mg+O2点燃2MgO2.铁在氧气中燃烧:3Fe+2O2点燃Fe3O43.铜在空气中受热:2Cu+O2加热2CuO4.铝在空气中燃烧:4Al+3O2点燃2Al2O35.氢气中空气中燃烧:2H2+O2点燃2H2O6.红磷在空气中燃烧(研究空气组成的实验):4P+5O2点燃2P2O57.硫粉在空气中燃烧:S+O2点燃SO28.碳在氧气中充分燃烧:C+O2点燃CO29.碳在氧气中不充分燃烧:2C+O2点燃2CO(2)化合物与氧气的反应...
Unit1MakingNewFriends【重点短语】1.goodmorning/afternoon/evening早上/下午/晚上好2.glad/nicetomeet/seeyou见到你很高兴3.welcometo+地点欢迎来到4.let’s+v让我们做5.standup起立6.sitdown坐下7.thisis...这是8.thanks=thankyou谢谢9.seeyou=seeyoulater=goodbye再见10.IDnumber身份证号码11.befrom=comefrom来自12.inEnglish用英语【重要句型】1.---What’syourname?---MynameisSally.2.---Whereareyoufrom?---I’mfromCh...
1.Mycomputergameisinthebookcase.(对划线部分提问)Where’syourcomputergame?2.Hisbookisonthetable.(变为一般疑问句,并作否定回答)Ishisbookonthetable?No,itisn’t.3.Icanseetheballunderthechair.(变为一般疑问句)。Canyouseetheballunderthechairs?4.PleasetakeyourbrothertheEnglishbook.(变为同义句)PleasetaketheEnglishbooktoyourbrother.5.Itisonthedresser.(变为复数句)Theyareonthedresser.6.Shelikesartbe...