最新扬声器声学基础_2课件ppt.ppt

《最新扬声器声学基础_2课件ppt.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、扬声器声学基础_2号筒式压电扬声器电容式扬声器等离子体扬声器动圈式扬声器常见类型扬声器－I电磁式扬声器低频扬声器中频扬声器高频扬声器同轴扬声器常见类型扬声器－II松下16mm先锋20x30mmLesson30Grandma'sBirthdayParty课前自主预习课堂互动探究Unit5FamilyandHome课前自主预习单词闯关1.摆放(餐具)；放置；落下[set]________2.teacup['tiːkʌp]________set茶杯Lesson30Grandma'sBirthdayParty短语互译

2、1.举行聚会________________2．和……玩耍________________3.setthetable________________4．havefun________________haveapartyplaywith…摆放餐具玩得高兴Lesson30Grandma'sBirthdayParty句型在线1.它(生日聚会)在我奶奶和爷爷家举办。It'satmy________and________house.2．我妹妹琳正在和我的表妹海蒂一起玩。MysisterLynnis___________

3、__mycousin,Heidi.3．我奶奶收到很多礼物。Mygrandma________manypresents.grandmagrandpa'splayingwithgetsLesson30Grandma'sBirthdayParty课堂互动探究词汇点睛setv.摆放(餐具)；放置；落下[观察]MybrotherBobissettingthetable.我的哥哥鲍勃正在摆放餐具。Pleasesetthechairinthecorner.请把椅子放在角落。Thesunsetsinthewest.太阳在西方

4、落下。Lesson30Grandma'sBirthdayParty[探究]set的用法：词性含义常见短语动词摆放(餐具)；放置；落下setthetable摆放餐具setthewatch对表setanexample树立榜样名词(一)套；(一)副asetof…一套……Lesson30Grandma'sBirthdayParty活学活用(1)你摆放好餐具吃晚饭好吗？Couldyou________________________forsupper?(2)琳达有两套彩色铅笔。Lindahas_____________

5、___________colourpencils.setthetabletwosetsofLesson30Grandma'sBirthdayParty句型透视1It'satmygrandmaandgrandpa'shouse.它(生日聚会)在我奶奶和爷爷家举办。[探究]以上例句中使用了名词所有格来表示“……的”。“A'sandB's＋名词复数”表示“A的和B的……(各自所有)”。“AandB's＋名词单数”表示“A和B的……(共同所有)。”例如：Lesson30Grandma'sBirthdayPartyDa

6、nny'sandJenny'sfathersarebothdoctors.丹尼的爸爸和詹妮的爸爸都是医生。DannyandJenny'sfatherisadoctor.丹尼和詹妮的爸爸是一名医生。Lesson30Grandma'sBirthdayParty活学活用(1)________motherscan'tgototheparents'meetingbecausetheyaretoobusy.A．Jack'sandPaulB．Jack'sandPaul'sC．JackandPaul'sD．JackandPa

7、ul(2)Lookatthemanoverthere.Heis________uncle.A.Jim'sandTim'sB.Jim'sandTimC.JimandTimD.JimandTim'sBDLesson30Grandma'sBirthdayParty2MysisterLynnisplayingwithmycousin,Heidi.我妹妹琳正在和我的表妹海蒂一起玩。[探究](1)Lynn是mysister的同位语。(2)playwithsb.意为“和某人一起玩”；playwithsth.意为“玩耍某物”

8、。例如：Don'tplaywithfire.别玩火。Lesson30Grandma'sBirthdayParty活学活用他们正在公园玩詹妮的玩偶。Theyare_________________Jenny'sdollinthepark.playingwithLesson30Grandma'sBirthdayParty3Mygrandmagetsmanypresents.我奶奶收到很多礼物。[探究]g