1、Unit 1There are thirty students in my class.高中化学知识点归纳原电池和电解池化学知识点原电池和电解池高中化学知识点归纳原电池和电解池化学知识点原电池和电解池典型例题分析典型例题分析例例1、下图、下图x、y分别是直流电源的两极分别是直流电源的两极,通电后发现通电后发现a极板质量增加极板质量增加,b极板处有无极板处有无色无臭气体放出色无臭气体放出,符合这一情况的是符合这一情况的是(A)a极板极板b极板极板x电极电极Z溶液溶液A 锌石墨负极锌石墨负极CuSO4B 石墨石墨负极石墨石墨负极NaOHC 银铁正极银铁正极AgNO3D 铜石墨负极铜石墨负极CuCl
2、2例例2、高铁电池是一种新型可充电电池、高铁电池是一种新型可充电电池,与普通高能电池相比与普通高能电池相比,该电池能长时间该电池能长时间保持稳定保持稳定的放电电压。高铁电池的总反应为的放电电压。高铁电池的总反应为3Zn+2K2FeO4+8H2O3Zn(OH)2+2Fe(OH)+4KOH 下列叙述不正确的是下列叙述不正确的是C3A、放电时负极反应为、放电时负极反应为:Zn-2e+2OH=Zn(OH)2B、充电时阳极反应为、充电时阳极反应为:Fe(OH)3-3e+5 OH=FeO 24+4H2OC、放电时每转移、放电时每转移3 mol电子电子,正极有正极有1mol K2FeO4被氧化被氧化D、放电
3、时正极附近溶液的碱性增强、放电时正极附近溶液的碱性增强例例3、通以相等的电量、通以相等的电量,分别电解等浓度的硝酸银和硝酸亚汞分别电解等浓度的硝酸银和硝酸亚汞(亚汞的化合价为亚汞的化合价为+1价价)溶液溶液,若被还原的硝酸银和硝酸亚汞的物质的量之比若被还原的硝酸银和硝酸亚汞的物质的量之比n(硝酸银硝酸银)n(硝酸亚硝酸亚汞汞)=21,则下列表述正确的是则下列表述正确的是(D)A、在两个阴极、在两个阴极1.To listen and understand the conversation on class and classroom2.To learn to briefly introduce
4、ones classroom using there be3.To learn the words and expressions Talk about your classroom.-Whats in your classroom?-There is/are in the classroom.desk and chair桌子和椅子桌子和椅子door and window门和窗户门和窗户墙和黑板墙和黑板wall and blackboardcomputer n.计算机计算机;电脑电脑picturen.图片图片;照片照片televisionn.电视电视;电视机电视机furnituren.家具家具
5、(总称总称)mapn.地图地图a map of the worlda map of Chinablackboard book classroom computer desk furniture map picture television wall1.Look at the pictures and talk about them.In Picture 1,I can see/There is2.Listen and choose the correct picture in Activity 1.20 twenty 30 thirty 40 forty 50 fifty60 sixty 70
6、 seventy 80 eighty 90 ninetytwenty thirty forty fifty sixty seventy eighty ninety3.(A5)Listen again and repeat the numbers.Keep silent when you see.Clab your hands when you see .Repeat the numbers when you see .Do you remember English numbers from 1-10,11-19?11.eleven12.twelve13.thirteen14.fourteen1
7、5.fifteen16.sixteen17.seventeen18.eighteen19.nineteen1.one2.two3.three4.four5.five6.six7.seven8.eight9.nine10.ten十几十几-teen20.twenty30.thirty 40.50.fifty60.sixty70.seventy80.eighty90.ninety几十几十-ty几十几十 几几223349twenty-two thirty-threeforty-nine94ninety-four几几百百100200one/a hundredtwo hundred注意：注意：表达整百时，
8、表达整百时，hundred不加不加s。500five hundredseventythirtyforty-sixfiftysixtytwenty-oneeightyninetyfortytwenty217060469080502030406 Match the words with the numbers.Questions:-How many students are there in our class?-There are-How many are girls?What about boys?-3040There are pictures at the front of the clas
9、sroom.a map of Englanda map of the worldThere arent any pictures.Listen to the dialogue in Activity 3,and complete the table.Watch the video,and answer the questions.1.How many girls and boys are there in Damings class?2.Is there a lot of furniture in Lindas class?3.Whats on the teachers desk in Lin
10、das class?There are twenty girls and twenty boys in his class.Yes,there is.There is a computer on the teachers desk.1.Read the dialogue aloud for a few minutes by yourself;2.Role play in groups;3.Role play in front of the class.Well see which group does the best.Read the dialogue aloudFill in the bl
11、anks to finish the summary of the text and then try to retell it.Linda and Daming are talking about their classes.In Lindas class,there are _ students.There _ a computer on her teachers desk.There are _ pictures on the classroom walls.There is a map of _ in Lindas classroom.thirtyissomeEnglandThere
12、are _ students in Damings class.There are _ boys and _ girls.In the classroom,there is a map of the _.There arent _ _ on the classroom walls.worldfortytwentytwentyany pictures7 Pair work.Write about your classroom.Use numbers.A:How manyare there in?B:There is/are 8 Work in pairs.Talk about your idea
13、l classroom.A:How manyare there in your classroom?B:There are A:Is there a B:Yes,there is./No,there isnt.A:Are there?B:Yes,there are./No,there arent.some are classroom computer teachergirl thirty1.Betty beat a bit of butter to make a better butter.2.The eggs he sells everyday are better than everybo
14、dy else sells.3.Six sharp smart sharks.how many 多少多少a lot of 大量；许多大量；许多at/in the front of.在在的前部的前部a map of.一张一张地图地图in front of.在在的前面的前面.找出与所给单词划线部分读音的不同项找出与所给单词划线部分读音的不同项()1.someA.bus B.front C.woman D.summer()2.teacherA.number B.sport C.actor D.flower()3.afterA.father B.aunt C.last D.autumnCBD()4.g
15、irlA.morning B.thirteen C.birthday D.work()5.manA.bag B.manager C.dad D.whatDA.根据语境从方框中选择恰当的单词填根据语境从方框中选择恰当的单词填 空，每词限用一次。空，每词限用一次。1.Can you see the school on the _?Its a new one.2.Twenty and twenty is _.3.Thats _ a big chair.Lets sit on it.4._ students want to go to the farm.5.His grandpa is _ years
16、 old.mapfortyreallyManyninety1.Whats your classroom like?2.How many students are there in your class?3.Whats in your classroom?*Its big/small.*There are students in my class.*There is a/an in my classroom.There are some There arent any Questions for reference:用用There be句型描写一下教室句型描写一下教室或者你的房间。（至少或者你的房间。（至少5句）句）
